Display order of asp.net dynamic multiple instances user controls

hi
  when you the second one by default it will come the second
so what u have to do is to make some replacements
like
copy the first one added into a temporary object
add the second
then restore the first object and add it .....

Instead of using Add, use AddAt() which allows you to specify the index. 0 would put it at the top and move the other controls down a notch.
http://msdn.microsoft.com/en-us/library/system.web.ui.controlcollection.addat(v=VS.71).aspx

Hi

I think I may need a combination of both
Here is what I need to accomplish.
Lets say each newly added control represents a test run.
When the first one is added I check the db for the last test run
for that client then I add 1 to it.
 
So then user fills in test run hits save. test run is saved.
When user clicks add another test run I want to add another test run user control with the right number but still keep the first one on the page. I hope this is clear.

I'm not sure how to load an object or control with is data into memory then reload it

Need URGENT help please
Thanks for the time

You'll need to store the list of testruns to be stored in the ControlState, that way you can add the controls again dynamically when reloading the page. This is one of the most difficult subjects in the ASP.NET page lifecycle. If you search Google/Bing for "Dynamically created controls postback (viewstate OR controlstate)" you should find a lot of atricles pointing you in the right direction.

It basically comes down to the fact that you need to store enough information on the controls in the ControlState (or ViewState isa you're using an older version of the Framework) to restore the control tree upon postback. You only need to create the controls and give them the same ID as you gave them before the postback. The controls should then automatically load their values from the postback data and the viewstate/controlstate.

Thanks

I did some research but could not find anything on multiple instances of the same dynamic user control. control. and I still don't understand how I can load a control from viewstate or controlstate

Thanks.

Ok here is what I have
 

Protected Sub btnAddTestRun_Click(sender As Object, e As System.EventArgs) Handles btnAddTestRun.Click
        Dim testRunCtnl As UserControls_TestRun = CType(Page.LoadControl("~/UserControls/TestRun.ascx"), UserControls_TestRun)
        testRunCtnl.HeaderId = 12419 'pumpTestBO.PumpTestID
        testRunBO = New TestRunBO()
        testRunCtnl.TestNum = testRunBO.GetNewRunNumber(testRunCtnl.HeaderId)
        RunCouter += 1
        testRunCtnl.ID = "TestRun_" + RunCouter.ToString
        phTestRun.Controls.AddAt(0, testRunCtnl)
        TestRuns.Add(RunCouter)
    End Sub

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Click event of button

 

Protected Overrides Sub CreateChildControls()
        If Not TestRuns Is Nothing Then
            If TestRuns.Count > 0 Then
                TestRuns.Reverse()
                For Each testrun In TestRuns
                    'Dim control = DirectCast(UserControl.LoadControl("~/path/to/YourUserControl.ascx"), YourUserControl)
                    Dim testRunCtnl As UserControls_TestRun = CType(Page.LoadControl("~/UserControls/TestRun.ascx"), UserControls_TestRun)
                    testRunCtnl.ID = "TestRun_" & testrun
                    phTestRun.Controls.Add(testRunCtnl)
                Next
            End If
        End If
    End Sub

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ChildOverRide

 

Public ReadOnly Property TestRuns() As List(Of Integer)
        Get
            If ViewState("TestRuns") IsNot Nothing Then
                ViewState("TestRuns") = New List(Of Integer)()
            End If
            Return DirectCast(ViewState("TestRuns"), List(Of Integer))
        End Get
    End Property

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List

When I try TestRuns.Add(RunCounter) if errors Object reference not set to an instance of an object

not sure why

TestRuns is nothing Why?

If ViewState("TestRuns") IsNot Nothing Then
                ViewState("TestRuns") = New List(Of Integer)()
            End If

should be

If ViewState("TestRuns") Is Nothing Then
                ViewState("TestRuns") = New List(Of Integer)()
            End If