Many types of Pop up message box in asp.net ?
Through JavaScript :
Default.aspx page code:
function ShowMessage()
{
alert("Doesn't have Data");
}
default.aspx.cs
ScriptManager.RegisterStartupScript(this, this.GetType(), "key", "ShowMessage()", true);
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2nd type on .cs
Default.aspx page code:
ClientScript.RegisterStartupScript(this.Page.GetType(), "", "<script type=\"text/javascript\">alert('Your Mgs');</script>");
third type:
Response.Write("<script>alert('Your Msg')</script>");