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Articles indexed Tuesday June 15 2010

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  • SerialPort.Write() - How to stop writing?

    - by DaniMelo
    Hello, I am developing in C# using the SerialPort class. SerialPort.Write() is a blocking method. How can I exit this method when I want to stop writing? I use a thread to write. I abort this thread when I want to stop writing but the COM port continues to write. Any ideas? Thanks a lot. Sorry for my basic English.

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  • Why does reusing arrays increase performance so significantly in c#?

    - by Willem
    In my code, I perform a large number of tasks, each requiring a large array of memory to temporarily store data. I have about 500 tasks. At the beginning of each task, I allocate memory for an array : double[] tempDoubleArray = new double[M]; M is a large number depending on the precise task, typically around 2000000. Now, I do some complex calculations to fill the array, and in the end I use the array to determine the result of this task. After that, the tempDoubleArray goes out of scope. Profiling reveals that the calls to construct the arrays are time consuming. So, I decide to try and reuse the array, by making it static and reusing it. It requires some additional juggling to figure out the minimum size of the array, requiring an extra pass through all tasks, but it works. Now, the program is much faster (from 80 sec to 22 sec for execution of all tasks). double[] tempDoubleArray = staticDoubleArray; However, I'm a bit in the dark of why precisely this works so well. Id say that in the original code, when the tempDoubleArray goes out of scope, it can be collected, so allocating a new array should not be that hard right? I ask this because understanding why it works might help me figuring out other ways to achieve the same effect, and because I would like to know in what cases allocation gives performance issues.

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  • Encrypting property values in Nant

    - by Diego C.
    I need to store authentication information and I rather not have the password in plain text: <property name="user" value="theUser"/> <property name="password" value="secret"/> Has anyone figured out a way to encrypt property values in Nant? I've looked in Nant and Nantcontrib docs but no mention of encryption. I am considering going the route of creating my own Nant Task. Any suggestions?

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  • Follow tab's url in jquery ui tabs

    - by Aakash Chakravarthy
    Hello, I have jquery tabs like <ul id="tabsList"> <li><a href="#tab-1">Name 1</a></li> <li><a href="#tab-2">Name 2</a></li> <li><a href="http://www.google.com/">Name 3</a></li> </ul> <div id="tab-1">content 1</div> <div id="tab-2">content 2</div> the first two tabs load the respective divs. But the third one should go to google.com, instead it does nothing. It just adds http://example.com/index.html#ui-tabs-[object Object] to the url. I am developing a wordpress plugin and the admin page needs a tab interface. I tested this in a local server and not working update: i don't want to load google.com inside the page. It should open the webpage in new tab/window like ordinary links do.

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  • jquery callback functions failing to finish execution

    - by calumbrodie
    I'm testing a jquery app i've written and have come across some unexpected behaviour $('button.clickme').live('click',function(){ //do x (takes 2 seconds) //do y (takes 4 seconds) //do z (takes 0.5 seconds) }) The event can be triggered by a number of buttons. What I'm finding is that when I click each button slowly (allowing 10 seconds between clicks) - my callback function executes correctly (actions x, y & z complete). However If I rapidly click buttons on my page it appears that the function sometimes only completes up to step x or y before terminating. My question: Is it the case that if this function is fired by a clicking second DOM element, while the first callback function is completing - will jQuery terminate the first callback and start over again? Do I have to write my callback function explicitly outside the event handler and then call it?? function doStuff() { //do x //do y //do z ( } $('button.clickme).live('click',doStuff()) If this is the case can someone explain why this is happening or give me a link to some advice on best practice on closures etc - I'd like to know the BEST way to write jQuery to improve performance etc. Thanks

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  • Styling individual menu links in Joomla!

    - by jonos
    Using Joomla, I have a flat list menu (see image) and am using separator links with images to separate the menu links. I'd like to style the menu links (not the separator links) so that they are lifted up slightly and are sitting more centrally among the separator images. Can anybody help with this?

