无法将方法组分配给 asp.net、linq、c# 中的隐式类型局部变量答案

【问题标题】：Cannot assign method group to an implicitly-typed local variable in asp.net,linq,c#无法将方法组分配给 asp.net、linq、c# 中的隐式类型局部变量
【发布时间】：2014-04-25 10:20:20
【问题描述】：

public void selectqueryasso()
    {
        CustomerOrderResult cso=new CustomerOrderResult();
        var a = (from as1 in ds.orders
                   from as2 in ds.order_details
                   where (as1.oid == as2.oid)
                   orderby as1.pname
                   select new CustomerOrderResult 
                   {
                      oid = Convert.ToInt32(as1.oid),
                      cmny =as1.cmny,
                      ocountry=as1.ocountry,
                      pname=as1.pname,
                      price= Convert.ToString(as1.price),
                      orderno= Convert.ToString(as1.orderno),
                      saltitle=as1.saltitle
                   }).ToList<CustomerOrderResult>;

        GridView1.DataSource = a;
        GridView1.DataBind();
    }

无法将方法组分配给隐式类型的局部变量无法将方法组分配给隐式类型的局部变量无法将方法组分配给隐式类型的局部变量

【问题讨论】：

标签： c# asp.net linq linq-to-sql

【解决方案1】：

您实际上并没有调用ToList() 方法，您缺少那里的括号：

public void selectqueryasso()
{
    CustomerOrderResult cso=new CustomerOrderResult();
    var a = (from as1 in ds.orders
               from as2 in ds.order_details
               where (as1.oid == as2.oid)
               orderby as1.pname
               select new CustomerOrderResult 
               {
                  oid = Convert.ToInt32(as1.oid),
                  cmny =as1.cmny,
                  ocountry=as1.ocountry,
                  pname=as1.pname,
                  price= Convert.ToString(as1.price),
                  orderno= Convert.ToString(as1.orderno),
                  saltitle=as1.saltitle
               }).ToList<CustomerOrderResult>();

    GridView1.DataSource = a;
    GridView1.DataBind();
}

【讨论】：