实例介绍
【实例简介】数据库还原、备份、附加功能实例
【实例截图】
【核心代码】
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
#region 定义全局变量
private static string strServer = ""; //SQL服务器
private static string strUID = ""; //登录用户
private static string strPwd = ""; //登录密码
private static string strDatabase = "";//要执行操作的数据库名
#endregion
//绑定当前局域网中的所有SQL服务器
private void Form1_Load(object sender, EventArgs e)
{
SQLDMO.Application SQLServer = new SQLDMO.Application();
SQLDMO.NameList strServerList = SQLServer.ListAvailableSQLServers();
if (strServerList.Count > 0)
{
for (int i = 0; i < strServerList.Count; i )
{
toolStripTextBox1.Items.Add(strServerList.Item(i 1));
}
}
toolStripTextBox1.SelectedIndex = 0;
}
private void toolStripTextBox2_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == 13)
toolStripTextBox3.Focus();
}
private void toolStripTextBox3_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar == 13)
toolStripButton1_Click(sender, e);
}
//登录SQL服务器
private void toolStripButton1_Click(object sender, EventArgs e)
{
treeView1.Nodes.Clear();
try
{
strServer = toolStripTextBox1.Text;
strUID = toolStripTextBox2.Text;
strPwd = toolStripTextBox3.Text;
string str = "Data Source=" strServer ";database=master;Uid=" strUID ";Pwd=" strPwd ";";
TreeNode TNode = new TreeNode("服务器：" strServer);
DataTable myTable = getTable(str, "select name from sysdatabases", "sysdatabases");
for (int i = 0; i < myTable.Rows.Count; i )
TNode.Nodes.Add(myTable.Rows[i]["name"].ToString());
treeView1.Nodes.Add(TNode);
}
catch { }
}
//退出当前应用程序
private void toolStripButton2_Click(object sender, EventArgs e)
{
Application.Exit();
}
//控制快捷菜单
private void treeView1_AfterSelect(object sender, TreeViewEventArgs e)
{
strDatabase = e.Node.Text;
if (strDatabase.Contains("服务器："))
{
备份数据库ToolStripMenuItem.Enabled = 还原数据库ToolStripMenuItem.Enabled = 分离数据库ToolStripMenuItem.Enabled = false;
附加数据库ToolStripMenuItem.Enabled = true;
}
else
{
备份数据库ToolStripMenuItem.Enabled = 还原数据库ToolStripMenuItem.Enabled = 分离数据库ToolStripMenuItem.Enabled = true;
附加数据库ToolStripMenuItem.Enabled = false;
}
}
//切换到备份数据库面板
private void 备份数据库ToolStripMenuItem_Click(object sender, EventArgs e)
{
tabControl1.SelectedIndex = 1;
}
//切换到还原数据库面板
private void 还原数据库ToolStripMenuItem_Click(object sender, EventArgs e)
{
tabControl1.SelectedIndex = 2;
}
//切换到附加数据库面板
private void 附加数据库ToolStripMenuItem_Click(object sender, EventArgs e)
{
tabControl1.SelectedIndex = 0;
}
//分离数据库
private void 分离数据库ToolStripMenuItem_Click(object sender, EventArgs e)
{
using (SqlConnection con = new SqlConnection("Data Source=" strServer ";Database=master;uid=" strUID ";pwd=" strPwd ";"))
{
try
{
con.Open();
string sql = "exec sp_detach_db @dbname='" strDatabase "'";
string single = "alter database " strDatabase " set single_user with rollback immediate " sql;
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
cmd.CommandText = single;
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("数据库分离成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
toolStripButton1_Click(sender, e);
treeView1.ExpandAll();
}
catch (Exception ey)
{
MessageBox.Show(ey.Message, "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
//选择要附加的数据库
private void button1_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "*.mdf(数据库文件)|*.mdf|*.*(所有文件)|*.*";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
string strName = openFileDialog1.FileName;
textBox1.Text = strName;
if (strName.ToLower().Contains("_data"))
textBox2.Text = strName.Remove(strName.LastIndexOf("_Data")).Substring(strName.Remove(strName.LastIndexOf("_Data")).LastIndexOf('\\') 1);
else
