GridViewMultiComboBoxColumn

[Victoria F]

Please , help me to set a size of the columns in GridViewMultiComboBoxColumn of the GridView. 
I'm trying to increase a width of the columns in dropdown combobox (see picture attached).
Thank you ,
Victoria.

[Richard Slade]

Hi Victoria, 

You can set the BestFit on this or get to the columns directly. Have a look at this link

Let me know if you need other help
Richard

[Victoria F]

Thank you for the answer, but this is not what I need. I need not the columns of the GredView. I need to reach columns that are in the combobox which is a  cell of the gridview. See the picture I attached before : dropdown(combobox) is one of the cells of the gridview, inside this dropdown(combobox) there are 2 columns, width of those 2 columns I can not set.

Thank you ,
Victoria.

[Richard Slade]

Hi Victoria, 

The link was not referring to the GridView. It is referring to the GridViewMultiColumnBoxColumn as you asked. If I have misunderstood, my apologies. 
Richard

[Victoria F]

GridViewMultiComboBoxColumn col = new GridViewMultiComboBoxColumn();
col.DataSource = dtLobList;
col.DisplayMember = "LobText";
col.ValueMember = "LobText";
col.FieldName = "LobText";
col.Name = "LOB";
col.HeaderText = "LOB";

col.Width = 200;

dgv_format.Columns.Add(col);

This line : col.Width = 200;
sets the size of the GridView column that is combobox..

[Richard Slade]

Hi, 

This is partly lifted from the link.. 

Hope this helps

Private isColumnAdded As Boolean

Private Sub radGridView1_CellBeginEdit(ByVal sender As Object, ByVal e As GridViewCellCancelEventArgs)

    If TypeOf Me.GridView.CurrentColumn Is GridViewMultiComboBoxColumn Then

        If (Not isColumnAdded) Then

            isColumnAdded = True

            Dim editor As RadMultiColumnComboBoxElement = CType(Me.GridView.ActiveEditor, RadMultiColumnComboBoxElement)

            editor.EditorControl.MasterGridViewTemplate.AutoGenerateColumns = False

            editor.EditorControl.Columns.Add(New GridViewTextBoxColumn("OrderID"))

            editor.EditorControl.Columns.Add(New GridViewTextBoxColumn("Quantity"))

            editor.AutoSizeDropDownToBestFit = True

            editor.EditorControl.Columns(0).Width = 50

        End If

    End If

End Sub

[Richard Slade]

Victoria, 

This is the part you will be especially interested in.. 

Dim editor As RadMultiColumnComboBoxElement = CType(Me.GridView.ActiveEditor, RadMultiColumnComboBoxElement)
editor.AutoSizeDropDownToBestFit = True
editor.EditorControl.Columns(0).Width = 50

Let me know if that helps
Richard

[Victoria F]

Thank you , Richard
Yes, that's what I needed ,

private void radGridView_LayerList_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
{
   if (this.radGridView_LayerList.ActiveEditor is RadMultiColumnComboBoxElement)
    {
      ((RadGridView)((RadMultiColumnComboBoxElement)this.radGridView_LayerList.ActiveEditor).EditorControl).AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
     }
}

Now , it works.
When I tried to assign width by columns, it does not see the columns. I assume because of datasource assigned as a DataTable:
GridViewMultiComboBoxColumn col = new GridViewMultiComboBoxColumn();
 col.DataSource = dtLobList;
dgv_format.Columns.Add(col);
Anyway, AutoSizeColumnsMode works forRadMultiColumnComboBoxElement.
Thank you,
Victoria.

[Richard Slade]

Very glad you have it working Victoria.
Please remember to mark as answer so others can quickly find the solution too.

All the best
Richard

[Richard Slade]

Hi again,

you can still get to the columns, it's just that it is auto generating them for you.

private void radGridView_LayerList_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
{
   if (this.radGridView_LayerList.ActiveEditor is RadMultiColumnComboBoxElement)
    {
      ((RadGridView)((RadMultiColumnComboBoxElement)this.radGridView_LayerList.ActiveEditor).EditorControl).Columns(0).Width = 50;     }
}

(will be something very close to this.. I don't have access to a development environment right now)
Hope that helps
Richard

[Diego Guayan]

I am having problem getting the columns as in given sample above.

My code as follows...

GridViewMultiComboBoxColumn cb = new GridViewMultiComboBoxColumn();
cb.HeaderText = " Link Document To Condition  ";
cb.Width = 350;
cb.DisplayMember = "Link";
cb.ValueMember = "id";
cb.DataSource = dtCondtions;

radGridView1.CellBeginEdit += new GridViewCellCancelEventHandler(radGridView1_CellBeginEdit);
           
           
  private void radGridView1_CellBeginEdit(object sender, GridViewCellCancelEventArgs e)
  {
      if (this.radGridView1.ActiveEditor is RadMultiColumnComboBoxElement)
      {
           ((RadGridView)((RadMultiColumnComboBoxElement)this.radGridView1.ActiveEditor).EditorControl).Columns[0].Width = 125;
      }
  }

I always gets the error, column count = 0,

Am I missing something here?

[Stefan]

Hi Diego Guayan,

Thank you for writing.

Can you please try to use CellEditorInitialized instead of CellBeginEdit event. This should help you. 

Let me know if you need anything else.

All the best,
Stefan
the Telerik team