Completed
Last Updated: 28 Nov 2019 14:07 by ADMIN
Release R1 2020
Currently when grouping the summary row for each group is shown. The ShowTotals property defines if total summary rows will be shown. Need an option to define if the group summary row will be shown.
Completed
Last Updated: 07 Nov 2019 07:03 by ADMIN
ADMIN
Created by: Hristo
Comments: 2
Category: GridView
Type: Bug Report
2
How to reproduce
public partial class Form1 : RadForm
{
    public Form1()
    {
        InitializeComponent();

        GridViewTextBoxColumn textBoxColumn = new GridViewTextBoxColumn();
        textBoxColumn.Name = "Column";
        textBoxColumn.HeaderText = "Column";
        this.radGridView1.MasterTemplate.Columns.Add(textBoxColumn);

        GridViewTextBoxColumn textBoxColumn2 = new GridViewTextBoxColumn();
        textBoxColumn2.Name = "TextBoxColumn2";
        textBoxColumn2.HeaderText = "ReadOnlyColumn";
        this.radGridView1.MasterTemplate.Columns.Add(textBoxColumn2);

        for (int i = 0; i < 10; i++)
        {
            object v = i * 2;
            if (i % 3 == 0)
            {
                v = null;
            }

            this.radGridView1.Rows.Add(new object[] { i, v });
        }

        this.radGridView1.MultiSelect = true;
        foreach (var row in this.radGridView1.Rows)
        {
            foreach (var cell in row.Cells)
            {
                GridViewCellInfo cellInfo = cell as GridViewCellInfo;
                if (cellInfo != null && cellInfo.RowInfo.Index % 3 == 0 && cellInfo.ColumnInfo.Index == 1)
                {
                    cellInfo.ReadOnly = true;
                }
            }
        }
    }

}

Workaround:
public class MyRadGridView : RadGridView
{
    public override string ThemeClassName
    {
        get
        {
            return typeof(RadGridView).FullName;
        }
    }

    protected override RadGridViewElement CreateGridViewElement()
    {
        return new MyRadGridViewElement();
    }
}

internal class MyRadGridViewElement : RadGridViewElement
{
    protected override Type ThemeEffectiveType
    {
        get
        {
            return typeof(RadGridViewElement);
        }
    }

    protected override MasterGridViewTemplate CreateTemplate()
    {
        return new MyMasterGridViewTemplate();
    }
}

internal class MyMasterGridViewTemplate : MasterGridViewTemplate
{
    protected override void PasteDataToRow(List<string> rowData, GridViewRowInfo row)
    {
        {
            int colIndex = this.Owner.CurrentColumn.Index;
            int j = 0;

            while (j < rowData.Count && colIndex < this.CurrentView.ViewTemplate.ColumnCount)
            {
                GridViewColumn col = this.CurrentView.ViewTemplate.Columns[colIndex];
                if (col.IsVisible && !col.ReadOnly && !row.Cells[colIndex].ReadOnly)
                {

                    object value = rowData[j];

                    if (string.IsNullOrEmpty(rowData[j]))
                    {
                        value = null;
                    }
                    else if (this.CurrentView.ViewTemplate.Columns[colIndex].DataType == typeof(string))
                    {
                        GridViewTextBoxColumn textColumn = col as GridViewTextBoxColumn;

                        if (textColumn != null && textColumn.MaxLength > 0)
                        {
                            if (rowData[j].Length > textColumn.MaxLength)
                            {
                                value = rowData[j].Substring(0, textColumn.MaxLength);
                            }
                        }
                    }
                    else if (this.CurrentView.ViewTemplate.Columns[colIndex].DataType == typeof(DateTime))
                    {
                        try
                        {
                            value = DateTime.Parse(rowData[j], this.CurrentView.ViewTemplate.Columns[colIndex].FormatInfo);
                        }
                        catch { }
                    }
                    else if (this.CurrentView.ViewTemplate.Columns[colIndex].DataType == typeof(Color))
                    {
                        try
                        {
                            value = ColorTranslator.FromHtml(rowData[j]);
                        }
                        catch { }
                    }

                    if (this.ClipboardPasteMode == GridViewClipboardPasteMode.EnableWithNotifications)
                    {
                        CellValidatingEventArgs cellValidating = new CellValidatingEventArgs(row, col, value, row.Cells[colIndex].Value, null);
                        this.EventDispatcher.RaiseEvent<CellValidatingEventArgs>(EventDispatcher.CellValidating, this, cellValidating);

