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troubleshooting Question

Alert messages in asp.net

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12 Comments1 Solution826 ViewsLast Modified:
I attched file. like this it is coming. i want  my project form as background in place of white screen.iam using update panel also. in cs iam writing this code for alert message

ScriptManager.RegisterClientScriptBlock(this, typeof(Page), "alert", "alert('Invalid file')", true);


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