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• How can the blank space in a C# comboBox be filled as a hint for the user?

  - by Jim Fell

  When a comboBox in C# is dynamically populated the comboBox appears blank until the user clicks on it to view the available items in the dropdown. Ideally, I would like to use this blank space (prior to clicking the dropdown) to be used to give the user a hint as to what s/he should do. For example, it might say something like, "Select such-and-such..." Is there a way to do this? I tried setting the Text property, but that didn't do anything. I am using Microsoft Visual C# 2008 Express Edition. Thanks.

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• jQuery Tips and Tricks

  - by roosteronacid

  Miscellaneous Creating an HTML Element and keeping a reference, Checking if an element exists, Writing your own selectors by Andreas Grech The data function - bind data to elements by TenebrousX The noConflict function - Freeing up the $ variable by Oli Check the index of an element in a collection by redsquare The jQuery metadata plug-in by kRON Live event handlers by TM Isolate the $ variable in noConflict mode by nickf Replace anonymous functions with named functions by ken Microsoft AJAX framework and jQuery bridge by Slace jQuery tutorials by egyamado Remove elements from a collection and preserve chainability by roosteronacid Declare $this at the beginning of anonymous functions by Ben FireBug lite, Hotbox plug-in, tell when an image has been loaded and Google CDN by Colour Blend Judicious use of third-party jQuery scripts by harriyott The each function by Jan Zich Form Extensions plug-in by Chris S Syntax No-conflict mode by roosteronacid Shorthand for the ready-event by roosteronacid Line breaks and chainability by roosteronacid Nesting filters by Nathan Long Cache a collection and execute commands on the same line by roosteronacid Contains selector by roosteronacid [Defining properties at element creation][26] by roosteronacid Optimization Optimize performance of complex selectors by roosteronacid The context parameter by lupefiasco Save and reuse searches by Nathan Long

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• Modifying a column with the 'Identity' pattern is not supported in WCF RIA Services

  - by Banford

  I've been following the walkthrough for creating your first WCF RIA Services Application from Microsoft and have encountered a problem when trying to edit and update data using the SubmitChanges() method of the Data Context. The table being updated has an Identity Specification set in SQL Server 2008 on the 'CourseID' column. However the PRIMARY key is a composite of two other fields. When using SubmitChanges() the application locks up in the browser an presents an unhandled exception. By handling this exception I managed to get the message: Modifying a column with the 'Identity' pattern is not supported. This is referring to the 'CourseID' column. Turning identity specification off solves the problem, but I need the auto-incrementing ID. In what way isn't this supported. Or where am I going wrong?

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• problem installing VS 2010 after uninstalling the RC

  - by rap-uvic

  Hi I uninstalled my VS 2010 RC to install VS 2010. However, it fails to install with the following error in the log files: d:\vs_setup.msi could not be opened. I've tried running the windows clean install and deleting any VS2010 files; also renamed the Microsoft Visual Studio 10.0 folder in the registry, but I keep getting the same error. I can see the vs_setup.msi on the dvd, it just won't allow me to run it directly. I have to run setup.exe. Any ideas?

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• Setting treeview background color in VB6 has a flaw - help?

  - by RenMan

  I have successfully implemented this method of using the Win32 API to set the background color of a treeview in VB 6: http://support.microsoft.com/kb/178491 However, one thing goes wrong: when you expand the tree nodes more than two levels deep, the area to the left of (and sometimes under) the inner plus [+] and minus [-] signs is still white. Does anyone know how to get this area to the correct background color, too? Note: I'm also setting the BackColor of each node, and also the BackColor of the treeview's imagelist. Here's my version of the code: Public Sub TreeView_SetBackgroundColor(TreeView As MSComctlLib.TreeView, BackgroundColor As Long) Dim lStyle As Long, Node As MSComctlLib.Node For Each Node In TreeView.Nodes Node.BackColor = BackgroundColor Next TreeView.ImageList.BackColor = BackgroundColor Call SendMessage( _ TreeView.hwnd, _ TVM_SETBKCOLOR, _ 0, _ ByVal BackgroundColor) 'Now reset the style so that the tree lines appear properly. lStyle = GetWindowLong(TreeView.hwnd, GWL_STYLE) Call SetWindowLong(TreeView.hwnd, GWL_STYLE, lStyle - TVS_HASLINES) Call SetWindowLong(TreeView.hwnd, GWL_STYLE, lStyle) End Sub

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• WCF Data Services implementation strategies.