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  • Android: Associating Browser to File Type in App

    - by tekmunki
    I'm attempting to write a simple app that associates a file type to the browser; this is assuming the browser will open the file locally... If this doesn't work, the local file - editor will be fine. I have an option of auto-mailing .ELC files from a custom app, they are basically html formatted TEXT or TXT only files; I would like to associate the .elc extension so that it will open direct from mail rather than just "Save to SD Card" as a mail option. Here's the code I'm at right now; AndroidManifest.xml: ELCViewer.java: package com.tekmunki.ELCViewer; import android.app.Activity; import android.os.Bundle; import android.widget.TextView; public class ELCViewer extends Activity { /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); TextView tv = new TextView(this); tv.setText("ELC Viewer Installed! Now, when you receive the ELC files, they will open in the browser."); setContentView(tv); } } 1) How do I make the browser associated with the ELCViewer Activity? (Do I need to make a second activity, or can that all be done in the manifest?) 2) How do I make it persist after the app has been ran once?

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  • Import excel files with image in php/mysql

    - by Marcel
    Hi all! I want to make an import script which allows users to upload their excel file (extension not important) to my php application. The application should reconize a list of items (so far so good). The difficulty in this case is that the excel files contain images...I've read information about phpexcel library but it does not say anything about images. Anybody ideas? Regards, Marcel

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  • AD Password About to Expire check problem with ASP.Net