                        if (!cellValidating.Cancel)
                        {
                            row.Cells[colIndex].Value = value;

                            CellValidatedEventArgs cellValidated = new CellValidatedEventArgs(row, col, value);
                            this.EventDispatcher.RaiseEvent<CellValidatedEventArgs>(EventDispatcher.CellValidated, this, cellValidated);
                        }
                    }
                    else
                    {
                        row.Cells[colIndex].Value = value;
                    }

                    j++;
                }

                colIndex++;
            }
        }
    }
}


Completed
Last Updated: 18 Oct 2019 08:03 by ADMIN
Release R3 2019 SP1
This way the column could bind to any collection of objects which can be converted to doubles.
Completed
Last Updated: 17 Oct 2019 09:43 by ADMIN
RadGridView can not change the current column (by using the IsCurrent of the desired column) in the CurrentColumnChanged event.
Completed
Last Updated: 14 Oct 2019 10:43 by ADMIN
Release R3 2019 SP1
Add a combo-box column that point to a field with Guid data type, add summary item to this columns as well.

Workaround: 

private void RadGridView1_CreateRowInfo(object sender, GridViewCreateRowInfoEventArgs e)
{
    if (e.RowInfo is GridViewSearchRowInfo)
    {
        e.RowInfo = new MySerachRow(e.ViewInfo);
    }

}
class MySerachRow : GridViewSearchRowInfo
{
    public MySerachRow(GridViewInfo viewInfo) : base(viewInfo)
    {
    }

    public override string GetCellFormattedValue(GridViewRowInfo row, GridViewColumn column)
    {
        if (row is GridViewSummaryRowInfo)
        {
            return "";
        }
        return base.GetCellFormattedValue(row, column);
    }
}
 
Completed
Last Updated: 14 Oct 2019 10:33 by ADMIN
Release R3 2019 SP1

Dear Telerik Support Team,

 

I have a Grid with one level of Hierarchy, I am using also the search row control of Gridview but this control only searches the data in the Parent Grid and not in the child Grid, I am using the version: v.2019.2.618.20 of Telerik controls in the Project. Below is the code snippet which is used in the Project, please let us know how we can search in child grid using the search row of the Gridview.

 

            radgvStockCount.DataSource = dtStockCountHeader
            radgvStockCount.MasterTemplate.EnableHierarchyFiltering = True
            radgvStockCount.UseScrollbarsInHierarchy = True
            radgvStockCount.MasterTemplate.Columns("INVCountHeaderId").IsVisible = False
            radgvStockCount.MasterTemplate.Columns("INVCountNo").HeaderText = "Stock Count No"
            radgvStockCount.MasterTemplate.Columns("CountryCode").HeaderText = "Country Code"
            radgvStockCount.MasterTemplate.Columns("AreaCode").HeaderText = "Area Code"
            radgvStockCount.MasterTemplate.Columns("LocationCode").HeaderText = "Location Code"
            radgvStockCount.MasterTemplate.Columns("LocationName").HeaderText = "Location Name"
            radgvStockCount.MasterTemplate.Columns("CreatedBy").HeaderText = "Opened By"
            radgvStockCount.MasterTemplate.Columns("CreatedDate").HeaderText = "Opened Date"

