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• Voice Recognition Connection problem

  - by user244190

  I,m trying to work through and test a Voice Recognition example based on the VoiceRecognition.java example at http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/app/VoiceRecognition.html but when click on the button to create the activity, I get a dialog that says Connection problem. My Manifest file is using the Internet Permission, and I understand it passes the to the Google Servers. Do I need to do anything else to use this. Code below UPDATE: Ok, I was able to replace my emulator image with one from HTC that appears to come with Google Voice Search, however now when I run from the emulator, i'm getting an Audio Problem message with Speak Again or Cancel buttons. It appears to make it back to the onActivityResult(), but the resultCode is 0. Here is the LogCat output: 03-07 20:21:25.396: INFO/ActivityManager(578): Starting activity: Intent { action=android.speech.action.RECOGNIZE_SPEECH comp={com.google.android.voicesearch/com.google.android.voicesearch.RecognitionActivity} (has extras) } 03-07 20:21:25.406: WARN/ActivityManager(578): Activity is launching as a new task, so cancelling activity result. 03-07 20:21:25.968: WARN/ActivityManager(578): Activity pause timeout for HistoryRecord{434f7850 {com.ikonicsoft.mileagegenie/com.ikonicsoft.mileagegenie.MileageGenie}} 03-07 20:21:26.206: WARN/AudioHardwareInterface(554): getInputBufferSize bad sampling rate: 16000 03-07 20:21:26.256: ERROR/AudioRecord(819): Recording parameters are not supported: sampleRate 16000, channelCount 1, format 1 03-07 20:21:26.696: INFO/ActivityManager(578): Displayed activity com.google.android.voicesearch/.RecognitionActivity: 1295 ms 03-07 20:21:29.890: DEBUG/dalvikvm(806): threadid=3: still suspended after undo (s=1 d=1) 03-07 20:21:29.896: INFO/dalvikvm(806): Uncaught exception thrown by finalizer (will be discarded): 03-07 20:21:29.896: INFO/dalvikvm(806): Ljava/lang/IllegalStateException;: Finalizing cursor android.database.sqlite.SQLiteCursor@435d3c50 on ml_trackdata that has not been deactivated or closed 03-07 20:21:29.896: INFO/dalvikvm(806): at android.database.sqlite.SQLiteCursor.finalize(SQLiteCursor.java:596) 03-07 20:21:29.896: INFO/dalvikvm(806): at dalvik.system.NativeStart.run(Native Method) 03-07 20:21:31.468: DEBUG/dalvikvm(806): threadid=5: still suspended after undo (s=1 d=1) 03-07 20:21:32.436: WARN/IInputConnectionWrapper(806): showStatusIcon on inactive InputConnection I,m still not sure why I,m getting the Connect problem on the Droid. I can use Voice Search ok. I also tried clearing the cache, and data as described in some posts, butstill not working?? /** * Fire an intent to start the speech recognition activity. */ private void startVoiceRecognitionActivity() { Intent intent = new Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH); intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL, RecognizerIntent.LANGUAGE_MODEL_FREE_FORM); intent.putExtra(RecognizerIntent.EXTRA_PROMPT, "Speech recognition demo"); startActivityForResult(intent, VOICE_RECOGNITION_REQUEST_CODE); } /** * Handle the results from the recognition activity. */ @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == VOICE_RECOGNITION_REQUEST_CODE && resultCode == RESULT_OK) { // Fill the list view with the strings the recognizer thought it could have heard ArrayList<String> matches = data.getStringArrayListExtra( RecognizerIntent.EXTRA_RESULTS); mList.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, matches)); } super.onActivityResult(requestCode, resultCode, data); }

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• Chrome Extension - Cross-Origin XMLHttpRequest - Returning HTML/JSON

  - by Tyler

  Hi everyone, I hope you can help me :) I've created a Chrome extension (my first one) and I'm having some difficulty auto-populating a <select> with <option> that are being returned. the default_popup page is index.htm. I have two <select> (listboxes? can't remember the name) boxes. When a user first clicks the extension, it performs a XMLHttpRequest to a php script and get's a list of names from a MySQL database. It returns (onLoad) the list in the form of: <option>blah</option> When a user selects an option from the first listbox/select, it performs another XMLHttpRequest and auto-populates the second listbox/select. Then when a user selects an option from the second listbox it will eventually populate a few details further down the page. I've been testing by just running the index.htm file and seeing if just the code works correctly, which it does. However when trying to view it from the extension, it doesn't work. The onLoad doesn't fill in the first listbox, and selecting an option (one that I typed in the box for testing purposes) from the first listbox doesn't populate the second listbox. I thought maybe it was a permissions error, so I tried adding the domain to the manifest.json file; but I appear to be getting an error in the manifest.json file after doing so. In my default_popup (index.htm) file I have this script for my XMLHttpRequest: <script type="text/javascript"> function getClient(str,type) { if (str=="") { document.getElementById(type).innerHTML=""; return; } if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.getElementById(type).innerHTML=xmlhttp.responseText; } } xmlhttp.open("GET","http://(domain removed)/Extension/getInfo.php?q="+type+"&c="+str,true,"user","pass"); xmlhttp.send(); } </script> This is what my manifest.json file looks like: { "name": "Client Center Lite", "version": "1.0", "description": "blah", "browser_action": { "default_icon": "images/icon_19.png", "default_popup": "index.htm", "default_title": "Client Center Lite" }, "icons":{ "128":"images/icon_128.png" } "permissions": { "http://(domain removed)/" }, } Am I doing this correctly? The point of the extension is to be able to quickly view client details. The extension will only be given to employees locally in a .crx file, and not distributed online. The domain I am accessing through the PHP/MySQL is accessible from the web, but I'm currently using localhost in my mysql_connect string. Do I need to be returning the <option> elements encoded as JSON? If so, I'm completely cluesless as how to do that.

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• How do you Send More that 20 Parameters to a Stored Procedure Using ODP.Net?

  - by discwiz

  Switching from Microsofts Oracle Driver to ODP.NET version 10.2.0.100. After changing the data types to OracleDBTypes in a procedure, that worked perficetly using System.Data.OracleClient, the procedure fails if we try and pass in more that 20 parameters. The error returned is: ORA-06550: line 1, column 7: PLS-00306: wrong number or types of arguments in call to 'ADD_TARP_EVENT' ORA-06550: line 1, column 7: PL/SQL: Statement ignorede If we reduce the number of parameters to less than 20 it works. Is this a known issue? Thanks, Dave Here the code for creating the parameters: Shared Function CreateTarpEventCommand(ByVal aTarpEvent As TARPEventType) As OracleCommand Dim cmd As New OracleCommand With aTarpEvent cmd.Parameters.Add(New OracleParameter("I_facID_C", OracleDbType.Char)).Value = .FacilityShortName cmd.Parameters.Add(New OracleParameter("I_facName_VC", OracleDbType.Varchar2)).Value = .FacilityLongName cmd.Parameters.Add(New OracleParameter("I_client_VC", OracleDbType.Varchar2)).Value = .ComputerNameTarpIsRunningOn cmd.Parameters.Add(New OracleParameter("I_TARP_Version_VC", OracleDbType.Varchar2)).Value = .TarpVersionNumber cmd.Parameters.Add(New OracleParameter("I_NAS_Type_VC", OracleDbType.Varchar2)).Value = .FacilityNASSystemType cmd.Parameters.Add(New OracleParameter("I_Aircraft1_Callsign_VC", OracleDbType.Varchar2)).Value = .Aircraft1Callsign If .Aircraft1Type Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft1_Type_VC", OracleDbType.Varchar2)).Value = .Aircraft1Type End If If .Aircraft1Category Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft1_Cat_VC", OracleDbType.Varchar2)).Value = .Aircraft1Category End If cmd.Parameters.Add(New OracleParameter("I_Aircraft2_Callsign_VC", OracleDbType.Varchar2)).Value = .Aircraft2Callsign If .Aircraft2Type Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft2_Type_VC", OracleDbType.Varchar2)).Value = .Aircraft2Type End If If .Aircraft2Category Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft2_Cat_VC", OracleDbType.Varchar2)).Value = .Aircraft2Category End If If .SensorShortName Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Sensor_Name_VC", OracleDbType.Varchar2)).Value = .SensorShortName End If If .TarpConfigurationName Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_TARP_Config_Name_VC", OracleDbType.Varchar2)).Value = .TarpConfigurationName End If If .EntryCreatorID Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Create_VC", OracleDbType.Varchar2)).Value = .EntryCreatorID End If If .LogAction Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Log_Action_VC", OracleDbType.Varchar2)).Value = .LogAction End If cmd.Parameters.Add(New OracleParameter("I_TARP_Mode_VC", OracleDbType.Varchar2)).Value = .TarpOperatingMode cmd.Parameters.Add(New OracleParameter("I_Min_Loss_N", OracleDbType.Decimal)).Value = .ClosestMeasureOfLoSS If .MapName Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_MAP_NAME_VC", OracleDbType.Varchar2)).Value = .MapName End If If .TarpConfigurationFileHash Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_CONFIG_HASH_VC", OracleDbType.Varchar2)).Value = .TarpConfigurationFileHash End If Dim aDate As OracleDate = CType(.LossEventsMessages(0).LossEventTime, System.DateTime) cmd.Parameters.Add(New OracleParameter("I_FIRST_LOSS_EVENT_DATE", OracleDbType.Date)).Value = aDate cmd.Parameters.Add(New OracleParameter("I_FIRST_LOSS_EVENT_MS_N", OracleDbType.Int32)).Value = .LossEventsMessages(0).LossEventMilliSeconds If .ZippedMapFiles Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Map_File_BL", OracleDbType.Blob)).Value = .ZippedMapFiles End If cmd.Parameters.Add(New OracleParameter("I_TARP_Package_BL", OracleDbType.Blob)).Value = .ZippedTarpPackageWithoutMaps cmd.Parameters.Add(New OracleParameter("rs_RESULTS", OracleDbType.RefCursor)).Direction = ParameterDirection.Output End With Return cmd End Function And here is the code for executing the procedure: Dim workingDataSet As New DataSet Dim oracleConnection As New OracleConnection Dim cmd As New OracleCommand Dim oracleDataAdapter As New OracleDataAdapter Try Using oracleConnection oracleConnection.ConnectionString = System.Configuration.ConfigurationManager.AppSettings("MasterConnectionODT") cmd = HelperDB.CreateTarpEventCommand(TarpEvent) cmd.Connection = oracleConnection cmd.CommandText = "LOADER.ADD_TARP_EVENT" cmd.CommandType = CommandType.StoredProcedure Using oracleConnection oracleConnection.Open() Dim aTransation As OracleTransaction = oracleConnection.BeginTransaction(IsolationLevel.ReadCommitted) Try Using oracleDataAdapter oracleDataAdapter = New OracleDataAdapter(cmd) oracleDataAdapter.TableMappings.Add("Results", "rs_Max") oracleDataAdapter.Fill(workingDataSet) ....

