CSHARP

switch rows and columns in a datagridview

DataTable oldTable = new DataTable();

...

DataTable newTable = new DataTable();

newTable.Columns.Add("Field Name");
for (int i = 0; i < oldTable.Rows.Count; i++)
    newTable.Columns.Add();

for (int i = 0; i < oldTable.Columns.Count; i++)
{
    DataRow newRow = newTable.NewRow();

    newRow[0] = oldTable.Columns[i].Caption;
    for (int j = 0; j < oldTable.Rows.Count; j++)
        newRow[j+1] = oldTable.Rows[j][i];
    newTable.Rows.Add(newRow);
}

dataGridView.DataSource = newTable;