            Dim template As New GridViewTemplate()
            template.DataSource = dtStockCountBatches
            radgvStockCount.Templates.Add(template)
            template.Columns("INVCountBatchesId").IsVisible = False
            template.Columns("INVCountHeaderId").IsVisible = False
            template.Columns("INVCountNo").HeaderText = "Stock Count No"
            template.Columns("INVCountBatchesNo").HeaderText = "Stock Count Batch No"
            template.Columns("LocationCode").HeaderText = "Location Code"
            template.Columns("LocationName").HeaderText = "Location Name"
            template.Columns("SupervisorQty").HeaderText = "Supervisor Qty"
            template.Columns("CreatedBy").HeaderText = "Batch File Uploaded By"
            template.Columns("CreatedDate").HeaderText = "Uploaded Date"
            template.AllowAddNewRow = False
            template.AllowEditRow = False
            template.AllowDeleteRow = False
            template.AllowSearchRow = False
            template.AllowRowResize = False
            template.EnableFiltering = True
            template.EnableHierarchyFiltering = True
            template.ShowHeaderCellButtons = True
            template.ShowGroupedColumns = True
            template.EnableHierarchyFiltering = True
            template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill

            Dim relation As New GridViewRelation(radgvStockCount.MasterTemplate, template)
            relation.RelationName = "StockCountBatches"
            relation.ParentColumnNames.Add("INVCountHeaderId")
            relation.ChildColumnNames.Add("INVCountHeaderId")
            radgvStockCount.Relations.Add(relation)
Completed
Last Updated: 08 Oct 2019 16:27 by ADMIN
Release R3 2019 SP1

When pressing Enter or Tab in the new row the ParsingDateTime event is fired after the editor is validated. Use attached to reproduce.

 

private void GridView_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    var editor = gridView.ActiveEditor as RadDateTimeEditor;
    var editorElement = editor.EditorElement as RadDateTimeEditorElement;
    editorElement.TextBoxElement.MaskType = MaskType.FreeFormDateTime;
    var provider = ((FreeFormDateTimeProvider)editorElement.TextBoxElement.Provider);
    editorElement.TextBoxElement.Provider = new MyFreeFormDateTimeProvider(provider.Mask, provider.Culture, provider.Owner);
}

class MyFreeFormDateTimeProvider : FreeFormDateTimeProvider
{
    public MyFreeFormDateTimeProvider(string mask, CultureInfo culture, RadMaskedEditBoxElement owner) : base(mask, culture, owner)
    {
    }
    public override bool Validate(string stringValue)
    {
        //do your code here
        return base.Validate(stringValue);
    }
}
Completed
Last Updated: 08 Oct 2019 16:26 by ADMIN
Release R3 2019 SP1
Completed
Last Updated: 08 Oct 2019 16:24 by ADMIN
Release R3 2019 SP1
The BackColor is not exported when a custom theme is used along with conditional formatting and BackColor is set to transparent in the custo theme.
Completed
Last Updated: 08 Oct 2019 16:13 by ADMIN
Release R3 2019 SP1
Created by: Dimitar
Comments: 0
Category: GridView
Type: Bug Report
0
The DateTime Value is lost when using a custom format "dd.MM.yyyy" in RadgridView and custom provider is used. 

Workaround: 
Set the MaxDate in the custom provider:
Public Class MyMaskDateTimeProvider
  Inherits MaskDateTimeProvider

  Public Sub New(mask As String, culture As CultureInfo, owner As RadMaskedEditBoxElement)
        MyBase.New(mask, culture, owner)
        Me.MaxDate = DateTime.MaxValue
    End Sub

   
End Class
Completed
Last Updated: 08 Oct 2019 11:19 by ADMIN
Release R3 2019 SP1
Created by: Syed Hussain
Comments: 5
Category: GridView
Type: Bug Report
0

We have upgraded from WinControl UI 2010 to 2019 R2. 

we have a lot of non-data bound radgridview that we process our data and add each row manually.

The radgridView.Rows.Add(rowdatacolumn1, rowdatacolumn2, rowdatacolumn3) used to return the row index of the added row. It is now returning -1 . 

This is breaking a lot of our code. 

Completed
Last Updated: 22 Aug 2019 13:22 by ADMIN
To reproduce: run the attached project and toggle the checkbox in the header cell of the child template. 