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• Android GridView with ads below

  - by ktambascio

  Hi, I'm trying to integrate ads (admob) into my Android app. It's mostly working, except for one issue with the layout. My layout consists of: <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent" xmlns:app="http://schemas.android.com/apk/res/com.example.photos"> <LinearLayout android:orientation="horizontal" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/status_layout"> <ImageView android:id="@+id/cardStatus" android:layout_width="wrap_content" android:layout_height="wrap_content" /> <TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/hello" android:id="@+id/cardStatusText" /> </LinearLayout> <GridView android:id="@+id/imageGridView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:padding="10dp" android:verticalSpacing="10dp" android:horizontalSpacing="10dp" android:numColumns="auto_fit" android:columnWidth="100dp" android:stretchMode="columnWidth" android:gravity="center" android:layout_below="@id/status_layout" /> <!-- Place an AdMob ad at the bottom of the screen. --> <!-- It has white text on a black background. --> <!-- The description of the surrounding context is 'Android game'. --> <com.admob.android.ads.AdView android:id="@+id/ad" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentBottom="true" app:backgroundColor="#000000" app:primaryTextColor="#FFFFFF" app:secondaryTextColor="#CCCCCC" app:keywords="Android Photo" /> </RelativeLayout> The ads are shown at the bottom of the screen, just as I want. However, they seem to be overlayed or drawn on top of the bottom portion of the grid view. I would like the gridview to be shorter, so that the ad can fill the bottom portion of the screen, and not hide part of the gridview. The problem is most annoying when you scroll all the way to the bottom of the gridview, and you still cannot fully see the last row items in the grid due to the ad. I'm not sure if this is the standard way that AdMob ads work. If this is the case, adding some padding to the bottom of the grid (if that's possible) would due the trick. That way the user can scroll a bit further, and see the last row in addition to the ad. I just switched from using LinearLayout to RelativeLayout after reading some similar issues with ListViews. Now my ad is along the bottom instead of above the grid, so I'm getting closer. Thoughts? -Kevin

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• ASP.NET MVC ViewModel Pattern

  - by Omu

  EDIT: I made something much better to fill and read data from a view using ViewModels, called it ValueInjecter. http://valueinjecter.codeplex.com/documentation using the ViewModel to store the mapping logic was not such a good idea because there was repetition and SRP violation, but now with the ValueInjecter I have clean ViewModels and dry mapping code I made a ViewModel pattern for editing stuff in asp.net mvc this pattern is usefull when you have to make a form for editing an entity and you have to put on the form some dropdowns for the user to choose some values public class OrganisationViewModel { //paramterless constructor required, cuz we are gonna get an OrganisationViewModel object from the form in the post save method public OrganisationViewModel() : this(new Organisation()) {} public OrganisationViewModel(Organisation o) { Organisation = o; Country = new SelectList(LookupFacade.Country.GetAll(), "ID", "Description", CountryKey); } //that's the Type for whom i create the viewmodel public Organisation Organisation { get; set; } #region DropDowns //for each dropdown i have a int? Key that stores the selected value public IEnumerable<SelectListItem> Country { get; set; } public int? CountryKey { get { if (Organisation.Country != null) { return Organisation.Country.ID; } return null; } set { if (value.HasValue) { Organisation.Country = LookupFacade.Country.Get(value.Value); } } } #endregion } and that's how i use it public ViewResult Edit(int id) { var model = new OrganisationViewModel(organisationRepository.Get(id)); return View(model); } [AcceptVerbs(HttpVerbs.Post)] public ActionResult Edit(OrganisationViewModel model) { organisationRepository.SaveOrUpdate(model.Organisation); return RedirectToAction("Index"); } and the markup <p> <label for="Name"> Name:</label> <%= Html.Hidden("Organisation.ID", Model.Organisation.ID)%> <%= Html.TextBox("Organisation.Name", Model.Organisation.Name)%> <%= Html.ValidationMessage("Organisation.Name", "*")%> </p> <p> ... <label for="CountryKey"> Country:</label> <%= Html.DropDownList("CountryKey", Model.Country, "please select") %> <%= Html.ValidationMessage("CountryKey", "*") %> </p> so tell me what you think about it

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• Using Microsoft.Office.Interop to save created file with C#

  - by Eyla

  I have the this code that will create excel file and work sheet then insert same values. The problem I'm facing that I'm not able to save the file with name giving ten colse it. I used SaveAs but did not work: wb.SaveAs(@"C:\mymytest.xlsx", missing, missing, missing, missing, missing, XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, missing); this line of code would give me this error: Microsoft Office Excel cannot access the file 'C:\A3195000'. There are several possible reasons: • The file name or path does not exist. • The file is being used by another program. • The workbook you are trying to save has the same name as a currently open workbook. please advice to solve this problem. here is my code: private void button1_Click(object sender, EventArgs e) { Microsoft.Office.Interop.Excel.Application xlApp = new Microsoft.Office.Interop.Excel.Application(); if (xlApp == null) { MessageBox.Show("EXCEL could not be started. Check that your office installation and project references are correct."); return; } xlApp.Visible = true; Workbook wb = xlApp.Workbooks.Add(XlWBATemplate.xlWBATWorksheet); Worksheet ws = (Worksheet)wb.Worksheets[1]; if (ws == null) { MessageBox.Show("Worksheet could not be created. Check that your office installation and project references are correct."); } // Select the Excel cells, in the range c1 to c7 in the worksheet. Range aRange = ws.get_Range("C1", "C7"); if (aRange == null) { MessageBox.Show("Could not get a range. Check to be sure you have the correct versions of the office DLLs."); } // Fill the cells in the C1 to C7 range of the worksheet with the number 6. Object[] args = new Object[1]; args[0] = 6; aRange.GetType().InvokeMember("Value", BindingFlags.SetProperty, null, aRange, args); // Change the cells in the C1 to C7 range of the worksheet to the number 8. aRange.Value2 = 8; // object missing = Type.Missing; // wb.SaveAs(@"C:\mymytest.xlsx", missing, missing, missing, missing, //missing, XlSaveAsAccessMode.xlExclusive, missing, missing, missing, missing, //missing); }

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• the data can't display in the form....

