Unplanned
Last Updated: 01 Aug 2024 07:30 by ADMIN

To reproduce:

1. Run the form with RadMultiColumnCombobox on high dpi.

2. Set SelectedIndex to -1 (no value selected initially)

3. As a result, the first value get displayed in the text area.

Unplanned
Last Updated: 18 Dec 2023 12:10 by ADMIN

In this particular case, the RadMultiColumnComboBoxElement is used as a custom editor inside RadPropertyGrid control. When the editor is shown it needs to be opened 3 times to correctly calculate its width. In addition, the font is scaled twice:

Unplanned
Last Updated: 20 Mar 2023 11:40 by ADMIN

Use the following code and try to scroll item by item with the mouse wheel:

        public RadForm1()
        {
            InitializeComponent();

            DataTable dt = new DataTable();
            dt.Columns.Add("Id", typeof(int));
            dt.Columns.Add("Name", typeof(string));
            for (int i = 0; i < 20; i++)
            {
                dt.Rows.Add(i, "Item"+i);
            }
            this.radMultiColumnComboBox1.DisplayMember = "Name";
            this.radMultiColumnComboBox1.ValueMember = "Id";
            this.radMultiColumnComboBox1.DataSource = dt;
            this.radMultiColumnComboBox1.ScrollOnMouseWheel = true;
            this.radMultiColumnComboBox1.SelectedValueChanged+=radMultiColumnComboBox1_SelectedValueChanged;
        }

        private void radMultiColumnComboBox1_SelectedValueChanged(object sender, EventArgs e)
        {
            Console.WriteLine("Value: "+this.radMultiColumnComboBox1.SelectedValue);
        }

Expected behavior: one item is scrolled at a time

Actual behavior: two items are scrolled at a time

Note: RadDropDownList behaves as expected.

 

Completed
Last Updated: 23 Sep 2022 13:07 by ADMIN
Release R3 2022

- Add a RadMultiColumnComboBox and populate it with data.

- Hide most of the columns.

- Enable the AutoSizeDropDownToBestFit property

Note: the issue is reproducible with ControlDefault, Office2019Light, Desert. But it is NOT reproducible with Fluent

        private void RadForm1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'nwindDataSet.Orders' table. You can move, or remove it, as needed.
            this.ordersTableAdapter.Fill(this.nwindDataSet.Orders);

            this.radMultiColumnComboBox1.DisplayMember = "OrderID";
            this.radMultiColumnComboBox1.ValueMember = "OrderID";
            this.radMultiColumnComboBox1.DataSource = ((DataSet)ordersBindingSource.DataSource).Tables[0].AsEnumerable().Reverse().Take(5);
             

            this.radMultiColumnComboBox1.UseCompatibleTextRendering = false;
            foreach (GridViewColumn col in this.radMultiColumnComboBox1.EditorControl.Columns)
            {
                if (!col.Name.Contains("ID") && !col.Name.Contains("OrderDate"))
                {
                    col.IsVisible = false;
                }
            }
            this.radMultiColumnComboBox1.AutoSizeDropDownColumnMode = BestFitColumnMode.AllCells;
            this.radMultiColumnComboBox1.AutoSizeDropDownToBestFit = true;

            return;  
        }

Expected result:

Actual result:

Workaround: instead of hiding the redundant columns, you can remove them:

            List<string> columnNames = new List<string>();
            foreach (GridViewColumn col in this.radMultiColumnComboBox1.EditorControl.Columns)
            {
                if (!col.Name.Contains("ID") && !col.Name.Contains("OrderDate"))
                {
                    columnNames.Add(col.Name);
                    //col.IsVisible = false;
                }
            }
            while (columnNames.Count>0)
            {
                this.radMultiColumnComboBox1.Columns.Remove(columnNames[0]);
                columnNames.RemoveAt(0);
            }

Completed
Last Updated: 19 May 2022 14:24 by ADMIN
Release R2 2022 SP1

This scenario is reproducible when the MCCB dropdown has 1 item. To disable the selection of the row we can set the EditorControl.CurrentRow to null. However, when the dropdown is open the Text property is set to the first row.

Completed
Last Updated: 22 Mar 2022 13:50 by ADMIN
Release R2 2022 (LIB 2022.1.322)

This issue is reproducible only in .NET 6. It works OK in .NET 4.8.

