方法一：
1.如果附加數據庫時，沒有指定邏輯名，則在SQL2005上顯示爲“全路徑，且爲大寫”。比如，數據庫文件D:MyTest.mdf和D:MyTest.ldf，附加到SQL服務器上時，如果沒有指定邏輯名，則在SQL2005上顯示爲“D:MYTEST.MDF”。此時，C#的連接字符串爲“DataSource=dsName;AttatchDBFilename=”D:/MyTest.mdf”;User ID=id;Password=pw”；
2.如果附加數據庫時，指定了邏輯名，則在SQL2005上顯示爲“邏輯名”，此時，C#的連接字符串爲“DataSource=dsName;AttatchDBFilename=”D:/MyTest.mdf”;Initial Catalog=aa_LogicName;User ID=id;Password=pw”；
3.被附加的數據庫名稱不可隨意更改；否則容易出現錯誤。
方法二：
string DbPath=System.Environment.CurrentDirectory +@"/Demo_Data.MDF";
string LogPath=System.Environment.CurrentDirectory +@"/Demo_Log.LDF";
string StrSql="exec sp_attach_db @dbname='supmark',@filename1='"+DbPath+"',@filename2='"+LogPath+"'";
string strcon="Server=(local);Integrated Security=SSPI;Database=master";
SqlConnection cn=new SqlConnection(strcon);
SqlCommand cmd =new SqlCommand (StrSql,cn);
cn.Open();
cmd.ExecuteNonQuery();
cn.Close();
方法三詳細代碼：
using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Data.SqlClient;
using System.Data;
using System.ServiceProcess;
namespace AdminZJC.DataBaseControl
{
/// <summary>
/// 數據庫操作控制類
/// </summary>
public class DataBaseControl
{
/// <summary>
/// 數據庫連接字符串
/// </summary>
public string ConnectionString;
/// <summary>
/// SQL操作語句/存儲過程
/// </summary>
public string StrSQL;
/// <summary>
/// 實例化一個數據庫連接對象
/// </summary>
private SqlConnection Conn;
/// <summary>
/// 實例化一個新的數據庫操作對象Comm
/// </summary>
private SqlCommand Comm;
/// <summary>
/// 要操作的數據庫名稱
/// </summary>
public string DataBaseName;
/// <summary>
/// 數據庫文件完整地址
/// </summary>
public string DataBase_MDF;
/// <summary>
/// 數據庫日誌文件完整地址
/// </summary>
public string DataBase_LDF;
/// <summary>
/// 備份文件名
/// </summary>
public string DataBaseOfBackupName;
/// <summary>
/// 備份文件路徑
/// </summary>
public string DataBaseOfBackupPath;
/// <summary>
/// 執行創建/修改數據庫和表的操作
/// </summary>
public void DataBaseAndTableControl()
{
try
{
Conn = new SqlConnection(ConnectionString);
Conn.Open();
Comm = new SqlCommand();
Comm.Connection = Conn;
Comm.CommandText = StrSQL;
Comm.CommandType = CommandType.Text;
Comm.ExecuteNonQuery();
MessageBox.Show("數據庫操作成功！", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
Conn.Close();
}
}
/// <summary>
/// 附加數據庫
/// </summary>
public void AddDataBase()
{
try
{
Conn = new SqlConnection(ConnectionString);
Conn.Open();
Comm = new SqlCommand();
Comm.Connection = Conn;
Comm.CommandText = "sp_attach_db";
Comm.Parameters.Add(new SqlParameter(@"dbname", SqlDbType.NVarChar));
Comm.Parameters[@"dbname"].Value = DataBaseName;
Comm.Parameters.Add(new SqlParameter(@"filename1", SqlDbType.NVarChar));
Comm.Parameters[@"filename1"].Value = DataBase_MDF;
Comm.Parameters.Add(new SqlParameter(@"filename2", SqlDbType.NVarChar));
Comm.Parameters[@"filename2"].Value = DataBase_LDF;
Comm.CommandType = CommandType.StoredProcedure;
Comm.ExecuteNonQuery();
MessageBox.Show("附加數據庫成功", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
Conn.Close();
}
}
/// <summary>
/// 分離數據庫
/// </summary>
public void DeleteDataBase()
{
try
{
Conn = new SqlConnection(ConnectionString);
Conn.Open();
Comm = new SqlCommand();
Comm.Connection = Conn;
Comm.CommandText = @"sp_detach_db";
Comm.Parameters.Add(new SqlParameter(@"dbname", SqlDbType.NVarChar));
