header checkbox in datagrid view

[ERUM]

hi to all

I have follwoing code in desktop application ..

 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

[KGComputers]

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

Greg