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AutoComplete Issues

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ListControl

This is a migrated thread and some comments may be shown as answers.

17 Answers, 1 is accepted

Accepted

answered on 03 Nov 2011, 11:38 AM

Hi David,

There is no workaround for the issue and this is why Peter did not share it here. The solution that we provided to the customer was in the form of a special build that addresses the issue, but since the build was for licenses users only, we could not make it publicly available in our forums.

Still, please note that the issue has been addressed in Q3 2010, while our latest version is Q2 2011 SP1. In order words, the issue is addressed in Q2 2011 SP1 as well. If you have a scenario which we missed to check while addressing the issue, I would kindly ask you to open a new support ticket and send us a sample project which demonstrates your case. This will allow us to consider your scenario as well and address the issue in a future release.

Regards,
Nikolay
the Telerik team

Q2’11 SP1 of RadControls for WinForms is available for download (see what's new); also available is the Q3'11 Roadmap for Telerik Windows Forms controls.

answered on 03 Nov 2011, 12:17 PM

The issue hasn't been addressed in the 2011.2.11.831 build - the control, when selecting from an unbound list, still allows for the entry of whatever text the user would like.

Steps to reproduce:

Create a form.
Add a RadDropDownList to the form.
Add a RadTextBox to the form.
Add the following code behind the form:

    Private Sub Form_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        Dim a() As String = {"Test 1", "Test 2", "Test 3", "Test 4"}
        With Me.RadDropDownList1
            .AutoCompleteMode = AutoCompleteMode.SuggestAppend
           .SelectedIndex = -1
           .SelectedText = ""
           .Items.Clear()
            .Items.AddRange(a)
       End With
   End Sub

Type "asdf" into the RadDropDownList
Press tab.
Text "asdf" remains in the list; autocomplete was never engaged; the control appears valid, even though nothing has been selected.

Please direct me to whatever build is required to address this issue, as it isn't available to me that I can see (and I've purchased the controls).

answered on 03 Nov 2011, 12:47 PM

Hello David,

Thank you for writing back.

Please note that the scenario that you have and the original scenario described by Andrew are actually different. Here is the Andrew's scenario:
1. You have a DropDownList filled with countries: Usa, Canada, Spain, France.
2. You type the letter "U". There is a record that starts with "U" in the list of records.

In the versions prior to Q3 2010, if you tab off the DropDownList after the letter "U" is typed, "USA" is not selected which is an issue. We addressed this issue in the custom build sent to the client and in the Q3 2011 SP1.

Here is your case:
1. You have a DropDownList filled with countries: Usa, Canada, Spain, France.
2. You type "T" (for example, for Taiwan). However, there is no record starting with "T", so the AutoComplete feature is not engaged.
3. You tab off the DropDownList and the text "T" remains in the RadDropDownList.

Point 3) of your scenario is not an issue, but is the way RadDropDownList should behave. We are following the behavior of the Microsoft ComboBox control which behaves the same way.

I hope this clarifies the case and the difference between your scenario and the scenario that Andrew had.

Best wishes,
Nikolay
the Telerik team

Q2’11 SP1 of RadControls for WinForms is available for download (see what's new); also available is the Q3'11 Roadmap for Telerik Windows Forms controls.

answered on 08 Nov 2011, 04:28 PM

The problem with changing the style is that it doesn't allow autocomplete, which we do want. I've sort-of got it working to limit to list by the following code:

    ''' <summary>
   ''' Adds event handlers for various combobox events
   ''' </summary>
   ''' <remarks></remarks>
   Private Sub AddHandlers()
       AddHandler cboMain.LostFocus, AddressOf HandleCBOEvent
       AddHandler cboMain.Click, AddressOf HandleCBOEvent
       AddHandler cboMain.SelectedIndexChanged, AddressOf HandleCBOEvent
       AddHandler cboMain.TextChanged, AddressOf HandleCBOEvent
   End Sub

   ''' <summary>
   ''' Removes handlers for combobox events
   ''' </summary>
   ''' <remarks></remarks>
   Private Sub RemoveHandlers()
       RemoveHandler cboMain.LostFocus, AddressOf HandleCBOEvent
       RemoveHandler cboMain.Click, AddressOf HandleCBOEvent
       RemoveHandler cboMain.SelectedIndexChanged, AddressOf HandleCBOEvent
       RemoveHandler cboMain.TextChanged, AddressOf HandleCBOEvent
   End Sub

   <System.Diagnostics.DebuggerStepThrough()> _
   Private Sub HandleCBOEvent(ByVal sender As Object, ByVal e As System.EventArgs)
        '// Begin "limit to list" functionality
       If MyBase.DataTable Is Nothing Then Exit Sub
       If MyBase.Initializing = True Then Exit Sub
       '// Make sure we don't overflow with events, as we'll be tinkering
       RemoveHandlers()
       If String.IsNullOrEmpty(Me.cboMain.Text) Then
           '// make sure there's nothing selected
           Me.cboMain.SelectedIndex = -1
       ElseIf Not Me.cboMain.Items.Contains(Me.cboMain.Text) Then
           '// make sure there's nothing selected, and eat their text
            Me.cboMain.Text = ""
            Me.cboMain.SelectedIndex = -1
       End If
       '// End "limit to list" functionality
        '// Put the events back in place, as we're done tinkering
       AddHandlers()
       '// End "limit to list" functionality
    End Sub