UserControl Disappear after postback

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Hi all,

I am loading usercontrol dynamically, which works fine, but anytime i click a button on the usercontrol it disappears below are my codes:

Dim meetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx")
Dim subMeetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-SubCouncilMeetingSetup.ascx")

Protected Sub meetingTypeButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles meetingTypeButton.Click
meetingSetupPlaceHolder.Controls.Clear()
meetingtypeControl.ID = "UC1"
meetingSetupPlaceHolder.Controls.Add(meetingtypeControl)
End Sub
Protected Sub subMeetingTypeButton_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles subMeetingTypeButton.Click
meetingSetupPlaceHolder.Controls.Clear()
subMeetingtypeControl.ID = "UC2"
meetingSetupPlaceHolder.Controls.Add(subMeetingtypeControl)
End Sub
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Page.IsPostBack = False Then
Dim meetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx")
meetingSetupPlaceHolder.Controls.Add(meetingtypeControl)
End If
End Su
b

Posted 7-Oct-10 0:00am

Adesina Mark

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NMehta83 · Answer 1 · 2010-10-07T00:07:00

Solution 1

Please replace below code.

VB

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

Dim meetingtypeControl As Control = LoadControl("~/Modules/CouncilAndGeneralAffairs/WebUserControls/Settings-CouncilMeetingType.ascx")
meetingSetupPlaceHolder.Controls.Add(meetingtypeControl)

End Sub

Please Vote if this helped you then.

Posted 7-Oct-10 0:07am

NMehta83

Comments

Adesina Mark 7-Oct-10 6:15am

It works when it loads under pageload, but when i load it under button_click event that is when it disappear after any postback. Any suggestion of the cause?

NMehta83 7-Oct-10 6:26am

That is why i removed your condition Page.IsPostBack = False. So please replace the code and check it again.

Suthish Nair · Answer 2 · 2010-10-07T00:32:00

C++

Every PostBack is a new Request.You need to add the Control with each PostBack

C#

private void Page_Load(object sender, EventArgs e)
{
   // Dynamically load the control here
   if (!Page.IsPostBack)
   {
    // Do dynamic initialization of controls 
       which need such initialization only once
   }
}

you can also refer this discussion: http://forums.asp.net/t/1186195.aspx[^]