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ASP.NET web page goes blank with JavaScript alert()

, 13 Oct 2011 CPOL
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Here simpler version. Using the 2nd overload method[^](parameter addScriptTags) you can reduce the code.private void ShowMessage(string Message){ if (!ClientScript.IsClientScriptBlockRegistered("MyMessage")) { ClientScript.RegisterClientScriptBlock(this.GetType(), "MyMessage",...
This is an old version of the currently published tip/trick.
Here simpler version. Using the 2nd overload method[^](parameter addScriptTags) you can reduce the code.
private void ShowMessage(string Message)
  if (!ClientScript.IsClientScriptBlockRegistered("MyMessage"))
    ClientScript.RegisterClientScriptBlock(this.GetType(), "MyMessage", Message, true);
public void btnTest_Click(Object sender, EventArgs e)
  ShowMessage("alert('Hello World');");
For AJAX - Updatepanel, use the below one
ScriptManager.RegisterClientScriptBlock(this.Page, typeof(UpdatePanel), "MyMessage", Message, true);

Further Reading

ClientScriptManager.RegisterClientScriptBlock Method[^]
ScriptManager.RegisterClientScriptBlock Method[^]


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GeneralReason for my vote of 1 The user will need to pass the hardc... Pin
Balaji Birajdar14-Oct-11 5:42
memberBalaji Birajdar14-Oct-11 5:42 
GeneralRe: I agree that I forgot to add the alert keyword in the genera... Pin
thatraja14-Oct-11 5:57
mvpthatraja14-Oct-11 5:57 
GeneralRe: Reason for my vote of 1The user will need to pass the hardc... Pin
junaidcodeproject22-Aug-13 20:31
memberjunaidcodeproject22-Aug-13 20:31 

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