In this article I will explain with an example, how to display exception (error) Message details using JavaScript Alert MessageBox in ASP.Net using C# and VB.Net.
Exception details such as Message, StackTrace, TargetSite and Source will be displayed using JavaScript Alert MessageBox in ASP.Net.
HTML Markup
The following HTML Markup consists of an ASP.Net Button control which will raise an Exception and the exception (error) Message details will be displayed.
<asp:Button Text="Click to Raise Exception" runat="server" OnClick="RaiseException" />
Display Exception (Error) Message details using JavaScript Alert MessageBox in ASP.Net
The following event handler is raised when the Button is clicked. An exception is raised by converting a string value to integer inside a Try-Catch block.
The raised Exception is caught in the Catch block and the details of the exception (error) are displayed using JavaScript Alert MessageBox.
C#
protected void RaiseException(object sender, EventArgs e)
{
try
{
int i = int.Parse("Mudassar");
}
catch (Exception ex)
{
string message = string.Format("Message: {0}\\n\\n", ex.Message);
message += string.Format("StackTrace: {0}\\n\\n", ex.StackTrace.Replace(Environment.NewLine, string.Empty));
message += string.Format("Source: {0}\\n\\n", ex.Source.Replace(Environment.NewLine, string.Empty));
message += string.Format("TargetSite: {0}", ex.TargetSite.ToString().Replace(Environment.NewLine, string.Empty));
ClientScript.RegisterStartupScript(this.GetType(), "alert", "alert(\"" + message + "\");", true);
}
}
VB.Net
Protected Sub RaiseException(sender As Object, e As EventArgs)
Try
Dim i As Integer = Integer.Parse("Mudassar")
Catch ex As Exception
Dim message As String = String.Format("Message: {0}\n\n", ex.Message)
message &= String.Format("StackTrace: {0}\n\n", ex.StackTrace.Replace(Environment.NewLine, String.Empty))
message &= String.Format("Source: {0}\n\n", ex.Source.Replace(Environment.NewLine, String.Empty))
message &= String.Format("TargetSite: {0}", ex.TargetSite.ToString().Replace(Environment.NewLine, String.Empty))
ClientScript.RegisterStartupScript(Me.GetType(), "alert", "alert(""" & message & """);", True)
End Try
End Sub
Screenshot
![Display Exception (Error) Message details using JavaScript Alert MessageBox in ASP.Net]()
Demo
Downloads
