How to check empty and null cells in datagridview using C#

Question

i am trying to check the datagridview cells for empty and null value... but i can not do it right...

for (int i = 0; i < dataGridView1.Rows.Count; i++)
{
         


        

Answer 1

I think you should use this:

for (int i = 0; i < dataGridView1.RowCount; i++)
{
    for (int j = 0; j < dataGridView1.ColumnCount; j++) 
    {
        if (dataGridView1.Rows[i].Cells[j].Value == DBNull.Value)
        {
            dataGridView1.Rows[i].Cells[j].Value = "null";
        }
    }
}
dataGridView1.Update();

Answer 2

Works perfect for me:

for (int i = dataGridView1.Rows.Count - 1; i >= 0; i--)
{
    DataGridViewRow dataGridViewRow = dataGridView1.Rows[i];

    foreach (DataGridViewCell cell in dataGridViewRow.Cells)
    {
        string val = cell.Value as string;
        if (string.IsNullOrEmpty(val))
        {
            if (string.IsNullOrEmpty(dataGridView1.Rows[i].Cells[3].Value as string)) // If you want to check more then just one cell you could also add "&& (string.IsNullOrEmpty(dataGridView1.Rows[i].Cells[ANY NUMBER].Value as string)
            {
                MessageBox.Show(" cell is empty");
                return;
                /* or to delete replace with:
                dataGridView1.Rows.Remove(dataGridViewRow);
                break;
                */
            }
        }
    }
}