  - by Nix

  Microsoft has done a savvy job of not outlining the actual place for data services in the wonderful world of SOA/Web dev. So my question is simple, are WCF Data Services designed to be used via clients? Or has anyone ever heard of someone using them on the server side? Simple scenario a general layered architecture using BO business objects (parenthesis indicate what is being passed between layers) (XML) WCF Service - (BO)Business Logic - (BO) Dao - Entity Framework or using data services it would be where DS BO are modeled business entities to be used in data service. (XML) WCF Service -(BO) Business Logic - (BO) WCF Data Service - (DS BO)Server I can't see a use for the later, unless there are going to be a lot of cases people would be accessing your data via your Data Service Layer vs the Service layer? Thoughts anyone? I have not seen any mention of using DS from within a Service Layer....

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• run .net consolapp out of a cgi script

  - by Nico

  Hello there, i have written a simple cgi python script which looks like this #!c:/Python25/python.exe -u import cgi import os def main(): print "Content-type: text/html\n" form = cgi.FieldStorage() print form["firstname"].value os.execvp("D:\\path\\to\\my\\consolapp.exe", [""]) main() As you can se i'd like to start a consoleapp which i have written in .net. But my consoleapp crashs when i call the cgi script. So i did a little debuging and write a text file after some actions i do in my .net program. The result was that my programm crash everytime i'd like to open a access mdb file. It told me that i need the Microsoft Data Access Components (MDAC). But i cant belive this message because my .net consoleapp runs without errors if i start it from my own. So can anybody give me some advise how i can call my .net consol ab through a webscript. I'm happy for every advise So it don't have to be a solution using a cgi script. Regards, Nico

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• ExceptionPolicy.HandleException does not install Event Source for Logging in Registry if XBAP run ou

  - by Neo

  I am using the Logging Application Block (of Microsoft Enterprise Library) to log exceptions in the Event Viewer that occur in my WPF XBAP application. If I run the XBAP in the debugger from Visual Studio, an Event Source entry for my application is automatically created in the Registry at: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\Application\MyApp This occurs at the point ExceptionPolicy.HandleException() is called. However, if I run the XBAP outside of the IDE directly from the file system or from its published location, the Registry entry isn't added. Therefore, no logging takes place. I can only assume this is a security issue with running XBAP applications and they do not have access to write to the Registry. Is this a setting within my project? Any idea on why this might be happening? Any help much appreciated.

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• ASP.NET Grid AjaxPanel Download Issue

  - by Mahesh

  Hi, I have a telerik grid which is performing operations like searching,sorting,filtering etc. To make customers happy, we put this control in an ajax panel for seamless experience. Now, we added a new functionality to the grid where the customer can download the entire row information as a csv file. As the response is a file, ajax panel is trying to parse the output and throwing the following exception: Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled. Details: Error parsing near '?'. Could you please help me in having both functionalities( Ajax and Download) in place without any error?? Thanks, Mahesh

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• FBA and audience targeting in sharepoint 2007

  - by intangible02

  I want to use audience targeting feature for webpart with FBA. I tried to add FBA user directly in sharepoint group or added the user to a asp.net role and then added the role to sharepoint group, but both failed. My observation is that all FBA users can see the webpart content no matter whether they are specified in audience targeting or not. After googling it, I found there are three different conclusion about this, FBA cannot be used with audience targeting FBA can be used with audience targeting FBA can be used with audience targeting if the FBA user is added directly to sharepoint group May I know which is the correct explanation? Where can I find official Microsoft documentation regarding to this problem?

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• Why does a ModalPopupExtender fail when using SSL?