Use the following code snippet:

        public RadForm1()
        {
            InitializeComponent();

            List<Student> collectionOfStudents = new List<Student>();
            collectionOfStudents.Add(new Student(0, "Peter", "A+"));
            collectionOfStudents.Add(new Student(1, "John", "D-"));
            collectionOfStudents.Add(new Student(2, "Antony", "B+"));
            collectionOfStudents.Add(new Student(3, "David", "A-"));
            collectionOfStudents.Add(new Student(4, "John", "D-"));

            this.radMultiColumnComboBox1.DisplayMember = "Name";
            this.radMultiColumnComboBox1.ValueMember = "Id";
            this.radMultiColumnComboBox1.DataSource = collectionOfStudents;

            this.radMultiColumnComboBox1.AutoCompleteMode = AutoCompleteMode.Append;
        }

        public class Student
        {
            int m_id;
            string m_name;
            string m_grade;
            public Student(int m_id, string m_name, string m_grade)
            {
                this.m_id = m_id;
                this.m_name = m_name;
                this.m_grade = m_grade;
            }
            public int Id
            {
                get
                {
                    return m_id;
                }
                set
                {
                    m_id = value;
                }
            }
            public string Name
            {
                get
                {
                    return m_name;
                }
                set
                {
                    m_name = value;
                }
            }
            public string Grade
            {
                get
                {
                    return m_grade;
                }
                set
                {
                    m_grade = value;
                }
            }
        }

Type "David" in the editor and hit Backspace:

Expected: every Backspace hitting should delete the last character:

Actual: it is not possible to delete the text:

Workaround:

this.radMultiColumnComboBox1.AutoCompleteMode = AutoCompleteMode.Suggest;

Unplanned
Last Updated: 21 Mar 2022 17:15 by JeffSM
When opening the dropdown for the first time, the grid inside RadMultiColumnComboBox is not stretched to take up the full height of the combo box.
Unplanned
Last Updated: 21 Mar 2022 10:03 by ADMIN
Declined
Last Updated: 19 Aug 2021 09:01 by ADMIN
Created by: Dave
Comments: 4
Category: MultiColumnCombo
Type: Feature Request
1

Any chance for an updated MCCB with EL like the new Textboxes?

Thanks,

_D

Completed
Last Updated: 02 Aug 2021 08:33 by ADMIN
Release R3 2021 (LIB 2021_2_802)
Please refer to the attached sample project and follow the steps form the gif file.
Completed
Last Updated: 04 Jun 2021 09:39 by ADMIN
Release R2 2021 SP1 (LIB 2021.2.607)

To reproduce use the following code snippet and press the Enter key on group header row:

public RadForm1()
{
    InitializeComponent();

    GroupDescriptor descriptor = new GroupDescriptor();
    descriptor.GroupNames.Add("CategoryName", ListSortDirection.Ascending);
    this.radMultiColumnComboBox1.EditorControl.GroupDescriptors.Add(descriptor);
    this.radMultiColumnComboBox1.EditorControl.EnableGrouping = true;
    this.radMultiColumnComboBox1.EditorControl.ShowGroupedColumns = true;
}

Completed
Last Updated: 28 Apr 2021 12:41 by ADMIN
Release R2 2018
To reproduce: 
- When the filter is set to contains the item is different than the item is selected from the drop-down and the text is taken from the append functionality.

Workaround
Either change the filter to StarrtsWith or remove the suggest functionality. 
Unplanned
Last Updated: 07 Apr 2021 13:59 by ADMIN

Using AutoCompleteMode.SuggestAppend caused other issues and I changed it to Suggest.

In the example program I provided if I type in "meadows "  meadows and a space I should get the following Suggested List.

SUGGESTED LIST

Meadows Green

However I get " Meadows" selected with a space at the front of the word.

Sample program that illustrates the issue can be downloaded from here: https://www.dropbox.com/s/8qxhmxai0y4w7qg/FilterMultiColumn.zip?dl=0 

Completed
Last Updated: 06 Apr 2021 08:35 by ADMIN
Release R2 2021

Please refer to the attached sample project and follow the steps from the gif file.

1) User does a search operation

2) BackgroundWorker does its task and finishes at some point, then set defaults to select the first result.

3) User selects a different result row.

4) Selected record still indicates and points to the first result.

