topic Re: combobox - vb.net - set default value to show in dropdown when loaded in ArcObjects SDK Questions

combobox - vb.net - set default value to show in dropdown when loaded

maxsteinbrenner — Thu, 03 Jan 2013 12:53:57 GMT

so i have a add-in combobox and would like it to have the text "select storm" in the (currently blank) dropdown when the combo box is displayed. is this possible?

thanks!

max

Re: combobox - vb.net - set default value to show in dropdown when loaded

KenBuja — Thu, 03 Jan 2013 13:43:49 GMT

You can set the combobox's text property to "Select storm". Once something is selected, that text will not show up again.

Re: combobox - vb.net - set default value to show in dropdown when loaded

maxsteinbrenner — Thu, 03 Jan 2013 14:00:21 GMT

You can set the combobox's text property to "Select storm". Once something is selected, that text will not show up again.

probably a dumb question but:

where would/how i access the text property of the combobox? i would know how to do it if i made the combobox in the designer but this one is an add-in and i am unfamiliar with how to access it's properties.

thanks,

max

Re: combobox - vb.net - set default value to show in dropdown when loaded

KenBuja — Thu, 03 Jan 2013 14:28:48 GMT

Not a dumb question at all, especially since I gave you an incorrect answer the first time.

In the Config.esriaddinx file, if you add a space to the Combobox line, you should get Intellisense to pop up, showing the possible tags you can add. Use hintText. The sample Custom Selection Extension shows this and other tags that you can use.

Re: combobox - vb.net - set default value to show in dropdown when loaded

maxsteinbrenner — Thu, 03 Jan 2013 14:54:29 GMT

Kevin,

awesome!

that is exactly what i was looking for, thanks so much.

max

Re: combobox - vb.net - set default value to show in dropdown when loaded

KenBuja — Thu, 03 Jan 2013 15:12:41 GMT

Glad to help. Please remember to click the check on the post to signify the question was answered.

Re: combobox - vb.net - set default value to show in dropdown when loaded

NeedHelp — Mon, 09 Sep 2013 18:50:42 GMT

What is the best way to either:
a.) have the default text re-appear after a combo item has been selected OR
b.) have the combo box value default to the first item in it's list??

Re: combobox - vb.net - set default value to show in dropdown when loaded

KenBuja — Mon, 09 Sep 2013 19:27:34 GMT

You can set the combobox to the first item in the list this way

myComboBox.SelectedIndex = 0

Re: combobox - vb.net - set default value to show in dropdown when loaded

NeedHelp — Tue, 10 Sep 2013 15:04:20 GMT

I don't see the .SelectedIndex as an option like I do with a 'normal combo box'.
All the interaction I have with the combo box add-in is done via the "me." command.
I can do me.add or me.remove to adjust combo box items, but definitely don't have the full list of options I'm used to working with combo boxes.

Re: combobox - vb.net - set default value to show in dropdown when loaded

lethalmark — Mon, 10 Feb 2014 05:43:52 GMT

see more about... vb.net combobox databinding

marc

Re: combobox - vb.net - set default value to show in dropdown when loaded

RichardMoussopo — Fri, 10 Dec 2021 22:11:31 GMT

Does anyone ever find a solution to this post? it's been an hour I am trying to figure out how to set the default selected value to the first item in the comboBox. Also, on the Update event, check if we have layers in toc to disable or enable the comboBox.


  Public Sub New()
        Dim mymap As IMap = mxDoc.FocusMap

        Try

            If mymap.LayerCount > 0 Then

                Me.Enabled = True

                For i As Integer = 0 To mymap.LayerCount - 1
                    Me.Add(mymap.Layer(i).Name)
                Next

                'Set the default selected value in the comboBox

                Me.Select(0) 'This line here won't work. I wish we could have the selectedIndex instance as on a normal window's form

            Else
                Me.Enabled = False

            End If

        Catch ex As Exception
            MessageBox.Show(ex.Message)
        End Try

    End Sub

Re: combobox - vb.net - set default value to show in dropdown when loaded

Anonymous User — Fri, 10 Dec 2021 22:11:34 GMT

I had a hard time with the add-in combox box also.

Programmatically selecting the item was easy enough but it wouldn't show the value of that item in the textbox unless I explicitly set the value property.

Here's some c# code from 10.0 that creates a combo box containing the three z capture types for the editor. The actual z capture type is then set when the mxd is opened. This behavior may have changed in later versions but I haven't tried it recently.


    public ZCaptureModeCombo()
    {
      _cz = this.Add("CurrentZ");
      _iz = this.Add("InterpolateZ");
      _sz = this.Add("SurfaceZ");


      _editor = ArcMap.Editor;
      _editorZ = _editor as IEditorZ;


      _docEvents = ArcMap.Document as IDocumentEvents_Event;
      _docEvents.OpenDocument += new IDocumentEvents_OpenDocumentEventHandler(_docEvents_OpenDocument);
      _docEvents.NewDocument += new IDocumentEvents_NewDocumentEventHandler(_docEvents_NewDocument);


    }


    void switchCaptureType(esriZCaptureType ezt)
    {
      switch (ezt)
      {
        case esriZCaptureType.esriCaptureCurrentZ:
          this.Value = "CurrentZ";
          this.Select(_cz);
          break;
        case esriZCaptureType.esriCaptureInterpolateZ:
          this.Value = "InterpolateZ";
          this.Select(_iz);
          break;
        case esriZCaptureType.esriCaptureSurfaceZ:
          this.Value = "SurfaceZ";
          this.Select(_sz);
          break;
        default:
          this.Value = "CurrentZ";
          this.Select(_cz);
          break;
      }
    }


    void _docEvents_NewDocument()
    {
      switchCaptureType(_editorZ.ZCaptureType);
    }

Re: combobox - vb.net - set default value to show in dropdown when loaded

Anonymous User — Fri, 10 Dec 2021 22:11:37 GMT

Hey Sol,

I took a closer look at this and have a cookie'less solution for you.

The int's were working fine for me but I can see how it gets unwieldy with large or dynamic numbers.


Imports ESRI.ArcGIS.Desktop.AddIns
Imports ESRI.ArcGIS.Framework


Public Class Cbt
  Inherits ESRI.ArcGIS.Desktop.AddIns.ComboBox


  Public Sub New()
    'Populate the combo box with the years e.g. 1999-2014
    For i As Integer = 2014 To 1999 Step -1
      Me.Add(i.ToString())
    Next


    'Set the default value for the combo
    Dim globalDefault As String = "2000"
    SelectYear(globalDefault)


    'Get the def query year value from the layer. Assume a value.
    Dim defQueryYear As String = "2003"


    'If defquery year is in the combo box list then use that otherwise the default has been set above
    SelectYear(defQueryYear)


  End Sub


  Protected Overrides Sub OnSelChange(cookie As Integer)
    'The user has selected a year
    Dim newYear = Me.GetItem(cookie).Caption
  End Sub
  Public Sub SelectYear(year As String)
    'Select the item in the combo from the string
    For Each item As ComboBox.Item In Me.items
      If item.Caption = year Then
        Me.Select(item.Cookie)
        Exit For
      End If
    Next
  End Sub

In this example I populate the combo box with the range. You'll get the max value from your sql table.

I then set the combo box to a default value of 2000, an example of your global default.

You would then select a value based on your def query if applicable.

If the user selects a year, you can pick it up from the newYear variable in OnSelChange.

Hope this helps

Sean.