使用C#修改MySQL数据库用户的root密码

前言

　　利用C#调用CMD窗口实现修改数据库密码

　　实现思路: 

　　　　　　先通过odbc连接数据库，获取到Mysql的根目录。根据根目录的路径调用CMD，连接MySQL，实现修改MySQL数据库密码。

 1 private void modifyPath_Click(object sender, EventArgs e)
 2 {
 3     bool isD = true;
 4     string MysqlPath = string.Empty;
 5     try
 6     {
 7         //获取MySQL安装路径
 8         DataTable db = ExecuteQuery("select @@basedir as basePath from dual","123");
 9         string sqlPath = string.Empty;
10         sqlPath = db.Rows[0]["basePath"].ToString();
11         //只判断目录在C/D盘的可能
12         if (sqlPath.Contains("D:"))
13         {
14             path = sqlPath.Replace("D:", "");
15         }
16         else
17         {
18             path = sqlPath.Replace("C:", "");
19             isD = false;
20         }
21     }
22     catch
23     {
24         Application.Exit();
25     }
26 
27     Process process = new Process();//创建进程对象
28     try
29     {
30         ProcessStartInfo startInfo = new ProcessStartInfo();
31         startInfo.FileName = "cmd.exe";//设定需要执行的命令
32         //startInfo.Arguments = "/C " + 2;//“/C”表示执行完命令后马上退出
33         startInfo.UseShellExecute = false;//不使用系统外壳程序启动
34         startInfo.RedirectStandardInput = true;//不重定向输入
35         startInfo.RedirectStandardOutput = true; //重定向输出
36         //startInfo.RedirectStandardError = true;   //重定向标准错误输出
37         startInfo.CreateNoWindow = true;//不创建窗口
38         process.StartInfo = startInfo;
39         if (process.Start())//开始进程
40         {
41             string newPsd = "123456";
42             newPsd = "mysqladmin -u root -p123 password " + newPsd;
43             if (isD)
44             {
45                 process.StandardInput.WriteLine("d:");
46             }
47             else
48             {
49                 process.StandardInput.WriteLine("cd\\");
50             }
51             process.StandardInput.WriteLine("cd" + path +"bin");
52             process.StandardInput.WriteLine(newPsd);
53         }
54     }
55     catch (Exception ex)
56     {
57         ex.ToString();
58     }
59     finally
60     {
61         if (process != null)
62             process.Close();
63     }
64 }

//备注: 密码可以采用密文的方式，此处为了方便

连接数据库语句ExecuteQuery的方法

 1 public static DataTable ExecuteQuery(string commandText, string psd)
 2 {
 3     DataSet dataSet = new DataSet();
 4     string connectionString = "DRIVER={MySQL ODBC 3.51 Driver};SERVER=localhost;OPTION=3;UID=root;PASSWORD=" + psd + ";Stmt=SET NAMES gb2312;";
 5     IDbConnection dbConnection = new OdbcConnection(connectionString);
 6     DataTable result;
 7     try
 8     {
 9         if (dbConnection.State == ConnectionState.Closed)
10         {
11             dbConnection.Open();
12         }
13         IDbCommand dbCommand = dbConnection.CreateCommand();
14         dbCommand.CommandText = commandText;
15         ((IDataAdapter)new OdbcDataAdapter
16         {
17             SelectCommand = dbCommand
18         }).Fill(dataSet);
19         result = dataSet.Tables[0];
20     }
21     catch (Exception ex)
22     {
23         MessageBox.Show("系统不兼容，配置失败");
24         Application.Exit();
25         result = null;
26     }
27     finally
28     {
29         try
30         {
31             dbConnection.Close();
32         }
33         catch
34         {
35         }
36     }
37     return result;
38 }