Example:
Declare a JavaScript function in the head tag of your design file as shown below:
<head runat="server">
<title>Calling JavaScript From CodeBehind in asp.net file</title>
<script type="text/javascript">
function MyFunction() {
alert('Demonstration Successfull..');
}
</script>
</head>
In order to call it from code behind, use the following code in your Page_Load
protected void Page_Load(object sender, EventArgs e)
{
if (!ClientScript.IsStartupScriptRegistered("alert"))
{
Page.ClientScript.RegisterStartupScript(this.GetType(),
"alert", "MyFunction();", true);
}
}
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