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如何用ASP.NET恢复备份Sql server

关注+2010-04-26作者:

如何用ASP.NET恢复备份Sql server:

  最近做的一个项目因为服务器是在特殊机房上的,因为安全方面的考虑,不能给我们开发者提供FTP服务,所以每次更新版本都得自己跑一趟,而他的机房有很远,所以我一直想能不能开发一个维护版本的系统呢,对数据库和代码进行在线更新,就不用自己跑了,于是就有了下面的尝试,在线恢复和备份SQL Server:

  前台代码:

  <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="SqlDbMgmt.aspx.cs" Inherits="SysSourceMgmt.SqlDbMgmt" %>

  <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "<http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd>">

  <html xmlns="<http://www.w3.org/1999/xhtml>">

  <head runat="server">

  <title></title>

  </head>

  <body>

  <form id="form1" runat="server">

  <div>

  <table>

  <tr>

  <td style="width: 100px">

  <span style="font-size: 9pt">操 作 数 据 库</span>

  </td>

  <td>

  <asp:DropDownList ID="DropDownList1" runat="server" Font-Size="9pt" Width="124px">

  </asp:DropDownList>

  <asp:TextBox ID="txtDbName" runat="server"></asp:TextBox>

  </td>

  <td style="width: 100px">

  </td>

  </tr>

  <tr>

  <td style="width: 100px">

  <span style="font-size: 9pt">备份名称和位置</span>

  </td>

  <td style="width: 100px">

  <asp:TextBox ID="TextBox1" runat="server" Font-Size="9pt" Width="117px"></asp:TextBox>

  </td>

  <td style="width: 100px">

  <span style="font-size: 9pt; color: #ff3300">(如D:\beifen)</span>

  </td>

  </tr>

  <tr>

  <td colspan="3">

  <asp:Button ID="Button1" runat="server" Font-Size="9pt" OnClick="Button1_Click" Text="备份数据库" />

  </td>

  </tr>

  </table>

  </div>

  <div style="width: 100%; height: 100px">

  <table>

  <tr>

  <td style="width: 100px; height: 21px">

  <span style="font-size: 9pt">操 作 数 据 库</span>

  </td>

  <td>

  <asp:DropDownList ID="DropDownList2" runat="server" Font-Size="9pt" Width="124px">

  </asp:DropDownList>

  </td>

  <td style="width: 100px; height: 21px">

  </td>

  </tr>

  <tr>

  <td style="width: 100px">

  <span style="font-size: 9pt">操 作 数 据 库</span>

  </td>

  <td style="width: 100px">

  <asp:FileUpload ID="FileUpload1" runat="server" Font-Size="9pt" Width="190px" />

  </td>

  <td style="width: 100px">

  </td>

  </tr>

  <tr>

  <td colspan="3">

  <asp:Button ID="Button2" runat="server" Font-Size="9pt" OnClick="Button2_Click" Text="还原数据库" />

  <asp:Button ID="Button3" runat="server" Font-Size="9pt" OnClick="Button3_Click" Text="强制还原数据库" />

  </td>

  </tr>

  </table>

  </div>

  </form>

  </body>

  </html>
   后台:

  using System;

 

  using System.Collections.Generic;

  using System.Linq;

  using System.Web;

  using System.Web.UI;

  using System.Web.UI.WebControls;

  using System.Data.SqlClient;

  using System.IO;

  using System.Data;

  using System.Diagnostics;

  namespace SysSourceMgmt

  {

  public partial class SqlDbMgmt : System.Web.UI.Page

  {

  protected void Page_Load(object sender, EventArgs e)

  {

  if (!IsPostBack)

  {

  try

  {

  string SqlStr1 = "Server=(local);DataBase=master;Uid=sa;Pwd=";

  string SqlStr2 = "Exec sp_helpdb";

  SqlConnection con = new SqlConnection(SqlStr1);

  con.Open();

  SqlCommand com = new SqlCommand(SqlStr2, con);

  SqlDataReader dr = com.ExecuteReader();

  this.DropDownList1.DataSource = dr;

  this.DropDownList1.DataTextField = "name";

  this.DropDownList1.DataBind();

  dr.Close();

  con.Close();

  SqlStr1 = "Server=(local);DataBase=master;Uid=sa;Pwd=";

  SqlStr2 = "Exec sp_helpdb";

  con = new SqlConnection(SqlStr1);

  con.Open();

  com = new SqlCommand(SqlStr2, con);

  dr = com.ExecuteReader();

  this.DropDownList1.DataSource = dr;

  this.DropDownList1.DataTextField = "name";

  this.DropDownList1.DataBind();

  dr.Close();

  con.Close();

  }

  catch (Exception)

  {

  }

  }

  }

  protected void Button1_Click(object sender, EventArgs e)

