C#2010 Express和#x2B；SQL Server 2008 Express-连接“；“登录失败”；

实际上，我正在用Visual C#Express 2010开发一个Windows窗体应用程序，它将使用SQL Server 2008 Express数据库中的（读/写）数据

我已使用SQL Server Management Studio（2008 Express）创建了数据库， 我知道该实例名为

ATLELAG786576\SQLEXPRESS

我的数据库称为“测试”

查看SQL Server Management Studio（2008 Express）中我的数据库“测试”属性： 在文件下，我是数据库的所有者（

ATLE\bnevux

）

在安全、登录、Mylogin（ATLE\bNevUX）下查找

• 我的默认数据库是“TEST”
• 服务器角色为“public”+“sysadmin”
• 用户映射数据库'TEST'用户'dbo'默认架构'dbo'

在我的C#应用程序中

app.config:

<?xml version="1.0" encoding="utf-8" ?> <configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="connectionStringTestDb"
            connectionString="Data Source=ATLELAG786576\SQLEXPRESS;Initial Catalog=D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\TEST.mdf;Integrated Security=True;Connect Timeout=30;User Instance=False"
            providerName="System.Data.SqlClient" />
    </connectionStrings> </configuration>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace SQLServerConnectionDemo
{
    class dbConnection
    {
        public static SqlConnection newCon;
        public static string connectionStringTestDb = ConfigurationManager.ConnectionStrings["connectionStringTestDb"].ConnectionString;

        public static SqlConnection GetConnection()
        {
            newCon = new SqlConnection(connectionStringTestDb);
            return newCon;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace SQLServerConnectionDemo
{
    class dbAccess
    {
        SqlConnection conn;
        public dbAccess()
        {
            conn = dbConnection.GetConnection();
        }

        //Method insert new in tblEmployees
        public void addEmployee(string Id, string Name, string Email)
        {
            if (conn.State.ToString() == "Closed")
            {
                conn.Open();
            }
            SqlCommand newCmd = conn.CreateCommand();
            newCmd.Connection = conn;
            newCmd.CommandType = CommandType.Text;
            newCmd.CommandText = "INSERT INTO tblEmployees VALUES ('"+ Id +"','"+ Name +"','"+ Email +"')";
            newCmd.ExecuteNonQuery();
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace SQLServerConnectionDemo
{
    public partial class formEmployeeAdd : Form
    {

        dbAccess access = new dbAccess();

        public formEmployeeAdd()
        {
            InitializeComponent();
        }

        private void btnInsert_Click(object sender, EventArgs e)
        {
            access.addEmployee(txtId.Text, txtName.Text, txtEmail.Text);
            MessageBox.Show("Data successfully added");
        }
    }
}

dbAccess.cs:

<?xml version="1.0" encoding="utf-8" ?> <configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="connectionStringTestDb"
            connectionString="Data Source=ATLELAG786576\SQLEXPRESS;Initial Catalog=D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\TEST.mdf;Integrated Security=True;Connect Timeout=30;User Instance=False"
            providerName="System.Data.SqlClient" />
    </connectionStrings> </configuration>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace SQLServerConnectionDemo
{
    class dbConnection
    {
        public static SqlConnection newCon;
        public static string connectionStringTestDb = ConfigurationManager.ConnectionStrings["connectionStringTestDb"].ConnectionString;

        public static SqlConnection GetConnection()
        {
            newCon = new SqlConnection(connectionStringTestDb);
            return newCon;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace SQLServerConnectionDemo
{
    class dbAccess
    {
        SqlConnection conn;
        public dbAccess()
        {
            conn = dbConnection.GetConnection();
        }

        //Method insert new in tblEmployees
        public void addEmployee(string Id, string Name, string Email)
        {
            if (conn.State.ToString() == "Closed")
            {
                conn.Open();
            }
            SqlCommand newCmd = conn.CreateCommand();
            newCmd.Connection = conn;
            newCmd.CommandType = CommandType.Text;
            newCmd.CommandText = "INSERT INTO tblEmployees VALUES ('"+ Id +"','"+ Name +"','"+ Email +"')";
            newCmd.ExecuteNonQuery();
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace SQLServerConnectionDemo
{
    public partial class formEmployeeAdd : Form
    {

        dbAccess access = new dbAccess();

        public formEmployeeAdd()
        {
            InitializeComponent();
        }

        private void btnInsert_Click(object sender, EventArgs e)
        {
            access.addEmployee(txtId.Text, txtName.Text, txtEmail.Text);
            MessageBox.Show("Data successfully added");
        }
    }
}

