C#备份还原MySql数据库

时间：2022-03-10 17:55

原文:

项目结束，粘点代码出来让Google或Baidu一下，原因是现在还搜不到这么现成的

调用MySql的工具mysqldump来实现。

类Cmd来实现调用cmd命令，
要启动的进程所在的目录是说mysql自动的备份还原数据库工具mysqldump和mysql所在目录，当然，这个方法可以执行别的命令行工具。

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;

    public class Cmd
    {
        /// <summary>
        /// 执行Cmd命令
        /// </summary>
        /// <param name="workingDirectory">要启动的进程的目录</param>
        /// <param name="command">要执行的命令</param>
        public static void StartCmd(String workingDirectory, String command)
        {
            Process p = new Process();
            p.StartInfo.FileName = "cmd.exe";
            p.StartInfo.WorkingDirectory = workingDirectory;
            p.StartInfo.UseShellExecute = false;
            p.StartInfo.RedirectStandardInput = true;
            p.StartInfo.RedirectStandardOutput = true;
            p.StartInfo.RedirectStandardError = true;
            p.StartInfo.CreateNoWindow = true;
            p.Start();
            p.StandardInput.WriteLine(command);
            p.StandardInput.WriteLine("exit");
        }
    }

备份方法：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;
using System.Configuration;

using MDRClient.DataAccess;

namespace MDRClient
{
    public partial class DataBackup : Form
    {
        public DataBackup()
        {
            InitializeComponent();
        }

        private void btnBackup_Click(object sender, EventArgs e)
        {
            try
            {
                //String command = "mysqldump --quick --host=localhost --default-character-set=gb2312 --lock-tables --verbose  --force --port=端口号 --user=用户名 --password=密码数据库名 -r 备份到的地址";

                //构建执行的命令
                StringBuilder sbcommand = new StringBuilder();

                StringBuilder sbfileName = new StringBuilder();
                sbfileName.AppendFormat("{0}", DateTime.Now.ToString()).Replace("-", "").Replace(":", "").Replace(" ", "");
                String fileName = sbfileName.ToString();

                SaveFileDialog saveFileDialog = new SaveFileDialog();
                saveFileDialog.AddExtension = false;
                saveFileDialog.CheckFileExists = false;
                saveFileDialog.CheckPathExists = false;
                saveFileDialog.FileName = fileName;

                if (saveFileDialog.ShowDialog() == DialogResult.OK)
                {
                    String directory = saveFileDialog.FileName;

                    sbcommand.AppendFormat("mysqldump --quick --host=localhost --default-character-set=gbk --lock-tables --verbose  --force --port=端口号 --user=用户名 --password=密码数据库名 -r \"{0}\"", directory);
                    String command = sbcommand.ToString();

                    //获取mysqldump.exe所在路径
                    String appDirecroty = System.Windows.Forms.Application.StartupPath + "\\";
                    Cmd.StartCmd(appDirecroty, command);
                    MessageBox.Show(@"数据库已成功备份到 " + directory + " 文件中", "提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show("数据库备份失败！");

            }
        }

    }
}

还原方法，调用的是mysql自带工具mysql，还原时要注意的是选择的文件所在路径时，文件名要是有空格的话会出
异常，所以在文件路径名加上双引号""

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Diagnostics;
using System.Configuration;

using MDRClient.DataAccess;

namespace MDRClient
{
    public partial class DataRestore : Form
    {
        public DataRestore()
        {
            InitializeComponent();
        }

        private void btnRestore_Click(object sender, EventArgs e)
        {

            //string s = "mysql --port=端口号 --user=用户名 --password=密码数据库名<还原文件所在路径";

            try
            {
                StringBuilder sbcommand = new StringBuilder();

                OpenFileDialog openFileDialog = new OpenFileDialog();

                if (openFileDialog.ShowDialog() == DialogResult.OK)
                {
                    String directory = openFileDialog.FileName;

                    //在文件路径后面加上""避免空格出现异常
                    sbcommand.AppendFormat("mysql --host=localhost --default-character-set=gbk --port=端口号 --user=用户名 --password=密码数据库<\"{0}\"", directory);
                    String command = sbcommand.ToString();

                    //获取mysql.exe所在路径
                    String appDirecroty = System.Windows.Forms.Application.StartupPath + "\\";

                    DialogResult result = MessageBox.Show("您是否真的想覆盖以前的数据库吗？那么以前的数据库数据将丢失！！！", "警告", MessageBoxButtons.YesNo, MessageBoxIcon.Warning);
                    if (result == DialogResult.Yes)
                    {
                        Cmd.StartCmd(appDirecroty, command);
                        MessageBox.Show("数据库还原成功！");
                    }
                }

            }
            catch (Exception ex)
            {
                MessageBox.Show("数据库还原失败！");
            }

        }

    }
}

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