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Programmatically Register Client-Side JavaScript

/ Published in: VB.NET
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Gets a ClientScriptManager reference from the Page class. If the client script is not already registered on the page, builds and registers a script. Useful for building a script dynamically and ensuring that it gets registered during the correct stage of the page life cycle.

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  1. Private Sub RegisterJavascript()
  2.     ' Define the name and type of the client scripts on the page.
  3.     Dim ClientScriptName As String = "LinkClick"
  4.     Dim PageType As Type = Me.GetType()
  5.  
  6.     ' Get a ClientScriptManager reference from the Page class.
  7.     Dim csm As ClientScriptManager = Page.ClientScript
  8.  
  9.     ' Check to see if the client script is already registered.
  10.     If (Not csm.IsClientScriptBlockRegistered(PageType, ClientScriptName)) Then
  11.         Dim ClientScriptText As New StringBuilder()
  12.         ClientScriptText.AppendLine("function ToAccountDetails(un) {")
  13.         ClientScriptText.AppendLine("  document.getElementById(""UserName"").value = un;")
  14.         ClientScriptText.AppendLine("  document.getElementById(""frmToAccountDetails"").submit();")
  15.         ClientScriptText.AppendLine("}")
  16.  
  17.         csm.RegisterClientScriptBlock(PageType, ClientScriptName, ClientScriptText.ToString(), True)
  18.     End If
  19.  
  20. End Sub

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