You need to loop through the rows in the datagridview and then compare values of columns 7 and 10 on each row. Try this: foreach (DataGridViewRow row in vendorsDataGridView.Rows) if (Convert.ToInt32(row.Cells[7].Value) < Convert.ToInt32(row.Cells[10].Value)) { row.DefaultCellStyle.BackColor = Color.Red; }
You can do: DataGridViewRow row = (DataGridViewRow)yourDataGridView.Rows[0].Clone(); row.Cells[0].Value = “XYZ”; row.Cells[1].Value = 50.2; yourDataGridView.Rows.Add(row); or: DataGridViewRow row = (DataGridViewRow)yourDataGridView.Rows[0].Clone(); row.Cells[“Column2”].Value = “XYZ”; row.Cells[“Column6”].Value = 50.2; yourDataGridView.Rows.Add(row); Another way: this.dataGridView1.Rows.Add(“five”, “six”, “seven”,”eight”); this.dataGridView1.Rows.Insert(0, “one”, “two”, “three”, “four”); From: http://msdn.microsoft.com/en-us/library/system.windows.forms.datagridview.rows.aspx
I just spent an hour on a similar problem. For me the answer turned out to be embarrassingly simple. (dataGridViewFields.DataSource as DataTable).DefaultView.RowFilter = string.Format(“Field = ‘{0}'”, textBoxFilter.Text);
Of course the programming languge isnt wrong. Its reporting to you that you are tring to use an object reference which is in fact null. In the section dgvSelected.Rows[i].Cells[3].Value.ToString() one of the following is null dgvSelected dgvSelected.Rows dgvSelected.Rows[i] dgvSelected.Rows[i].Cells dgvSelected.Rows[i].Cells[3] dgvSelected.Rows[i].Cells[3].Value As you can see, you should be doing alot of checking to make sure … Read more