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; }