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

You can call Show() method during postback to prevent the modal popup window from closing

MyModalPopoupExtender.Show()

Answer 2

Following previous case...

In Simple.aspx, user has to enter the name of a company. If user don't remember name of the company, he can click a button which will open a pop up modal window.

what I want to do in the modal window is permit the user to do a search of a list of companies. He can enter a partial name and click search. Matches will be shown in a list below. He can click in an item of the list and return. If company does not exist, he can click a button 'New' to create a new company.

So, as you can see, I want a lot of functionality in this modal window.

Thanks!

JC

Answer 3

Like you prolly already know, the modal popup is clientside only, yeah you can gather informations in it during the postback, but if you do a postback he will hide 100% of the time.

Of course, like other proposed, you can do a .show during the postback, but it depends on what you need to do.

Actually, I don't know why you need a postback, if it's for some validations try to do them clientside.

Could you tell us why you need to do a postback, maybe we could help you better ! :)

Answer 4

Put you controls inside the update panel. Please see my sample code, pnlControls is control that holds controls that will be displayed on popup:

<asp:Panel ID="pnlControls" runat="server">

    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
        <ContentTemplate>
               <asp:Button ID="TestButton" runat="server" Text="Test Button" onclick="TestButton_Click" />
            <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>         
        </ContentTemplate>

    </asp:UpdatePanel>

This will do the job for you :)

Best regards, Gregor Primar

Answer 5

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

Answer 6

protected void Page_Load(object sender, EventArgs e)
{
    if (Page.IsPostBack)
    {
        // reshow
        MyModalPopup.Show()
    }
}