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  • Setting the database connection when using a TransactionScope

    - by eych
    Does the database connection have to be set inside a TransactionScope? Or can I set it in the ctor and then have instance methods create up a TransactionScope? EDIT: e.g. Public Sub New() Dim conn = new SqlConnection(...connection string) Public Sub SomeClassMethod() using ts as new TransactionScope //conn has already been initialized //so, here you can set commands, ExecuteDataSet, etc. vs Public Sub New() //nothing here Public Sub SomeClassMethod() using ts as new TransactionScope conn = new SqlConnection(...connection string) set commands, ExecuteDataSet, etc. the question is do you need to create the connection to the database after you've created a TransactionScope or can it be done before?

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  • Format date in hql query

    - by user115520
    hi all, i want to format date to string in hql select, for example i have purchasing data with transaction date in it: class Purchase { private Date datePurchase } and i want to select date in a certain format, for example yyyyMMdd, can i do that in hql? actually i can iterate through all purchase data returned by query, and start to format the date using SimpleDateFormat, but i don't want do that, i want to do it in hql, is it posible? fyi, i just want to return the id and date string only, not all Purchase field. thak you all for any help.

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  • Combine NotifyIcon and ToolTip

    - by Greycrow
    I have been working with NotifyIcon in order to show an icon in the taskbar. This program has no Windows Form. I perhaps could create one and make it invisible but I was hoping to avoid it. The ToolTip functions attached to NotifyIcon are somewhat lacking, and one of the gurus here suggested I look at the ToolTip functionality. It is possible to attach ToolTip to a form. Is is possible to attach it to just the NotifyIcon? I'm trying do this: NotifyIcon CTicon = new NotifyIcon(); ToolTip toolTip = new ToolTip(); toolTip.SetToolTip(CTicon, "Test"); And I get the error "cannot convert from 'System.Windows.Forms.NotifyIcon' to 'System.Windows.Forms.Control'. Is there a way to convert? I also tried: toolTip.SetToolTip(CTicon.Container, "Test"); but a container is apparently not a valid control either. I apologize for my total lack of understanding of how this may or may not work. Thanks in advance.

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  • Databinding gives "System.Data.DataRowView" instead of actual values

    - by iTayb
    This is my code: string SQL = "SELECT email FROM members WHERE subscribe=true"; string myConnString = Application["ConnectionString"].ToString(); OleDbConnection myConnection = new OleDbConnection(myConnString); OleDbCommand myCommand = new OleDbCommand(SQL, myConnection); myConnection.Open(); OleDbDataAdapter MyAdapter = new OleDbDataAdapter(myCommand); DataSet ds = new DataSet(); MyAdapter.Fill(ds); MailsListBox.DataSource = ds; MailsListBox.DataBind(); GridView1.DataSource = ds; GridView1.DataBind(); myConnection.Close(); And so it looks: As you see, the GridView shows the dataset just fine, and the ListBox fails it. What happened? How can I fix it? Thank you very much.

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  • Canvas rotate from bottom center image angle?

    - by Tom
    How do you rotate an image with the canvas html5 element from the bottom center angle? See http://uptowar.com/test.php for my current code and image: <html> <head> <title>test</title> <script type="text/javascript"> function startup() { var canvas = document.getElementById('canvas'); var ctx = canvas.getContext('2d'); var img = new Image(); img.src = 'player.gif'; img.onload = function() { ctx.translate(185, 185); ctx.rotate(90 * Math.PI / 180); ctx.drawImage(img, 0, 0, 64, 120); } } </script> </head> <body onload='startup();'> <canvas id="canvas" style="position: absolute; left: 300px; top: 300px;" width="800" height="800"></canvas> </body> </html> Unfortunately this seems to rotate it from the top left angle of the image. Any idea? Edit: in the end the object (space ship) has to rotate like a clock pointer, as if it is turning right/left.

