Question

我在课堂上有这个功能

    public System.Collections.IList cpv_No_Date_list()
    {
        var cpvNoDateList = (from s in context.DB.CPVs
                             select new { s.cpv_no, s.cpv_date} ).ToList();
        return cpvNoDateList;
    }

然后我调用此函数并将其作为下拉列表的源

        var Service = IOC.Get<IEntityListService>();
        var cpvNoDateSrc = Service.cpv_No_Date_list();

        cpvDrpdwn.DataSource = cpvNoDateSrc;
        cpvDrpdwn.DataBind();

函数是从表中收集精确数据，但问题是它没有正确呈现它。下拉列表中的输出如下：

{cpv_no = 5, cpv_date = 1/2/2013}
{cpv_no = 7, cpv_date = 5/2/2013}
{cpv_no = 8, cpv_date = 8/2/2013}

如何摆脱输出中的这些括号

Answer 1

您将看到匿名类的默认ToString方法

创建一个新类并覆盖ToString

public class CpvNoAndDate
{
  public int cpv_no  { get; set; }
  public DateTime cpv_date { get; set; }

  public override string ToString()
  {
    return string.Format("cpv_no = {0}, cpv_date = {1}", cpv_no, cpv_date);
  }
}

然后像这样投射到你的新课：

public System.Collections.IList cpv_No_Date_list()
    {
        var cpvNoDateList = (from s in context.DB.CPVs
                             select new CpvNoAndDate 
                             { 
                               cpv_no = s.cpv_no, 
                               cpv_date = s.cpv_date
                             }).ToList();
        return cpvNoDateList;
    }

使用linq获取表的两列时输出错误

1 个答案: