FIX. RadGridView - setting the grid to ReadOnly and then back to normal mode, does not show the AddNewRow

To reproduce:
Add a RadGridView with a ComboBoxColumn, add a datasource, use the following code on CellEditorInitializedEvent:
void GridView_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    GridViewComboBoxColumn column = e.Column as GridViewComboBoxColumn;
    if (column != null)
    {
        RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;
        if (editor != null)
        {
            RadDropDownListEditorElement editorElement = editor.EditorElement as RadDropDownListEditorElement;
            if (editorElement != null)
            {
                editorElement.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
            }
        }
    }
}

Run the project, select a value from one of the dropdowns, start editing, press backspace, press the key which corresponds to the deleted character, for example if the last character was '2', press the key '2'. You will notice that the key will be ignored.

Workaround:

void GridView_CellEditorInitialized(object sender, GridViewCellEventArgs e)
{
    GridViewComboBoxColumn column = e.Column as GridViewComboBoxColumn;
    if (column != null)
    {
        RadDropDownListEditor editor = e.ActiveEditor as RadDropDownListEditor;
        if (editor != null)
        {
            RadDropDownListEditorElement editorElement = editor.EditorElement as RadDropDownListEditorElement;
            editorElement.TextBox.KeyPress -= TextBox_KeyPress;
            editorElement.TextBox.KeyPress += TextBox_KeyPress;
            if (editorElement != null)
            {
                editorElement.AutoCompleteMode = AutoCompleteMode.SuggestAppend;
            }
        }
    }
}

private MethodInfo baseMethod = null;

void TextBox_KeyPress(object sender, KeyPressEventArgs e)
{
    if (char.IsLetterOrDigit(e.KeyChar))
    {
        RadDropDownListEditorElement editorElement = ((this.GridView.ActiveEditor as RadDropDownListEditor).EditorElement as RadDropDownListEditorElement);
        MethodInfo method = baseMethod == null ? 
            baseMethod = typeof(AutoCompleteAppendHelper).GetMethod("SetEditableElementText", 
            System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance)
            : baseMethod;

        InvokeNotOverride(method, editorElement.AutoCompleteAppend, editorElement.AutoCompleteAppend.FindShortestString(editorElement.Text + e.KeyChar));
        editorElement.TextBox.TextBoxItem.TextBoxControl.SelectionStart = editorElement.Text.Length;
    }
}

public object InvokeNotOverride(MethodInfo methodInfo,
                object targetObject, params object[] arguments)
{
    var parameters = methodInfo.GetParameters();

    if (parameters.Length == 0)
    {
        if (arguments != null && arguments.Length != 0)
            throw new Exception("Arguments cont doesn't match");
    }
    else if (parameters.Length != arguments.Length)
    {
        throw new Exception("Arguments cont doesn't match");
    }

    Type returnType = null;
    if (methodInfo.ReturnType != typeof(void))
    {
        returnType = methodInfo.ReturnType;
    }

    var type = targetObject.GetType();
    var dynamicMethod = new DynamicMethod("", returnType,
            new Type[] { type, typeof(Object) }, type);

    var iLGenerator = dynamicMethod.GetILGenerator();
    iLGenerator.Emit(OpCodes.Ldarg_0);

    for (var i = 0; i < parameters.Length; i++)
    {
        var parameter = parameters[i];

        iLGenerator.Emit(OpCodes.Ldarg_1);

        iLGenerator.Emit(OpCodes.Ldc_I4_S, i);
        iLGenerator.Emit(OpCodes.Ldelem_Ref);

        var parameterType = parameter.ParameterType;
        if (parameterType.IsPrimitive)
        {
            iLGenerator.Emit(OpCodes.Unbox_Any, parameterType);
        }
        else
        {
            iLGenerator.Emit(OpCodes.Castclass, parameterType);
        }
    }

    iLGenerator.Emit(OpCodes.Call, methodInfo);
    iLGenerator.Emit(OpCodes.Ret);

    return dynamicMethod.Invoke(null, new object[] { targetObject, arguments });
}

To reproduce:
Add a GridViewImageColumn and set its FieldName to something that returns an empty string. You will notice that in the output window numerous first chance exceptions are being thrown.

