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only takes a minute: Sign up How to display an error message box in a web application asp.net c# up vote 7 down vote favorite 2 I have an ASP.NET web application, and I wanted to know how I could asp net messagebox display an error message box when an exception is thrown. For example, try { do something } catch { messagebox.write("error"); //[This isn't the correct syntax, just what I want to achieve] } [The message box shows the error] Thank you c# asp.net web-applications messagebox share|improve this question edited Mar 16 '09 at 18:46 asked Mar 16 '09 at 18:22 zohair 97692137 add a comment| 8 Answers 8 active oldest votes up vote 11 down vote accepted You can't reasonably display how to display error message in asp net using c# a message box either on the client's computer or the server. For the client's computer, you'll want to redirect to an error page with an appropriate error message, perhaps including the exception message and stack trace if you want. On the server, you'll probably want to do some logging, either to the event log or to a log file. try { .... } catch (Exception ex) { this.Session["exceptionMessage"] = ex.Message; Response.Redirect( "ErrorDisplay.aspx" ); log.Write( ex.Message + ex.StackTrace ); } Note that the "log" above would have to be implemented by you, perhaps using log4net or some other logging utility. share|improve this answer edited Mar 16 '09 at 18:49 answered Mar 16 '09 at 18:25 tvanfosson 351k65571700 Upvoted for saying what I was trying to say. –Bobby Cannon Mar 16 '09 at 18:28 @tvanfosson - It is not that they cannot display message box on server side or client side. They should just avoid doing so. :) –Ramesh Mar 16 '09 at 18:38 @Ramesh -- clarified. –tvanfosson Mar 16 '09 at 18:51 add a comment| up vote 12 down vote You cannot just call messagebox.write cause you are disconnected from the client. You should register javascript code that shows a messagebox: this.RegisterClientScriptBlock(typeof(string), "key", string.Format("alert('{0}');", ex.Message), true); share|improve this answer answered Mar 16 '09 at 18:26 Michiel Overeem 2,21721624 I prefer a separate error page if the exception would cause problems with th
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removed. You’ll be auto redirected in 1 second. MSDN Library MSDN Library MSDN Library MSDN Library Design Tools Development Tools and Languages Mobile and Embedded http://stackoverflow.com/questions/651592/how-to-display-an-error-message-box-in-a-web-application-asp-net-c-sharp Development .NET Development Office development Online Services Open Specifications patterns & practices Servers and Enterprise Development Speech Technologies Web Development Windows Desktop App Development TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is https://msdn.microsoft.com/en-us/library/994a1482.aspx not being maintained. How to: Display Safe Error Messages Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 .NET Framework 3.0 Visual Studio 2005 When your application displays error messages, it should not give away information that a malicious user might find helpful in attacking your system. For example, if your application unsuccessfully tries to log in to a database, it should not display an error message that includes the user name it is using. There are a number of ways to control error messages, including the following: Configure the application not to show verbose error messages to remote users. (Remote users are those who request pages while not working on the Web server computer.) You can optionally redirect errors to an application page. Include error handling whenever practical and construct your own error messages. In your error handler, you can test to see whether the use
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