Comm.Parameters[@"dbname"].Value = DataBaseName;
Comm.CommandType = CommandType.StoredProcedure;
Comm.ExecuteNonQuery();
MessageBox.Show("分離數據庫成功", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
Conn.Close();
}
}
/// <summary>
/// 備份數據庫
/// </summary>
public void BackupDataBase()
{
try
{
Conn = new SqlConnection(ConnectionString);
Conn.Open();
Comm = new SqlCommand();
Comm.Connection = Conn;
Comm.CommandText = "use master;backup database @dbname to disk = @backupname;";
Comm.Parameters.Add(new SqlParameter(@"dbname", SqlDbType.NVarChar));
Comm.Parameters[@"dbname"].Value = DataBaseName;
Comm.Parameters.Add(new SqlParameter(@"backupname", SqlDbType.NVarChar));
Comm.Parameters[@"backupname"].Value = @DataBaseOfBackupPath + @DataBaseOfBackupName;
Comm.CommandType = CommandType.Text;
Comm.ExecuteNonQuery();
MessageBox.Show("備份數據庫成功", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
Conn.Close();
}
}
/// <summary>
/// 還原數據庫
/// </summary>
public void ReplaceDataBase()
{
try
{
string BackupFile = @DataBaseOfBackupPath + @DataBaseOfBackupName;
Conn = new SqlConnection(ConnectionString);
Conn.Open();
Comm = new SqlCommand();
Comm.Connection = Conn;
Comm.CommandText = "use master;restore database @DataBaseName From disk = @BackupFile with replace;";
Comm.Parameters.Add(new SqlParameter(@"DataBaseName", SqlDbType.NVarChar));
Comm.Parameters[@"DataBaseName"].Value = DataBaseName;
Comm.Parameters.Add(new SqlParameter(@"BackupFile", SqlDbType.NVarChar));
Comm.Parameters[@"BackupFile"].Value = BackupFile;
Comm.CommandType = CommandType.Text;
Comm.ExecuteNonQuery();
MessageBox.Show("還原數據庫成功", "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "信息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
Conn.Close();
}
}
}
}
/*
///調用事例：
還原數據庫
private void button0_Click(object sender, EventArgs e)
{
DataBaseControl DBC = new DataBaseControl();
DBC.ConnectionString = "Data Source=(local);User id=sa;Password=123456; Initial Catalog=master";
DBC.DataBaseName = "MyDatabase";
DBC.DataBaseOfBackupName = @"back.bak";
DBC.DataBaseOfBackupPath = @"D:/Program Files/Microsoft SQL Server/MSSQL/Data/";
DBC.ReplaceDataBase();
}
附加數據庫
private void button1_Click_1(object sender, EventArgs e)
{
DataBaseControl DBC = new DataBaseControl();
DBC.ConnectionString = "Data Source=(local);User id=sa;Password=123456; Initial Catalog=master";
DBC.DataBaseName = "MyDatabase";
DBC.DataBase_MDF = @"D:/Program Files/Microsoft SQL Server/MSSQL/Data/MyDatabase_Data.MDF";
DBC.DataBase_LDF = @"D:/Program Files/Microsoft SQL Server/MSSQL/Data/MyDatabase_Log.LDF";
DBC.AddDataBase();
}
備份數據庫
private void button2_Click(object sender, EventArgs e)
{
DataBaseControl DBC = new DataBaseControl();
DBC.ConnectionString = "Data Source=(local);User id=sa;Password=123456; Initial Catalog=master";
DBC.DataBaseName = "MyDatabase";
DBC.DataBaseOfBackupName = @"back.bak";
DBC.DataBaseOfBackupPath = @"D:/Program Files/Microsoft SQL Server/MSSQL/Data/";
DBC.BackupDataBase();
}
分離數據庫
private void button3_Click(object sender, EventArgs e)
{
DataBaseControl DBC = new DataBaseControl();
DBC.ConnectionString = "Data Source=(local);User id=sa;Password=123456; Initial Catalog=master";
DBC.DataBaseName = "MyDatabase";
DBC.DeleteDataBase();
}