To reproduce use this code:

public partial class Form1 : Form
{
    RadGridView radGridView1 = new RadGridView();

    public Form1()
    {
        InitializeComponent();
        this.Controls.Add(this.radGridView1);
        this.radGridView1.Dock = DockStyle.Fill;

        this.radGridView1.AutoGenerateColumns = false;
        this.radGridView1.TableElement.RowHeight = 30;
        this.radGridView1.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
        this.radGridView1.AddNewRowPosition = SystemRowPosition.Bottom;
        this.radGridView1.EnterKeyMode = RadGridViewEnterKeyMode.EnterMovesToNextCell;
        this.radGridView1.NewRowEnterKeyMode = RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell;
        this.radGridView1.BeginEditMode = Telerik.WinControls.RadGridViewBeginEditMode.BeginEditOnKeystrokeOrF2;
        this.radGridView1.EnableGrouping = false;
        this.radGridView1.EnableAlternatingRowColor = true;
        this.radGridView1.AllowAddNewRow = true;
        this.radGridView1.AllowEditRow = true;
        this.radGridView1.AllowDeleteRow = true;
        this.radGridView1.EnableFiltering = true;
        this.radGridView1.EnableSorting = true;

        ArrayList arrayList = new ArrayList();

        arrayList.Add(new Person() { Name = "Jack", Family = "J..." });
        arrayList.Add(new Person() { Name = "Bob", Family = "B..." });
        arrayList.Add(new Person() { Name = "Dani", Family = "D..." });

        radGridView1.Columns.Add("ColName", "Name", "Name");
        radGridView1.Columns.Add("ColFamily", "Family", "Family");

        radGridView1.DataSource = arrayList;

        this.radGridView1.CellValidating +=radGridView1_CellValidating;

    }

    private void radGridView1_CellValidating(object sender, CellValidatingEventArgs e)
    {
        GridViewDataColumn column = e.Column as GridViewDataColumn;
        if ((e.Row is GridViewDataRowInfo || e.Row is GridViewNewRowInfo) && column != null
            && (column.Name == "ColName"))
        {
            if (e.Value == null || ((string)e.Value).Trim() == "") if (string.IsNullOrEmpty
                ((string)e.Value) || ((string)e.Value).Trim() == string.Empty || string.IsNullOrWhiteSpace

                ((string)e.Value))
                {
                    if (e.ActiveEditor != null)
                    {
                        MessageBox.Show("Please enter your name");
                        e.Cancel = true;
                    }
                }
        }
    }
}

public class Person
{

    private string name;
    private string family;

    public string Name
    {
        get { return name; }
        set { name = value; }
    }

    public string Family
    {
        get { return family; }
        set { family = value; }
    }
}

Try to add a new row by clicking the cell of the first column and leaving it empty. You will see the messagebox twice.

Workaround:

public class MyGridRowBehavior : GridNewRowBehavior
{
    protected override bool ProcessEnterKey(KeyEventArgs keys)
    {
        GridViewNewRowInfo newRowInfo = (GridViewNewRowInfo)this.GridViewElement.CurrentRow;

        if (this.GridViewElement.NewRowEnterKeyMode == RadGridViewNewRowEnterKeyMode.EnterMovesToNextCell)
        {
            bool editorClosed = !this.IsInEditMode;
            if (this.IsInEditMode)
            {
                if (this.IsOnLastCell())
                {
                    if (newRowInfo != null)
                    {
                        newRowInfo.GetType().GetMethod("DeferUserAddedRow", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).Invoke(newRowInfo, null);
                    }

                    editorClosed = GridViewElement.EndEdit();
                }
                else
                {
                    editorClosed = GridViewElement.CloseEditor();
                }
            }

            if (editorClosed)
            {
                this.Navigator.SelectNextColumn();
                this.GridViewElement.BeginEdit();
            }

            if (this.IsInEditMode && this.GridViewElement.CurrentRow is GridViewNewRowInfo &&
                this.GridViewElement.BeginEditMode != RadGridViewBeginEditMode.BeginEditProgrammatically)
            {
                return this.GridViewElement.BeginEdit();
            }

            if (newRowInfo != null)
            {
                newRowInfo.GetType().GetMethod("RaiseUserAddedRow", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).Invoke(newRowInfo, null);
            }

            return false;
        }
        
        return base.ProcessEnterKey(keys);
    }
}

((BaseGridBehavior)this.radGridView1.GridBehavior).UnregisterBehavior(typeof(GridViewNewRowInfo));
((BaseGridBehavior)this.radGridView1.GridBehavior).RegisterBehavior(typeof(GridViewNewRowInfo), new MyGridRowBehavior());

To reproduce:
this.grid.Columns.Add(new GridViewDecimalColumn("col"));
for (int i = 0; i < 5; i++)
{
    this.grid.Rows.Add(i);
}

GridViewSummaryItem stDev = new GridViewSummaryItem()
{
    Name = "col",
    Aggregate = GridAggregateFunction.Var // or GridAggregateFunction.StDev
};
var row = new GridViewSummaryRowItem();
row.Add(stDev);
this.grid.SummaryRowsTop.Add(row);

This will throw an exception.

