Question

首先，我对LINQ to SQL很新，所以这可能是一个愚蠢的问题，但我试图在数据库中插入一条新记录，并且我不断收到以下错误：

The client was unable to establish a connection because of an error during connection initialization process before login. Possible causes include the following:  the client tried to connect to an unsupported version of SQL Server; the server was too busy to accept new connections; or there was a resource limitation (insufficient memory or maximum allowed connections) on the server. (provider: Shared Memory Provider, error: 0 - The handle is invalid.)

我可以单步执行我的代码，看到所有数据都按照我的预期存在，但是当它到达时

db.SubmitChanges()

在下面的方法中我得到了错误。我究竟做错了什么？这太令人沮丧了，我已经失去了一天试图弄清楚LINQ to SQL ...我只想把它包起来然后回到使用ADO.NET和存储过程。

public static void Save(Customer customerToSave)
    {
        IpmDatabaseDataContext db = new IpmDatabaseDataContext();
        db.Customers.InsertOnSubmit(customerToSave);

        // commit the changes to the db
        db.SubmitChanges();     
    }

在我的app.config中，它有这个连接字符串：

<connectionStrings>
    <add name="IPM.Business.Properties.Settings.IPMConnectionString"
        connectionString="Data Source=socrates\sqlexpress;Initial Catalog=IPM;Integrated Security=True"
        providerName="System.Data.SqlClient" />
</connectionStrings>

我仍然在我的开发机器上，所以这是正确的连接字符串。

Answer 1

您传递给IpmDatabaseDataContext的连接字符串是什么？您获得的错误与LINQtoSQL无关，这是数据库连接问题。

要调试此问题，请尝试将连接字符串显式传递给DataContext构造函数，例如：

IpmDatabaseDataContext db = new IpmDatabaseDataContext(
    @"Data Source=localhost\SQLEXPRESS;Integrated Security=true");

以下帖子表明共享内存提供程序...句柄无效错误将在重新启动 Windows时消失：

ASP.NET MVC : Using the same database for Entity Framework and ASP.NET Membership

A transport-level error has occurred when receiving results from the server

LINQ to SQL SubmitChanges（）无法插入新记录

1 个答案: