将DataGridView转换为DataTable

如已绑定过数据源：

DataTable dt = (dataGridView1.DataSource as DataTable)

 

 

如未绑定过数据源：

　　　　 public DataTable GetDgvToTable(DataGridView dgv)        {            DataTable dt = new DataTable();            // 列强制转换            for (int count = 0; count < dgv.Columns.Count; count++)            {                DataColumn dc = new DataColumn(dgv.Columns[count].Name.ToString());                dt.Columns.Add(dc);            }            // 循环行            for (int count = 0; count < dgv.Rows.Count; count++)            {                DataRow dr = dt.NewRow();                for (int countsub = 0; countsub < dgv.Columns.Count; countsub++)                {                    dr[countsub] = Convert.ToString(dgv.Rows[count].Cells[countsub].Value);                }                dt.Rows.Add(dr);            }            return dt;        }