  - by Brooke Jackson

  I have created a modal popup using the ModalPopupExtender in Microsoft's AJAX 1.0 for .NET 2.0. It works great when the page doesn't isn't being accessed through SSL (http://) however the link to close the popup fails to fire if accessing the page through https://. Is the ModalPopupExtender at blame? Is it a "Feature" of SSL to block popups, or is it something else I haven't though of? Here is the code I am using: <asp:Button ID="btnHelp" runat="server" Text="?" CausesValidation="False" /> <asp:Panel ID="pnlHelp" BackColor="white" runat="server"> <asp:LinkButton ID="lnkClosePanel" runat="server" CausesValidation="False" OnClick="lnkCloseHelp_Click">Close</asp:LinkButton> <p>Some Text</p> </asp:Panel> <cc1:ModalPopupExtender ID="popExt" runat="server" TargetControlID="btnHelp" PopupControlID="pnlHelp"></cc1:ModalPopupExtender>

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• WCF Proxy generation

  - by dragonfly

  Hi, I'm generating proxy using svcutil tool. My contract methods return objects of particular type. However generated proxy client interface has return value of type object. What is more I get exception with message: System.ServiceModel.FaultException`1[System.ServiceModel.ExceptionDetail] : The formatter threw an exception while trying to deserialize the message: There was an error while trying to deserialize parameter http://tempuri.org/:name. The InnerException message was 'XML 'Element' 'http://tempuri.org/:name' does not contain expected attribute 'http://schemas.microsoft.com/2003/10/Serialization/:Type'. The deserializer has no knowledge of which type to deserialize. Check that the type being serialized has the same contract as the type being deserialized.'. Please see InnerException for more details. Any ideas what's going on?

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• MIDL2003 Error in VC6 project

  - by graham.reeds

  While bug fixing I tracked a problem to an old vc6 compiled dll that hasn't been touched in nearly 3 years. After checking out the most recent source I am getting the following error when trying to compile. Processing C:\PROGRAM FILES\MICROSOFT SDK\INCLUDE\msxml.idl msxml.idl .\ocidl.idl(1524) : error MIDL2003 : redefinition : IErrorLog .\ocidl.idl(1541) : error MIDL2003 : redefinition : IPropertyBag Google gives lots of suggestions regarding Visual Studio 2002 - 2003 errors but I can't find anything that relates to Visual Studio 6 or can be applied to my problem. I did find this page but following it's advice didn't fix my problem. Does anyone have any suggestions on how to fix this? (I am presuming that it did work once.) Other items of interest: I have the February 2003 Platform SDK installed, and looking at the add/remove program page I have Micrsoft XML Parser and SDK, MSXML 4.0 SP2 and MSXML 6.0 Parser too.

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• Regarding to get refrence of IDot11AdHocManager Interface of COM WiFi AdHoc manager Interface

  - by sathaliyawala

  I am Trying to create AdHoc connection and for this i am using AdHoc wifi Interface provided by Microsoft. I have written code :- IDot11AdHocManager *pIAdHocMng = NULL ; HRESULT hr = CoInitialize(NULL); hr = CoCreateInstance(CLSID_Dot11AdHocManager,NULL,CLSCTX_INPROC_HANDLER ,IID_IDot11AdHocManager ,(void**)pIAdHocMng); if(hr == S_OK) printf("CreateNetwork Method success due to following reason :\n %ld",hr) ; else printf("CreateNetwork Method fail due to following reason : %ld \n ",hr) ; getch(); CoUninitialize(); But it will not return reference of Dot11AdHocManager it will return error and NULL value please help me to get the reference of Dot11AdHocManager Interface so i can use it method which help me to create the AdHoc Network

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• Best Practices - Data Annotations vs OnChanging in Entity Framework 4

  - by jptacek

  I was wondering what the general recommendation is for Entity Framework in terms of data validation. I am relatively new to EF, but it appears there are two main approaches to data validation. The first is to create a partial class for the model, and then perform data validations and update a rule violation collection of some sort. This is outlined at http://msdn.microsoft.com/en-us/library/cc716747.aspx The other is to use data annotations and then have the annotations perform data validation. Scott Guthrie explains this on his blog at http://weblogs.asp.net/scottgu/archive/2010/01/15/asp-net-mvc-2-model-validation.aspx. I was wondering what the benefits are of one over the other. It seems the data annotations would be the preferred mechanism, especially as you move to RIA Services, but I want to ensure I am not missing something. Of course, nothing precludes using both of them together. Thanks John

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• MathML or OMML to PNG w/ .NET?

