Error : I forget about the error messages. If I'm not mistaken, the error message was just as common. As far as I remember, it sounds like this :Unable to Start Debugging on the Web Server... user is not a member of "debugger users"Solution : Run Internet Explorer (it should be more or less the same in other browsers), choose menu Tools -> Internet...
Friday, April 24, 2009
ASP.NET State Service
Error :Unable to make the session state request to the session state server. Please ensure that the ASP.NET State service is started and that the client and server ports are the same. If the server is on a remote machine, please ensure that it accepts remote requests by checking thevalue of HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\aspnet_state\Parameters\AllowRemoteConnection....
Crystal Report error while deploying
Error : Could not load file or assembly 'CrystalDecisions.ReportAppServer.CommLayer, Version=10.5.3700.0, Culture=neutral, PublicKeyToken=692fbea5521e1304' or one of itsdependencies. The system cannot find the file specified.Solution : Install crystal report runtime available in Visual Studio CD, on the serv...
Error on connection string
Error : An error has occurred while establishing a connection to the server. When connecting to SQL Server 2005, this failure may be caused by the fact that under the default settings SQL Server does not allow remote connections. (provider: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)Solution : Check if the connection...
Error on event validation
Error :Invalid postback or callback argument. Event validation is enabled using in configuration or <%@ Page EnableEventValidation="true" %> in a page. For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them. If the data is valid and expected,...
Also cannot debug application
Error : Error while trying to run project: unable to start debugging on the web server. the project is not configured to be debugged.This is the most widely retrieved error while developing web applications... Hahaha... And the solutions may vary greatly. This solution works in my case.Solution : re-register aspnet to IIS. Go to start menu -> Programs...
Cannot debug application
Error : Cannot start service from the command line or a debugger. A Windows Service must first be installed (using installutil.exe) and then started with the ServerExplorer, Windows Services Administrative tool or the NET START command.Solution : Check the start-up project. Make sure the start-up project is the web application, not a class library...
Error while building on release mode
Error : "LC.exe" exited with code -1073741701I was building a pre-compiled web in release mode (using WebDeployment program). As known, compiling in release mode always retrieves undiscovered errors -.-"""Solution : Exclude licenses.licx file from project, then rebuild again.There was a time when I faced the same problem, after my computer was attacked...
Parser Error
Error :Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.Parser Error Message: Could not load type 'Web.MasterPages.GeneralTemplate'.Source Error:Line 1: <%@ Master Language="C#" AutoEventWireup="true"...
Ambiguous match found
Error :Server Error in '/Web' Application.Parser ErrorDescription: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.Parser Error Message: Ambiguous match found.Source Error:Line 1: <%@ Control Language="c#" AutoEventWireup="false"Codebehind="GeneralTemplate.ascx.cs"...
Error when using ajax component
Error : The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.Exception Details: System.Web.HttpException:...
Error connecting to undo manager of source file
Error : Error connecting to undo manager of source file.This error occur when debugging a web application on asp.net.Solution :1. Delete the aspx.designer.cs file2. Right-click the aspx, select convert to web application.There are 3 layers (that's how I call it) on asp.net web application, i.e. Design layer(.aspx), Coding layer(.cs), and the other...
Username & Password requested when downloading
Problem : When downloading a file, username and password is requested.Solution : If I'm not mistaken, I used impersonation on the web, so have to grant permission on the IIS. Go to control panel -> Administrative Tools -> Internet Information Services. Or simply press window + Run, then type inetmgr.Right-click Default Web Site, properties, go...
Can't access local web aplication from another computer
Error : No error, it's just that local web application can not be accessed from another computer.Solution : go to control panel -> windows firewall -> add port :Name : HTTPPort Number : 80Type : TCPe.g.Accessing web from local : http://localhost/webName/Default.aspxWhen accessing from another computer, just use the ip address of the computer...
Error displaying report
Error : C:\DOCUME~1\STEVEN~1\ASPNET\LOCALS~1\Temp\temp_c31eb8a4-2e63-4b42-b43d-c91550cca5b4 {25A8AD89-FCF3-4B82-A544-375DE1838F98}.rpt: Unable to connect: incorrect log on parametersThis problem is quite typical, and happen under some typical conditions. I was using crystal report to view a report on a web page, and the connection used for the report...
Assemblies / DLL not included
Error : One or more Assemblies / DLL have not been included...I forgot the exact error message, but it should include those words. This error is caused by the unavailability of one or more DLLs when deploying.Solution : Some DLLs, that are imported components, are usually not copied to deployment folder. To make them copied when creating deployment...
File has not been pre-compiled
Error : The file '/Web/Default.aspx' has not been pre-compiled, and cannot be requested.
I used WebDeployment program to compile the web on release mode.
Solution : Re-copy the compiled files. This problem usually occurs when deploying pre-compiled web. Maybe missed some files while copying the files. Try re-copy the compiled fil...
Wednesday, April 22, 2009
Error when creating deployment project
Error : The target directory could not be deleted. Please delete it manually, or choose a different target.File : ASPNETCOMPILERSolution : Delete publish folder (the folder where the published web is located), then try compiling in release mode aga...
Problem with server / Web Service
Error : No connection could be made because the target machine actively refused itSolution : If you use web service or get data from a server, check whether the web service is working properly, or the connection to the server is availab...
Friday, April 17, 2009
Check whether a file exists or not
This is actually a simple code, but someones may not know it when first using VB, so I post it here.Here's the code to find a file named file.txt:If Dir(App.Path & "\file.txt") <> "" Then MsgBox "Found: file.txt"End...
How to detect running program
Make a module and use the functionality of API to make it work.Code in the module:Option ExplicitPrivate Declare Function GetWindowText Lib "user32.dll" Alias "GetWindowTextA" _(ByVal hwnd As Long, ByVal lpString As String, ByVal nMaxCount As Long) As LongPrivate Declare Function EnumWindows Lib "user32.dll" _(ByVal lpEnumFunc As Long, ByVal lParam...
How to clear all textboxes in a form
Sometimes, when we use a lot of textboxes in a form, and want to clean all the textboxes the form, it's not efficient to clean it one by one by using Text1.Text = "", Text2.Text = "", etc.There is a short way to do it:Dim a As ControlFor Each a In Form1 If TypeOf a Is TextBox Then a.Text = "" End IfN...
Wednesday, April 15, 2009
Get file name from a path in VB
One of my friend once asked how to get file name from a path. There're actually a lot of ways to do it. I'll try a simple one, using Split and UBound function.e.g. the path is C:\Test\DeeperPath\EvenDeeperPath\Test.txtand we're going to get the file name, i.e. Text.txtThe name of the controls:textbox : Text1, containing the pathSome things we have...
Connecting Crystal Report and VB using TTX
I'd like to share how to make a report using Crystal Report, and connect it from VB here, since there has been several friends asking about this.There are actually several ways to connect VB and Crystal Report, ones of which that I've ever used are using TTX and ODBC.I'd like...
