Auto Addition of Number in Windows Form

Hi,
You can try like this

this.dataGridView1.CellEndEdit += new System.Windows.Forms.DataGridViewCellEventHandler(this.dataGridView1_CellEndEdit);

private void dataGridView1_CellEndEdit(object sender, DataGridViewCellEventArgs e)

{

int total = 0;

var teMark = dataGridView1.Rows[e.RowIndex].Cells[1].Value.ToString();

if (teMark != string.Empty)

{

total = total + Convert.ToInt32(teMark);

}

var ceMark = dataGridView1.Rows[e.RowIndex].Cells[2].Value.ToString();

if (ceMark != string.Empty)

{

total = total + Convert.ToInt32(ceMark);

}

var peMark = dataGridView1.Rows[e.RowIndex].Cells[3].Value.ToString();

if (peMark != string.Empty)

{

total = total + Convert.ToInt32(peMark);

}

dataGridView1.Rows[e.RowIndex].Cells[4].Value = total;

}

Regards,
Iftikar