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  • ASP .NET - Substitution and page output (donut) caching - How to pass custom argument to HttpRespons

    - by zzare
    I would like to use substitution feature of donut caching. public static string GetTime(HttpContext context) { return DateTime.Now.ToString("T"); } ... The cached time is: <%= DateTime.Now.ToString("T") %> <hr /> The substitution time is: <% Response.WriteSubstitution(GetTime); %> ...But I would like to pass additional parameter to callback function beside HttpContext. so the question is: How to pass additional argument to GetTime callback? for instance, something like this: public static string GetTime(HttpContext context, int newArgument) { // i'd like to get sth from DB by newArgument // return data depending on the db values // ... this example is too simple for my usage if (newArgument == 1) return ""; else return DateTime.Now.ToString("T"); }

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  • XML deserialization problem (attribute with a namespace)

    - by Johnny
    hi, I'm trying to deserialize the following XML node (RDF actually) into a class. <rdf:Description rdf:about="http://d.opencalais.com/genericHasher-1/dae360d4-25f1-34a7-9c70-d5f7e4cfe175"> <rdf:type rdf:resource="http://s.opencalais.com/1/type/em/e/Country"/> <c:name>Egypt</c:name> </rdf:Description> [Serializable] [XmlRoot(Namespace = "http://www.w3.org/1999/02/22-rdf-syntax-ns#", ElementName = "Description")] public class BasicEntity { [XmlElement(Namespace = "http://s.opencalais.com/1/pred/", ElementName = "name")] public string Name { get; set; } [XmlAttribute("about", Namespace = "http://www.w3.org/1999/02/22-rdf-syntax-ns#")] public string Uri { get; set; } } The name element is parsed correctly but the about attribute isn't. What am I doing wrong?

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  • Convert sqlalchemy row object to python dict

    - by Anurag Uniyal
    or a simple way to iterate over columnName, value pairs? My version of sqlalchemy is 0.5.6 Here is the sample code where I tried using dict(row), but it throws exception , TypeError: 'User' object is not iterable import sqlalchemy from sqlalchemy import * from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import sessionmaker print "sqlalchemy version:",sqlalchemy.__version__ engine = create_engine('sqlite:///:memory:', echo=False) metadata = MetaData() users_table = Table('users', metadata, Column('id', Integer, primary_key=True), Column('name', String), ) metadata.create_all(engine) class User(declarative_base()): __tablename__ = 'users' id = Column(Integer, primary_key=True) name = Column(String) def __init__(self, name): self.name = name Session = sessionmaker(bind=engine) session = Session() user1 = User("anurag") session.add(user1) session.commit() # uncommenting next line throws exception 'TypeError: 'User' object is not iterable' #print dict(user1) # this one also throws 'TypeError: 'User' object is not iterable' for u in session.query(User).all(): print dict(u) Running this code on my system outputs: sqlalchemy version: 0.5.6 Traceback (most recent call last): File "untitled-1.py", line 37, in <module> print dict(u) TypeError: 'User' object is not iterable

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  • ruby xmpfilter on windows

    - by dreftymac
    Has anyone out there ever gotten xmpfilter to work on windows? xmpfilter "unterminated string meets end of file" is the error. The only Google hit is in Japanese: google://xmpfilter "unterminated string meets end of file" http://www.unkar.org/read/pc12.2ch.net/tech/1249687283 For background, the desired feature from xmpfilter is to get automatic "eval" annotations of Ruby sourcecode: Before: a = "bravo alpha charlie" # => b = a.split # => b.sort! # => After: a = "bravo alpha charlie" # => "bravo alpha charlie" b = a.split # => ["bravo", "alpha", "charlie"] b.sort! # => ["alpha", "bravo", "charlie"]

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  • Google App Engine: JDO does the job, JPA does not

