linq to sql-遍历表数据和设置值 [英] linq to sql - loop through table data and set value

问题描述

我有一个表"Users". 它有一列"ShowData"

I have a table "Users".. it has a column "ShowData"

如何使用linq-sql遍历每个用户并将每个用户的ShowData设置为false.

using linq-sql how can I loop through every user and set ShowData to false for each user..

谢谢

推荐答案

创建一个linq to sql classes设计器文件.然后将用户"表放到设计器图面上.

Create a linq to sql classes designer file. Then drop the Users table on to the designer surface.

using (TheDataContext dc = new TheDataContext)
{
  //pull all users into memory, not recommended for large tables.
  List<User> users = dc.Users.ToList();

  foreach(User theUser in users)
  {
    theUser.ShowData = false;
  }
  //send all these property changes back to the database.
  dc.SubmitChanges();
}

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为了防止自己投票不足:

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And to guard myself against downvoting:

using (TheDataContext dc = new TheDataContext())
{
  dc.ExecuteCommand("UPDATE Users SET ShowData = 0");
}

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