HYTOS

using Telerik.WinControls.RadControlSpy;

            //RadControlSpyForm radControlSpyForm = new RadControlSpyForm();

            //radControlSpyForm.Show();

            InitializeSearch();

        }

        private void InitializeSearch()

        {

            lbSearch.Text = "\ue13E";

            btnSearchNext.Text = "\ue006";

            btnSearchPrevious.Text = "\ue004";

            btnFilterColumns.Text = "\ue13A";

            var chkbox = new RadCheckBoxElement();

            chkbox.Text = "Match Case";

            chkbox.CheckStateChanged += (snd, evt) => { radGridViewDocuments.MasterView.TableSearchRow.CaseSensitive = chkbox.Checked; };

            btnMatchCase.HostedItem = chkbox;

            var chkbox2 = new RadCheckBoxElement();

            chkbox2.Text = "Search from current position";

            chkbox2.CheckStateChanged += (snd, evt) => { radGridViewDocuments.MasterView.TableSearchRow.SearchFromCurrentPosition = chkbox.Checked; };

            btnSearchFormCurrent.HostedItem = chkbox2;

            var columns = radGridViewDocuments.Columns.Where(x=> x.AllowSearching).Select(x =>

                                new FilterColumn

                                { 

                                    Name = x.HeaderText,

                                    FieldName = x.FieldName,

                                    IsSelect = x.AllowSearching

                                });

            var panel = new StackLayoutElement();

            panel.Orientation = Orientation.Vertical;

             var btnSelect = new RadCheckBoxElement { Text = "Select All", Checked = true, AccessibleDescription = "SelectAll" };

            var btnComboColumns = new RadCheckedDropDownListElement();

            btnComboColumns.ShowCheckAllItems = true;

            btnComboColumns.CheckAllItem.Checked = true;

            btnComboColumns.AutoCompleteEditableAreaElement.NullText = "Search in Columns";

            btnComboColumns.AutoCompleteEditableAreaElement.AutoCompleteTextBox.IsReadOnly = true;

            //btnComboColumns.AutoCompleteDisplayMember = "Name";

            btnComboColumns.DropDownMinSize = new Size(200, 200);

            btnComboColumns.DropDownSizingMode = SizingMode.UpDownAndRightBottom;

            //foreach (var item in columns)

            //{

            //    item.CheckStateChanged += (snd, evt) => { radGridViewDocuments.Columns[item.AccessibleDescription].AllowSearching = item.Checked; };

            //    btnFilterColumns.Items.Add(item);

            //}

            btnComboColumns.DisplayMember = "Name";

            btnComboColumns.CheckedMember = "IsSelect";

            btnComboColumns.ValueMember = "FieldName";

            var font1 = ThemeResolutionService.GetCustomFont("TelerikWebUI");

            btnComboColumns.TextBox.CustomFont = font1.Name;

            btnComboColumns.TextBox.Text = "\ue13A";

            btnComboColumns.DataSource = columns;

            btnComboColumns.PopupClosed += (snd, evt) =>

            {

                foreach (RadCheckedListDataItem item in btnComboColumns.Items)

                {

                    radGridViewDocuments.Columns[item.Value.ToString()].AllowSearching = item.Checked;

                }

            };

            //panel.Children.Add(btnSelect);

            //panel.Children.Add(new SeparatorElement());

            //panel.Children.Add(btnComboColumns);

            btnFilters.HostedItem = btnComboColumns;

        private void txtFullSearch_TextChanged(object sender, EventArgs e)

        {

            txtFullSearch.TextBoxElement.ShowClearButton = !string.IsNullOrWhiteSpace(txtFullSearch.Text);

            radGridViewDocuments.MasterView.TableSearchRow.Search(txtFullSearch.Text);

        }

        private void btnSearchPrevious_Click(object sender, EventArgs e)

        {

            radGridViewDocuments.MasterView.TableSearchRow.SelectPreviousSearchResult();

        }

        private void btnSearchNext_Click(object sender, EventArgs e)

        {

            radGridViewDocuments.MasterView.TableSearchRow.SelectNextSearchResult();

        }

public class FilterColumn

{

    public string Name { get; set; }

    public string FieldName { get; set; }

    public bool IsSelect { get; set; }

}