Workaround: use a custom GridCheckBoxHeaderCellElement


    public partial class RadForm1 : Telerik.WinControls.UI.RadForm
    {
        public RadForm1()
        {
            InitializeComponent();

            this.radGridView1.CreateCell += radGridView1_CreateCell;

            DataTable dt = new DataTable();
            dt.Columns.Add("CategoryId", typeof(int));
            dt.Columns.Add("CategoryName", typeof(string));
            dt.Columns.Add("ParentCategoryId", typeof(int));

            dt.Rows.Add(1, "Category1", 0);
            dt.Rows.Add(2, "Category2", 0);
            dt.Rows.Add(3, "Category3", 0);

            Random rand = new Random();
            for (int i = 4; i < 20; i++)
            {
                dt.Rows.Add(i, "Category" + i, rand.Next(1, 4));
            }
            this.radGridView1.Relations.AddSelfReference(this.radGridView1.MasterTemplate, "CategoryId", "ParentCategoryId");
            this.radGridView1.DataSource = dt;
            this.radGridView1.AutoSizeColumnsMode = Telerik.WinControls.UI.GridViewAutoSizeColumnsMode.Fill;

            GridViewTemplate childTemplate = CreateChildTemplate();
            GridViewRelation relation = new GridViewRelation(
                this.radGridView1.MasterTemplate,
                childTemplate);
            relation.ChildColumnNames.Add("CategoryId");
            relation.ParentColumnNames.Add("CategoryId");
            this.radGridView1.Relations.Add(relation);
        }

        private void radGridView1_CreateCell(object sender, GridViewCreateCellEventArgs e)
        {
            if (e.CellType == typeof(GridCheckBoxHeaderCellElement))
            {
                e.CellElement = new CustomGridCheckBoxHeaderCellElement(e.Column, e.Row);
            }
        }

        private GridViewTemplate CreateChildTemplate()
        {
            GridViewTemplate childTemplate = new GridViewTemplate();
            childTemplate.AutoGenerateColumns = false;
            this.radGridView1.Templates.Add(childTemplate);

            GridViewDecimalColumn decColumn = new GridViewDecimalColumn
            {
                Name = "CategoryId",
                HeaderText = "CategoryId Id",
                FieldName = "CategoryId",
                IsVisible = false,
                MinWidth = 100
            };
            childTemplate.Columns.Add(decColumn);

            GridViewTextBoxColumn tbxColumn = new GridViewTextBoxColumn
            {
                Name = "RightName",
                HeaderText = "Right Name",
                FieldName = "RGT_NAME",
                ReadOnly = true,
                MinWidth = 100
            };
            childTemplate.Columns.Add(tbxColumn);

            GridViewCheckBoxColumn chkxColumn = new GridViewCheckBoxColumn
            {
                Name = "Checkbox",
                EnableHeaderCheckBox = true,
                FieldName = "HasAccess",
            };
            childTemplate.Columns.Add(chkxColumn);
            childTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
            return childTemplate;
        }

        public class CustomGridCheckBoxHeaderCellElement : GridCheckBoxHeaderCellElement
        {
            public CustomGridCheckBoxHeaderCellElement(GridViewColumn column, GridRowElement row) : base(column, row)
            {
            }

            public bool SuspendProcessingToggleStateChanged
            {
                get
                {
                    FieldInfo fi = typeof(GridCheckBoxHeaderCellElement).GetField("suspendProcessingToggleStateChanged", BindingFlags.NonPublic | BindingFlags.Instance);
                    return (bool)fi.GetValue(this);
                }
                set
                {
                    FieldInfo fi = typeof(GridCheckBoxHeaderCellElement).GetField("suspendProcessingToggleStateChanged", BindingFlags.NonPublic | BindingFlags.Instance);
                    fi.SetValue(this, value);
                }
            }

            public bool ShouldCheckDataRows
            {
                get
                {
                    FieldInfo fi = typeof(GridCheckBoxHeaderCellElement).GetField("shouldCheckDataRows", BindingFlags.NonPublic | BindingFlags.Instance);
                    return (bool)fi.GetValue(this);
                }
                set
                {
                    FieldInfo fi = typeof(GridCheckBoxHeaderCellElement).GetField("shouldCheckDataRows", BindingFlags.NonPublic | BindingFlags.Instance);
                    fi.SetValue(this, value);
                }
            }

