日期:2014-5-20 浏览次数:20209次 点赞次数:20

Distinct自定义时出错了!!大家帮我看看!
public partial class _Default : System.Web.UI.Page
{
  protected void Page_Load(object sender, EventArgs e)
  {
  if (!IsPostBack)
  {
  DataClassesDataContext pa = new DataClassesDataContext();
  var sel = from p in pa.Course select p.Creator;
  GridView1.DataSource = sel.Distinct(new BusinessObjComparer()); GridView1.DataBind();
  }
  }

  public class BusinessObj
  {
  public string createtime;
  public string crsname;
  }


  public class BusinessObjComparer : IEqualityComparer<BusinessObj>
  {
  public bool Equals(BusinessObj source, BusinessObj dest)
  {
  return source.crsname == dest.crsname;
  }

  public int GetHashCode(BusinessObj obj)
  {
  return obj.crsname.GetHashCode();
  }
  }
}

这样写了,但是红色的地方出错错误了!大大们帮我看看

------解决方案--------------------
var sel = from p in pa.Course select new BusinessObj{crsname=p.crsname,createtime=p.createtime};

------解决方案--------------------
http://msdn.microsoft.com/en-us/library/bb338049.aspx
------解决方案--------------------
应该是自定义的 BusinessObjComparer 方法有问题,参考一下上面的msdn.