实例介绍
【实例简介】C#操作Sql数据库的例子
【实例截图】
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
namespace BackupSql
{
public partial class DBTools : Form
{
private static DBTools _Instance = null;
public static DBTools Instance()
{
if (_Instance == null)
{
_Instance = new DBTools();
}
else
{
MessageBox.Show("已经有一个实例在运行！");
}
return _Instance;
}
public DBTools()
{
InitializeComponent();
}
private void GetSQLServerList()
{
//get all available SQL Servers
SQLDMO._Application sqlApp = new SQLDMO.ApplicationClass();
SQLDMO.NameList sqlServers = sqlApp.ListAvailableSQLServers();
for (int i = 0; i < sqlServers.Count; i )
{
object srv = sqlServers.Item(i 1);
if (srv != null)
{
this.cboServers.Items.Add(srv);
}
}
if (this.cboServers.Items.Count > 0)
this.cboServers.SelectedIndex = 0;
else
this.cboServers.Text = "<No available SQL Servers>";
}
private void GetBackUpDB()
{
SQLDMO.Application sqlApp = new SQLDMO.ApplicationClass();
SQLDMO.SQLServer srv = new SQLDMO.SQLServer();
srv.Connect(this.cboServers.Text.Trim(), this.txtUserName.Text.Trim(), this.txtPassword.Text.Trim());
foreach (SQLDMO.Database db in srv.Databases)
{
if (db.Name != null)
this.cboDatabase.Items.Add(db.Name);
}
}
private void pictureBox1_Click(object sender, EventArgs e)
{
MessageBox.Show("欢迎使用数据库备份、还原工具，本工具将协助你备份和还原数据库，确保数据安全!", "备份您的数据库");
}
private void BackUpDB()
{
string selfName = this.txtSavePath.Text.Trim() this.cboDatabase.Text.Trim() "_" System.DateTime.Now.ToString("yyyy-MM-dd_HHmm") "[" cboServers.Text.Trim() "]" ".DAT";
string deviceName = this.cboDatabase.Text.Trim() "bak";
string remark = "数据备份";
//BACKUP DB
SQLDMO.Backup oBackup = new SQLDMO.BackupClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
oBackup.Action = 0;
oBackup.Initialize = true;
SQLDMO.BackupSink_PercentCompleteEventHandler pceh = new SQLDMO.BackupSink_PercentCompleteEventHandler(Step);
oBackup.PercentComplete = pceh;
try
{
oSQLServer.LoginSecure = false;
oSQLServer.Connect(this.cboServers.Text.Trim(), this.txtUserName.Text.Trim(), this.txtPassword.Text.Trim());
oBackup.Action = SQLDMO.SQLDMO_BACKUP_TYPE.SQLDMOBackup_Database;
oBackup.Database = this.cboDatabase.Text.Trim();//数据库名
oBackup.Files = selfName;//文件路径
oBackup.BackupSetName = deviceName;//备份名称
oBackup.BackupSetDescription = remark;//备份描述
oBackup.Initialize = true;
oBackup.SQLBackup(oSQLServer);
}
catch (System.Exception ex)
{
MessageBox.Show("数据备份失败：" ex.ToString());
}
finally
{
oSQLServer.DisConnect();
}
}
private void Step(string message, int percent)
{
this.progressBar1.Value = percent;
}
private void button2_Click(object sender, EventArgs e)
{
this.Cursor = Cursors.WaitCursor;
this.label6.Visible = true;
this.progressBar1.Visible = true;
this.BackUpDB();
this.Cursor = Cursors.Default;
this.label6.Text = "备份已完成!";
}
public void RestoreDB()
{
string filePath = this.txtBackUpFile.Text.Trim();
SQLDMO.Restore oRestore = new SQLDMO.RestoreClass();
SQLDMO.SQLServer oSQLServer = new SQLDMO.SQLServerClass();
oRestore.Action = 0;
SQLDMO.RestoreSink_PercentCompleteEventHandler pceh = new SQLDMO.RestoreSink_PercentCompleteEventHandler(Step);
oRestore.PercentComplete = pceh;
try
{
oSQLServer.Connect(this.cboServers.Text.Trim(), this.txtUserName.Text.Trim(), this.txtPassword.Text.Trim());
SQLDMO.QueryResults qr = oSQLServer.EnumProcesses(-1);
int iColPIDNum = -1;
int iColDbName = -1;
//杀死其它的连接进程
for (int i = 1; i <= qr.Columns; i )
{
string strName = qr.get_ColumnName(i);
if (strName.ToUpper().Trim() == "SPID")
{
iColPIDNum = i;
}
else if (strName.ToUpper().Trim() == "DBNAME")
{
iColDbName = i;
}
if (iColPIDNum != -1 && iColDbName != -1)
break;
}
for (int i = 1; i <= qr.Rows; i )
{
int lPID = qr.GetColumnLong(i, iColPIDNum);
string strDBName = qr.GetColumnString(i, iColDbName);
if (strDBName.ToUpper() == "CgRecord".ToUpper())
oSQLServer.KillProcess(lPID);
}
oRestore.Action = SQLDMO.SQLDMO_RESTORE_TYPE.SQLDMORestore_Database;
oRestore.Database = this.cboDBtoBackup.Text;
oRestore.Files = filePath;
oRestore.FileNumber = 1;
oRestore.ReplaceDatabase = true;
oRestore.SQLRestore(oSQLServer);
}
catch (System.Exception ex)
{
MessageBox.Show("数据还原失败：" ex.ToString());
}
finally
{
oSQLServer.DisConnect();
}
}
private void button3_Click(object sender, EventArgs e)
{
this.folderBrowserDialog1.Description = "请选择备份文件存放目录";
this.folderBrowserDialog1.ShowNewFolderButton = true;
this.folderBrowserDialog1.ShowDialog();
this.txtSavePath.Text = this.folderBrowserDialog1.SelectedPath;
}
private void button4_Click(object sender, EventArgs e)
{
this.openFileDialog1.DefaultExt = "*.dat";
this.openFileDialog1.Title = "请选择要还原的数据库备份文件.";
this.openFileDialog1.ShowDialog();
this.txtBackUpFile.Text = this.openFileDialog1.FileName;
}
private void button5_Click(object sender, EventArgs e)
{
this.Cursor = Cursors.WaitCursor;
this.label6.Visible = true;
this.progressBar1.Visible = true;
this.RestoreDB();
this.Cursor = Cursors.Default;
this.label6.Text = "还原已完成!";
}
private void button6_Click(object sender, EventArgs e)
{
Close();
}
private void button１_Click(object sender, EventArgs e)
{
this.txtSavePath.Text = Application.StartupPath;
// GetSQLServerList();
GetBackUpDB();
}
}
}
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