Calling Javascript Alert from aspx.cs file

 

ScriptManager.RegisterStartupScript(this, typeof(UpdatePanel), “Myscript”, “alert(‘Can not delete logged in user.’);”, true);

//string  myscript = “function Hello() { alert(‘Hi’);}”;

//Page.ClientScript.RegisterClientScriptBlock(this.GetType(), “MyScript”, myscript, true);          

//ScriptManager.RegisterClientScriptBlock(this, typeof(Page), “Myscript”, myscript, true);