    - by Phuong Nguyen de ManCity fan
    I have setup a project using both Jdo and Jpa. I used Jpa Annotation to Declare my Entity. Then I setup my testCases based on LocalTestHelper (from Google App Engine Documentation). When I run the test, a call to makePersistent of Jdo:PersistenceManager is perfectly OK; a call to persist of Jpa:EntityManager raised an error: java.lang.IllegalArgumentException: Type ("org.seamoo.persistence.jpa.model.ExampleModel") is not that of an entity but needs to be for this operation at org.datanucleus.jpa.EntityManagerImpl.assertEntity(EntityManagerImpl.java:888) at org.datanucleus.jpa.EntityManagerImpl.persist(EntityManagerImpl.java:385) Caused by: org.datanucleus.exceptions.NoPersistenceInformationException: The class "org.seamoo.persistence.jpa.model.ExampleModel" is required to be persistable yet no Meta-Data/Annotations can be found for this class. Please check that the Meta-Data/annotations is defined in a valid file location. at org.datanucleus.ObjectManagerImpl.assertClassPersistable(ObjectManagerImpl.java:3894) at org.datanucleus.jpa.EntityManagerImpl.assertEntity(EntityManagerImpl.java:884) ... 27 more How can it be the case? Below is the link to the source code of the maven projects that reproduce that problem: http://seamoo.com/jpa-bug-reproduce.tar.gz Execute the maven test goal over the parent pom you will notice that 3/4 tests from org.seamoo.persistence.jdo.JdoGenericDAOImplTest passed, while all tests from org.seamoo.persistence.jpa.JpaGenericDAOImplTest failed.

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  • filling array gradually with data from user

    - by neville
    I'm trying to fill an array with words inputted by user. Each word must be one letter longer than previous and one letter shorter than next one. Their length is equal to table row index, counting from 2. Words will finally create a one sided pyramid, like : A AB ABC ABCD Scanner sc = new Scanner(System.in); System.out.println("Give the height of array: "); String[] words = new String[height]; for(int i=2; i<height+2; i++){ System.out.println("Give word with "+i+" letters."); words[i-2] = sc.next(); while( words[i-2].length()>i-2 || words[i-2].length()<words[i-3].length() ){ words[i-2] = sc.next(); } } Currently the while loop doesn't influence scanner at all :/

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  • Is this good C# style?

    - by burnt1ce
    Consider the following method signature: public static bool TryGetPolls(out List<Poll> polls, out string errorMessage) This method performs the following: accesses the database to generate a list of Poll objects. returns true if it was success and errorMessage will be an empty string returns false if it was not successful and errorMessage will contain an exception message. Is this good style? Update: Lets say i do use the following method signature: public static List<Poll> GetPolls() and in that method, it doesn't catch any exceptions (so i depend the caller to catch exceptions). How do i dispose and close all the objects that is in the scope of that method? As soon as an exception is thrown, the code that closes and disposes objects in the method is no longer reachable.

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  • Java servlet and UTF-8 problem

    - by Gabriele
    I have some problem with UTF-8. My client (realized in GWT) make a request to my servlet, with some parametres in the URL, as follow: http://localhost:8080/servlet?param=value When in the servlet I retrieve the URL, I have some problem with UTF-8 characters. I use this code: protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("UTF-8"); String reqUrl = request.getRequestURL().toString(); String queryString = request.getQueryString(); System.out.println("Request: "+reqUrl + "?" + queryString); ... So, if I call this url: http://localhost:8080/servlet?param=così the result is like this: Request: http://localhost:8080/servlet?param=cos%C3%AC What can I do to set up properly the character encoding?

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  • Best way to pan & scan images with jquery

    - by guy
    Hello, I am trying to make an image pan & scan system. I have a slider that zooms the image (that can be dragged) and also a small map in the corner of the image (that can also be dragged). You can see a rough example here (sorry, I am not allowed to use the design, so it's not formatted): http://lighe.madetokill.com/test/test.html My problem is that although it works great in firefox and opera, it stutters in chrome, safari and IE (it doesn't currently work in IE) at any zoom level except 100% (at 100% it's butter smooth). What is the reason for webkit's poor performance? Am I implementing this wrong? I am basically changing the margin-left and margin-top properties of the image. I know this is fast enough since at 100% it's perfectly smooth. Would I be better off using canvas? I am trying to avoid flash (or any other plugins) if possible. Also please note this is work in progress, there are other bugs except this, so do not bother with those :) Thanks in advance!

