ASP.NET实现在线备份与恢复Sql server

发布时间:2020-06-10编辑:脚本学堂
ASP.NET实现在线备份与恢复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:
 

复制代码 代码如下:
<%@ 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>

后台代码:
 

复制代码 代码如下:

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);
        }
    }
}

效果图:
img1

经过试验,大体完成了我需要的功能,具体优化后期进行中。