To reproduce: Create a project with RadGridView, add some rows, make sure you have space to perform panning. Pan up and down, exception should occur. Workaround :

radgridView1.ViewDefinition = new MyTableViewDefinition();

public class MyTableViewDefinition : TableViewDefinition
{
    public override IRowView CreateViewUIElement(GridViewInfo viewInfo)
    {
        return new MyGridTableElement();
    }
}

public class MyGridTableElement : GridTableElement
{
    protected override void OnPanGesture(Telerik.WinControls.PanGestureEventArgs args)
    {

        //base.OnPanGesture(args) -> you can stop touch support by also not calling the base and leaving this method empty
        if (args.IsBegin &&
             (this.RowScroller.Scrollbar.ControlBoundingRectangle.Contains(args.Location) ||
             this.ColumnScroller.Scrollbar.ControlBoundingRectangle.Contains(args.Location) ||
             this.ViewElement.TopPinnedRows.ControlBoundingRectangle.Contains(args.Location)))
        {
            return;
        }

        bool containsCurrent = (this.GridViewElement.CurrentRow == null && this.GridViewElement.Template == this.ViewTemplate);
        if (!containsCurrent)
        {
            foreach (IRowView child in this.GridViewElement.GetRowViews(this.GridViewElement.CurrentRow.ViewInfo))
            {
                containsCurrent |= (child == this);
            }
        }

        if (!containsCurrent)
        {
            return;
        }

        this.GridViewElement.EndEdit();
        int newVerticalValue = this.RowScroller.Scrollbar.Value - args.Offset.Height;

        if (newVerticalValue > this.RowScroller.Scrollbar.Maximum - this.RowScroller.Scrollbar.LargeChange + 1)
        {
            newVerticalValue = this.RowScroller.Scrollbar.Maximum - this.RowScroller.Scrollbar.LargeChange + 1;
        }
        if (newVerticalValue < this.RowScroller.Scrollbar.Minimum)
        {
            newVerticalValue = this.RowScroller.Scrollbar.Minimum;
        }

        RadScrollBarElement rowScrollbar = this.RowScroller.Scrollbar;
        if (newVerticalValue > rowScrollbar.Maximum)
        {
            newVerticalValue = rowScrollbar.Maximum;
        }
        else if (newVerticalValue < 0)
        {
            newVerticalValue = 0;
        }

        this.RowScroller.Scrollbar.Value = newVerticalValue;

        int newHorizontalValue = this.ColumnScroller.Scrollbar.Value - args.Offset.Width;
        if (newHorizontalValue > this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1)
        {
            newHorizontalValue = this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1;
        }
        if (newHorizontalValue < this.ColumnScroller.Scrollbar.Minimum)
        {
            newHorizontalValue = this.ColumnScroller.Scrollbar.Minimum;
        }

        RadScrollBarElement columnScrollBar = this.ColumnScroller.Scrollbar;
        if (newHorizontalValue > columnScrollBar.Maximum)
        {
            newHorizontalValue = columnScrollBar.Maximum;
        }
        else if (newHorizontalValue < 0)
        {
            newHorizontalValue = 0;
        }

        this.ColumnScroller.Scrollbar.Value = newHorizontalValue;
        args.Handled = true;
    }
}

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:
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 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 second cell in first row.
3. Expand first row and select 3 cells in fifth column by mouse drag
4. Right click on selection and "Copy" or press Ctrl+C.
5. Try to Paste the data into 7-th column.
6. The data is pasted in the second column