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  • Take screenshot with Selenium: WaitForPageToLoad does not wait long enough

    - by OregonGhost
    I'm trying to get screenshots from a web page with multiple browsers. Just experimenting with Selenium RC, I wrote code like this: var sel = new DefaultSelenium(server, 4444, target, url); sel.Start(); sel.Open(url); sel.WaitForPageToLoad("30000"); var imageString = sel.CaptureScreenshotToString(); This basically works, but in most cases the screenshot is of a blank browser window, because the page is not yet ready for display. It kind of works if I add a sleep just after the WaitForPageToLoad, but that slows down the fast browsers and/or may be to short for the slower browsers (or under load). A typical solution for this seems to be to wait for the presence of a certain element. However, this is meant as a simple generic solution to get a screenshot of a local web page with as many browsers as possible (to test the layout) and I don't want to have to enter certain element names or whatever. It's a simple tool where you just enter the Selenium Server URL and the URL you want to test, and get the screenshots back. Any advice?

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  • Returning value of static property from public instance property

    - by Jamie Dixon
    I was just playing around with some code in LINQPad and managed to crash the program with a stackoverflow exception. I basically created a static property in a class and used another property to return the value from an instance. The getter of my instance property would return the value of the static property, but the setter would set itself. When would this type of pattern be used and how come it generated a stackoverflow exception? Code example of what I did: void Main() { SomeClass myinstance = new SomeClass(); SomeClass.x = "Some Value"; myinstance.y = "Some other value"; myinstance.y.Dump(); } public class SomeClass { public static string x; public string y { get { return x; } set { y = value; } } }

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  • jpa IllegalArgumentException exception

    - by Bunny Rabbit
    i've three entity classes in my project public class Blobx { @ManyToOne private Userx user; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Key id; } public class Index { @Id private String keyword; @OneToMany(cascade = CascadeType.PERSIST) private List<Blobx> blobs; } public class Userx { @Id private String name; @OneToMany(mappedBy = "user") private List<Blobx>blobs; } while running the following lines app engine throws an exception em.getTransaction().begin(); em.persist(index); em.getTransaction().commit();//exception is thrown em.close(); as Caused by: java.lang.IllegalArgumentException: can't operate on multiple entity groups in a single transaction. found both Element { type: "Index" name: "function" } and Element { type: "Userx" name: "18580476422013912411" } i can't understand what's wrong?

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  • Xpages - Get number of active sessions

    - by Jairo
    How do I get the number of active sessions in Xpage. I'm trying to use managed beans but it just returns a weird string. Here's the simple code: import javax.servlet.http.HttpSessionEvent; import javax.servlet.http.HttpSessionListener; public class SessionCounterListener implements HttpSessionListener { private static int totalActiveSessions; public static int getTotalActiveSessions(){ return totalActiveSessions | 0; } public void sessionCreated(HttpSessionEvent arg0) { totalActiveSessions++; System.out.println("sessionCreated - add one session into counter"); } public void sessionDestroyed(HttpSessionEvent arg0) { totalActiveSessions--; System.out.println("sessionDestroyed - deduct one session from counter"); } } I got this from here. But when I call SessionCounterListener.getTotalActiveSessions(), it only returns a weird string, example com.gs3.beans.SessionCounterListener@46c446c4. Please help me. Thanks a lot!

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  • Task queue java

    - by user268515
    Hi i'm new to Task queue java API i tried a simple Example for it. My idea is to redirect the queue file to a servlet and to print some statement in the servlet.But it doesn't work. i mapped web.xml and used default queue I didnt get any Error but the file is not redirected to servlet . this is the codee i followed taskq.java public class taskq extends HttpServlet { public void doGet(HttpServletRequest req, HttpServletResponse resp)throwsIOException { Queue queue = QueueFactory.getDefaultQueue(); System.out.println("taskqueue"); queue.add(url("/worker")); } worker.java public class worker extends HttpServlet { private static final long serialVersionUID = 1L; public String s; public void doGet(HttpServletRequest req, HttpServletResponse resp)throws IOException { String s="crimsom"; System.out.println(s); } } Please Help me on this issue. Regards Sharun.

