/// <summary>
/// 给model类自动赋值
/// </summary>
/// <param name="sqlstring">获取查询一个model实例的sql语句</param>
/// <param name="obj">model实例对象</param>
/// <returns></returns>
public object selmodel(string sqlstring,object obj)
{
  DataTable dtsell = lcommonbll.GetTable(sqlstring);
  int count = dtsell.Rows.Count;
  if (count == 0)
  {
   return null;
  }
  else
  {
   DataRow dr = dtsell.Rows[0];
   #region 另一种方法
   //foreach (DataColumn col in dr.Table.Columns)
   //{
   // PropertyInfo pt = seller.GetType().GetProperty(col.ColumnName);
   // if (String.IsNullOrEmpty(dr[col.ColumnName].ToString()))
   // {
   //  break;
   // }
   // else
   // {
   //  pt.SetValue(seller, dtsell.Rows[0][0], null);
   // }
   //}
   #endregion
   foreach (System.Reflection.PropertyInfo pi in obj.GetType().GetProperties())
   {
    if (pi.CanWrite)
    {
     try
     {
      if (dtsell.Rows[0][pi.Name]!=null)
      {
       pi.SetValue(obj, dtsell.Rows[0][pi.Name], null);
      }
      else
      {
       pi.SetValue(obj, null, null);
      }
     }
     catch
     {
      pi.SetValue(obj, null, null);
     }
    }
   }
   return obj;
  }
}

Seller seller = new Seller();//实体类
bind BIND = new bind();//绑定方法类
seller = (Seller)BIND.selmodel("select * from seller where SID=2", seller);//赋值