Tool Part Class Implementation with the ability to specify Table Layout properties

CBQTableLayoutToolPart.cs

using System;
using System.Globalization;
using System.Web.UI.WebControls;

namespace CQWPWithTableLayout.WebControls
{
    public class CBQTableLayoutToolPart : Microsoft.SharePoint.WebPartPages.ToolPart
    {
        public CBQTableLayoutToolPart()
        {
            Init += InitToolPart;
        }


        private void InitToolPart(object sender, EventArgs e)
        {
            Title = "Table Layout Settings";
            _targetWebPart = ParentToolPane.SelectedWebPart as CBQTableLayout;
            if (_targetWebPart == null)
                throw new Exception("Wrong web part type error");
        }


        protected override void CreateChildControls()
        {
            CreateTableLayoutSection();
            PopulateTableLayoutSection();
            base.CreateChildControls();
        }

        public override void ApplyChanges()
        {
            this.ApplySettingsSectionChanges();
            base.ApplyChanges();
        }


        private void CreateTableLayoutSection()
        {
            _columnsBox = new TextBox {MaxLength = 2};
            _directionBox = new DropDownList();
            var mainTable = new Table { CellPadding = 2, CellSpacing = 2 };
            mainTable.Style["border-collapse"] = "collapse";
            //Repeat Columns
            AddRepeatColumnsProperty(mainTable);
            //Repeat Direction
            AddRepeatDirectionProperty(mainTable);
            Controls.Add(mainTable);
        }

      
        private void AddRepeatColumnsProperty(Table section)
        {
            var rowHeader = new TableRow();
            var cellHeader = new TableCell { Text = "Repeat Columns" };
            rowHeader.Cells.Add(cellHeader);
            section.Rows.Add(rowHeader);
            var rowItem = new TableRow();
            var cellItem = new TableCell();
            cellItem.Controls.Add(_columnsBox);
            rowItem.Cells.Add(cellItem);
            section.Rows.Add(rowItem);
        }


        private void AddRepeatDirectionProperty(Table section)
        {
            var rowHeader = new TableRow();
            var cellHeader = new TableCell { Text = "Repeat Direction" };
            rowHeader.Cells.Add(cellHeader);
            section.Rows.Add(rowHeader);
            var rowItem = new TableRow();
            var cellItem = new TableCell();
            cellItem.Controls.Add(_directionBox);
            rowItem.Cells.Add(cellItem);
            section.Rows.Add(rowItem);
        }



        private void PopulateTableLayoutSection()
        {
            _columnsBox.Text = _targetWebPart.RepeatColumns.ToString(CultureInfo.InvariantCulture);
            var directions = Enum.GetValues(typeof(RepeatDirection));
            _directionBox.DataSource = directions;
            _directionBox.DataBind();
            _directionBox.Text = _targetWebPart.RepeatDirection.ToString();
        }

        protected void ApplySettingsSectionChanges()
        {
            _targetWebPart.RepeatColumns = int.Parse(_columnsBox.Text);
            _targetWebPart.RepeatDirection = (RepeatDirection)Enum.Parse(typeof(RepeatDirection), _directionBox.Text); 
        }

        private TextBox _columnsBox;
        private DropDownList _directionBox;
        private CBQTableLayout _targetWebPart;
    }
}