            protected override void checkbox_ToggleStateChanged(object sender, StateChangedEventArgs args)
            {
                if (SuspendProcessingToggleStateChanged)
                {
                    return;
                }

                if (this.ViewTemplate != null && !this.ViewTemplate.IsSelfReference && !this.MasterTemplate.IsSelfReference)
                {
                    this.MasterTemplate.BeginUpdate();
                }
                else
                {
                    this.TableElement.BeginUpdate();
                }

                object valueState = DBNull.Value;

                if (args.ToggleState == ToggleState.On)
                {
                    valueState = true;
                }
                else if (args.ToggleState == ToggleState.Off)
                {
                    valueState = false;
                }
                else if (args.ToggleState == ToggleState.Indeterminate)
                {
                    valueState = null;
                }

                RaiseToggleStateEvent();

                if (!ShouldCheckDataRows)
                {
                    if (this.ViewTemplate != null && !this.ViewTemplate.IsSelfReference && !this.MasterTemplate.IsSelfReference)
                    {
                        this.MasterTemplate.EndUpdate(true, new DataViewChangedEventArgs(ViewChangedAction.DataChanged));
                    }

                    return;
                }

                this.GridViewElement.EditorManager.EndEdit();

                this.TableElement.BeginUpdate();
                this.MasterTemplate.MasterViewInfo.TableSearchRow.SuspendSearch();
                List<GridViewRowInfo> list = GetRowsToIterateOver();
                foreach (GridViewRowInfo rowInfo in list)
                {
                    GridViewGroupRowInfo groupRow = rowInfo as GridViewGroupRowInfo;

                    if (groupRow != null)
                    {
                        this.CheckAllCheckBoxInChildRows(groupRow, valueState);
                    }
                    else
                    {
                        rowInfo.Cells[this.ColumnIndex].Value = valueState;
                    }
                }
                this.MasterTemplate.MasterViewInfo.TableSearchRow.ResumeSearch();
                this.TableElement.EndUpdate(false);

                if (this.ViewTemplate != null && !this.ViewTemplate.IsSelfReference && !this.MasterTemplate.IsSelfReference)
                {
                    this.MasterTemplate.EndUpdate(true, new DataViewChangedEventArgs(ViewChangedAction.DataChanged));
                }
                else
                {
                    this.TableElement.EndUpdate(false);
                }

                this.TableElement.Update(GridUINotifyAction.DataChanged);
            }

            private void CheckAllCheckBoxInChildRows(GridViewGroupRowInfo row, object state)
            {
                List<GridViewRowInfo> list = new List<GridViewRowInfo>();

                foreach (GridViewRowInfo rowInfo in row.ChildRows)
                {
                    list.Add(rowInfo);
                }

                foreach (GridViewRowInfo rowInfo in list)
                {
                    GridViewGroupRowInfo groupInfo = rowInfo as GridViewGroupRowInfo;
                    if (groupInfo != null)
                    {
                        this.CheckAllCheckBoxInChildRows(groupInfo, state);
                    }
                    else
                    {
                        rowInfo.Cells[this.ColumnIndex].Value = state;
                    }
                }
            }

            private List<GridViewRowInfo> GetRowsToIterateOver()
            {
                if (this.ViewTemplate != null && this.ViewTemplate.IsSelfReference)
                {
                    PrintGridTraverser traverser = new PrintGridTraverser(this.ViewInfo);
                    List<GridViewRowInfo> result = new List<GridViewRowInfo>();

                    while (traverser.MoveNext())
                    {
                        if (traverser.Current is GridViewDataRowInfo)
                        {
                            result.Add(traverser.Current);
                        }
                    }

                    return result;
                }

                return new List<GridViewRowInfo>(this.ViewInfo.Rows);
            }
        }
    }
Completed
Last Updated: 17 Jul 2019 07:33 by ADMIN
Release R3 2019 (LIB 2019.2.722)
Completed
Last Updated: 15 Jul 2019 08:33 by ADMIN
Release R3 2019 (LIB 2019.2.722)
Created by: Daniel
Comments: 1
Category: GridView
Type: Bug Report
6

Steps to reproduce:

  1. Click column header to sort.
  2. Click button which to export to Excel.
  3. The rows return to unsorted.
  4. Scroll down slightly and scroll back up and the sort is restored.

