The most popular response is “
ScriptManager.RegisterStartupScript” however, that does not work in my situation.
So I am doing something like
How do I call this function from my vb.net class?
If DataStore.Record.Exists(theRecord) Then Dim script As String = "alert('Record exists')" If Not Page.ClientScript.IsStartUpScriptRegistered(Me.GetType(), "alertscript") Then Page.ClientScript.RegisterStartUpScript(Me.GetType(), "alertscript", script, True) End If End If
you would do it like above, where you should replaceDataStore.Record.Exists(theRecord) with condition that checks database record exists
If you were doing a full page postback, a crude way of achieving it would be to assign the script or function to a
Literal control, which renders its
Text property on the HTML page exactly as written.
Then, your script will execute at the point the
Literal is rendered.
A neater way of doing it is to add your script to the page via a
ScriptManager as you noted. Rather than a
StartupScript, you could try using
.RegisterClientScriptBlock() instead? You don’t mention what it is about your situation that doesn’t work?
The most comprehensive way of doing it would be to use AJAX – either .NET’s built-in framework, or jQuery. jQuery’s AJAX (and AJAX in general) is a separate topic, which you can read about here.