<%@ Page Language="VB" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
' Define the name and type of the client scripts on the page.
Dim csname1 As String = "PopupScript"
Dim csname2 As String = "ButtonClickScript"
Dim cstype As Type = Me.GetType()
' Get a ClientScriptManager reference from the Page class.
Dim cs As ClientScriptManager = Page.ClientScript
' Check to see if the startup script is already registered.
If (Not cs.IsStartupScriptRegistered(cstype, csname1)) Then
Dim cstext1 As String = "alert('Hello World');"
cs.RegisterStartupScript(cstype, csname1, cstext1, True)
End If
' Check to see if the client script is already registered.
If (Not cs.IsClientScriptBlockRegistered(cstype, csname2)) Then
Dim cstext2 As New StringBuilder()
cstext2.Append("<script type=""text/javascript""> function DoClick() {")
cstext2.Append("Form1.Message.value='Text from client script.'} </")
cstext2.Append("script>")
cs.RegisterClientScriptBlock(cstype, csname2, cstext2.ToString(), False)
End If
End Sub
</script>
<html >
<head>
<title>ClientScriptManager Example</title>
</head>
<body>
<form id="Form1"
runat="server">
<input type="text" id="Message" /> <input type="button" value="ClickMe" onclick="DoClick()" />
</form>
</body>
</html>