  - by shimaTun

  i wrote code to view data after user fill the form...but the data can't display.... this the code : <?php include "connectioncomplaint.php"; $userid = $_GET['userid']; $secname = $_GET['secname']; $subject = $_GET['subject']; $comment = $_GET['comment']; //Tarik data dari sini $queryDetail = " SELECT * FROM campuscomplaint " . " WHERE userid = '". $userid . "' AND secname = '". secname . "' "; $resultDetail = mysql_query($queryDetail); $detail = mysql_fetch_array($resultDetail); ?> and this code for form: <tr> <td height="400" colspan="7" bgcolor="#FFFFFF"> <table width="67%" align="center" border="1" bordercolor="#ABD519" cellpadding="2" cellspacing="2"> <tr bordercolor="#0000FF" bgcolor="#000033"> <td colspan="2" align="center" valign="top" bgcolor="#ABD519"> --- Complaint Detail --- &nbsp;</td> </tr> <tr bordercolor="#FFFFFF"> <td width="40%" class="register">User ID:</td> <td width="62%" class="register"><?php echo $detail['userid']; ?></td></tr> <tr bordercolor="#FFFFFF"> <td width="40%" class="register">Section Name:</td> <td width="62%" class="register"><?php echo $detail['secname']; ?></td></tr> <tr> <td width="40%" bordercolor="#FFFFFF" bgcolor="#FFFFFF" class="register">Subject:</td> <td width="62%" bordercolor="#FFFFFF" bgcolor="#FFFFFF" class="register"><?php echo $detail['subject']; ?></td></tr> <tr> <td width="40%" bordercolor="#FFFFFF" bgcolor="#FFFFFF" class="register">Comment:</td> <td width="62%" bordercolor="#FFFFFF" bgcolor="#FFFFFF" class="register"><?php echo $detail['comment']; ?></td></tr> <tr bordercolor="#0000FF" bgcolor="#ABD519"> <td colspan="2" align="center" valign="top">&nbsp;</td> </tr> </table> how to view data from dbase?.... help me...

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• Have Button re-appear immediately after clicking button in ListView row

  - by Soeren

  I have 4 buttons on a page. Each button opens a modal window and let’s the user input data in a form. When the user hits the save button in the modal, a ListView appears on the page with the submitted data. The button the user clicked to open the modal window is set to visible=false, so it’s gone when the row is added to the ListView. Now there are 3 buttons and the same goes for those; when the user hits a button, a modal appears, and when the modal form is submitted, the button disappears and a row is added to the ListView. In the ListView row, there is a delete button. When this button is clicked, the row is deleted and the button that was initially clicked to add this row (and open the modal), SHOULD reappear, but it doesn’t. The row disappears, but I have to refresh the page before the button comes back. There is a ScriptManager on the masterpage, so I guess this is an AJAX partial refresh issue. I tried adding different events, but I can’t find the one that fires at the right time. I use an ObjectDataSource to fill the ListView, and the data comes from a database, wrapped in a business object. This code loads a business object in a List< and checks if the user inserted an item of a specific type. If he did, the button he used to open the modal is hidden. This works fine (maybe not the most elegant) _goals = GoalManager.GetGoalsByUser(UserID); if (_goals != null) { foreach (Goal _goalinlist in _goals) { if (_goalinlist.GoalType == 1) { Button1.Visible = false; goalid1 = true; } if (_goalinlist.GoalType == 2) { Button2.Visible = false; goalid2 = true; } if (_goalinlist.GoalType == 3) { Button3.Visible = false; goalid3 = true; } if (_goalinlist.GoalType == 4) { Button4.Visible = false; goalid4 = true; } } } As you can see, I tried setting a boolean, and then check it when the page is re-loaded. But the problem (I guess) is that the whole page isn't refreshed when the delete button is clicked in the ListView. This is the delete button in the ListView: <asp:ImageButton ID="ImageButton2" runat="server" CommandName="Delete" CausesValidation="false" ToolTip="Delete" CommandArgument='<%#Eval("GoalID")%>' ImageUrl="delete.gif" OnClientClick="return confirm('Delete this post?');" CssClass="button"/> I guess the question is, how do I make the button re-appear right after the ListView button is clicked?

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• Gridview header issue: call event on header

  - by Joris

  Now I got this gridview, And I need the headers to be clickable, whereafter an event starts (something like OnClickHeader="header_ClickEvent"?) Ofcourse there is a SortExpression element, which enables to sort the grid, but I want to be able to start any event, like when clicking a button. I could not find any solution within the asp:BoundField nor asp:TemplateField... I thought a hyperlink could solve the problem, but that was a bit premature. Also, when using a TemplateField, I find it very hard to fill the column with data. Could anyone bring me the solution? The Gridview: <asp:GridView CssClass="gridview" ID="GridView1" runat="server" AllowPaging="True" AllowSorting="True" AutoGenerateColumns="False" DataKeyNames="Student_key" OnSelectedIndexChanged="GridView1_SelectedIndexChanged" PagerSettings-Visible="false" PageSize="14"> <HeaderStyle CssClass="headerstyle" /> <RowStyle CssClass="rowstyle"/> <AlternatingRowStyle CssClass="altrowstyle" /> <Columns> <asp:BoundField DataField="Studentnumber" HeaderText="Studentnummer" > <HeaderStyle CssClass="header100" /> </asp:BoundField> <asp:BoundField DataField="Prefix" HeaderText="Voorletters" > <HeaderStyle CssClass="header75" /> </asp:BoundField> <asp:BoundField DataField="prename" HeaderText="Voornaam" SortExpression="Voornaam"> <HeaderStyle CssClass="header75" /> </asp:BoundField> <asp:BoundField DataField="nickname" HeaderText="Roepnaam" > <HeaderStyle CssClass="header100" /> </asp:BoundField> <asp:BoundField DataField="insertion" HeaderText="Tussenvoegsel" > <HeaderStyle CssClass="header100" /> </asp:BoundField> <asp:BoundField DataField="surname" HeaderText="Achternaam"> <HeaderStyle CssClass="header100" /> </asp:BoundField> <asp:CommandField SelectText="show results" ShowSelectButton="True" > <HeaderStyle CssClass="header100" /> </asp:CommandField> </Columns> <EmptyDataTemplate >There are no results shown, please try again.</EmptyDataTemplate> </asp:GridView>

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• Problem receving in RXTX

  - by drhorrible

  I've been using RXTX for about a year now, without too many problems. I just started a new program to interact with a new piece of hardware, so I reused the connect() method I've used on my other projects, but I have a weird problem I've never seen before. The Problem The device works fine, because when I connect with hyperterminal, I send things and receive what I expect, and Serial Port Monitor(SPM) reflects this. However, when I run the simple hyperterminal-clone I wrote to diagnose the problem I'm having with my main app, bytes are sent, according to SPM, but nothing is received, and my SerialPortEventListener never fires. Even when I check for available data in the main loop, reader.ready() returns false. If I ignore this check, then I get an exception, details below. Relevant section of connect() method // Configure and open port port = (SerialPort) CommPortIdentifier.getPortIdentifier(name) .open(owner,1000) port.setSerialPortParams(baud, databits, stopbits, parity); port.setFlowControlMode(fc_mode); final BufferedReader br = new BufferedReader( new InputStreamReader( port.getInputStream(), "US-ASCII")); // Add listener to print received characters to screen port.addEventListener(new SerialPortEventListener(){ public void serialEvent(SerialPortEvent ev) { try { System.out.println("Received: "+br.readLine()); } catch (IOException e) { e.printStackTrace(); } } }); port.notifyOnDataAvailable(); Exception java.io.IOException: Underlying input stream returned zero bytes at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:268) at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:306) at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:158) at java.io.InputStreamReader.read(InputStreamReader.java:167) at java.io.BufferedReader.fill(BufferedReader.java:136) at java.io.BufferedReader.read(BufferedReader.java:157) at <my code> The big question (again) I think I've eliminated all possible hardware problems, so what could be wrong with my code, or the RXTX library? Edit: something interesting When I open hyperterminal after sending a bunch of commands from java that should have gotten responses, all of the responses appear immediately, as if they had been put in the buffer somewhere, but unavailable. Edit 2: Tried something new, same results I ran the code example found here, with the same results. No data came in, but when I switched to a new program, it came all at once. Edit 3 The hardware is fine, and even a different computer has the same problem. I am not using any sort of USB adapter. I've started using PortMon, too, and it's giving me some interesting results. Hyperterminal and RXTX are not using the same settings, and RXTX always polls the port, unlike HyperTerminal, but I still can't see what settings would affect this. As soon as I can isolate the configuration from the constant polling, I'll post my PortMon logs. Edit 4 Is it possible that some sort of Windows update in the last 3 months could have caused this? It has screwed up one of my MATLAB mex-based programs once. Edit 5 I've also noticed some things that are different between HyperTerminal, RXTX, and a separate program I found that communicates with the device (but doesn't do what I want, which is why I'm rolling my own program) HyperTerminal - set to no flow control, but Serial Port Monitor's RTS and DTR indicators are green Other program - not sure what settings it thinks it's using, but only SPM's RTS indicator is green RXTX - no matter what flow control I set, only SPM's CTS and DTR indicators are on. From Serial Port Monitor's help files (paraphrased): the indicators display the state of the serial control lines RTS - Request To Send CTS - Clear To Send DTR - Data Terminal Ready

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• Object of type 'customObject' cannot be converted to type 'customObject'.

