本文介绍了从ADO转换为实体框架的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

我需要将这段代码更改为实体框架



I need to change this piece of code to entity framework

string getQuerystring = queueListBox.Text.Substring(0, 4).Replace(" ", string.Empty);
queryString = "Select * from reservation where Id= '" + getQuerystring + "'";

query = new SqlCommand(queryString, connection);





我尝试过:



尝试将此更改为实体框架



What I have tried:

try to change this to entity framework

推荐答案

var result = myDbContext.Reservations.SingleOrDefault(r => r.Id == queryId);






or

var result = myDbContext.Reservations.Where(r => r.Id == queryId).SingleOrDefault();






or

var result = from r in myDbContext.Reservations
             where r.Id == queryId
             select r;


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09-13 10:46