独特的在LINQ不工作 | 独特的在LINQ不工作

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问题描述

嗨
我想为以下查询获取不同的EmployeeId.我使用了Distinct，但无法正常使用

Hi
i want to get the distinct EmployeeId for the following query. I used Distinct but its not working

var emp= (from dr in dt.AsEnumerable() orderby dr["EmployeeID"] descending
         select new Employee(){
EmployeeId = int.Parse(dr"EmployeeID"].ToString()),
EmployeeName = dr["EmployeeName"].ToString(),
EmployeeDesignation = dr["EmployeeDesignation"].ToString()
         }).Distinct();

推荐答案

var emp= (from dr in dt.AsEnumerable() orderby dr["EmployeeID"] descending
         select new Employee(){
EmployeeId = int.Parse(dr"EmployeeID"].ToString()),
EmployeeName = dr["EmployeeName"].ToString(),
EmployeeDesignation = dr["EmployeeDesignation"].ToString()
         })Distinct();

成为:

var emp= (from dr in dt.AsEnumerable() orderby dr["EmployeeID"] descending
         select new Employee(){
EmployeeId = int.Parse(dr"EmployeeID"].ToString()),
EmployeeName = dr["EmployeeName"].ToString(),
EmployeeDesignation = dr["EmployeeDesignation"].ToString()
         }).Distinct();

var emp= (from dr in dt.AsEnumerable() orderby dr["EmployeeID"] descending
         select new Employee(){
EmployeeId = int.Parse(dr"EmployeeID"].ToString()),
EmployeeName = dr["EmployeeName"].ToString(),
EmployeeDesignation = dr["EmployeeDesignation"].ToString()
         }).Distinct();

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