Questions on UI for WinForms Forum

8 answers

1.3K+ views

Hello,

i am using the version 2009.1.9.414. and have great problems with the RadMultiColumnComboBox.
I have a ComboBox bound to a DataTable and now i want to select a Row in the ComboBox. In all other
ComboBoxes i know i would just set the SelectedValue of the ComboBox. My expectation is that the
correct row is selected and the Text of the ComboBox show the value of the DisplayMember of the Selected Row.

When i set the SelectedValue in the Telerik RadMultiColumnComboBox i get the follwoing result.
The Cell which will be found by the current Selected Row and the valuemember will be changed by the passed SelectValue.

This seems to be a bug and not a feature or a user error. Is there any workaround or is it possible to get a patch.
It is urgent because i am using telerik in a huge Project and am at the beginning time enough to change to Componentart or
Infragistics. I want to continue with Telerik so please help me.

Best regards
Stefan

MultiColumn ComboBox

answered on 19 Feb 2026

1 answer

49 views

VISUAL Style Builder Seeting

i open "ControlDefault.tssp" using VSB

may i do something wrong

i can not seen others seeeting

how to reset to normal

Themes and Visual Style Builder

answered on 17 Feb 2026

1 answer

97 views

RadGridView Refresh

I have what seems like a simple task.

My grid looks like this:

and I create it by pulling the data and passing it to the SetupGrid() method (partially) shown below which creates the columns and sets the DataSource. This part works fine.

        private void SetupGrid(RadGridView grid,
                                List<Dictionary>? dictionaryList,
                                List<CreditInquirySetupEF>? efList,
                                List<CreditInquirySetupTU>? tuList)
        {
            grid.Columns.Clear();
            grid.Rows.Clear();
            grid.Templates.Clear();

            grid.MasterTemplate.AutoGenerateColumns = true;
            grid.MasterTemplate.ReadOnly = true;
            grid.MasterTemplate.ShowChildViewCaptions = false;
            grid.MasterTemplate.ShowRowHeaderColumn = false;

            grid.ShowRowHeaderColumn = false;
            grid.ShowChildViewCaptions = false;

            GridViewTemplate template1 = new GridViewTemplate();
            GridViewTemplate templateApp = new GridViewTemplate();

            if (efList is not null)
            {
                template1.AutoGenerateColumns = false;
                template1.DataSource = null;
                template1.DataSource = efList;
                template1.AllowAddNewRow = false;
                template1.ReadOnly = true;
                template1.ShowRowHeaderColumn = false;
                template1.Caption = string.Empty;

                grid.MasterTemplate.Templates.Add(template1);

                template1.MasterTemplate.ShowChildViewCaptions = false;

                GridViewRelation relation1 = new GridViewRelation(grid.MasterTemplate);
                relation1.ChildTemplate = template1;
                relation1.RelationName = "EQVendorID";
                relation1.ParentColumnNames.Add("DictionaryKey");
                relation1.ChildColumnNames.Add("VendorID");
                grid.Relations.Add(relation1);
            }

            if (tuList is not null)
            {
                templateApp.AutoGenerateColumns = false;
                templateApp.DataSource = null;
                templateApp.DataSource = tuList;
                templateApp.AllowAddNewRow = false;
                templateApp.ReadOnly = true;
                templateApp.ShowRowHeaderColumn = false;
                templateApp.ShowChildViewCaptions = false;
                grid.MasterTemplate.Templates.Add(templateApp);

                GridViewRelation relationApp = new GridViewRelation(grid.MasterTemplate);
                relationApp.ChildTemplate = templateApp;
                relationApp.RelationName = "TUVendorID";
                relationApp.ParentColumnNames.Add("DictionaryKey");
                relationApp.ChildColumnNames.Add("VendorID");
                grid.Relations.Add(relationApp);
            }

            grid.DataSource = null;
            grid.DataSource = dictionaryList;

            grid.MasterTemplate.Columns["BranchID"].IsVisible = false;
            grid.MasterTemplate.Columns["DictionaryID"].IsVisible = false;
            grid.MasterTemplate.Columns["DictionaryKey"].IsVisible = false;
            grid.MasterTemplate.Columns["DictionaryKeyString"].IsVisible = false;
            grid.MasterTemplate.Columns["DictionaryTypeID"].IsVisible = false;
            grid.MasterTemplate.Columns["Active"].IsVisible = false;

            grid.MasterTemplate.Columns["Description"].Width = 300;
            grid.MasterTemplate.Columns["Description"].HeaderText = "Bureau Name";
            grid.MasterTemplate.Columns["Description"].HeaderTextAlignment = ContentAlignment.MiddleLeft;

            var buttonCol = new GridViewImageColumn();

            buttonCol = new GridViewImageColumn();
            buttonCol.HeaderText = "";
            buttonCol.Name = "Propertys";
            buttonCol.HeaderImage = VisionUI.Properties.Resources.Plus_13;
            buttonCol.Width = 30;
            buttonCol.AllowSort = false;

            grid.MasterTemplate.Columns.Add(buttonCol);


            if (efList is not null)
            {
                grid.MasterTemplate.Templates[0].Caption = "";

                var column = new GridViewTextBoxColumn();

                column.FieldName = "VendorID";
                column.Name = "VendorID";
                column.IsVisible = false;
                grid.MasterTemplate.Templates[0].Columns.Add(column);


                column = new GridViewTextBoxColumn();

                column.FieldName = "SettingsBranchID";
                column.Name = "SettingsBranchID";
                column.IsVisible = false;
                grid.MasterTemplate.Templates[0].Columns.Add(column);


                column = new GridViewTextBoxColumn();

                column.FieldName = "ServiceName";
                column.Name = "ServiceName";
                column.Width = 145;
                column.HeaderText = "Service Name";
                column.HeaderTextAlignment = ContentAlignment.MiddleLeft;
                column.TextAlignment = ContentAlignment.MiddleLeft;
                column.IsVisible = true;
                grid.MasterTemplate.Templates[0].Columns.Add(column);