    - by Vince
    Hello everyone, I am trying to write some code to check the AD password age during a user login and notify them of the 15 remaining days. I am using the ASP.Net code that I found on the Microsoft MSDN site and I managed to add a function that checks the if the account is set to change password at next login. The login and the change password at next login works great but I am having some problems with the check for the password age. This is the VB.Net code for the DLL file: Imports System Imports System.Text Imports System.Collections Imports System.DirectoryServices Imports System.DirectoryServices.AccountManagement Imports System.Reflection 'Needed by the Password Expiration Class Only -Vince Namespace FormsAuth Public Class LdapAuthentication Dim _path As String Dim _filterAttribute As String 'Code added for the password expiration added by Vince Private _domain As DirectoryEntry Private _passwordAge As TimeSpan = TimeSpan.MinValue Const UF_DONT_EXPIRE_PASSWD As Integer = &H10000 'Function added by Vince Public Sub New() Dim root As New DirectoryEntry("LDAP://rootDSE") root.AuthenticationType = AuthenticationTypes.Secure _domain = New DirectoryEntry("LDAP://" & root.Properties("defaultNamingContext")(0).ToString()) _domain.AuthenticationType = AuthenticationTypes.Secure End Sub 'Function added by Vince Public ReadOnly Property PasswordAge() As TimeSpan Get If _passwordAge = TimeSpan.MinValue Then Dim ldate As Long = LongFromLargeInteger(_domain.Properties("maxPwdAge")(0)) _passwordAge = TimeSpan.FromTicks(ldate) End If Return _passwordAge End Get End Property Public Sub New(ByVal path As String) _path = path End Sub 'Function added by Vince Public Function DoesUserHaveToChangePassword(ByVal userName As String) As Boolean Dim ctx As PrincipalContext = New PrincipalContext(System.DirectoryServices.AccountManagement.ContextType.Domain) Dim up = UserPrincipal.FindByIdentity(ctx, userName) Return (Not up.LastPasswordSet.HasValue) 'returns true if last password set has no value. End Function Public Function IsAuthenticated(ByVal domain As String, ByVal username As String, ByVal pwd As String) As Boolean Dim domainAndUsername As String = domain & "\" & username Dim entry As DirectoryEntry = New DirectoryEntry(_path, domainAndUsername, pwd) Try 'Bind to the native AdsObject to force authentication. Dim obj As Object = entry.NativeObject Dim search As DirectorySearcher = New DirectorySearcher(entry) search.Filter = "(SAMAccountName=" & username & ")" search.PropertiesToLoad.Add("cn") Dim result As SearchResult = search.FindOne() If (result Is Nothing) Then Return False End If 'Update the new path to the user in the directory. _path = result.Path _filterAttribute = CType(result.Properties("cn")(0), String) Catch ex As Exception Throw New Exception("Error authenticating user. " & ex.Message) End Try Return True End Function Public Function GetGroups() As String Dim search As DirectorySearcher = New DirectorySearcher(_path) search.Filter = "(cn=" & _filterAttribute & ")" search.PropertiesToLoad.Add("memberOf") Dim groupNames As StringBuilder = New StringBuilder() Try Dim result As SearchResult = search.FindOne() Dim propertyCount As Integer = result.Properties("memberOf").Count Dim dn As String Dim equalsIndex, commaIndex Dim propertyCounter As Integer For propertyCounter = 0 To propertyCount - 1 dn = CType(result.Properties("memberOf")(propertyCounter), String) equalsIndex = dn.IndexOf("=", 1) commaIndex = dn.IndexOf(",", 1) If (equalsIndex = -1) Then Return Nothing End If groupNames.Append(dn.Substring((equalsIndex + 1), (commaIndex - equalsIndex) - 1)) groupNames.Append("|") Next Catch ex As Exception Throw New Exception("Error obtaining group names. " & ex.Message) End Try Return groupNames.ToString() End Function 'Function added by Vince Public Function WhenExpires(ByVal username As String) As TimeSpan Dim ds As New DirectorySearcher(_domain) ds.Filter = [String].Format("(&(objectClass=user)(objectCategory=person)(sAMAccountName={0}))", username) Dim sr As SearchResult = FindOne(ds) Dim user As DirectoryEntry = sr.GetDirectoryEntry() Dim flags As Integer = CInt(user.Properties("userAccountControl").Value) If Convert.ToBoolean(flags And UF_DONT_EXPIRE_PASSWD) Then 'password never expires Return TimeSpan.MaxValue End If 'get when they last set their password Dim pwdLastSet As DateTime = DateTime.FromFileTime(LongFromLargeInteger(user.Properties("pwdLastSet").Value)) ' return pwdLastSet.Add(PasswordAge).Subtract(DateTime.Now); If pwdLastSet.Subtract(PasswordAge).CompareTo(DateTime.Now) > 0 Then Return pwdLastSet.Subtract(PasswordAge).Subtract(DateTime.Now) Else Return TimeSpan.MinValue 'already expired End If End Function 'Function added by Vince Private Function LongFromLargeInteger(ByVal largeInteger As Object) As Long Dim type As System.Type = largeInteger.[GetType]() Dim highPart As Integer = CInt(type.InvokeMember("HighPart", BindingFlags.GetProperty, Nothing, largeInteger, Nothing)) Dim lowPart As Integer = CInt(type.InvokeMember("LowPart", BindingFlags.GetProperty, Nothing, largeInteger, Nothing)) Return CLng(highPart) << 32 Or CUInt(lowPart) End Function 'Function added by Vince Private Function FindOne(ByVal searcher As DirectorySearcher) As SearchResult Dim sr As SearchResult = Nothing Dim src As SearchResultCollection = searcher.FindAll() If src.Count > 0 Then sr = src(0) End If src.Dispose() Return sr End Function End Class End Namespace And this is the Login.aspx page: sub Login_Click(sender as object,e as EventArgs) Dim adPath As String = "LDAP://DC=xxx,DC=com" 'Path to your LDAP directory server Dim adAuth As LdapAuthentication = New LdapAuthentication(adPath) Try If (True = adAuth.DoesUserHaveToChangePassword(txtUsername.Text)) Then Response.Redirect("passchange.htm") ElseIf (True = adAuth.IsAuthenticated(txtDomain.Text, txtUsername.Text, txtPassword.Text)) Then Dim groups As String = adAuth.GetGroups() 'Create the ticket, and add the groups. Dim isCookiePersistent As Boolean = chkPersist.Checked Dim authTicket As FormsAuthenticationTicket = New FormsAuthenticationTicket(1, _ txtUsername.Text, DateTime.Now, DateTime.Now.AddMinutes(60), isCookiePersistent, groups) 'Encrypt the ticket. Dim encryptedTicket As String = FormsAuthentication.Encrypt(authTicket) 'Create a cookie, and then add the encrypted ticket to the cookie as data. Dim authCookie As HttpCookie = New HttpCookie(FormsAuthentication.FormsCookieName, encryptedTicket) If (isCookiePersistent = True) Then authCookie.Expires = authTicket.Expiration End If 'Add the cookie to the outgoing cookies collection. Response.Cookies.Add(authCookie) 'Retrieve the password life Dim t As TimeSpan = adAuth.WhenExpires(txtUsername.Text) 'You can redirect now. If (passAge.Days = 90) Then errorLabel.Text = "Your password will expire in " & DateTime.Now.Subtract(t) 'errorLabel.Text = "This is" 'System.Threading.Thread.Sleep(5000) Response.Redirect("http://somepage.aspx") Else Response.Redirect(FormsAuthentication.GetRedirectUrl(txtUsername.Text, False)) End If Else errorLabel.Text = "Authentication did not succeed. Check user name and password." End If Catch ex As Exception errorLabel.Text = "Error authenticating. " & ex.Message End Try End Sub ` Every time I have this Dim t As TimeSpan = adAuth.WhenExpires(txtUsername.Text) enabled, I receive "Arithmetic operation resulted in an overflow." during the login and won't continue. What am I doing wrong? How can I correct this? Please help!! Thank you very much for any help in advance. Vince

