To reproduce:
Generate the hierarchy with the following code:
radGridView1.SelectionMode = GridViewSelectionMode.CellSelect;
            radGridView1.MultiSelect = true;
            radGridView1.ClipboardCopyMode = GridViewClipboardCopyMode.EnableWithoutHeaderText;
            radGridView1.ClipboardPasteMode = GridViewClipboardPasteMode.Enable;
            radGridView1.AutoGenerateColumns = true;

            radGridView1.CellValueChanged += grid_CellValueChanged;
            //radGridView1.ViewCellFormatting += GridCellFormatting;
            //radGridView1.RowFormatting += grid_RowFormatting;
            radGridView1.EnableSorting = true;
            //radGridView1.MasterTemplate.EnableCustomSorting = true;
            radGridView1.AllowMultiColumnSorting = true;
            radGridView1.ShowGroupPanel = true;
            radGridView1.EnableFiltering = true;
            radGridView1.ShowFilteringRow = false;
            radGridView1.MasterTemplate.ShowHeaderCellButtons = true;

            DataTable dt1 = new DataTable();
            dt1.Columns.Add("Column1");
            dt1.Columns.Add("Column2");
            dt1.Columns.Add("Column3");
            dt1.Columns.Add("Column4");
            dt1.Columns.Add("Column5");
            dt1.Columns.Add("Column6");
            dt1.Columns.Add("Column7");
            dt1.Columns.Add("Column8");
            dt1.Columns.Add("Column9");
            dt1.Columns.Add("Column10");
            DataTable dt2 = new DataTable();
            dt2.Columns.Add("Column1");
            dt2.Columns.Add("Column2");
            dt2.Columns.Add("Column3");
            dt2.Columns.Add("Column4");
            dt2.Columns.Add("Column5");
            dt2.Columns.Add("Column6");
            dt2.Columns.Add("Column7");
            dt2.Columns.Add("Column8");
            dt2.Columns.Add("Column9");

            var temp = new GridViewTemplate();
            temp.AutoGenerateColumns = true;
            radGridView1.Templates.Add(temp);
            var rel = new GridViewRelation(radGridView1.MasterTemplate, temp);
            rel.ChildColumnNames.Add("Column1");
            rel.ParentColumnNames.Add("Column1");
            radGridView1.Relations.Add(rel);

            radGridView1.MasterTemplate.DataSource = dt1;
            dt1.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(2, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(3, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(4, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(5, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);

            dt2.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(2, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(2, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            temp.DataSource = dt2;

1. Run the project with the generated hierarchy
2. Select Last cell in first row. (there is no "Column9" in Child Template)
3. Expand first row and select any cell in first child row.
4. Hold Shift-Key and press down arrow or up arrow until you receive a NullReferenceException.

To reproduce: 
- generate the hierarchy using the following code:
radGridView1.SelectionMode = GridViewSelectionMode.CellSelect;
            radGridView1.MultiSelect = true;
            radGridView1.ClipboardCopyMode = GridViewClipboardCopyMode.EnableWithoutHeaderText;
            radGridView1.ClipboardPasteMode = GridViewClipboardPasteMode.Enable;
            radGridView1.AutoGenerateColumns = true;

            radGridView1.CellValueChanged += grid_CellValueChanged;
            radGridView1.EnableSorting = true;
            radGridView1.AllowMultiColumnSorting = true;
            radGridView1.ShowGroupPanel = true;
            radGridView1.EnableFiltering = true;
            radGridView1.ShowFilteringRow = false;
            radGridView1.MasterTemplate.ShowHeaderCellButtons = true; 

            DataTable dt1 = new DataTable();
            DataTable dt2 = new DataTable();
            for (int i = 0; i < 10; i++)
            {
                dt1.Columns.Add("Column" + i);
                dt2.Columns.Add("Column" + i);
            }

            var temp = new GridViewTemplate();
            temp.AutoGenerateColumns = true;
            radGridView1.Templates.Add(temp);
            var rel = new GridViewRelation(radGridView1.MasterTemplate, temp);
            rel.ChildColumnNames.Add("Column1");
            rel.ParentColumnNames.Add("Column1");
            radGridView1.Relations.Add(rel);

            radGridView1.MasterTemplate.DataSource = dt1;
            dt1.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(2, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(3, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(4, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);
            dt1.Rows.Add(5, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6, 9);

            dt2.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(1, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(2, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            dt2.Rows.Add(2, "sdf", "sdfsfqwert", 1, 2, 3, 4, 7, 6);
            temp.DataSource = dt2;