The problem comes when I delete a row in the subgrid and physically removing it from the db table. I tried removing the deleted entry from the collection and refreshing and even pulling the data from the database again like this:

               int settingsBranchID = absUIControls.GetGridValueInt(gvServiceNames, "SettingsBranchID");

               await creditInquirySetupEF.DeleteServiceNameAsync(settingsBranchID);
               await creditInquirySetupTU.DeleteServiceNameAsync(settingsBranchID);

               vendorList = CommonServices.GetDictionary(EDictionaryType.CreditInquiryVendor, creditInquirySetupEF.BranchID, false);

               creditInquirySetupEFList = await creditInquirySetupEF.GetCreditInquirySetupEFAsync(creditInquirySetupEF.BranchID);
               creditInquirySetupTUList = await creditInquirySetupTU.GetCreditInquirySetupTUAsync(creditInquirySetupTU.BranchID);

               gvServiceNames.DataSource = null;
               gvServiceNames.Templates[0].DataSource = null;
               gvServiceNames.Templates[1].DataSource = null;

               gvServiceNames.DataSource = vendorList;
               gvServiceNames.Templates[0].DataSource = creditInquirySetupEFList;
               gvServiceNames.Templates[1].DataSource = creditInquirySetupTUList;

               gvServiceNames.Refresh();
               gvServiceNames.Templates[0].Refresh();
               gvServiceNames.Templates[1].Refresh();


               foreach (var item in gvServiceNames.Rows)
               {
                   item.IsExpanded = true;
               }

               gvServiceNames.Templates[0].Rows[0].IsSelected = true;

When I reassign the datasources, for some reason the top grid formats like this:

Any ideas as to why?

Thanks

Carl

GridView

answered on 11 Feb 2026

1 answer

54 views

[Solved] Rad Pivot Grid for Windows Forms. Question about the sizing of the Columns

Hi Everyone.

I have tried to setup the Rad Pivot Grid Control. It works fine.. but one thing I can't get working is the sizing of the columns. How do I get the columns to fit the text inside it. As you can see in the picture attached the 'Binder Fee' is width is crazy wide for the value inside (example 123457.00).

I want to the bottom image's layout at the end of the day. The top one is too wide.

Thanks!

PivotGrid and PivotFieldList

answered on 05 Feb 2026

1 answer

84 views

Version Upgrade Issue

private void radGridView1_ContextMenuOpening(object sender, ContextMenuOpeningEventArgs e)
{
    var cellElement = e.ContextMenuProvider as GridCellElement;
    if (cellElement == null) return;
    if (cellElement is GridHeaderCellElement)
    {
      RadMenuItem exportExcel = new RadMenuItem($"ExportToExcel");
      exportExcel.Click += (s, args) => { ExportToExcel(); };
      e.ContextMenu.Items.Add(exportExcel);
    }
}
After upgrade to UI.for.WinForms.AllControls.Net80 <Version>2025.4.1321
cellElement is null in the above line 
then return 
i can not see "RadMenuItem($"ExportToExcel")"
WHY？

GridView

updated answer on 04 Feb 2026

1 answer

81 views

GridView Rows Selection

Hello.

I'm currently using VS2019, Telerik version 2021.3.914.40.

When I Shift-click and then MouseDown on a row in radGridView,

the last clicked RowIndex is internally saved.

When I Shift + MouseDown, the last clicked RowIndex is set as the StartIndex, and the last clicked RowIndex is set as the EndIndex.

I'd like to reset this internal RowIndex, which is saved by the last click.

Since GridView.ClearSelection() doesn't handle this code, I've attached the relevant project. Please check.

GridView

answered on 03 Feb 2026

1 answer

59 views

Eliminate tab headers on subgrid

I'm trying to eliminate the tab that says table on the subgrids below. I've tried

template1.ShowChildViewCaptions = false;

template1.MasterTemplate.ShowChildViewCaptions = false;

grid.ShowChildViewCaptions = false;

grid.MasterTemplate.ShowChildViewCaptions = false;

Nothing works. What am I doing wrong?

Thanks

Carl

GridView

answered on 30 Jan 2026

1 answer

64 views

Using Be in client-server mode

Hello,
Currently using L4G (Version 11.7) in client mode (WebClient V11 on the PC)-server with a Pasoe configuration on the Linux server (where OpenEdge (DLC), PasOE, databases, and the _DB-REQUIRED program tree are located).
I need to migrate to version 12.2 + Telerik screen.
Do you have an example of a simple grid screen with CRUD management on a Be in client-server mode?
- Read the table: READ
- Create a record: CREATE
- Modify the table: UPDATE
- Delete a record: DELETE
Thank you

GridView

answered on 28 Jan 2026

1 answer

93 views

[Solved] offline documentation package

Is there an offline documentation package available for a specific version of Telerik UI for WinForms? I need a downloadable docs bundle so I can translate it into a specified language. The website only provides the latest documentation and examples, which is very inconvenient to use.

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