textBox2.Text = strName.Remove(strName.LastIndexOf('.')).Substring(strName.Remove(strName.LastIndexOf('.')).LastIndexOf('\\') 1);
}
}
//附加数据库
private void button2_Click(object sender, EventArgs e)
{
using (SqlConnection con = new SqlConnection("Data Source=" strServer ";Database=master;uid=" strUID ";pwd=" strPwd ";"))
{
try
{
SqlCommand cmd = new SqlCommand();
con.Open();
cmd.Connection = con;
StringBuilder sb = new StringBuilder();
sb.Append("sp_attach_single_file_db @dbname='" textBox2.Text "',");
sb.Append("@physname='" textBox1.Text "'");
cmd.CommandText = sb.ToString();
cmd.ExecuteNonQuery();
con.Close();
MessageBox.Show("数据库附加成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
toolStripButton1_Click(sender, e);
treeView1.ExpandAll();
}
catch (Exception ety)
{
MessageBox.Show(ety.Message, "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
}
//选择备份文件的存放路径
private void button3_Click(object sender, EventArgs e)
{
if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
textBox3.Text = folderBrowserDialog1.SelectedPath;
}
//备份数据库
private void button4_Click(object sender, EventArgs e)
{
string filepath = "";
if (textBox3.Text.EndsWith("\\"))
filepath = textBox3.Text textBox4.Text.Trim();
else
filepath = textBox3.Text "\\" textBox4.Text.Trim();
if (!File.Exists(filepath))
{
SqlConnection con = new SqlConnection(); //利用代码实现连接数据库
con.ConnectionString = "Data Source=" strServer ";Database=" strDatabase ";uid=" strUID ";pwd=" strPwd ";";
con.Open();
SqlCommand com = new SqlCommand();
com.CommandText = "BACKUP DATABASE " strDatabase " TO DISK = '" filepath "'";
com.Connection = con; //连接
com.ExecuteNonQuery(); //执行
con.Close();
MessageBox.Show("数据库备份成功！", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("请重新命名！", "警告", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
//选择要还原的数据库文件
private void button5_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "*.bak(备份文件)|*.bak|*.*(所有文件)|*.*";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
textBox5.Text = openFileDialog1.FileName;
}
}
//还原数据库
private void button6_Click(object sender, EventArgs e)
{
string path = textBox5.Text;//获得备份文件路径
if (path != "" && strDatabase != "")
{
string SqlStr1 = "Data Source=" strServer ";Database=" strDatabase ";uid=" strUID ";pwd=" strPwd ";";
string SqlStr2 = "use master restore database " strDatabase " from disk='" path "'";
string SqlStr3 = "backup log db_CRM to disk='" path "' use master restore database " strDatabase " from disk='" path "'";
string single1 = "alter database " strDatabase " set single_user with rollback immediate " SqlStr2;
string single2 = "alter database " strDatabase " set single_user with rollback immediate " SqlStr3;
using (SqlConnection con = new SqlConnection(SqlStr1))
{
SqlCommand cmd = new SqlCommand();
cmd.Connection = con;
con.Open();
try
{
cmd.CommandText = single1;
cmd.ExecuteNonQuery();
MessageBox.Show("数据库还原成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
catch
{
cmd.CommandText = single2;
cmd.ExecuteNonQuery();
MessageBox.Show("数据库还原成功!", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
finally
{
con.Close();
}
}
}
}
#region 获得数据表结构
/// <summary>
/// 获得数据表结构
/// </summary>
/// <param name="strCon">连接字符串</param>
/// <param name="strSql">SQL语句</param>
/// <param name="strTable">数据表名</param>
/// <returns>DataTable类型</returns>
private DataTable getTable(string strCon, string strSql, string strTable)
{
try
{
SqlConnection sqlcon = new SqlConnection(strCon);
SqlDataAdapter da = new SqlDataAdapter(strSql, sqlcon);
DataTable dt = new DataTable(strTable);
da.Fill(dt);
return dt;
}
catch
{
return null;
}
}
#endregion
}
标签： 数据库
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