[英]Retrieve single data from a database with Linq-to-SQL
I have a table that looks like this. 我有一张看起来像这样的桌子。
CREATE TABLE [dbo].[loginInfos]
(
[loginId] INT IDENTITY (1, 1) NOT NULL,
[username] VARCHAR (50) NULL,
[password] VARCHAR (50) NULL,
PRIMARY KEY CLUSTERED ([loginId] ASC)
);
I want to get the username and compare it with a input from a textbox. 我想获取用户名并将其与文本框中的输入进行比较。 It will really be a huge help. 这确实是一个巨大的帮助。
var MyDb = new MyDb ("c:\\Data\\MyDb .mdf");
var user = =
(from u in MyDb.loginInfos
where u.username== txtUsername.Text
select u).SingleOrDefault();
// user.username
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