SQL Server備份和還原

Question

備用

string connectionString1 = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|Database1.mdf;Database=Database1;Integrated Security=True; User Instance=True");
            SqlConnection cn = new SqlConnection(connectionString1);
            cn.Open();
            SqlCommand cmd = new SqlCommand();
            SqlDataReader reader;
            cmd.CommandText = @"BACKUP DATABASE Database1 TO DISK = 'C:\SRI2Works.bak'";

            cmd.CommandType = CommandType.Text;
            cmd.Connection = cn;
            reader = cmd.ExecuteReader();
            cn.Close();
            MessageBox.Show("Database Backup Successfull.");

恢復

string connectionString1 = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|Database1.mdf;Database=Database1;Integrated Security=True; User Instance=True");
            SqlConnection cn = new SqlConnection(connectionString1);
            cn.Open();

            SqlCommand cmd = new SqlCommand();
            SqlDataReader reader;
            cmd.CommandText = @"use master; RESTORE DATABASE Database1 FROM DISK = 'C:\SRI2Works.bak'";
            cmd.CommandText = "DBCC CHECKDB ('Database1')";
            cmd.CommandType = CommandType.Text;
            cmd.Connection = cn;
            reader = cmd.ExecuteReader();
            cn.Close();
            MessageBox.Show("Database Restored Successfull.");

此代碼成功運行，但不進行任何更改。

Answer 1

在還原數據庫中嘗試此代碼：

    private void restoreButton_Click(object sender, EventArgs e)
    {
    string database = con.Database.ToString();
    if (con.State != ConnectionState.Open)
    {
        con.Open();
    }
    try
    {
        string sqlStmt2 = string.Format("ALTER DATABASE [" + database + "] SET SINGLE_USER WITH ROLLBACK IMMEDIATE");
        SqlCommand bu2 = new SqlCommand(sqlStmt2, con);
        bu2.ExecuteNonQuery();

        string sqlStmt3 = "USE MASTER RESTORE DATABASE [" + database + "] FROM DISK='" + textBox2.Text + "'WITH REPLACE;";
        SqlCommand bu3 = new SqlCommand(sqlStmt3, con);
        bu3.ExecuteNonQuery();

        string sqlStmt4 = string.Format("ALTER DATABASE [" + database + "] SET MULTI_USER");
        SqlCommand bu4 = new SqlCommand(sqlStmt4, con);
        bu4.ExecuteNonQuery();

        MessageBox.Show("database restoration done successefully");
        con.Close();

   }
   catch (Exception ex)
   {
        MessageBox.Show(ex.ToString());
   }
}

有關更多說明，請查看本教程： 使用C＃備份和還原Sql Server數據庫

Answer 2

例如我們有2個菜單條; 一個用於備份，另一個用於恢復，因此它們執行方法！ 試試這個 ：

    private void saveDatabaseToolStripMenuItem_Click(object sender, EventArgs e)
    {
        try
        {
            BackupDatabase();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message + " \nPlease choose the folder Sauvegardes to backup !");
        }

    }
    private void restoreDatabaseToolStripMenuItem_Click(object sender, EventArgs e)
    {
        try
        {
            RestoreDatabase();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
    }
    private void BackupDatabase()
    {
        saveFileDialogBackUp.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory + @"Sauvegardes";
        if (saveFileDialogBackUp.ShowDialog() == DialogResult.OK)
        {
            Con.ExecuteCmd("BACKUP DATABASE MyFooDatabase TO DISK = '" + saveFileDialogBackUp.FileName + "'");
            MessageBox.Show("Success , done!", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
    }
    private void RestoreDatabase()
    {
        openFileDialogBackUp.InitialDirectory = AppDomain.CurrentDomain.BaseDirectory + @"Sauvegardes";
        if (openFileDialogBackUp.ShowDialog() == DialogResult.OK)
        {
            Con.ExecuteCmd(" USE MASTER RESTORE DATABASE MyFooDatabase FROM DISK = '"+openFileDialogBackUp.FileName+"' WITH REPLACE");
            MessageBox.Show("Database Restored", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

    }

Answer 3

從代碼中刪除以下語句：

cmd.CommandText = "DBCC CHECKDB ('Database1')";

如果要覆蓋現有數據庫，請對命令文本使用以下命令：

cmd.CommandText = @"use master; RESTORE DATABASE Database1 FROM DISK = 'C:\SRI2Works.bak' WITH REPLACE";

Answer 4

RESTORE DATABASE [C] FROM DISK = 'D:\\Inventory.bak' WITH RECOVERY, 
MOVE 'Inventory_Data'
 TO 'C:\\Program Files\\Microsoft SQL Server\\MSSQL\\Data\\c_Data.MDF', 
MOVE 'Inventory_Log' 
TO 
'C:\\Program Files\\Microsoft SQL Server\\MSSQL\\Data\\c_Log.LDF', 
REPLACE, stats =1

您唯一需要關心的是，在MS SQL SERVER中不會創建還原數據庫。 在我查詢運行后的情況下，它應該創建一個名為[C]的新數據庫，並在[C:\\\\Program Files\\\\Microsoft SQL Server\\\\MSSQL\\\\Data\\\\]路徑創建其文件