This happens after calling RunExport.

I attached a gif and a sample project.

Completed
Last Updated: 01 Jul 2019 15:04 by ADMIN
Release R3 2019 (LIB 2019.2.708)

UI for WinForms R2 2019 SP1 (version 2019.2.618)

June 19, 2019

RadGridView

NEW
  • New property inside GridViewSearchRowInfo: DeferredSearch. Gets or sets a value indicating whether grid will wait until enter key is pressed before it starts a search.

 

 

I have implemented this and it is exactly what I want and need, Thank you! 
However I thought I might point out that when you tab out it doesn't implement the search, only when you press enter.

And when you press the X to clear the search it clears the text box but not the search. the count of found and the highlighted finds remain 

Completed
Last Updated: 28 Jun 2019 08:50 by ADMIN
Release R2 2019 SP1
Created by: Sasa
Comments: 2
Category: GridView
Type: Bug Report
1
RadGridView data source contains date values from years 2018 and 2019. After adding Excel like filters to the RadGridView and selecting year 2019 no rows were displayed, even though some values did match the filter condition (see attachment).
Completed
Last Updated: 06 Jun 2019 13:44 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.610)
Created by: Comparto
Comments: 1
Category: GridView
Type: Feature Request
1
Add deferred search like in WPF suite
Completed
Last Updated: 06 Jun 2019 13:28 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.610)
Created by: James
Comments: 1
Category: GridView
Type: Bug Report
1

To reproduce:

- Set the AutoSize to true

- Add GroupDescriptor

- An InvalidOperationException is thrown

Completed
Last Updated: 06 Jun 2019 13:25 by ADMIN
Release R2 2019 SP1 (LIB 2019.2.610)
To reproduce:

Sub New()
     
    InitializeComponent()

    Dim dt1 As New DataTable
    dt1.Columns.Add("Id", GetType(Integer))
    dt1.Columns.Add("Name", GetType(String))
    For index = 1 To 20
        dt1.Rows.Add(index, "Parent" & index)
    Next
    Me.RadGridView1.MasterTemplate.DataSource = dt1
    Me.RadGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill

    Dim dt2 As New DataTable
    dt2.Columns.Add("Id", GetType(Integer))
    dt2.Columns.Add("Name", GetType(String))
    dt2.Columns.Add("ParentId", GetType(Integer))

    Dim dt3 As New DataTable
    dt3.Columns.Add("Id", GetType(Integer))
    dt3.Columns.Add("Name", GetType(String))
    dt3.Columns.Add("ParentId", GetType(Integer))
    For index = 1 To 20
        If index Mod 2 = 0 Then
            dt2.Rows.Add(index, "Child1." & index, index)
            If index Mod 4 = 0 Then
                dt3.Rows.Add(index, "Child2." & index, index)
            End If
        ElseIf index Mod 3 = 0 Then
            dt3.Rows.Add(index, "Child2." & index, index)
        Else
            dt3.Rows.Add(index, "Child2." & index, index)
        End If

    Next

    Dim template As New GridViewTemplate()
    template.DataSource = dt2
    template.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill
    RadGridView1.MasterTemplate.Templates.Add(template)

    Dim relation As New GridViewRelation(RadGridView1.MasterTemplate)
    relation.ChildTemplate = template
    relation.RelationName = "FirstChild"
    relation.ParentColumnNames.Add("Id")
    relation.ChildColumnNames.Add("ParentId")
    RadGridView1.Relations.Add(relation)

    Dim template2 As New GridViewTemplate()
    template2.DataSource = dt3
    template2.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill
    RadGridView1.MasterTemplate.Templates.Add(template2)