1. Run the project with the generated hierarchy
2. Select second cell in first row.
3. Expand first row and select fifth cell in first child row.
4. Hold Shift-Key and press down arrow after that right arrow twice.
selection will be incorrect

To reproduce:
-set AutoSizeMode to Fill
- Add view definition with two rows
- Add check box column to the view
-Set check box column minWidth 

Workaround:
Create a custom view definition, then create a custom ColumnGroupRowLayout class and override the GetClumnWidth method like this:
class MyViewDefinition : ColumnGroupsViewDefinition
{
 
    public MyViewDefinition()
    {
             
    }
    public override IGridRowLayout CreateRowLayout()
    {
        return new MyRowLayout(this);
    }
}
 
public class MyRowLayout : ColumnGroupRowLayout
{
 
    public MyRowLayout(ColumnGroupsViewDefinition view):base(view)
    {
 
    }
 
    public override int GetColumnWidth(GridViewColumn column)
    {
        return Math.Max( base.GetColumnWidth(column), column.MinWidth);
    }
}

Steps to reproduce: 1. Add three rows to a grid 2. Filter one through CustomFiltering 3. Run the project and apply a filter that will filter one of the remaining two rows 4. Now delete the filter value. You will see that the second row will not be visible although there is no filter. WORKAROUND Clear the filter on the column when the user deletes the value of the filter: private void radGridView1_ValueChanging(object sender, ValueChangingEventArgs e) { if (this.radGridView1.CurrentColumn.Name == "ColumnName" && Convert.ToString(e.NewValue) == String.Empty) { int i = 0; while (i < this.radGridView1.FilterDescriptors.Count) { if (this.radGridView1.FilterDescriptors[i].PropertyName == "ColumnName") { this.radGridView1.FilterDescriptors.RemoveAt(i); continue; } i++; } } }

Workaround, use the following behavior:

 public class CustomDataRowBehavior : GridDataRowBehavior
    {
        protected override bool OnMouseDownRight(MouseEventArgs e)
        {
            if (this.IsInEditMode && !this.GridViewElement.EndEdit())
    

To reproduce, use the following code:
        Dim decimalCol As New GridViewMaskBoxColumn
        decimalCol.FieldName = "DecimalPhone"
        Me.RadGridView1.Columns.Add(decimalCol)
        decimalCol.DataType = GetType(Decimal)
        decimalCol.FormatString = "{0:(###) ###-####}"
        decimalCol.MaskType = MaskType.Standard
        decimalCol.Mask = "(###) ###-####"

Try the following cases:
1. Go to an empty cell and press "1" -> the result is that you see the mask "(1__) ___-_____", however the caret is before it and continuing to type in the editor will replace the already added character
2. Click on an empty cell - the cell is opened for edit, however, the mask is not displayed. Furthermore, when you start typing and you press "1" -> the result is that you see the mask "(1__) ___-_____", however the caret is before it and continuing to type in the editor will replace the already added character

To reproduce, use the following code:
((GridViewMaskBoxColumn)radGridView1.Columns["MaskEditBoxColumn"]).DataType = typeof(decimal);
((GridViewMaskBoxColumn)radGridView1.Columns["MaskEditBoxColumn"]).FormatString = "{0:(###) ###-####}";
((GridViewMaskBoxColumn)radGridView1.Columns["MaskEditBoxColumn"]).MaskType = MaskType.Standard;
((GridViewMaskBoxColumn)radGridView1.Columns["MaskEditBoxColumn"]).Mask = "(###) ###-####";
((GridViewMaskBoxColumn)radGridView1.Columns["MaskEditBoxColumn"]).TextMaskFormat = MaskFormat.ExcludePromptAndLiterals;

and add a numeric value in one of the column cells. Result -> Exception has been thrown by the target of an invocation.

Workaround: Use a custom type converter:
((GridViewMaskBoxColumn)radGridView1.Columns["MaskEditBoxColumn"]).DataTypeConverter = new MyConverter();



        public class MyConverter : TypeConverter
        {
            public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
            {
                return sourceType == typeof(string);
            }

            public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
            {
                if (destinationType == typeof(string))
                {
                    return true;
                }
                return base.CanConvertTo(context, destinationType);
            }

            public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
            {
                if (destinationType == typeof(string))
                {
                    string s = value.ToString();
                    s= s.Insert(0, "(");

                    if (value.ToString().Length > 3)
                    {
                       s= s.Insert(4, ")");
                    }

                    if (value.ToString().Length > 7)
                    {
                        s= s.Insert(8, "-");
                    }

                    return s;
                }

                return base.ConvertTo(context, culture, value, destinationType);
            }

            public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
            {
                string s = value.ToString();
                s = s.Replace("(", "");
                s = s.Replace(")", "");
                s = s.Replace("-", "");
                return Convert.ToDecimal(s);

            }
        }

Currently all export mechanisms export the first child view of a hierarchy row. There should be a mechanism to allow users to choose which view to be exported.

