我可以添加ASP吗。NET AJAX以编程方式扩展到页面(服务器端)?

在页面中,在加载事件上,我动态创建控件以在页面上显示。这一切都正常工作。我遇到的麻烦是在从AJAX控制工具包中添加扩展程序时,特别是我试图向按钮控件添加圆角。不会抛出错误,但AJAX扩展功能不会出现在显示的页面中。

有人知道我做得不对,或者是否有可能?

Dim container As HtmlGenericControl
Dim edit As Button
Dim editRoundedCorners As AjaxControlToolkit.RoundedCornersExtender 

For each item in items
            container = New HtmlGenericControl("div")
            container.ID = "container_" & item.code

            edit = New Button()
            edit.ID = "edit_" & item.code
            edit.Text = "Edit"
            edit.Style("padding") = "0 0 0 4px"
            edit.SkinID = "smallEditButton"

            editRoundedCorners = New AjaxControlToolkit.RoundedCornersExtender()
            editRoundedCorners.BorderColor = edit.BorderColor
            editRoundedCorners.ID = edit.ID & "_RoundedCorners"
            editRoundedCorners.Corners = AjaxControlToolkit.BoxCorners.All
            editRoundedCorners.Radius = 3
            editRoundedCorners.TargetControlID = edit.ID

            container.Controls.Add(editRoundedCorners)
            container.Controls.Add(edit)
            pageContainer.Controls.Add(container)
Next

(pageContainer是页面上的一个div)