To reproduce: Create a project with RadGridView, add some rows, make sure you have space to perform panning. Exception should occur. Workaround: this.myGridView.ViewDefinition = new MyTableViewDefinition(); public class MyTableViewDefinition : TableViewDefinition { public override IRowView CreateViewUIElement(GridViewInfo viewInfo) { return new MyGridTableElement(); } } public class MyGridTableElement : GridTableElement { protected override void OnPanGesture(Telerik.WinControls.PanGestureEventArgs args) { if (args.IsBegin && (this.RowScroller.Scrollbar.ControlBoundingRectangle.Contains(args.Location) || this.ColumnScroller.Scrollbar.ControlBoundingRectangle.Contains(args.Location) || this.ViewElement.TopPinnedRows.ControlBoundingRectangle.Contains(args.Location))) { return; } bool containsCurrent = (this.GridViewElement.CurrentRow == null && this.GridViewElement.Template == this.ViewTemplate); if (!containsCurrent) { foreach (IRowView child in this.GridViewElement.GetRowViews(this.GridViewElement.CurrentRow.ViewInfo)) { containsCurrent |= (child == this); } } if (!containsCurrent) { return; } this.GridViewElement.EndEdit(); int newVerticalValue = this.RowScroller.Scrollbar.Value - args.Offset.Height; if (newVerticalValue > this.RowScroller.Scrollbar.Maximum - this.RowScroller.Scrollbar.LargeChange + 1) { newVerticalValue = this.RowScroller.Scrollbar.Maximum - this.RowScroller.Scrollbar.LargeChange + 1; } if (newVerticalValue < this.RowScroller.Scrollbar.Minimum) { newVerticalValue = this.RowScroller.Scrollbar.Minimum; } this.RowScroller.Scrollbar.Value = newVerticalValue; int newHorizontalValue = this.ColumnScroller.Scrollbar.Value - args.Offset.Width; if (newHorizontalValue > this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1) { newHorizontalValue = this.ColumnScroller.Scrollbar.Maximum - this.ColumnScroller.Scrollbar.LargeChange + 1; } if (newHorizontalValue < this.ColumnScroller.Scrollbar.Minimum) { newHorizontalValue = this.ColumnScroller.Scrollbar.Minimum; } RadScrollBarElement scrollbar = this.ColumnScroller.Scrollbar; if (newHorizontalValue > scrollbar.Maximum) { newHorizontalValue = scrollbar.Maximum; } else if (newHorizontalValue < 0) { newHorizontalValue = 0; } this.ColumnScroller.Scrollbar.Value = newHorizontalValue; args.Handled = true; } }

1. Create a new project with RadGridView
2. Bind the grid to a data source containing 200k rows
3. Allow the multiple row selection (MultiSelect = true)
4. Run the application
5. Select all rows (Ctrl+A)
6. Scroll down
7.Try to select another row

There is an exception when the new row is current and clicking on a column header. Steps to reproduce:

1. click to add a row but don't make a selection
2. click on the row header

1. Create a new project with RadGridView
2. Create and add a column which uses editor based on RadMultiColumnComboBox
3. Run the project and try to filter by this column

1. Create a new project with RadGridView.
2. Bind it to a data source with two columns and make the first one read only.
3. Handle the CellValidating event and add a condition to validate the second column.
4. Run the project and enter invalid value in second column.
5. Now enter a correct value and press Tab key. You will be navigated to a wrong row.

1. Create a new project with RadGridView.
2. Set AutoSizeRows to true and WrapText in one of the columns to true.
3. Set the ApplicationThemeName to Aqua.
4. Set EnableFiltering to true.
5. Run the application and filter by the first column, the filtering row resizes correctly. Now filter the column where WrapText is set to true. It will not resize correctly.

This method should return true if successful.

1. Create RadGridView with hierarchy.
2. Set UseScrollbarsInHierarchy property to true.
3. Handle the CellDoubleClick event.
4. Run the project, open a child view and double click on its scrollbar. The CellDoubleClick event will fire which is wrong.

1. Create a new project with RadGridView. 

2. Make all columns read only. 

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

1. Create a new project and add RadGridView.
2. Bind a hierarchy.
3. Set MultiSelect property to true.
4. Replace default GridViewHierarchyRowInfo class with a custom one and override its SetBooleanProperty method.
5. Change child rows IsSelected property when parent row IsSelected property changes.
6. Run the project and try to select rows with the mouse.

1. Create a new project with RadGridView.
2. Add a column containing TimeSpan values.
3. Add a method which exports RadGridView in ExcelML.
4. Run the project and export the grid.