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  • How to add a new item in a sharepoint list using web services in C sharp

    - by Frank
    Hi, I'm trying to add a new item to a sharepoint list from a winform application in c# using web services. As only result, I'm getting the useless exception "Exception of type 'Microsoft.SharePoint.SoapServer.SoapServerException' was thrown." I have a web reference named WebSrvRef to http://server/site/subsite/_vti_bin/Lists.asmx And this code: XmlDocument xmlDoc; XmlElement elBatch; XmlNode ndReturn; string[] sValues; string sListGUID; string sViewGUID; if (lstResults.Items.Count < 1) { MessageBox.Show("Unable to Add To SharePoint\n" + "No test file processed. The list is blank.", "Add To SharePoint", MessageBoxButtons.OK, MessageBoxIcon.Exclamation); return; } WebSrvRef.Lists listService = new WebSrvRef.Lists(); sViewGUID = "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"; // Test List View GUID sListGUID = "{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}"; // Test List GUID listService.Credentials= System.Net.CredentialCache.DefaultCredentials; frmAddToSharePoint dlgAddSharePoint = new frmAddToSharePoint(); if (dlgAddSharePoint.ShowDialog() == DialogResult.Cancel) { dlgAddSharePoint.Dispose(); listService.Dispose(); return; } sValues = dlgAddSharePoint.Tag.ToString().Split('~'); dlgAddSharePoint.Dispose(); string strBatch = "<Method ID='1' Cmd='New'>" + "<Field Name='Client#'>" + sValues[0] + "</Field>" + "<Field Name='Company'>" + sValues[1] + "</Field>" + "<Field Name='Contact Name'>" + sValues[2] + "</Field>" + "<Field Name='Phone Number'>" + sValues[3] + "</Field>" + "<Field Name='Brand'>" + sValues[4] + "</Field>" + "<Field Name='Model'>" + sValues[5] + "</Field>" + "<Field Name='DPI'>" + sValues[6] + "</Field>" + "<Field Name='Color'>" + sValues[7] + "</Field>" + "<Field Name='Compression'>" + sValues[8] + "</Field>" + "<Field Name='Value % 1'>" + (((float)lstResults.Groups["Value 1"].Tag)*100).ToString("##0.00") + "</Field>" + "<Field Name='Value % 2'>" + (((float)lstResults.Groups["Value 2"].Tag)*100).ToString("##0.00") + "</Field>" + "<Field Name='Value % 3'>" + (((float)lstResults.Groups["Value 3"].Tag)*100).ToString("##0.00") + "</Field>" + "<Field Name='Value % 4'>" + (((float)lstResults.Groups["Value 4"].Tag)*100).ToString("##0.00") + "</Field>" + "<Field Name='Value % 5'>" + (((float)lstResults.Groups["Value 5"].Tag)*100).ToString("##0.00") + "</Field>" + "<Field Name='Comments'></Field>" + "<Field Name='Overall'>" + (fTotalScore*100).ToString("##0.00") + "</Field>" + "<Field Name='Average'>" + (fTotalAvg * 100).ToString("##0.00") + "</Field>" + "<Field Name='Transfered'>" + sValues[9] + "</Field>" + "<Field Name='Notes'>" + sValues[10] + "</Field>" + "<Field Name='Resolved'>" + sValues[11] + "</Field>" + "</Method>"; try { xmlDoc = new System.Xml.XmlDocument(); elBatch = xmlDoc.CreateElement("Batch"); elBatch.SetAttribute("OnError", "Continue"); elBatch.SetAttribute("ListVersion", "1"); elBatch.SetAttribute("ViewName", sViewGUID); strBatch = strBatch.Replace("&", "&amp;"); elBatch.InnerXml = strBatch; ndReturn = listService.UpdateListItems(sListGUID, elBatch); MessageBox.Show(ndReturn.OuterXml); listService.Dispose(); } catch(Exception Ex) { MessageBox.Show(Ex.Message + "\n\nSource\n" + Ex.Source + "\n\nTargetSite\n" + Ex.TargetSite + "\n\nStackTrace\n" + Ex.StackTrace, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); listService.Dispose(); } What am I doing wrong? What am I missing? Please help!! Frank