  - by charliedigital

  Are there any libraries which take MathML (or, even more preferably, OMML) and outputs a .PNG file? I am putting together an export process for .docx files and, as a part of this process, I'd like to extract equations and render them as .PNG files. Word 2007 does this natively when you save a document for the web, but so far, I have not been able to find a way to do this programmatically (if anyone has an answer for that, it would be even better). So the next best thing is to take the OMML and use the Microsoft provided XSL stylesheets and transform them to MathML. Unfortunately, I haven't been able to find any (working) rendering libraries for either MathML or OMML. If there aren't any pure .NET libraries for this, I'll settle for just about anything that I can call from a commandline to output a .PNG from either MathML or OMML.

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• Response.TransmitFile() with UNC share (ASP.NET)

  - by frankadelic

  In the comments of this page: http://msdn.microsoft.com/en-us/library/12s31dhy.aspx ..it says that TransmitFile() cannot be used with UNC shares. As far as I can tell, this is the case; I get this error in Event Log when I attempt it: TransmitFile failed. File Name: \\myshare1\e$\file.zip, Impersonation Enabled: 0, Token Valid: 1, HRESULT: 0x8007052e The suggested alternative is to use WriteFile(), however, this is problematic because it loads the file into memory. In my application, the files are 200MB, so this is not going to scale. Is there a method in ASP.NET for streaming files to users that's: scalable (doesn't read entire file into RAM or occupy ASP.NET threads) works with UNC shares Mapping a network drive as a virtual directory is not an option for us. I would like to avoid copying the file to the local web server as well. Thanks

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• How to get Employeers-ID atribute from active directory on webpart

  - by Serafi

  Hello all, I have managed to get info about the currently logged in user on my webpart by using this short code; WindowsPrincipal p = Thread.CurrentPrincipal as WindowsPrincipal; string strLoggedInUser = p.Identity.Name; What I would need now, is to get info of Employeer-ID atribute from the active directory, wich I have added by following this quide over here; http://www.tech-archive.net/Archive/Windows/microsoft.public.windows.server.active_directory/2005-08/msg01766.html I have found serval of quides about how to use active directory on the webpart, but they all were very complex for me to understand. And I only wish to get info about this single attribute "Employeers-ID". Can anyone help me with this? Thanks in advance!

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• jni4net - how to set the absolute path to jni4net.j-0.7.1.0.jar

  - by w1z

  Guys, help me... I use jni4net in my WCF service. in the ctor of the service I try to create BridgeSetup object. var bridgeSetup = new BridgeSetup(false); bridgeSetup.AddAllJarsClassPath("."); Bridge.CreateJVM(bridgeSetup); As I understand in this moment jni4ne tryes to generate jni4net.j-0.7.1.0.dll from jni4net.j-0.7.1.0.jar. It tryes to find jni4net.j-0.7.1.0.jar near the jni4net.n-0.7.1.0.dll and can't. So I get next error... c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\fileprocessingservice\76f0fa69\5db44426\assembly\dl3\4fa263c6\f424b7fa_c8ccca01\jni4net.j-0.7.1.0.DLL Anybody know how to solve the problem? Thanks..

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• Robotics Simulator

  - by Arkapravo

  Which is the best robotics simulator ? Player Project (simulator + control interface) Microsoft Robotics Studio (simulator + control interface) KiKS (in Matlab, only for Khepera) MobotSim (for point like robots ) ROS (I have only heard about it) URBI (also, only heard about it) Any other As of now, I am just looking to get simple simulations of Potential Field method, Bug Algorithms, A* Algorithm etc ! This article gives a number of such softwares etc, however I was looking for a first hand view from fellow stackoverflowers. Anyone who has worked with any other software etc is most welcome to share his/her experience !

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• Debuging VBScript in Visual Studios Express

  - by Wil

  I have read around the net that its possible to debug VBScript WSH files Visual Studios 2005 Express (I think Web Edition) but everytime I try cscript.exe myscript.vbs //X the script just executes. I have tried VS Express 2005, 2008 and 2010 all editions. I have also tried Visual Studios Premium 2010 which does infact debug scripts as I would expect however I want to be able to debug scripts with free tools (I don't want to get a VS 2010 licence for all the other people on my team). I know about Microsoft Script Debugger but it doesn't let you discover objects as well as Visual studios does.