There should be a fit mode which allows one to print a RadGridView on two pages.

If one follows the guide from the online documentation to create custom summary cell element he will no be able to use it in a custom column:
http://www.telerik.com/help/winforms/gridview-cells-custom-cells.html

The issue is that the GetCellType method of the column is never called for summary rows.

To reproduce, use the following localization provider and set a fitler to a boolean column in RadGridView, via the Custom filtering dialog.

  class MyRadGridLocalizationProvider : RadGridLocalizationProvider
        {
            public const string CustomTrue = "CustomTRUE";
            public const string CustomFalse = "CustomFALSE";

            public override string GetLocalizedString(string id)
            {
                if (id == "CustomFilterDialogTrue")
                {
                    return CustomTrue;
                }
                else if (id == "CustomFilterDialogFalse")
                {
                    return CustomFalse;
                }
                else
                {
                    return base.GetLocalizedString(id);
                }
            }
        }

Workaround - create custom type converter as follows:
        public class MyBooleanConverter : BooleanConverter
        {
            public override object ConvertFrom(ITypeDescriptorContext context, System.Globalization.CultureInfo culture, object value)
            {
                if (value is string)
                {
                    string text = Convert.ToString(value);

                    if (text == MyRadGridLocalizationProvider.CustomTrue)
                    {
                        return true;
                    }
                    else if (text == MyRadGridLocalizationProvider.CustomFalse)
                    {
                        return false;
                    }
                }
                return base.ConvertFrom(context, culture, value);
            }
        }

and apply it to the check box column:
   radGridView1.Columns["BoolColumn"].DataTypeConverter = new MyBooleanConverter();

Steps to reproduce:
1. Add a grid to a form and add two expression columns
2. Enable Excel-like filtering
3. Add data
4. Run the project and filter on both expression columns

You will see an exception.

If you end edit of sorted decimal column by pressing ENTER key, the StackOverflowException is thrown.

1. Create a new project with RadGridView and bind it.
2. Add a GridViewComboBoxColumn and bind it to a generic list that contains KeyValuePair instancess. Set the key to be an enum and set the ValueMember property of the column to point to this field.
3. Run the project and try to filter by this column.

To reproduce:
- Set BeginEditMod to BeginEditProgrammatically
- Check/uncheck a check box cell and you will be able to edit the rest of the cells

Currently csv files are exported with UTF-8 encoding. There should be an option allowing users to change it.

Steps to reproduce:
1. Add a RadGridView to a form
2. Add several columns and set their MinWidth to 0
3. Set the grid AutoSizeColumnsMode property to Fill
4. Run the project and you will see that you cannot resize the columns.

WORKAROUND:
Set the MinWidth property to a value greater than 0

To reproduce: GridViewMaskBoxColumn maskBoxColumn = new GridViewMaskBoxColumn(); maskBoxColumn.Name = "MaskEditBoxColumn"; maskBoxColumn.HeaderText = "MaskEditBoxColumn"; maskBoxColumn.MaxLength = 5; maskBoxColumn.MaskType = MaskType.Numeric; maskBoxColumn.Mask = "C"; maskBoxColumn.FormatString = "{0:C}"; radGridView1.MasterTemplate.Columns.Add(maskBoxColumn); WORKAROUND: void radGridView1_CellEditorInitialized(object sender, GridViewCellEventArgs e) { GridSpinEditor editor = e.ActiveEditor as GridSpinEditor; if (editor != null) { GridSpinEditorElement element = (GridSpinEditorElement)editor.EditorElement; element.TextChanging += element_TextChanging; } } void element_TextChanging(object sender, TextChangingEventArgs e) { e.Cancel = e.NewValue.Length > 5; }
Comment : Removed the MaxLength property from GridViewMaskBoxColumn. You should use the Mask property and set an appropriate mask value. For example the #### mask allows entering only 4 digits.

The RadGridView throws unhandled exception, when you try to close the custom filtering form twice for invalid filter descriptor.

1. Create a new project with RadGridView. 

2. Make all columns read only. 

3. Use Ctrl+x, +v and +c key combinations.