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  • What Are All the Variables Necessary to Create Blackbox Logs for Nginx?

    - by Alan Gutierrez
    There's an article out there, Profiling LAMP Applications with Apache's Blackbox Logs, that describes how to create a log that records a lot of detailed information missing in the common and combined log formats. This information is supposed to help you resolve performance issues. As the author notes "While the common log-file format (and the combined format) are great for hit tracking, they aren't suitable for getting hardcore performance data." The article describes a "blackbox" log format, like a blackbox flight recorder on an aircraft, that gathers information used to profile server performance, missing from the hit tracking log formats: Keep alive status, remote port, child processes, bytes sent, etc. LogFormat "%a/%S %X %t \"%r\" %s/%>s %{pid}P/%{tid}P %T/%D %I/%O/%B" blackbox I'm trying to recreate as much of the format for Nginx, and would like help filling in the blanks. Here's what Nginx blackbox format would look like, the unmapped Apache directives have question marks after their names. access_log blackbox '$remote_addr/$remote_port X? [$time_local] "$request"' 's?/$status $pid/0 T?/D? I?/O?/B?' Here's a table of the variables I've been able to map from the Nginx documentation. %a = $remote_addr - The IP address of the remote client. %S = $remote_port - The port of the remote client. %X = ? - Keep alive status. %t = $time_local - The start time of the request. %r = $request - The first line of request containing method verb, path and protocol. %s = ? - Status before any redirections. %>s = $status - Status after any redirections. %{pid}P = $pid - The process id. %{tid}P = N/A - The thread id, which is non-applicable to Nignx. %T = ? - The time in seconds to handle the request. %D = ? - The time in milliseconds to handle the request. %I = ? - The count of bytes received including headers. %O = ? - The count of bytes sent including headers. %B = ? - The count of bytes sent excluding headers, but with a 0 for none instead of '-'. Looking for help filling in the missing variables, or confirmation that the missing variables are in fact, unavailable in Nginx.

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  • How to uninstall broken programs in windows 7

    - by XGreen
    Hi, Could anyone tell me how to uninstall programs that their installation had a problem and therefore their uninstall doesn't work? I removed all their references in the registry and their folder on the hdd but still don't know how to get rid of them completely from Add/Remove Programs list. Thanks

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