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• generate only objectLayer of Entity Framework Model by edmgen tool

  - by loviji

  How to generate only objectLayer by edmgen tool, without generating csdl, ssdl and views ? *"%windir%\Microsoft.NET\Framework\v4.0.30319\edmgen.exe" /mode:fullgeneration /c:"Data Source=.\sqlexpress; Initial Catalog=uqs; Integrated Security=SSPI" /project:generateEntityModel /entitycontainer:uqsEntities /namespace:uqsModel /language:CSharp /outobjectlayer:"D:/uqsObjectLayer.cs" * in this script I don't write location to write csdl, ssdl and views , but they are generated in C:\Users\adminUser in windows Vista and objectLayer generated to D:/uqsObjectLayer.cs. If I use /mode:EntityClassGeneration, this option requires the /incsdl argument and either the /project argument or the /outobjectlayer argument. The /language argument is optional. But I don't want use csdl file. As I understand, edmgen.tool can not create objectlayer without csdl file. Now is there alternate way or tool for generating objectlayer from db?

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• Migrating test cases & defects from Quality Center to TFS 2008/2010

  - by stackoverflowuser

  Tool that can be used to migrate (or even better..synchronize) test cases and bugs between: TFS 2008 and Quality Center 9.2 (or later) TFS 2010 and Quality Center 9.2 (or later) I am aware of the following tools: Test Case Migrator (Excel/MHT) Tool TFS Bug Item Synchronizer 2.2 for Quality Center Also shai raiten mentions on his blog about QC 2 Team System 2010 migration tool that he has been working on and its done. But could not find any link for downloading the tool. http://blogs.microsoft.co.il/blogs/shair/archive/2009/12/31/quality-center-migration-to-team-system-2010-done.aspx Before jumping on coding with TFS SDK and QC components to come up with my own tool I need some inputs from the stackoverflow community.

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• Reference custom list form fields from code behind and automatically fill them with values.

  - by Janis Veinbergs

  Hello. I`v made my custom NewForm.aspx for my list and I want to add some custom code to it. So I inherit that form from my own class: public class MyCustomNewForm : Microsoft.SharePoint.WebPartPages.WebPartPage Now I want to reference some of available fields to automatically fill them for user. (Javascript won't help here as I have to get some data from other lists). But I have no idea how do I reference these fields from codebehind files. The code for control field is written (well, it was generated by Sharepoint Designer when using command Insert SharePoint Controls Custom List Form...) in .aspx page like this: <SharePoint:FormField runat="server" id="ff1{$Pos}" ControlMode="New" FieldName="Title" __designer:bind="{ddwrt:DataBind('i',concat('ff1',$Pos),'Value','ValueChanged','ID',ddwrt:EscapeDelims(string(@ID)),'@Title')}"/> When looking at id at runtime, it is insanely long So how do i reference fields, so I could set Text property on them in my codebehind file?

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• BAD_UID error while exporting key in CryptoAPI

  - by mindthief

  Hi all, I am writing a test application for Microsoft CryptoAPI. I want to export the secret key of one party using the public key of the second party, and then import that secret key as the second party's secret key (this sets up a shared secret key for communication). Here is my code: if(!CryptExportKey(encryptT->hSymKey, decryptT->hPubKey, SIMPLEBLOB, 0, keyExBuf, &bufLen)) { FormattedDebugPrint(NULL, GetLastError(), "could not export secret key", TRUE); return -1; } if(!CryptImportKey(decryptT->hCryptProv, keyExBuf, bufLen, decryptT->hPubKey, 0, &(decryptT->hSymKey))) { FormattedDebugPrint(NULL, GetLastError(), "could not import secret key", TRUE); return -1; } And this gives the error: 80090001: Bad UID. The public keypair is being generated for both encryptT and decryptT (sender, receiver) by calling: CryptGenKey(encryptT->hCryptProv, CALG_RSA_KEYX, CRYPT_EXPORTABLE, &(encryptT->hPubKey)) Any idea what could be causing the error? Thanks,

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