  - by Phani Kumar PV

  i am receiving the follwing error when i am invoking a custom object "Object of type 'customObject' cannot be converted to type 'customObject'." Following is the scenario when i am getting the error i am invoking a method in a dll dynamically. Load an assembly CreateInstance.... calling MethodInfo.Invoke() passing int, string as a parameter for my method is working fine = No exceptions are thrown. But if I try and pass a one of my own custom class objects as a parameter, then I get an ArgumentException exception, and it is not either an ArgumentOutOfRangeException or ArgumentNullException. "Object of type 'customObject' cannot be converted to type 'customObject'." I am doing this in a web application. The class file containing the method is in a different proj . also the custom object is a sepearte class in the same file. there is no such thing called a static aseembly in my code. I am trying to invoke a webmethod dynamically. this webmethod is having the customObject type as an input parameter. So when i invoke the webmethod i am dynamically creating the proxy assembly and all. From the same assembly i am trying to create an instance of the cusotm object assinging the values to its properties and then passing this object as a parameter and invoking the method. everything is dynamic and nothing is created static.. :( add reference is not used. Following is a sample code i tried to create it public static object CallWebService(string webServiceAsmxUrl, string serviceName, string methodName, object[] args) { System.Net.WebClient client = new System.Net.WebClient(); //-Connect To the web service using (System.IO.Stream stream = client.OpenRead(webServiceAsmxUrl + "?wsdl")) { //--Now read the WSDL file describing a service. ServiceDescription description = ServiceDescription.Read(stream); ///// LOAD THE DOM ///////// //--Initialize a service description importer. ServiceDescriptionImporter importer = new ServiceDescriptionImporter(); importer.ProtocolName = "Soap12"; // Use SOAP 1.2. importer.AddServiceDescription(description, null, null); //--Generate a proxy client. importer.Style = ServiceDescriptionImportStyle.Client; //--Generate properties to represent primitive values. importer.CodeGenerationOptions = System.Xml.Serialization.CodeGenerationOptions.GenerateProperties; //--Initialize a Code-DOM tree into which we will import the service. CodeNamespace nmspace = new CodeNamespace(); CodeCompileUnit unit1 = new CodeCompileUnit(); unit1.Namespaces.Add(nmspace); //--Import the service into the Code-DOM tree. This creates proxy code //--that uses the service. ServiceDescriptionImportWarnings warning = importer.Import(nmspace, unit1); if (warning == 0) //--If zero then we are good to go { //--Generate the proxy code CodeDomProvider provider1 = CodeDomProvider.CreateProvider("CSharp"); //--Compile the assembly proxy with the appropriate references string[] assemblyReferences = new string[5] { "System.dll", "System.Web.Services.dll", "System.Web.dll", "System.Xml.dll", "System.Data.dll" }; CompilerParameters parms = new CompilerParameters(assemblyReferences); CompilerResults results = provider1.CompileAssemblyFromDom(parms, unit1); //-Check For Errors if (results.Errors.Count > 0) { StringBuilder sb = new StringBuilder(); foreach (CompilerError oops in results.Errors) { sb.AppendLine("========Compiler error============"); sb.AppendLine(oops.ErrorText); } throw new System.ApplicationException("Compile Error Occured calling webservice. " + sb.ToString()); } //--Finally, Invoke the web service method Type foundType = null; Type[] types = results.CompiledAssembly.GetTypes(); foreach (Type type in types) { if (type.BaseType == typeof(System.Web.Services.Protocols.SoapHttpClientProtocol)) { Console.WriteLine(type.ToString()); foundType = type; } } object wsvcClass = results.CompiledAssembly.CreateInstance(foundType.ToString()); MethodInfo mi = wsvcClass.GetType().GetMethod(methodName); return mi.Invoke(wsvcClass, args); } else { return null; } } } I cant find anything static being done by me. any help is greatly appreciated. Regards, Phani Kumar PV

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• Dojo extending dojo.dnd.Source, move not happening. Ideas?

  - by Soulhuntre

  Hey all, Ok... I have a simple dojo page with the bare essentials. Three UL's with some LI's in them. The idea si to allow drag-n-drop among them but if any UL goes empty due to the last item being dragged out, I will put up a message to the user to gie them some instructions. In order to do that, I wanted to extend the dojo.dnd.Source dijit and add some intelligence. It seemed easy enough. To keep things simple (I am loading Dojo from a CDN) I am simply declating my extension as opposed to doing full on module load. The declaration function is here... function declare_mockupSmartDndUl(){ dojo.require("dojo.dnd.Source"); dojo.provide("mockup.SmartDndUl"); dojo.declare("mockup.SmartDndUl", dojo.dnd.Source, { markupFactory: function(params, node){ //params._skipStartup = true; return new mockup.SmartDndUl(node, params); }, onDndDrop: function(source, nodes, copy){ console.debug('onDndDrop!'); if(this == source){ // reordering items console.debug('moving items from us'); // DO SOMETHING HERE }else{ // moving items to us console.debug('moving items to us'); // DO SOMETHING HERE } console.debug('this = ' + this ); console.debug('source = ' + source ); console.debug('nodes = ' + nodes); console.debug('copy = ' + copy); return dojo.dnd.Source.prototype.onDndDrop.call(this, source, nodes, copy); } }); } I have a init function to use this to decorate the lists... dojo.addOnLoad(function(){ declare_mockupSmartDndUl(); if(dojo.byId('list1')){ //new mockup.SmartDndUl(dojo.byId('list1')); new dojo.dnd.Source(dojo.byId('list1')); } if(dojo.byId('list2')){ new mockup.SmartDndUl(dojo.byId('list2')); //new dojo.dnd.Source(dojo.byId('list2')); } if(dojo.byId('list3')){ new mockup.SmartDndUl(dojo.byId('list3')); //new dojo.dnd.Source(dojo.byId('list3')); } }); It is fine as far as it goes, you will notice I left "list1" as a standard dojo dnd source for testing. The problem is this - list1 will happily accept items from lists 2 & 3 who will move or copy as apprriate. However lists 2 & 3 refuce to accept items from list1. It is as if the DND operation is being cancelled, but the debugger does show the dojo.dnd.Source.prototype.onDndDrop.call happening, and the paramaters do look ok to me. Now, the documentation here is really weak, so the example I took some of this from may be way out of date (I am using 1.4). Can anyone fill me in on what might be the issue with my extension dijit? Thanks!

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• Trouble with OpenLayers Styles.

