Question: I want to read data from one column of datagridview. My datagridview contains many columns but I want to read all cells but only from one column. I read all columns using this code:

```
foreach (DataGridViewColumn col in dataGridView1.Columns)
        col.Name.ToString();

```

But I want to read all cell from particular column.

Answer: 
Try this

```
string data = string.Empty;
int indexOfYourColumn = 0;
foreach (DataGridViewRow row in dataGridView1.Rows)
   data = row.Cells[indexOfYourColumn].Value;

```
To get the value of the clicked cell:

```
private void dataGridView1_CellClick(object sender, DataGridViewCellEventArgs e)
    {
        textBox1.Text = dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString();
    }

```