header checkbox in datagrid view

hi to all

I have follwoing code in desktop application ..

Code:

---

private void Form1_Load(object sender, EventArgs e)
        {
            this.dataGridView1.Visible = false;
            DataGridViewCheckBoxColumn column = new DataGridViewCheckBoxColumn();

          // column.HeaderText = "All";
          // c1.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;
            column.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;
               
            column.Name = "Selected";
            //column.AutoSizeMode =
            this.dataGridView1.Columns.Add(column);

            ckBox = new CheckBox();

            //Get the column header cell bounds

            Rectangle rect =

                this.dataGridView1.GetCellDisplayRectangle(0, -1, true);

            ckBox.Size = new Size(18, 18);

            //Change the location of the CheckBox to make it stay on the header

            ckBox.Location = rect.Location;

            ckBox.CheckedChanged += new EventHandler(ckBox_CheckedChanged);

            //Add the CheckBox into the DataGridView

            this.dataGridView1.Controls.Add(ckBox);


            //DataGridViewAutoSizeColumnMode.DisplayedCells;
            //column.FlatStyle = FlatStyle.Standard;
            //column.ThreeState = false;
            //column.CellTemplate = new DataGridViewCheckBoxCell();
            //column.CellTemplate.Style.BackColor = Color.Beige;

          // dataGridView1.Columns.Insert(0, column); // This is to be a checkbox column

            //Rectangle rect = dataGridView1.GetCellDisplayRectangle(0, -1, true);
            //// set checkbox header to center of header cell. +1 pixel to position correctly.
            //rect.X = rect.Location.X + (rect.Width / 4);

            //CheckBox checkboxHeader = new CheckBox();
            //checkboxHeader.Name = "checkboxHeader";
            //checkboxHeader.Size = new Size(18, 18);
            //checkboxHeader.Location = rect.Location;
            //checkboxHeader.CheckedChanged += new EventHandler(checkboxHeader_CheckedChanged);



          //  dataGridView1.Controls.Add(checkboxHeader);
            //this.dataGridView1.bin
        }
        void ckBox_CheckedChanged(object sender, EventArgs e)
        {

            for (int j = 0; j < this.dataGridView1.RowCount; j++)
            {

                this.dataGridView1[0, j].Value = this.ckBox.Checked;

            }

            this.dataGridView1.EndEdit();

        }

---

see out put snashot too ..


can any one tell me how to put header text box shown in image in the column where written selected.please necessary ammendmnet in code

Do you want to replace Selected Header with a checkbox control that function as checkall?

Greg