  - by Jenny

  So, tired of always seeing the bright orange default regular polygons, I'm trying to learn to style OpenLayers. I've had some success with: var layer_style = OpenLayers.Util.extend({},OpenLayers.Feature.Vector.style['default']); layer_style.fillColor = "#000000"; layer_style.strokeColor = "#000000"; polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer"); polygonLayer.style = layer_style; But sine I am drawing my polygons with DrawFeature, my style only takes effect once I've finished drawing, and seeing it snap from bright orange to grey is sort of disconcerting. So, I learned about temporary styles, and tried: var layer_style = new OpenLayers.Style({"default": {fillColor: "#000000"}, "temporary": {fillColor: "#000000"}}) polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer"); polygonLayer.style = layer_style; This got me a still orange square--until I stopped drawing, when it snapped into completely opaque black. I figured maybe I had to explicitly set the fillOpacity...no dice. Even when I changed both fill colors to be pink and blue, respectively, I still saw only orange and opaque black. I've tried messing with StyleMaps, since I read that if you only add one style to a style map, it uses the default one for everything, including the temporary style. var layer_style = OpenLayers.Util.extend({}, OpenLayers.Feature.Vector.style['default']); var style_map = new OpenLayers.StyleMap(layer_style); polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer"); polygonLayer.style = style_map; That got me the black opaque square, too. (Even though that layer style works when not given to a map). Passing the map to the layer itself like so: polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer", style_map); Didn't get me anything at all. Orange all the way, even after drawn. polygonLayer = new OpenLayers.Layer.Vector("PolygonLayer", {styleMap: style_map}); Is a lot more succesful: Orange while drawing, translucent black with black outline when drawn. Just like when I didn't use a map. Problem is, still no temporary... So, I tried initializing my map this way: var style_map = new OpenLayers.StyleMap({"default": layer_style, "temporary": layer_style}); No opaque square, but no dice for the temporary, either... Still orange snapping to black transparent. Even if I make a new Style (layer_style2), and set temporary to that, still no luck. And no luck with setting "select" style, either. What am I doing wrong? Temporary IS for styling things that are currently being sketched, correct? Is there some other way specific to the drawFeature Controller? Edit: setting extendDefault to be true doesn't seem to help, either... var style_map = new OpenLayers.StyleMap({"default": layer_style, "temporary": layer_style}, {"extendDefault": "true"});

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• Understanding the memory consumption on iPhone

  - by zoul

  Hello! I am working on a 2D iPhone game using OpenGL ES and I keep hitting the 24 MB memory limit – my application keeps crashing with the error code 101. I tried real hard to find where the memory goes, but the numbers in Instruments are still much bigger than what I would expect. I ran the application with the Memory Monitor, Object Alloc, Leaks and OpenGL ES instruments. When the application gets loaded, free physical memory drops from 37 MB to 23 MB, the Object Alloc settles around 7 MB, Leaks show two or three leaks a few bytes in size, the Gart Object Size is about 5 MB and Memory Monitor says the application takes up about 14 MB of real memory. I am perplexed as where did the memory go – when I dig into the Object Allocations, most of the memory is in the textures, exactly as I would expect. But both my own texture allocation counter and the Gart Object Size agree that the textures should take up somewhere around 5 MB. I am not aware of allocating anything else that would be worth mentioning, and the Object Alloc agrees. Where does the memory go? (I would be glad to supply more details if this is not enough.) Update: I really tried to find where I could allocate so much memory, but with no results. What drives me wild is the difference between the Object Allocations (~7 MB) and real memory usage as shown by Memory Monitor (~14 MB). Even if there were huge leaks or huge chunks of memory I forget about, the should still show up in the Object Allocations, shouldn’t they? I’ve already tried the usual suspects, ie. the UIImage with its caching, but that did not help. Is there a way to track memory usage “debugger-style”, line by line, watching each statement’s impact on memory usage? What I have found so far: I really am using that much memory. It is not easy to measure the real memory consumption, but after a lot of counting I think the memory consumption is really that high. My fault. I found no easy way to measure the memory used. The Memory Monitor numbers are accurate (these are the numbers that really matter), but the Memory Monitor can’t tell you where exactly the memory goes. The Object Alloc tool is almost useless for tracking the real memory usage. When I create a texture, the allocated memory counter goes up for a while (reading the texture into the memory), then drops (passing the texture data to OpenGL, freeing). This is OK, but does not always happen – sometimes the memory usage stays high even after the texture has been passed on to OpenGL and freed from “my” memory. This means that the total amount of memory allocated as shown by the Object Alloc tool is smaller than the real total memory consumption, but bigger than the real consumption minus textures (real – textures < object alloc < real). Go figure. I misread the Programming Guide. The memory limit of 24 MB applies to textures and surfaces, not the whole application. The actual red line lies a bit further, but I could not find any hard numbers. The consensus is that 25–30 MB is the ceiling. When the system gets short on memory, it starts sending the memory warning. I have almost nothing to free, but other applications do release some memory back to the system, especially Safari (which seems to be caching the websites). When the free memory as shown in the Memory Monitor goes zero, the system starts killing. I had to bite the bullet and rewrite some parts of the code to be more efficient on memory, but I am probably still pushing it. I

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• Odd tcp deadlock under windows

  - by John Robertson

  We are moving large amounts of data on a LAN and it has to happen very rapidly and reliably. Currently we use windows TCP as implemented in C++. Using large (synchronous) sends moves the data much faster than a bunch of smaller (synchronous) sends but will frequently deadlock for large gaps of time (.15 seconds) causing the overall transfer rate to plummet. This deadlock happens in very particular circumstances which makes me believe it should be preventable altogether. More importantly if we don't really know the cause we don't really know it won't happen some time with smaller sends anyway. Can anyone explain this deadlock? Deadlock description (OK, zombie-locked, it isn't dead, but for .15 or so seconds it stops, then starts again) The receiving side sends an ACK. The sending side sends a packet containing the end of a message (push flag is set) The call to socket.recv takes about .15 seconds(!) to return About the time the call returns an ACK is sent by the receiving side The the next packet from the sender is finally sent (why is it waiting? the tcp window is plenty big) The odd thing about (3) is that typically that call doesn't take much time at all and receives exactly the same amount of data. On a 2Ghz machine that's 300 million instructions worth of time. I am assuming the call doesn't (heaven forbid) wait for the received data to be acked before it returns, so the ack must be waiting for the call to return, or both must be delayed by something else. The problem NEVER happens when there is a second packet of data (part of the same message) arriving between 1 and 2. That part very clearly makes it sound like it has to do with the fact that windows TCP will not send back a no-data ACK until either a second packet arrives or a 200ms timer expires. However the delay is less than 200 ms (its more like 150 ms). The third unseemly character (and to my mind the real culprit) is (5). Send is definitely being called well before that .15 seconds is up, but the data NEVER hits the wire before that ack returns. That is the most bizarre part of this deadlock to me. Its not a tcp blockage because the TCP window is plenty big since we set SO_RCVBUF to something like 500*1460 (which is still under a meg). The data is coming in very fast (basically there is a loop spinning out data via send) so the buffer should fill almost immediately. According to msdn the buffer being full and at least one pending send should cause the data to be sent (though in another place it mentions that there various "heuristics" used in deciding when a send hits the wire). Anway, why the sender doesn't actually send more data during that .15 second pause is the most bizarre part to me. The information above was captured on the receiving side via wireshark (except of course the socket.recv return times which were logged in a text file). We tried changing the send buffer to zero and turning off Nagle on the sender (yes, I know Nagle is about not sending small packets - but we tried turning Nagle off in case that was part of the unstated "heuristics" affecting whether the message would be posted to the wire. Technically microsoft's Nagle is that a small packet isn't sent if the buffer is full and there is an outstanding ACK, so it seemed like a possibility).

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• ListView item won't extend width to fill_parent

  - by slybloty

  I have a custom ViewGroup that inflates a ListView from an xml layout. The list item layout is inflated from another xml file. All of the views are set to fill_parent. The ListView fills its parent, but the ListView items don't. I've tried putting the ListView in a LinearLayout and assigning weight to it. Tried RelativeLayout as well. Also, I've built the ListView programmaticaly, without using the xml layout. Even changed the LayoutParams before adding the view to the ViewGroup. I've also taken in consideration these posts as well: Width of clickable area in ListView w/ onListItemClick, In Android, how can I set a ListView item's height and width?, Android Listview width prob. Any ideas to why the items don't extend to fill width? And how to extend them? MyViewGroup class: public class MyViewGroup extends ViewGroup { public MyViewGroup(Context context, AttributeSet attrs) { super(context, attrs); generateMyViewGroup(); } private void generateMyViewGroup() { ListView main = (ListView) View.inflate(getContext(), R.layout.layout_main, null); main.setAdapter(new MyAdapter(getContext())); this.addView(main); } @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { this.getChildAt(0).layout(l, t, r, b); } } ListView xml layout: <?xml version="1.0" encoding="utf-8"?> <ListView xmlns:android="http://schemas.android.com/apk/res/android" android:id="@android:id/list" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginRight="3dp" android:background="#77000000" android:cacheColorHint="#00000000" android:divider="#00000000" android:dividerHeight="0dp" android:drawSelectorOnTop="false" android:scrollbars="vertical" > </ListView> ListView item layout: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/layout_main_category" android:layout_width="fill_parent" android:layout_height="wrap_content" android:background="@color/mainBackground" android:gravity="fill_horizontal|center_vertical" android:orientation="vertical" > <TextView android:id="@+id/main_category" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginLeft="8dp" android:layout_marginRight="8dp" android:paddingBottom="7dp" android:paddingLeft="20dp" android:paddingRight="5dp" android:paddingTop="20dp" android:text="test" android:textColor="@color/mainCategory" android:textSize="15sp" android:textStyle="bold" /> </LinearLayout>

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• How do you automap List<float> or float[] with Fluent NHibernate?

