Question

I am programatically making some LinkButtons, and they worked fine for a while, but now the events aren’t firing and I can’t figure out why?

This is what makes the button:

protected void MakeUploadButton(attachment a, PlaceHolder ph) {     LinkButton lb = new LinkButton()     {         Text = 'Upload New ' + a.attachment_type.type_name,         CssClass = 'button right',         ID = 'lb' + a.attachment_type.file_tag,         CommandArgument = a.attachment_type_id.ToString(),         CommandName = a.attachment_type.type_name,         CausesValidation = false     };     lb.Click += new EventHandler(showModalPopup);     lb.DataBind();     ph.Controls.Add(lb); } 

ShowModalPopup exists and all, but when I run it in Debug, nothing inside of it ever fires… for some reason, it is not getting called. Any ideas?

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found my answer here: http://bytes.com/groups/net-asp/329287-linkbutton-event-not-firing

Answer 1

It’s because .NET nukes an elements event handlers on postback if they aren’t set in viewstate. All you need to do is re-attach the eventhandler in the onload event.

Protected Sub Page_Load(sender As Object, e As EventArgs) Handles MyBase.Load    If Page.IsPostBack Then       Dim lb as ListButton = TryCast(Page.FindControl('IDOfControl'), LinkButton)       lb.Click += new EventHandler(showModalPopup);    End If End Sub