C# 该行已经属于另一个表

 1             DataTable dtSource = (DataTable)this.gridControl1.DataSource;
 2             DataRow[] dr = dtSource.Select("checked=‘1‘");
 3             DataTable dt = new DataTable();
 4 
 5             if (dr.Length>0)
 6             {
 7                 dt.Columns.Add("checked", typeof(string));
 8                 dt.Columns.Add("ExcelColumn", typeof(string));
 9                 dt.Columns.Add("refCode", typeof(string));
10 
11                 for (int i = 0; i < dr.Length; i++)
12                 {
13                     dt.Rows.Add(dr[i]);
14                 }
15             }
16             else
17             {
18                 MessageBox.Show("未勾选要操作的数据！");
19                 return;
20             }