  - by Tom Bushell

  Having successfully gotten a sample program working, I'm now starting to do Real Work with Fluent NHibernate - trying to use Automapping on my project's class heirarchy. It's a scientific instrumentation application, and the classes I'm mapping have several properties that are arrays of floats e.g. private float[] _rawY; public virtual float[] RawY { get { return _rawY; } set { _rawY = value; } } These arrays can contain a maximum of 500 values. I didn't expect Automapping to work on arrays, but tried it anyway, with some success at first. Each array was auto mapped to a BLOB (using SQLite), which seemed like a viable solution. The first problem came when I tried to call SaveOrUpdate on the objects containing the arrays - I got "No persister for float[]" exceptions. So my next thought was to convert all my arrays into ILists e.g. public virtual IList<float> RawY { get; set; } But now I get: NHibernate.MappingException: Association references unmapped class: System.Single Since Automapping can deal with lists of complex objects, it never occured to me it would not be able to map lists of basic types. But after doing some Googling for a solution, this seems to be the case. Some people seem to have solved the problem, but the sample code I saw requires more knowledge of NHibernate than I have right now - I didn't understand it. Questions: 1. How can I make this work with Automapping? 2. Also, is it better to use arrays or lists for this application? I can modify my app to use either if necessary (though I prefer lists). Edit: I've studied the code in Mapping Collection of Strings, and I see there is test code in the source that sets up an IList of strings, e.g. public virtual IList<string> ListOfSimpleChildren { get; set; } [Test] public void CanSetAsElement() { new MappingTester<OneToManyTarget>() .ForMapping(m => m.HasMany(x => x.ListOfSimpleChildren).Element("columnName")) .Element("class/bag/element").Exists(); } so this must be possible using pure Automapping, but I've had zero luck getting anything to work, probably because I don't have the requisite knowlege of manually mapping with NHibernate. Starting to think I'm going to have to hack this (by encoding the array of floats as a single string, or creating a class that contains a single float which I then aggregate into my lists), unless someone can tell me how to do it properly. End Edit Here's my CreateSessionFactory method, if that helps formulate a reply... private static ISessionFactory CreateSessionFactory() { ISessionFactory sessionFactory = null; const string autoMapExportDir = "AutoMapExport"; if( !Directory.Exists(autoMapExportDir) ) Directory.CreateDirectory(autoMapExportDir); try { var autoPersistenceModel = AutoMap.AssemblyOf<DlsAppOverlordExportRunData>() .Where(t => t.Namespace == "DlsAppAutomapped") .Conventions.Add( DefaultCascade.All() ) ; sessionFactory = Fluently.Configure() .Database(SQLiteConfiguration.Standard .UsingFile(DbFile) .ShowSql() ) .Mappings(m => m.AutoMappings.Add(autoPersistenceModel) .ExportTo(autoMapExportDir) ) .ExposeConfiguration(BuildSchema) .BuildSessionFactory() ; } catch (Exception e) { Debug.WriteLine(e); } return sessionFactory; }

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• Client-side templating frameworks to streamline using jQuery with REST/JSON

  - by Tauren

  I'm starting to migrate some html generation tasks from a server-side framework to the client. I'm using jQuery on the client. My goal is to get JSON data via a REST api and use this data to populate HTML into the page. Right now, when a user on my site clicks a link to My Projects, the server generates HTML like this: <dl> <dt>Clean Toilet</dt> <dd>Get off your butt and clean this filth!</dd> <dt>Clean Car</dt> <dd>I think there's something growing in there...</dd> <dt>Replace Puked on Baby Sheets</dt> </dl> I'm changing this so that clicking My Projects will now do a GET request that returns something like this: [ { "name":"Clean Car", "description":"I think there's something growing in there..." }, { "name":"Clean Toilets", "description":"Get off your butt and clean this filth!" }, { "name":"Replace Puked on Baby Sheets" } ] I can certainly write custom jQuery code to take that JSON and generate the HTML from it. This is not my question, and I don't need advice on how to do that. What I'd like to do is completely separate the presentation and layout from the logic (jquery code). I don't want to be creating DL, DT, and DD elements via jQuery code. I'd rather use some sort of HTML templates that I can fill the data in to. These templates could simply be HTML snippets that are hidden in the page that the application was loaded from. Or they could be dynamically loaded from the server (to support user specific layouts, i18n, etc.). They could be displayed a single time, as well as allow looping and repeating. Perhaps it should support sub-templates, if/then/else, and so forth. I have LOTS of lists and content on my site that are presented in many different ways. I'm looking to create a simple and consistent way to generate and display content without creating custom jQuery code for every different feature on my site. To me, this means I need to find or build a small framework on top of jQuery (probably as a plugin) that meets these requirements. The only sort of framework that I've found that is anything like this is jTemplates. I don't know how good it is, as I haven't used it yet. At first glance, I'm not thrilled by it's template syntax. Anyone know of other frameworks or plugins that I should look into? Any blog posts or other resources out there that discuss doing this sort of thing? I just want to make sure that I've surveyed everything out there before building it myself. Thanks!

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• .NET RegEx "Memory Leak" investigation

  - by Kevin Pullin

  I recently looked into some .NET "memory leaks" (i.e. unexpected, lingering GC rooted objects) in a WinForms app. After loading and then closing a huge report, the memory usage did not drop as expected even after a couple of gen2 collections. Assuming that the reporting control was being kept alive by a stray event handler I cracked open WinDbg to see what was happening... Using WinDbg, the !dumpheap -stat command reported a large amount of memory was consumed by string instances. Further refining this down with the !dumpheap -type System.String command I found the culprit, a 90MB string used for the report, at address 03be7930. The last step was to invoke !gcroot 03be7930 to see which object(s) were keeping it alive. My expectations were incorrect - it was not an unhooked event handler hanging onto the reporting control (and report string), but instead it was held on by a System.Text.RegularExpressions.RegexInterpreter instance, which itself is a descendant of a System.Text.RegularExpressions.CachedCodeEntry. Now, the caching of Regexs is (somewhat) common knowledge as this helps to reduce the overhead of having to recompile the Regex each time it is used. But what then does this have to do with keeping my string alive? Based on analysis using Reflector, it turns out that the input string is stored in the RegexInterpreter whenever a Regex method is called. The RegexInterpreter holds onto this string reference until a new string is fed into it by a subsequent Regex method invocation. I'd expect similar behaviour by hanging onto Regex.Match instances and perhaps others. The chain is something like this: Regex.Split, Regex.Match, Regex.Replace, etc Regex.Run RegexScanner.Scan (RegexScanner is the base class, RegexInterpreter is the subclass described above). The offending Regex is only used for reporting, rarely used, and therefore unlikely to be used again to clear out the existing report string. And even if the Regex was used at a later point, it would probably be processing another large report. This is a relatively significant problem and just plain feels dirty. All that said, I found a few options on how to resolve, or at least work around, this scenario. I'll let the community respond first and if no takers come forward I will fill in any gaps in a day or two.

