How do I prevent the closing of modal popup window(ModalPopupExtender) on postback?

Question

I\'m using Microsoft AjaxControlToolkit for modal popup window.

And on a modal popup window, when a postback occurred, the window was closing. How do I prevent from

Answer 1

Was having this same problem keeping a modal open during postbacks.

My solution:

Use EventTarget to determine if the postback is coming from a control in the modal and keep the model open if it is. The postback can come from a control in the modal iff the modal is open.

In the load event for the page control containing the modal. Determine if the postback is from a child of mine. Determine if it is from the control that is in the modal panel.

    Protected Sub Control_Load(sende As Object, e As EventArgs) Handles Me.Load
        If IsPostBack Then
            Dim eventTarget As String = Page.Request.Params.Get("__EventTarget")
            Dim eventArgs As String = Page.Request.Params.Get("__EventArgument")

            If Not String.IsNullOrEmpty(eventTarget) AndAlso eventTarget.StartsWith(Me.UniqueID) Then
                If eventTarget.Contains("$" + _credentialBuilder.ID + "$") Then
                    ' Postback from credential builder modal.  Keep it open.
                    showCredentialBuilder = True
                End If
            End If
        End If
    End Sub

In prerender check my flag and manually show the modal

    Protected Sub Control_PreRender(ByVal sende As Object, ByVal e As EventArgs) Handles Me.PreRender
        If showCredentialBuilder Then
            _mpeCredentialEditor.Show()
        End If
    End Sub