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  • sprintf an LPCWSTR variable

    - by Julio
    Hello everyone. I'm trying to debug print an LPCWSTR string, but I get a problem during the sprintf push in the buffer, because it retrieve only the first character from the string. Here is the code: HANDLE WINAPI hookedCreateFileW(LPCWSTR lpFileName, DWORD dwDesiredAccess, DWORD dwShareMode, LPSECURITY_ATTRIBUTES lpSecurityAttributes, DWORD dwCreationDisposition, DWORD dwFlagsAndAttributes, HANDLE hTemplateFile) { char buffer[1024]; sprintf_s(buffer, 1024, "CreateFileW: %s", lpFileName); OutputDebugString(buffer); return trueCreateFileW(lpFileName, dwDesiredAccess, dwShareMode, lpSecurityAttributes, dwFlagsAndAttributes, dwCreationDisposition, hTemplateFile); } For example I get "CreateFileW: C" or "CreateFileW: \". How do I properly push it in the buffer? Thank you.

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  • "import numpy" tries to load my own package

    - by Sebastian
    I have a python (2.7) project containing my own packages util and operator (and so forth). I read about relative imports, but perhaps I didn't understand. I have the following directory structure: top-dir/ util/__init__.py (empty) util/ua.py util/ub.py operator/__init__.py ... test/test1.py The test1.py file contains #!/usr/bin/env python2 from __future__ import absolute_import # removing this line dosn't change anything. It's default functionality in python2.7 I guess import numpy as np It's fine when I execute test1.py inside the test/ folder. But when I move to the top-dir/ the import numpy wants to include my own util package: Traceback (most recent call last): File "tests/laplace_2d_square.py", line 4, in <module> import numpy as np File "/usr/lib/python2.7/site-packages/numpy/__init__.py", line 137, in <module> import add_newdocs File "/usr/lib/python2.7/site-packages/numpy/add_newdocs.py", line 9, in <module> from numpy.lib import add_newdoc File "/usr/lib/python2.7/site-packages/numpy/lib/__init__.py", line 4, in <module> from type_check import * File "/usr/lib/python2.7/site-packages/numpy/lib/type_check.py", line 8, in <module> import numpy.core.numeric as _nx File "/usr/lib/python2.7/site-packages/numpy/core/__init__.py", line 45, in <module> from numpy.testing import Tester File "/usr/lib/python2.7/site-packages/numpy/testing/__init__.py", line 8, in <module> from unittest import TestCase File "/usr/lib/python2.7/unittest/__init__.py", line 58, in <module> from .result import TestResult File "/usr/lib/python2.7/unittest/result.py", line 9, in <module> from . import util File "/usr/lib/python2.7/unittest/util.py", line 2, in <module> from collections import namedtuple, OrderedDict File "/usr/lib/python2.7/collections.py", line 9, in <module> from operator import itemgetter as _itemgetter, eq as _eq ImportError: cannot import name itemgetter The troublesome line is either from . import util or perhaps from operator import itemgetter as _itemgetter, eq as _eq What can I do?