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• Switching DataSources in ReportViewer in WinForms

  - by Mike Wills

  I have created a winform for the users to view view the many reports I am creating for them. I have a drop down list with the report name which triggers the appropriate fields to display the parameters. Once those are filled, they press Submit and the report appears. This works the first time they hit the screen. They can change the parameters and the ReportViewer works fine. Change to a different report, and the I get the following ReportViewer error: An error occurred during local report processing. An error has occurred during the report processing. A data source instance has not been supplied for the data source "CgTempData_BusMaintenance". As far as the process I use: I set reportName (string) the physical RDLC name. I set the dataSource (string) as the DataSource Name I fill a generic DataTable with the data for the report to run from. Make the ReportViewer visible Set the LocalReport.ReportPath = "Reports\\" = reportName; Clear the LocalReport.DataSources.Clear() Add the new LocalReport.DataSources.Add(new ReportDataSource(dataSource, dt)); RefreshReport() on the ReportViewer. Here is the portion of the code that setups up and displays the ReportViewer: /// <summary> /// Builds the report. /// </summary> private void BuildReport() { DataTable dt = null; ReportingCG rcg = new ReportingCG(); if (reportName == "GasUsedReport.rdlc") { dataSource = "CgTempData_FuelLog"; CgTempData.FuelLogDataTable DtFuelLog = rcg.BuildFuelUsedTable(fromDate, toDate); dt = DtFuelLog; } else if (reportName == "InventoryCost.rdlc") { CgTempData.InventoryUsedDataTable DtInventory; dataSource = "CgTempData_InventoryUsed"; DtInventory = rcg.BuildInventoryUsedTable(fromDate, toDate); dt = DtInventory; } else if (reportName == "VehicleMasterList.rdlc") { dataSource = "CgTempData_VehicleMaster"; CgTempData.VehicleMasterDataTable DtVehicleMaster = rcg.BuildVehicleMasterTable(); dt = DtVehicleMaster; } else if (reportName == "BusCosts.rdlc") { dataSource = "CgTempData_BusMaintenance"; dt = rcg.BuildBusCostsTable(fromDate, toDate); } // Setup the DataSource this.reportViewer1.Visible = true; this.reportViewer1.LocalReport.ReportPath = "Reports\\" + reportName; this.reportViewer1.LocalReport.DataSources.Clear(); this.reportViewer1.LocalReport.DataSources.Add(new ReportDataSource(dataSource, dt)); this.reportViewer1.RefreshReport(); } Any ideas how to remove all of the old remaining data? Do I dispose the object and recreate it?

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• iPhone MailComposer class UIViewController dismissModalViewControllerAnimated issues

  - by Scott Pendleton

  I created a class to launch the MailComposer so that my iPhone app would only have one place to go when generating various kinds of e-mail: some with attachments, some not. Some with pre-filled addresses, some not. I didn't want my class implement UIViewController, but it has to so it can be the delegate for the MailComposer. Otherwise, the view controllers that call my class would themselves have to be delegates for the MailComposer, which defeats the purpose. The downside of having my class be a view controller is that it has to load to the screen before it can modally bring up the MailComposer. Unfortunately, view controllers can't be transparent. The effect is, whatever is on screen gets covered by a solid white view controller for a moment before the MailComposer appears. I could maybe live with that, but not this: after the MailComposer goes away, I'm left with my blank view controller occupying the screen. I ought to be able to get rid of it from within itself by calling this: [self.parentViewController dismissModalViewControllerAnimated:NO]; But that dies a horrible death: "Loading 43365 stack frames..." Has my class -- a UIViewController that pre-fills and then launches a MailComposer -- lost track of its parentViewController? It isn't nil, because I've tested for that. As launched from within the current view controller... // My class is called Email. Email *oEmail = [[[Email alloc] init] retain]; // Red, to remind myself that I'd like to someday learn to make it transparent. oEmail.view.backgroundColor = [UIColor redColor]; // Pre-fill whatever fields you want, and specify attachments. oEmail.EmailSubject = @"I am truly stumped"; // This has to go on screen first. [self presentModalViewController:oEmail animated:NO]; // Then this can happen, which brings up the MailComposer. [oEmail f_SendEmail]; // Commenting out the next line didn't help, so I turned it back on. [oEmail release]; Inside the class, you need the mailComposeController:didFinishWithResult:error: method to make the MailComposer go away, and for that to happen, the class has to be the MFMailComposeViewControllerDelegate. Here's what happens in there: // This gets rid of the mail composer. [self dismissModalViewControllerAnimated:YES]; // This never fails to get rid of other modal view controllers when called // from within those controllers, but boy does it not work here. [self.parentViewController dismissModalViewControllerAnimated:NO]; If you can help me, I will be truly thankful!

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• WCF endpoint exception

  - by Lijo

  Hi Team, I am just trying with various WCF(in .Net 3.0) scenarios. I am using self hosting. I am getting an exception as "Service 'MyServiceLibrary.NameDecorator' has zero application (non-infrastructure) endpoints. This might be because no configuration file was found for your application, or because no service element matching the service name could be found in the configuration file, or because no endpoints were defined in the service element." I have a config file as follows (which has an endpoint) <?xml version="1.0" encoding="utf-8" ?> <configuration> <system.serviceModel> <services> <service name="Lijo.Samples.NameDecorator" behaviorConfiguration="WeatherServiceBehavior"> <host> <baseAddresses> <add baseAddress="http://localhost:8010/ServiceModelSamples/FreeServiceWorld"/> </baseAddresses> </host> <endpoint address="" binding="wsHttpBinding" contract="Lijo.Samples.IElementaryService" /> <endpoint address="mex" binding="mexHttpBinding" contract="IMetadataExchange" /> </service> </services> <behaviors> <serviceBehaviors> <behavior name="WeatherServiceBehavior"> <serviceMetadata httpGetEnabled="true"/> <serviceDebug includeExceptionDetailInFaults="False"/> </behavior> </serviceBehaviors> </behaviors> </system.serviceModel> </configuration> And a Host as using System.ServiceModel; using System.ServiceModel.Dispatcher; using System.ServiceModel.Channels; using System.ServiceModel.Description; using System.Runtime.Serialization; namespace MySelfHostConsoleApp { class Program { static void Main(string[] args) { System.ServiceModel.ServiceHost myHost = new ServiceHost(typeof(MyServiceLibrary.NameDecorator)); myHost.Open(); Console.ReadLine(); } } } My Service is as follows using System.ServiceModel; using System.Runtime.Serialization; namespace MyServiceLibrary { [ServiceContract(Namespace = "http://Lijo.Samples")] public interface IElementaryService { [OperationContract] CompanyLogo GetLogo(); } public class NameDecorator : IElementaryService { public CompanyLogo GetLogo() { CircleType cirlce = new CircleType(); CompanyLogo logo = new CompanyLogo(cirlce); return logo; } } [DataContract] public abstract class IShape { public abstract string SelfExplain(); } [DataContract(Name = "Circle")] public class CircleType : IShape { public override string SelfExplain() { return "I am a Circle"; } } [DataContract(Name = "Triangle")] public class TriangleType : IShape { public override string SelfExplain() { return "I am a Triangle"; } } [DataContract] [KnownType(typeof(CircleType))] [KnownType(typeof(TriangleType))] public class CompanyLogo { private IShape m_shapeOfLogo; [DataMember] public IShape ShapeOfLogo { get { return m_shapeOfLogo; } set { m_shapeOfLogo = value; } } public CompanyLogo(IShape shape) { m_shapeOfLogo = shape; } } } Could you please help me to understand what I am missing here? Thanks Lijo

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• Apple push Notification Feedback service Not working

