使用linq查询datatable会返回以下错误:CS0117:'DataSet1.map DataTable""不包含"AsEnumerable"的定义
项目包括系统的参考.数据Datasetextensions.
这是密码.
using System;
using System.Collections;
using System.ComponentModel;
using System.Configuration;
using System.Reflection;
using System.Data;
using System.Linq;
using System.Data.Linq;
using System.Data.Common;
using System.Data.DataSetExtensions;
using System.Linq.Expressions;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
protected void Page_Load(object sender, EventArgs e)
{
var query1 = from mfg_nm in DataSet1.mapDataTable.AsEnumerable()
select mfg_nm;
}
使用AsEnumerable()运行它会导致
var query1 = from mfg_nm in DataSet1.mapDataTable
select mfg_nm;
CS1660:无法将lambda表达式转换为类型"string",因为它不是委托类型
提前感谢你的帮助