Assign Different ValidationGroup For Each Instance of User Control

How about adding a Validation Group property to your usercontrol?  Then assign that value to the validationgroup property for your inner controls when the control is loaded.

@anoyes

How would I go about doing that.  I understand how to make a property for my control, however I am having trouble programatically assigning the validation group.  Could you provide a code example?

@anoyes

Thanks for the help!  The problem I'm now having is that the TextBox and RequiredFieldValidators that I want to get to are inside of a ListView InsertItemTemplate.  How would I set these properties dynamically?

You have to add a function to the ItemDataBound event of the list view that looks a little like this.  I think that should do the trick.

    Protected Sub ListView1_ItemDataBound(ByVal sender As Object, ByVal e As ListViewItemEventArgs) Handles ListView1.ItemDataBound
        DirectCast(e.Item.FindControl("TextBox1"), TextBox).ValidationGroup = Me._ValidationGroup
        DirectCast(e.Item.FindControl("RequriedFieldValidator1"), RequiredFieldValidator).ValidationGroup = Me._ValidationGroup
        DirectCast(e.Item.FindControl("Button1"), Button).ValidationGroup = Me._ValidationGroup
    End Sub

Select allOpen in new window

@anoyes

This is exactly what I've been trying, however I get an " Object reference not set to an instance of an object." error.  Here is the stack trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   Controls_CustomerContactListView.CustomerContactsBillingListView_ItemDataBound(Object sender, ListViewItemEventArgs e) in C:\Sites\Amp360\Controls\CustomerContactListView.ascx.vb:24
   System.Web.UI.WebControls.ListView.OnItemDataBound(ListViewItemEventArgs e) +108
   System.Web.UI.WebControls.ListView.CreateItemsWithoutGroups(ListViewPagedDataSource dataSource, Boolean dataBinding, InsertItemPosition insertPosition, ArrayList keyArray) +716
   System.Web.UI.WebControls.ListView.CreateChildControls(IEnumerable dataSource, Boolean dataBinding) +776
   System.Web.UI.WebControls.ListView.PerformDataBinding(IEnumerable data) +33
   System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +114
   System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +31
   System.Web.UI.WebControls.DataBoundControl.PerformSelect() +142
   System.Web.UI.WebControls.ListView.PerformSelect() +57
   System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +73
   System.Web.UI.WebControls.BaseDataBoundControl.EnsureDataBound() +82
   System.Web.UI.WebControls.BaseDataBoundControl.OnPreRender(EventArgs e) +22
   System.Web.UI.Control.PreRenderRecursiveInternal() +80
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Control.PreRenderRecursiveInternal() +171
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +842

Thanks for continuing to follow this.

Hmm I was hoping that'd work.  It must be because the control isn't on the page until you actually hit the button to insert a row.  What about adding something to the control that triggers the 'Insert' mode on the ListView?

If that doesn't work, or you need help w/ that, can you post your code.

@anoyes

I ended up just removing the code to insert a new record outside of the ListView and used your existing code from above.  Thanks for the help!