  - by Yassmeen

  Hi, I am developing an iPhone App that uses Apple Push Notifications. On the iPhone side everything is fine, on the server side I have a problem. Notifications are sent correctly however when I try to query the feedback service to obtain a list of devices from which the App has been uninstalled, I always get zero results. I know that I should obtain one result as the App has been uninstalled from one of my test devices. After 24 hours and more I still have no results from the feedback service.. Any ideas? Does anybody know how long it takes for the feedback service to recognize that my App has been uninstalled from my test device? Note: I have another push notification applications on the device so I know that my app is not the only app. The code - C#: public static string CheckFeedbackService(string certaName, string hostName) { SYLogger.Log("Check Feedback Service Started"); ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(ValidateServerCertificate); // Create a TCP socket connection to the Apple server on port 2196 TcpClient tcpClientF = null; SslStream sslStreamF = null; string result = string.Empty; //Contect to APNS& Add the Apple cert to our collection X509Certificate2Collection certs = new X509Certificate2Collection { GetServerCert(certaName) }; //Set up byte[] buffer = new byte[38]; int recd = 0; DateTime minTimestamp = DateTime.Now.AddYears(-1); // Create a TCP socket connection to the Apple server on port 2196 try { using (tcpClientF = new TcpClient(hostName, 2196)) { SYLogger.Log("Client Connected ::" + tcpClientF.Connected); // Create a new SSL stream over the connection sslStreamF = new SslStream(tcpClientF.GetStream(), true,ValidateServerCertificate); // Authenticate using the Apple cert sslStreamF.AuthenticateAsClient(hostName, certs, SslProtocols.Default, false); SYLogger.Log("Stream Readable ::" + sslStreamF.CanRead); SYLogger.Log("Host Name ::"+hostName); SYLogger.Log("Cert Name ::" + certs[0].FriendlyName); if (sslStreamF != null) { SYLogger.Log("Connection Started"); //Get the first feedback recd = sslStreamF.Read(buffer, 0, buffer.Length); SYLogger.Log("Buffer length ::" + recd); //Continue while we have results and are not disposing while (recd > 0) { SYLogger.Log("Reading Started"); //Get our seconds since 1970 ? byte[] bSeconds = new byte[4]; byte[] bDeviceToken = new byte[32]; Array.Copy(buffer, 0, bSeconds, 0, 4); //Check endianness if (BitConverter.IsLittleEndian) Array.Reverse(bSeconds); int tSeconds = BitConverter.ToInt32(bSeconds, 0); //Add seconds since 1970 to that date, in UTC and then get it locally var Timestamp = new DateTime(1970, 1, 1, 0, 0, 0, DateTimeKind.Utc).AddSeconds(tSeconds).ToLocalTime(); //Now copy out the device token Array.Copy(buffer, 6, bDeviceToken, 0, 32); string deviceToken = BitConverter.ToString(bDeviceToken).Replace("-", "").ToLower().Trim(); //Make sure we have a good feedback tuple if (deviceToken.Length == 64 && Timestamp > minTimestamp) { SYLogger.Log("Feedback " + deviceToken); result = deviceToken; } //Clear array to reuse it Array.Clear(buffer, 0, buffer.Length); //Read the next feedback recd = sslStreamF.Read(buffer, 0, buffer.Length); } SYLogger.Log("Reading Ended"); } } } catch (Exception e) { SYLogger.Log("Authentication failed - closing the connection::" + e); return "NOAUTH"; } finally { // The client stream will be closed with the sslStream // because we specified this behavior when creating the sslStream. if (sslStreamF != null) sslStreamF.Close(); if (tcpClientF != null) tcpClientF.Close(); //Clear array on error Array.Clear(buffer, 0, buffer.Length); } SYLogger.Log("Feedback ended "); return result; }

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• Android Canvas.drawString display problem

  - by Arkaha

  Hello everyone! I encounter this problem when displaying text on SurfaceView, some chars can climb up on others, code is here: private static void fakeDraw(Canvas c) { Paint mPaint = new Paint(); int color = 0xff000000; mPaint.setColor(color); mPaint.setStrokeWidth(2); mPaint.setStyle(Style.FILL); mPaint.setAntiAlias(true); FontMetricsInt fm = mPaint.getFontMetricsInt(); int fh = Math.abs(fm.top); int left = 0; int top = 100; Rect smallClip = new Rect(left, top-fh, left + 200, top + 30); Rect bigClip = new Rect(0, 0, getW(), getH()); c.drawRect(bigClip, mPaint); String text1 = "Evi"; String text2 = ">>"; String text3 = "Tom"; color = 0xff303030; mPaint.setColor(color); c.drawRect(smallClip, mPaint); color = 0xffffffff; mPaint.setColor(color); c.drawText(text1, left, top, mPaint); Rect bounds = new Rect(); mPaint.getTextBounds(text1, 0, text1.length(), bounds); left += bounds.width(); c.drawText(text2, left, top, mPaint); left -= bounds.width(); top += 12; c.drawText(text3, left, top, mPaint); mPaint.getTextBounds(text3, 0, text3.length(), bounds); left += bounds.width(); c.drawText(text2, left, top, mPaint); } In the case of a second text Tom all displayed correctly, but the first text Evi not. The problem is that the chars draws in Evi draw space(last char "i")!! It is possible to see if you zoom the picture, what am I doing wrong and how to fix this? screen shot can be found here:

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• c# SendMessage and Skype woes

  - by Xcelled194

  I'm trying to create an add-on to Skype with C#. I don't want to use Skype4COM, as I'd like the experience with messages and such. Unfortunately, the messages are tripping me up. I've got the pumps and such set up. They all work, and my app successfully sends the "APIDiscover" message to Skype, gets a "PendingAuth" response and then the "AttachSuccess" message. However, when I try to send "ping" to Skype (to which it should reply "pong") nothing happens. The return code from SendMessage is 0 but Marshall.GetLastWin32Error is 1400 (Invalid handle). The handle was returned with the AttachSuccess method. The equivalent C++ code does work, so I'm at a loss. First is the C++ code I'm using as a guide: Here's the (cut down) message pump. You can ignore everything but where I put the //<---- static LRESULT APIENTRY SkypeAPITest_Windows_WindowProc( HWND hWindow, UINT uiMessage, WPARAM uiParam, LPARAM ulParam) { LRESULT lReturnCode; bool fIssueDefProc; lReturnCode=0; fIssueDefProc=false; switch(uiMessage) { case WM_COPYDATA: if( hGlobal_SkypeAPIWindowHandle==(HWND)uiParam ) { PCOPYDATASTRUCT poCopyData=(PCOPYDATASTRUCT)ulParam; printf( "Message from Skype(%u): %.*s\n", poCopyData->dwData, poCopyData->cbData, poCopyData->lpData); lReturnCode=1; } break; default: if( uiMessage==uiGlobal_MsgID_SkypeControlAPIAttach ) { switch(ulParam) { case SKYPECONTROLAPI_ATTACH_SUCCESS: printf("!!! Connected; to terminate issue #disconnect\n"); hGlobal_SkypeAPIWindowHandle=(HWND)uiParam;//<---- Right here is where we receive the handle from Skype. break; } if( fIssueDefProc ) lReturnCode=DefWindowProc( hWindow, uiMessage, uiParam, ulParam); return(lReturnCode); } and this is the (again dumbed down) "sending message" code void __cdecl Global_InputProcessingThread(void *) { static char acInputRow[1024]; bool fProcessed; if( SendMessageTimeout( HWND_BROADCAST, uiGlobal_MsgID_SkypeControlAPIDiscover, (WPARAM)hInit_MainWindowHandle, 0, SMTO_ABORTIFHUNG, 1000, NULL)!=0 ) { while(Global_Console_ReadRow( acInputRow, sizeof(acInputRow)-1)) { if( fProcessed==false && hGlobal_SkypeAPIWindowHandle!=NULL ) { COPYDATASTRUCT oCopyData; // send command to skype oCopyData.dwData=0; oCopyData.lpData=acInputRow; oCopyData.cbData=strlen(acInputRow)+1; if( oCopyData.cbData!=1 ) { if( SendMessage( hGlobal_SkypeAPIWindowHandle, WM_COPYDATA, (WPARAM)hInit_MainWindowHandle, (LPARAM)&oCopyData)==FALSE ) { hGlobal_SkypeAPIWindowHandle=NULL; printf("!!! Disconnected\n"); } } } } } SendMessage( hInit_MainWindowHandle, WM_CLOSE, 0, 0); SetEvent(hGlobal_ThreadShutdownEvent); fGlobal_ThreadRunning=false; } And now here's my C# public bool PreFilterMessage(ref Message m) { Console.WriteLine(m.ToString()); if (m.Msg == WM_COPYDATA && SkypeAPIWindowHandle == m.WParam) { SkypeMessage(m); return true; } if (m.Msg == MsgApiAttach) { switch (m.LParam.ToInt32()) { case (int)SkypeControlAPIAttach.SUCCESS: SkypeAPIWindowHandle = m.WParam; //Here's where we set the Skype Handle AttachSuccess(m); return true; } } return false; //Defer all other messages } And here is my DLL import and Sending code [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = false)] static extern IntPtr SendMessageA(IntPtr hWnd, UInt32 Msg, IntPtr wParam, ref MsgHelper.COPYDATASTRUCT lParam); public static void Command(string c) { if (c.Last() != '\0') c += "\0"; //Make string null terminated Console.WriteLine(); MsgHelper.COPYDATASTRUCT cda = new MsgHelper.COPYDATASTRUCT(); cda.dwData = new IntPtr(0); cda.lpData = c; cda.cbData = c.Length + 1; Marshal.GetLastWin32Error(); //Clear last error Console.WriteLine(SendMessageA(mHelper.SkypeAPIWindowHandle, MsgHelper.WM_COPYDATA, IntPtr.Zero, ref cda)); Console.WriteLine(Marshal.GetLastWin32Error()); } COPYDATASTRUCT is: public struct COPYDATASTRUCT { public IntPtr dwData; public int cbData; [MarshalAs(UnmanagedType.LPStr)] public string lpData; } I think that's everything. Let me know if I forgot something. Any ideas why I'm getting the 1400?

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