    Dim relation2 As New GridViewRelation(RadGridView1.MasterTemplate)
    relation2.ChildTemplate = template2
    relation2.RelationName = "SecondChild"
    relation2.ParentColumnNames.Add("Id")
    relation2.ChildColumnNames.Add("ParentId")
    RadGridView1.Relations.Add(relation2)

    AddHandler Me.RadGridView1.ChildViewExpanding, AddressOf ChildViewExpanding
End Sub

Private Sub RadGridView1_ViewCellFormatting(sender As Object, e As Telerik.WinControls.UI.CellFormattingEventArgs) _
Handles RadGridView1.ViewCellFormatting
    Dim cell As GridDetailViewCellElement = TryCast(e.CellElement, GridDetailViewCellElement)
    Dim expanderCell As GridGroupExpanderCellElement = TryCast(e.CellElement, GridGroupExpanderCellElement)
    If expanderCell IsNot Nothing AndAlso TypeOf e.CellElement.RowElement Is GridDataRowElement Then
        Dim hierarchyRow As GridViewHierarchyRowInfo = DirectCast(expanderCell.RowInfo, GridViewHierarchyRowInfo)
        If Not IsExpandable(hierarchyRow) Then
            expanderCell.Expander.Visibility = Telerik.WinControls.ElementVisibility.Hidden
        Else
            expanderCell.Expander.Visibility = Telerik.WinControls.ElementVisibility.Visible
        End If
    ElseIf cell IsNot Nothing Then
        Dim hierarchyRow As GridViewHierarchyRowInfo = DirectCast(DirectCast(cell.RowInfo, GridViewDetailsRowInfo).Owner,  _
        GridViewHierarchyRowInfo)
        For i As Integer = 0 To cell.PageViewElement.Items.Count - 1
            Dim item As RadPageViewItem = cell.PageViewElement.Items(i)
            Dim viewInfo As GridViewInfo = hierarchyRow.Views(i)
            item.Text = "Child Template " & i
            If viewInfo.ChildRows.Count = 0 Then
                If i = 0 AndAlso i < cell.PageViewElement.Items.Count - 1 Then
                    cell.PageViewElement.Items(i + 1).IsSelected = True
                End If
                item.Visibility = Telerik.WinControls.ElementVisibility.Hidden
            Else
                item.Visibility = Telerik.WinControls.ElementVisibility.Visible
            End If
        Next
    End If
End Sub

Private Function IsExpandable(hierarchyRow As GridViewHierarchyRowInfo) As Boolean
    For Each view As GridViewInfo In hierarchyRow.Views
        If view.ChildRows.Count > 0 Then
            Return True
        End If
    Next
    Return False
End Function

Workaround:

AddHandler Me.RadGridView1.ChildViewExpanding, AddressOf RadGridView1_ChildViewExpanding 
AddHandler Me.RadGridView1.MouseDown, AddressOf RadGridView_MouseDown

Private Sub RadGridView1_ChildViewExpanding(sender As Object, e As ChildViewExpandingEventArgs)
    If lastClicked IsNot Nothing AndAlso e.ParentRow.Equals(lastClicked) Then
        e.Cancel = False
    Else
        e.Cancel = True
    End If

End Sub

Dim lastClicked As GridViewRowInfo

Private Sub RadGridView_MouseDown(sender As Object, e As MouseEventArgs)
    Dim expander As GridExpanderItem = TryCast(Me.RadGridView1.ElementTree.GetElementAtPoint(e.Location), GridExpanderItem)
    If expander IsNot Nothing Then
        lastClicked = DirectCast(expander.Parent, GridGroupExpanderCellElement).RowInfo 
    End If 
End Sub
Completed
Last Updated: 16 May 2019 08:57 by ADMIN
Release R1 2019
ADMIN
Created by: Dimitar
Comments: 0
Category: GridView
Type: Bug Report
1
To reproduce:
- Add a checkbox column and hide some of the cells.
- Change some values and then click on empty cell.
- Exception occurs in OnMouseDownLeft method (GridRowBeahvior class)

Workaround:

Hide the checkbox only.
1 2 3 4 5 6