Workaround:

Me.RadMultiColumnComboBox1.EditorControl.MasterView.TableSearchRow.AutomaticallySelectFirstResult = False

Completed
Last Updated: 04 Dec 2020 08:13 by ADMIN
Release R3 2018 SP1
To reproduce: Add a RadMultiColumnCombobox to the form, set the DropDownStyle property to DropDownList and clear the text. You will notice that the height of the control is not bigger than 5 px.

Workaround: set MinimumSize 

Me.RadMultiColumnComboBox1.MinimumSize = New Size(200, 23)

Completed
Last Updated: 19 Oct 2020 13:35 by ADMIN
Release R3 2020 SP1

When you copy "Chang" and try to paste it in the editable area, it is not pasted even if the Clipboard data is a valid entry: 

        Me.RadMultiColumnComboBox1.DisplayMember = "ProductName"
        Me.RadMultiColumnComboBox1.ValueMember = "ProductID"
        Me.RadMultiColumnComboBox1.DataSource = ProductsBindingSource

        Me.RadMultiColumnComboBox1.AutoCompleteMode = AutoCompleteMode.Append
        Me.RadMultiColumnComboBox1.MultiColumnComboBoxElement.LimitToList = True

However, the context menu in the text box is available and you can paste even invalid value.

Completed
Last Updated: 31 Aug 2020 14:39 by ADMIN
Release R3 2020
To reproduce:

Add a RadMultiColumnComboBox with two rows. Open the dropdown, you will see no scrollbars, open it again and scrollbars will be visible.

Workaround:

Use the following custom class:

public class MCCB : RadMultiColumnComboBox
{
    protected override RadMultiColumnComboBoxElement CreateMultiColumnComboBoxElement()
    {
        return new MCCBElement();
    }
}

public class MCCBElement : RadMultiColumnComboBoxElement
{
    protected override Size GetPopupSize(RadPopupControlBase popup, bool measure)
    {
        Size baseSize = base.GetPopupSize(popup, measure);

        RadScrollBarElement hScrollBarElement = this.EditorControl.TableElement.HScrollBar;
        baseSize.Height += (int)hScrollBarElement.ControlBoundingRectangle.Size.Height;

        return baseSize;
    }

    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(RadMultiColumnComboBoxElement);
        }
    }
}
Completed
Last Updated: 31 Aug 2020 12:34 by ADMIN
Release R3 2020

AutoSizeDropDownToBestFit is not working when i have 3 rows in the drop down list. Scroll bars appear with i have 3 rows, and when i only 2 rows it autosize the width of the dropdown.

 

[Code ]

        Dim TransData As DataTable = New DataTable
        TransData.Columns.Add("Index")
        TransData.Columns.Add("Type")
        TransData.Rows.Add("0", "-- Select --")
        TransData.Rows.Add("SEA", "Ship by Sea")
        TransData.Rows.Add("AIR", "Ship by Air")
        TransData.Rows.Add("VOR", "VOR by Air")

        TransportRadMultiColumnComboBox.DataSource = TransData
        TransportRadMultiColumnComboBox.DisplayMember = "Type"
        TransportRadMultiColumnComboBox.ValueMember = "Index"
        TransportRadMultiColumnComboBox.Columns(0).IsVisible = False
        TransportRadMultiColumnComboBox.Columns(1).HeaderText = "Transport"
        TransportRadMultiColumnComboBox.AutoSizeDropDownToBestFit = True

 

[Works when i have only 2 rows in my DataTable]

 

When i add 3 rows to my dataTable the AutoSizeDropDownToBestFit does not work.. WHYYYYYYYY??????

 

Completed
Last Updated: 17 Aug 2020 14:30 by ADMIN
This issue is inside the same application as in ticket #667438. There is a MultiColumnComboBox inside the editor form. There are two data sources. One containing the customer's "Rep" field and one for the list of dropdown items (list of Reps).

How can the dropdown list be bound to the list of Reps but still display and update the Customer's Rep field? The attached video demonstrates the current behavior of the control.
Completed
Last Updated: 23 Jul 2020 11:54 by ADMIN
Release R3 2020 (LIB 2020.2.713)

Dear support,

I have an issue with a multicolumn combobox that won't close upon selection.

The first time (when it is empty) everything goes well, but the second time (in the attached video around the 10th second) it won't close the dropdown if you select the item again.

I suspect it is acting that way because I select the same item.

It is an annoying behavior because now users need to click on the little arrow to close the drop down, which is not intuitive.

I recorded a video that illustrates this issue.

 

Many thanks again.

Kind regards.

Peter.

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