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  • Converting to async,await using async targeting package

    - by e4rthdog
    I have this: private void BtnCheckClick(object sender, EventArgs e) { var a = txtLot.Text; var b = cmbMcu.SelectedItem.ToString(); var c = cmbLocn.SelectedItem.ToString(); btnCheck.BackColor = Color.Red; var task = Task.Factory.StartNew(() => Dal.GetLotAvailabilityF41021(a, b, c)); task.ContinueWith(t => { btnCheck.BackColor = Color.Transparent; lblDescriptionValue.Text = t.Result.Description; lblItemCodeValue.Text = t.Result.Code; lblQuantityValue.Text = t.Result.AvailableQuantity.ToString(); },TaskScheduler .FromCurrentSynchronizationContext() ); LotFocus(true); } and i followed J. Skeet's advice to move into async,await in my .NET 4.0 app. I converted into this: private async void BtnCheckClick(object sender, EventArgs e) { var a = txtLot.Text; var b = cmbMcu.SelectedItem.ToString(); var c = cmbLocn.SelectedItem.ToString(); btnCheck.BackColor = Color.Red; JDEItemLotAvailability itm = await Task.Factory.StartNew(() => Dal.GetLotAvailabilityF41021(a, b, c)); btnCheck.BackColor = Color.Transparent; lblDescriptionValue.Text = itm.Description; lblItemCodeValue.Text = itm.Code; lblQuantityValue.Text = itm.AvailableQuantity.ToString(); LotFocus(true); } It works fine. What confuses me is that i could do it without using Task but just the method of my Dal. But that means that i must have modified my Dal method, which is something i dont want? I would appreciate if someone would explain to me in "plain" words if what i did is optimal or not and why. Thanks P.s. My dal method public bool CheckLotExistF41021(string _lot, string _mcu, string _locn) { using (OleDbConnection con = new OleDbConnection(this.conString)) { OleDbCommand cmd = new OleDbCommand(); cmd.CommandText = "select lilotn from proddta.f41021 " + "where lilotn = ? and trim(limcu) = ? and lilocn= ?"; cmd.Parameters.AddWithValue("@lotn", _lot); cmd.Parameters.AddWithValue("@mcu", _mcu); cmd.Parameters.AddWithValue("@locn", _locn); cmd.Connection = con; con.Open(); OleDbDataReader rdr = cmd.ExecuteReader(); bool _retval = rdr.HasRows; rdr.Close(); con.Close(); return _retval; } }

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  • Binding custom property in Entity Framework

    - by deverop
    I have an employee entity in my EF model. I then added a class to the project to add a custom property public partial class Employee { public string Name { get { return string.Format("{0} {1}", this.FirstName, this.LastName); } } } On a aspx form (inside a FormView), I want to bind a DropDownList to the employee collection: <asp:Label runat="server" AssociatedControlID="ddlManagerId" Text="ManagerId" /> <asp:DropDownList ID="ddlManagerId" runat="server" DataSourceID="edsManagerId" DataValueField="Id" DataTextField="Name" AppendDataBoundItems="true" SelectedValue='<%# Bind("ManagerId") %>'> <asp:ListItem Text="-- Select --" Value="0" /> </asp:DropDownList> <asp:EntityDataSource ID="edsManagerId" runat="server" ConnectionString="name=Entities" DefaultContainerName="Entities" EntitySetName="Employees" EntityTypeFilter="Employee" EnableFlattening="true"> </asp:EntityDataSource> Unfortunately, when I fire up the page, I get an error: DataBinding: 'System.Web.UI.WebControls.EntityDataSourceWrapper' does not contain a property with the name 'Name'. Any ideas what I'm doing wrong?

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  • Theory of Computation - Showing that a language is regular..

    - by Tony
    I'm reviewing some notes for my course on Theory of Computation and I'm a little bit stuck on showing the following statement and I was hoping somebody could help me out with an explanation :) Let A be a regular language. The language B = {ab | a exists in A and b does not exist in A*} Why is B a regular language? Some points are obvious to me. If b is simply a constant string, this is trivial. Since we know a is in A and b is a string, regular languages are closed under union, so unioning the language that accepts these two strings is obviously regular. I'm not sure that b is constant, however. Maybe it is, and if so, then this isn't really an issue. I'm having a hard time making sense of it. Thanks!

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