Question

我正在用C＃开发一个项目。我想分离，然后使用SMO从C＃代码附加SQL Server数据库。我可以分离数据库，但是当我想要附加它时，会发生错误：

无法打开物理文件“C：\ Program Files \ Microsoft SQL Server \ MSSQL12.MSSQLSERVER \ MSSQL \ DATA \ ghale.mdf”。操作系统错误5：“5（访问被拒绝。）”。

代码：

OpenFileDialog f = new OpenFileDialog();
f.Title = "sqlbakcup";
f.FileName = "";
f.Filter = @"SQL Backup files (*.BAK) |*.BAK|All files(*.*) |*.*";

if (f.ShowDialog() == DialogResult.OK)
{
    SqlConnection sqlconn = new SqlConnection(@"Data Source=.;Initial Catalog=master;Integrated Security=True");
    ServerConnection serverconn = new ServerConnection(sqlconn);

    Server s = new Server(serverconn);
    s.DetachDatabase("ghale", false);

    //MessageBox.Show("ok");
    SqlConnection sqlconn1 = new SqlConnection(@"Data Source=.;Initial Catalog=mydb2;Integrated Security=True");

    SqlCommand sqlcmd = new SqlCommand("ALTER DATABASE mydb2  SET SINGLE_USER with ROLLBACK IMMEDIATE " + "use master  " + "RESTORE DATABASE [mydb2] FROM  DISK = @n WITH REPLACE ", sqlconn1);
    sqlcmd.Parameters.AddWithValue("@n", f.FileName);

    sqlconn1.Open();
    sqlcmd.ExecuteNonQuery();
    sqlconn1.Close();

    SqlConnection sqlconn2 = new SqlConnection(@"Data Source=.;Initial Catalog=master;Integrated Security=True");
    ServerConnection serverconn2 = new ServerConnection(sqlconn2);

    Server s1 = new Server(serverconn2);
    s1.AttachDatabase("ghale", new StringCollection {
            @"C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\ghale.mdf",
            @"C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\ghale_log.ldf" }, AttachOptions.None);
    //MessageBox.Show("ok");
    MessageBox.Show("OK");
}

Answer 1

有几点意见：

变量sqlconn2，serverconn2和s1是不必要的，因为您可以重复使用变量s来重新附加ghale数据库
如果我注释掉将备份文件还原到mydb2的中间部分，则重新附加ghale数据库
我怀疑您正在将ghale备份文件还原到数据库mydb2，如果是，请查看数据库属性| mydb2的文件您将看到它正在使用文件ghale.mdf和ghale_log.ldf。因此，您无法重新附加ghale.mdf，因为该文件现在正由数据库mydb2使用，因此会出现“拒绝访问”错误消息。

<强>更新：我认为以下代码是您正在努力实现的目标：

OpenFileDialog f = new OpenFileDialog();
f.Title = "sqlbakcup";
f.FileName = "";
f.Filter = @"SQL Backup files (*.BAK) |*.BAK|All files(*.*) |*.*";

if (f.ShowDialog() == DialogResult.OK)
{
    using (SqlConnection sqlconn = new SqlConnection(@"Data Source=.;Initial Catalog=master;Integrated Security=True"))
    {
        ServerConnection serverconn = new ServerConnection(sqlconn);

        Server s = new Server(serverconn);
        s.DetachDatabase("ghale", false);

        SqlConnection sqlconn1 = new SqlConnection(@"Data Source=.;Initial Catalog=mydb2;Integrated Security=True");

        SqlCommand sqlcmd = new SqlCommand(
            "ALTER DATABASE [mydb2] SET SINGLE_USER with ROLLBACK IMMEDIATE use master " 
            + @"RESTORE DATABASE [mydb2] FROM DISK = @n WITH REPLACE, "
            + @"MOVE 'ghale'     TO 'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Data\mydb2.mdf', "
            + @"MOVE 'ghale_log' TO 'C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\Data\mydb2_log.ldf' "
            + @"ALTER DATABASE [mydb2] MODIFY FILE (NAME=N'ghale', NEWNAME=N'mydb2')"
            + @"ALTER DATABASE [mydb2] MODIFY FILE (NAME=N'ghale_log', NEWNAME=N'mydb2_log')",
        sqlconn1);
        sqlcmd.Parameters.AddWithValue("@n", f.FileName);

        sqlconn1.Open();
        sqlcmd.ExecuteNonQuery();
        sqlconn1.Close();

        s.AttachDatabase("ghale",
                        new StringCollection {
        @"C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\ghale.mdf",
        @"C:\Program Files\Microsoft SQL Server\MSSQL12.MSSQLSERVER\MSSQL\DATA\ghale_log.ldf" },
                        AttachOptions.None);
    }
}

我已更新mydb2数据库还原sql，以便为数据和日志使用不同的物理文件，以及重命名逻辑名称。

Answer 2

试试这个..

首先你应该找到sqlserver的服务帐号，你可以在任务管理器中看到它同时按ctrl + alt + delete;然后，你必须给予＆＃34;的读/写权限。 C：\ Murach \ SQL Server 2008 \ Databases＆＃34;到服务帐户。

在C＃中附加SQL Server数据库

2 个答案: