遍历datagrid

foreach(DataGridItem mydr in dg_browse.Items)
   {
    if(((CheckBox)(mydr.Cells[0].Controls[1])).Checked)
    {     
     mydb.asSQLString = ls_sql + mydr.Cells[1].Text + "'";
     mydt = mydb.SelectDB().Tables["MyData"];
     if(mydt.Rows.Count == 0)
     {
      continue;
     } 
   
     //写出数据
     data +="<tr>";
     foreach (DataColumn column in mydt.Columns)
     {
      //data += mydt.Rows[0][column].ToString() + ",";
      string strColumnvalue = string.Empty;
      try
      {
       strColumnvalue = Convert.ToDateTime(mydt.Rows[0][column].ToString()).ToShortDateString();
       
      }
      catch
      {
       strColumnvalue = mydt.Rows[0][column].ToString();
      }
      data += "<td>" + strColumnvalue + "</td>";
     }
     //data += "\n"; 
     data += "</tr>"; 
     li_cnt ++ ;
    }
   }