格式为employeeAdd.cs:

<?xml version="1.0" encoding="utf-8" ?> <configuration>
    <configSections>
    </configSections>
    <connectionStrings>
        <add name="connectionStringTestDb"
            connectionString="Data Source=ATLELAG786576\SQLEXPRESS;Initial Catalog=D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\TEST.mdf;Integrated Security=True;Connect Timeout=30;User Instance=False"
            providerName="System.Data.SqlClient" />
    </connectionStrings> </configuration>

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;

namespace SQLServerConnectionDemo
{
    class dbConnection
    {
        public static SqlConnection newCon;
        public static string connectionStringTestDb = ConfigurationManager.ConnectionStrings["connectionStringTestDb"].ConnectionString;

        public static SqlConnection GetConnection()
        {
            newCon = new SqlConnection(connectionStringTestDb);
            return newCon;
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.SqlClient;

namespace SQLServerConnectionDemo
{
    class dbAccess
    {
        SqlConnection conn;
        public dbAccess()
        {
            conn = dbConnection.GetConnection();
        }

        //Method insert new in tblEmployees
        public void addEmployee(string Id, string Name, string Email)
        {
            if (conn.State.ToString() == "Closed")
            {
                conn.Open();
            }
            SqlCommand newCmd = conn.CreateCommand();
            newCmd.Connection = conn;
            newCmd.CommandType = CommandType.Text;
            newCmd.CommandText = "INSERT INTO tblEmployees VALUES ('"+ Id +"','"+ Name +"','"+ Email +"')";
            newCmd.ExecuteNonQuery();
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace SQLServerConnectionDemo
{
    public partial class formEmployeeAdd : Form
    {

        dbAccess access = new dbAccess();

        public formEmployeeAdd()
        {
            InitializeComponent();
        }

        private void btnInsert_Click(object sender, EventArgs e)
        {
            access.addEmployee(txtId.Text, txtName.Text, txtEmail.Text);
            MessageBox.Show("Data successfully added");
        }
    }
}

下面是我在尝试运行此进程时始终收到的错误消息：

System.Data.SqlClient.SqlException（0x80131904）：无法打开登录请求的数据库“D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\Data\TEST.mdf”。登录失败。 用户“ATLE\bNevUX”登录失败

请注意，我从未真正能够在Visual C#2010 Express中添加我的数据源，因此我可以从VS中管理数据库，我总是收到以下错误消息：

无法打开物理文件“D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\TEST.mdf”。操作系统错误32：“32（Pout-Pas-AcE.E.C.A.） 尝试为文件D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\TEST.mdf附加自动命名数据库失败。存在同名数据库，或无法打开指定的文件，或该文件位于UNC共享上

试着替换

Initial Catalog=D:\Microsoft SQL Server\MSSQL10.SQLEXPRESS\MSSQL\DATA\TEST.mdf

简单地

Initial Catalog=TEST

---

嗨，jeroenh，刚刚尝试了你的建议，它奏效了，解决了我的问题！谢谢你的快速回复！（我如何将此答案标记为成功？）很高兴它有效。问题的左边应该有一个“接受”标记。您也可以使用向上箭头进行向上投票。jeroenh，我可以滥用并询问您如何解决使用Visual C#2010 Express浏览/管理数据库的可能性；当我进入数据源>新建>数据库>数据集>新建连接时，我选择“数据源”Microsoft SQL Server文件。。。（很抱歉，如果翻译不正确，我使用的是法语版本）然后在单击“测试连接”时浏览到我的TEST.mdf文件，我现在收到以下错误消息“无法打开用户默认数据库。登录失败。用户“ATLE\bNevux”登录失败。谢谢！Briceno不能完全确定VS Express，但您不需要浏览到.mdf文件。您需要输入SQL server名称（COMPUTER\INSTANCE），并连接到数据库名称（“TEST”），VS Express明确要求我指向.mdf文件。我按照您的建议做了+将“初始目录”属性更改为我的Db名称，并且成功了；）谢谢你的帮助。祝你有一个愉快的一天