  {

  string dbName = string.Empty;

  if (DropDownList1.Items.Count != 0)

  {

  dbName = DropDownList1.SelectedValue.Trim();

  }

  else

  {

  dbName = txtDbName.Text.Trim();

  }

  string SqlStr1 = "Data Source=.\\sqlexpress;Initial Catalog='" + dbName + "';Integrated Security=True";

  string SqlStr2 = "backup database " + dbName + " to disk='" + this.TextBox1.Text.Trim() + ".bak'";

  SqlConnection con = new SqlConnection(SqlStr1);

  con.Open();

  try

  {

  if (File.Exists(this.TextBox1.Text.Trim()))

  {

  Response.Write("<script language=javascript>alert('此文件已存在,请从新输入!');location='Default.aspx'</script>");

  return;

  }

  SqlCommand com = new SqlCommand(SqlStr2, con);

  com.ExecuteNonQuery();

  Response.Write("<script language=javascript>alert('备份数据成功!');'</script>");

  }

  catch (Exception error)

  {

  Response.Write(error.Message);

  Response.Write("<script language=javascript>alert('备份数据失败!')</script>");

  }

  finally

  {

  con.Close();

  }

  }

  protected void Button2_Click(object sender, EventArgs e)

  {

  string path = this.FileUpload1.PostedFile.FileName; //获得备份路径及数据库名称

  string dbName = string.Empty;

  if (DropDownList1.Items.Count != 0)

  {

  dbName = DropDownList1.SelectedValue.Trim();

  }

 else

 

  {

  dbName = txtDbName.Text.Trim();

  }
   string SqlStr1 = "Data Source=.\\sqlexpress;Initial Catalog='" + dbName + "';Integrated Security=True";

  string SqlStr2 = @"use master restore database " + dbName + " from disk='" + path + "'";

  SqlConnection con = new SqlConnection(SqlStr1);

  con.Open();

  try

  {

  SqlCommand com = new SqlCommand(SqlStr2, con);

  com.ExecuteNonQuery();

  Response.Write("<script language=javascript>alert('还原数据成功!');'</script>");

  }

  catch (Exception error)

  {

  Response.Write(error.Message);

  Response.Write("<script language=javascript>alert('还原数据失败!')</script>");

  txtDbName.Text = SqlStr2;

  }

  finally

  {

  con.Close();

  }

  }

  /// <summary>

  /// 恢复数据库,可选择是否可以强制还原(即在其他人在用的时候,依然可以还原)

  /// </summary>

  /// <param name="databasename">待还原的数据库名称</param>

  /// <param name="databasefile">带还原的备份文件的完全路径</param>

  /// <param name="errormessage">恢复数据库失败的信息</param>

  /// <param name="forceRestore">是否强制还原(恢复),如果为TRUE,则exec killspid '数据库名' 结束此数据库的进程,这样才能还原数据库</param>

  /// <returns></returns>

  public bool RestoreDataBase(string databasename, string databasefile, ref string returnMessage, bool forceRestore, SqlConnection conn)

  {

  bool success = true;

  string path = databasefile;

  string dbname = databasename;

  string restoreSql = "use master;";

  if (forceRestore)//如果强制回复

  restoreSql += string.Format("use master exec killspid '{0}';", databasename);

  restoreSql += "restore database @dbname from disk = @path;";

  SqlCommand myCommand = new SqlCommand(restoreSql, conn);

  myCommand.Parameters.Add("@dbname", SqlDbType.Char);

  myCommand.Parameters["@dbname"].Value = dbname;

  myCommand.Parameters.Add("@path", SqlDbType.Char);

  myCommand.Parameters["@path"].Value = path;

  Response.Write(restoreSql);

  try

  {

  myCommand.Connection.Open();

  myCommand.ExecuteNonQuery();

  returnMessage = "还原成功";

  }

  catch (Exception ex)

  {

  returnMessage = ex.Message;

  success = false;

  }

  finally

  {

  myCommand.Connection.Close();

  }

  return success;

  }

  protected void Button3_Click(object sender, EventArgs e)

  {

  string path = this.FileUpload1.PostedFile.FileName; //获得备份路径及数据库名称

  string dbName = string.Empty;

  if (DropDownList1.Items.Count != 0)

  {

  dbName = DropDownList1.SelectedValue.Trim();

  }

  else

  {

  dbName = txtDbName.Text.Trim();

  }

  string returnMessage = string.Empty;

  string SqlStr1 = "Data Source=.\\sqlexpress;Initial Catalog='" + dbName + "';Integrated Security=True";

 

  SqlConnection con = new SqlConnection(SqlStr1);

  RestoreDataBase(txtDbName.Text, path, ref returnMessage, true,con);

  Response.Write(returnMessage);

  }

  }

  }
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