On Error Resume Next In Asp.net
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bashaApril 18, 20100 Share 0 0 Syed Aslam Basha here from the Information Security Tools Team. We have “On Error Resume Next” feature in VB.NET, which simply means during execution if error occurs with the current code step just go to next code step by passing the error. As such there is no “On Error Resume Next” in C#, but we can achieve the same using try catch statements tactically as https://msdn.microsoft.com/en-us/library/5hsw66as.aspx ; 1: try 2: { 3: File.Delete(FileNameWithPath); 4: } 5: 6: catch() 7: { 8: // do nothing 9: } A difference is still that in C# this works only for a single statement. You would need to repeat the block for each statement. However, it is https://blogs.msdn.microsoft.com/syedab/2010/04/18/on-error-resume-next-in-c/ not a good practice. -Syed Aslam Basha (syedab@microsoft.com) Microsoft Information Security Tools (IST) Team Test Lead -------------------------------------- Please leave a comment if the blog post has helped you. Tags .NET Comments (0) Cancel reply Name * Email * Website Follow UsPopular TagsSoftware Testing Automation Information Security Tools VS 2010 C# Visual Studio CUIT CAT.NET XSS ASP.NET Performance testing how to .NET Microsoft Test Manager 2010 How to prevent XSS attacks using Microsoft Anti-XSS library SQL Injection Performance testing basics How to prevent XSS attacks using Microsoft Anti-XSS SRE Performance testing strategies Threat Modeling Securing web applications Archives January 2012(1) December 2011(1) November 2011(1) October 2011(1) September 2011(1) August 2011(1) July 2011(1) June 2011(1) May 2011(1) April 2011(1) All of 2012(1) All of 2011(12) All of 2010(27) All of 2009(33) Privacy & Cookies Terms of Use Trademarks © 2016 Microsoft
Forums Links DISCUSSIONARCHIVES DISCUSSIONARCHIVES2 DISCUSSIONARCHIVES3 BLOG We didn't realize the site was so popular. Other Stuff How To Use On Error Resume Next Often when http://www.powerasp.net/content/new/on-error-resume-next.asp using ASP or Active Server Pages with VBScript you will find it necessary to check for errors when you do certain things that may fail and then handle it accordingly. Things like opening a database connection http://www.vbforums.com/showthread.php?364099-What-s-the-equivalent-of-VB-On-Error-Resume-Next-in-C or writing to a text file come to mind. Generally if an error is encountered in your .asp file, the processing of your script stops and an error message is returned to the browser. If on error you want to continue processing your page even if an error is encountered, include the following line at the beginning of your .asp file: <% On Error Resume Next %> That being said just ignoring errors in your code is not a very good idea. What you really want to do is handle the error in some way. The example below opens a database connection and shows you how to trap a on error resume potential error and do whatever you want because of it. In this case we are simply displaying the error. <% ConnectionString = "DBQ=c:\inetpub\wwwroot\mysite\data\mydatabase.mdb;Driver={Microsoft Access Driver (*.mdb)};" '*** This code checks the ConnectionString info you entered and reports back the error code if it is not ok Err.Clear On Error Resume Next Set ConnPasswords = Server.CreateObject("ADODB.Connection") ConnPasswords.Open ConnectionString If Err.Number <> 0 Then Response.Write (Err.Description& "
") Response.Write("This means there is most likely a problem with the" & vbCrLf) Response.Write("""ConnectionString"" info that you specified.
" & vbCrLf) Response.End End If On Error GoTo 0 %> We put the "On Error GoTo 0 at the end because that will essentially end the "on error resume next" That is something you want to do so any later errors in your application do not get ignored without you knowing about it. Below is another example. In this example our application logs user info in a text file when they sign in to a site. We add "On Error Resume Next" here simply so no nasty error message come up if by chance write permissions to the text file do not exist. <% Set ObjMyFile = CreateObject("Scripting.FileSystemObject") Err.Clear On Error Resume Next LogFileName = "aspprotect.log" LogFileDirectory = "c:\somedirectory" 'Open Text Fil
this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. Results 1 to 16 of 16 Thread: What's the equivalent of VB On Error Resume Next in C#? Tweet Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Oct 5th, 2005,09:30 AM #1 vincentg View Profile View Forum Posts Thread Starter Hyperactive Member Join Date Jun 2005 Location Chicago IL, USA Posts 261 What's the equivalent of VB On Error Resume Next in C#? What's the equivalent of VB On Error Resume Next in C#? Thanks.. Oct 5th, 2005,10:10 AM #2 wossname View Profile View Forum Posts Visit Homepage type Woss is new Grumpy; Join Date Aug 2002 Location #!/bin/bash Posts 5,683 Re: What's the equivalent of VB On Error Resume Next in C#? There isn't one, thankfully. I don't live here any more. Oct 5th, 2005,10:27 AM #3 vbPoet View Profile View Forum Posts Fanatic Member Join Date Feb 2005 Location Searching .. Posts 669 Re: What's the equivalent of VB On Error Resume Next in C#? You have to try and Catch statements. Oct 5th, 2005,10:37 AM #4 mendhak View Profile View Forum Posts Visit Homepage ASP.NET Moderator Join Date Feb 2002 Location Ulaan Baator GooGoo: Frog Posts 38,174 Re: What's the equivalent of VB On Error Resume Next in C#? Ah, the bane of Visual Basic programming. I hope not to see it soon. Mendhak.com|Flickr|Github|GPS Logger for Android| Oct 5th, 2005,10:41 AM #5 GlenW View Profile View Forum Posts Hyperactive Member Join Date Nov 2001 Location Gateshead, England Posts 479 Re: What's the equivalent of VB On Error Resume Next in C#? Originally Posted by vincentg What's the equivalent of VB On Error Resume Next in C#? Good coding! Oct 5th, 2005,10:43 AM #6 wossname View Profile View Forum Posts Visit Homepage type Woss is new Grumpy; Join Date Aug 2002 Location #!/bin/bash Posts 5,683 Re: What's the equivalent of V