Adding event at runtime

I have the below code:

Dim r As Hashtable = Session.Item(SessionKeys

.RHash)

Dim rReverse As Hashtable = Session.Item(SessionKeys

.RReverseHash)

Dim extender As New

MultiHandleSliderExtender

Dim TargetControlTextBox As New

TextBox

TargetControlTextBox.ID =

"TargetControl_TextBox"

PlaceHolderExtender.Controls.Add(TargetControlTextBox)

extender.ID =

"223_multiHandleSliderExtenderTwo"

extender.BehaviorID = extender.ID

extender.Minimum = 0

extender.Maximum = r.Count - 1

extender.Length = 980

ExtenderZoom.minimum = 0

ExtenderZoom.Maximum = r.Count - 1

ExtenderZoom.Length = 980

BoundControlMin.Text = r(Session.Item(

SessionKeys

.TEMP_Start))

BoundControlMax.Text = r(Session.Item(

SessionKeys

.TEMP_End))

extender.TargetControlID = TargetControlTextBox.ID

extender.Orientation =

SliderOrientation

.Horizontal

extender.EnableHandleAnimation =

True

extender.ShowHandleDragStyle =

True

extender.ShowHandleHoverStyle =

True

AddHandler extender.OnClientValueChanged, AddressOf

ClientDragEnd_Extender

This last line doesn't work.

Error: Error 41 'OnClientValueChanged' is not an event of 'AjaxControlToolkit.MultiHandleSliderExtender'

Re: Adding event at runtime

Hello Mate,

Its client side event, u cannot have handler for this in server side.

Re: Adding event at runtime

Meaning, it is not possible to have events for the "extender" I have created? How can I add a multihandleslider(at run time) which is able to handle events?

My situation: I want the multihandleslider to add handles according to the list I get from database. Hence, I must add it during runtime. Also, is it possible to add multihandleslider in markup and add handlers at runtime?

Re: Adding event at runtime

Refer to:

Dim b As New Button
b.Text = "Click"
AddHandler b.Click, AddressOf ButtonClick
Placeholder1.Controls.Add(b)

http://msdn.microsoft.com/en-us/library/y3bwdsh3.aspx#Y2132

What is the difference between what I have and the example on the above link which adds a button click (client-side) event to a button added at run-time.

Re: Adding event at runtime

Oh dear, u can have handlers for the events of "extender" that u have created, but they should be in the client side (i.e., in Javascript) and not in server side (VB/C#). U could even do this (adding handlers in script) in runtime by injecting the script as below from ur aspx.vb/cs

protected override void OnPreRender(EventArgs e)
    {
        base.OnPreRender(e);
        var script = new StringBuilder();
        script.AppendFormat("function {0}_OnClientValueChanged(sender, eventArgs){{ ", this.UrMultiHandleSliderExtender.ClientID);
        script.AppendLine("alert('adasdasd');"); //replace this with wat actually u want to do
        script.AppendLine("}");

        this.ClientScript.RegisterClientScriptBlock(typeof(AjaxControlToolkit.MultiHandleSliderExtender),
            this.UrMultiHandleSliderExtender.ClientID + "OnClientValueChanged", script.ToString(), true);

        this.UrMultiHandleSliderExtender.OnClientValueChanged = string.Format("{0}_OnClientValueChanged", UrMultiHandleSliderExtender.ClientID);
    }

Re: Adding event at runtime

Please refer this

http://aspadvice.com/blogs/garbin/archive/2006/10/04/SliderExtender_3A00_-client_2D00_side-events-and-some-bug-fixes.aspx

http://weblogs.asp.net/abdullaabdelhaq/archive/2010/11/21/creating-custom-tooltip-ajax-extender-control.aspx