Follow up to posting on preventing double click...

M

mike55

Contributor
Joined
Mar 26, 2004
Messages
727
Location
Ireland
Hi all

Here is the best solution that I have come across for preventing double clicks...

1. Create a module, and call it GlobalModule.

2. Add the following method/function...
Code: 
    Public Sub ButtonClickEventGovenor(ByVal btn As System.Web.UI.WebControls.Button, ByVal PageHasValidators As Boolean)
        Dim sJavaScript As String

        If PageHasValidators Then
            sJavaScript = "if (typeof(Page_ClientValidate) == 'function') {if (Page_ClientValidate())" & _
            "{this.value='Please wait...';this.disabled = true;" & _
            btn.Page.GetPostBackEventReference(btn) & ";}}"
        Else
            sJavaScript = "this.value='Please wait...';this.disabled = true;" & _
            btn.Page.GetPostBackEventReference(btn)
        End If

        btn.Attributes.Add("onclick", sJavaScript)
    End Sub

3. Every page that you need to prevent a double click, do the following.
3a. declare a global variable: dim pBackHandler as new GlobalModule
3b. add the following line into the page load method:
Code: 
Call pBackHandler.ButtonClickEventGovenor(btnAdd, PageHasValidators:=True)

If the page has no validators, just set the variable PageHasValidators to false.

The question that I have now, is how can I throw up a javascript messagebox or confirmation dialog and use it?

Mike55.
 
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