C#訪問MySQL數據庫的方法

C#訪問MySQL數據庫的方法

(1)首先需要下載C#訪問MySQL數據庫的ADO.NET驅動程序

下載地址為：

http://dev.mysql.com/downloads/connector/net/6.0.html

我下載的版本為： mysql-connector-net-6.3.8.msi

下載地址如下url:

http://dev.mysql.com/downloads/mirror.php?id=405442

(2)安裝mysql-connector-net

然后直接在Windows操作系統安裝 mysql-connector-net-6.3.8.msi

默認是安裝在C盤：

C:\Program Files\MySQL\MySQL Connector Net 6.3.8\Assemblies

v2.0

v4.0

安裝完后我選擇的是v2.0版本的

然后在應用工程中引用組件MySQL.Data.dll

(3)封裝數據庫訪問組件DbConnectionMySQL

 /// <summary>
     /// MySQL數據庫
     /// 版本 mysql-connector-net-6.3.8.msi
     /// vp:hsg
     /// create date:2012-02-28
     /// </summary>
     [Serializable]
     public class DbConnectionMySQL : DbConnectionWrapper
     {
         public DbConnectionMySQL(string pConnectionString)
             : base(pConnectionString)
         {

             this.m_dbconn = new MySqlConnection(pConnectionString);
             this.m_DbConnState = DbConnState.Free;
         }

         //--
         public override DbDataAdapter GetDbDataAdapter()
         {
             return new MySqlDataAdapter();
         }
         public override DbDataAdapter GetDbDataAdapter(DbCommand dbCommand)
         {
             return new MySqlDataAdapter(dbCommand as MySqlCommand);
         }
         public override DbCommand GetDbCommand()
         {
             return new MySqlCommand();
         }
         public override DbConnection GetDbConnection()
         {
             return new MySqlConnection();
         }
         public override DbCommandBuilder GetDbCommandBuilder()
         {
             return new MySqlCommandBuilder();
         }

         public override DataProviderType GetCurrentDataProviderType()
         {
             return DataProviderType.Sql;
         }

         public override bool IsExistsTable(string TableName, string UserName)
         {
             #region information
             bool rbc = false;    //TABLES表中去查詢 table_name
             string dSql = "select * from TABLES where table_name='" + TableName + "'";
             DataSet ds = this.ExecuteDataSet(dSql);
             if (ds != null)
             {
                 if (ds.Tables[0].Rows.Count > 0)
                 {
                     rbc = true;
                 }
                 else
                 {
                     rbc = false;
                 }
             }
             else
             {
                 rbc = false;
             }
             return rbc;
             #endregion
         }
         public override bool IsExistsField(string FieldName, string TableName)
         {
             #region information
             bool rbc = false;
             string dSql = "";
             dSql = "select * from " + TableName + " where 1<>1";
             DataSet ds = this.ExecuteDataSet(dSql);
             if (ds != null)
             {
                 DataTable dt = ds.Tables[0];
                 for (int j = 0; j < dt.Columns.Count; j++)
                 {
                     if (dt.Columns[j].ColumnName.ToString().ToUpper() == FieldName.ToString().ToUpper())
                     {
                         rbc = true;
                         goto Return_End;
                     }
                 }
                 dt.Dispose();
                 dt = null;
             }
             ds.Dispose();
             ds = null;

         Return_End:

             return rbc;
             #endregion
         }

         public override char ParameterChar
         {
             get
             {
                 return ':';   //SQLite的參數符號為:
             }
         }

         public override DbParameter CreateParameter(string name, object value)
         {
             return new MySqlParameter(name, value);
         }

         public override DbParameter CreateParameter(string name)
         {
             DbParameter dbp = new MySqlParameter();
             dbp.ParameterName = name;
             return dbp;
         }
         public override DbParameter CreateParameter(string name, DbType dbtype, object value)
         {
             DbParameter dbp = new MySqlParameter();
             dbp.ParameterName = name;
             dbp.Value = value;
             dbp.DbType = dbtype;
             return dbp;
         }
         public override DbParameter CreateParameter(string name, DbType dbtype, int size, object value)
         {
             DbParameter dbp = new MySqlParameter();
             dbp.ParameterName = name;
             dbp.Value = value;
             dbp.DbType = dbtype;
             dbp.Size = size;
             return dbp;
         }
     }

(4)客戶端訪問測試開發實例

 public void TestCShape_MySQL()
         {
             string constr = "server=localhost;User Id=root;password=root;Database=xp_users";
             DbConnectionWrapper dbw = new DbConnectionMySQL(constr);
             bool rbc=dbw.TestConnection();
             this.Context.Response.Write(rbc);


             string x = "";
             //刪除語句
             x = "delete from xp_users";
             if (dbw.ExecuteQuery(x) > 0)
             {
                 this.Context.Response.Write("刪除語句成功!下面是SQL語句<br>" + x);
             }
             //插入語句
             x = "insert into xp_users(gid,uid,uname,sex,email,pwd) values('";
             x += "1','hsg77','何XXX',1,'[e-mail]','1')";
             if (dbw.ExecuteQuery(x) > 0)
             {
                 this.Context.Response.Write("插入語句成功!下面是SQL語句<br>"+x);
             }
             //查詢語句
             DataTable dt = dbw.ExecuteDataTable("select * from xp_users");
             if (dt != null && dt.Rows.Count > 0)
             {
                 this.Context.Response.Write("<br>用戶數:"+dt.Rows.Count);
             }
             if (dt != null)
             {
                 dt.Dispose();
                 dt = null;
             }
             dbw.Dispose();
             dbw = null;
         }

----the---end---

create date:2012-02-28