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使用C#調(diào)用存儲(chǔ)過(guò)程,用函數(shù)合理組織代碼,使程

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雖然調(diào)用存儲(chǔ)過(guò)程并不難實(shí)現(xiàn),但是在程序中合理的組織代碼,能使得程序結(jié)構(gòu)更加的明晰,也更加易于維護(hù)。

下面的示例將存儲(chǔ)過(guò)程的調(diào)用分為三部分:

1、為調(diào)用存儲(chǔ)過(guò)程準(zhǔn)備各種數(shù)據(jù):數(shù)據(jù)庫(kù)連接字符串、存儲(chǔ)過(guò)程參數(shù)

2、為執(zhí)行命令準(zhǔn)備參數(shù),使用1中的各種數(shù)據(jù),建立與數(shù)據(jù)庫(kù)的連接,為存儲(chǔ)過(guò)程的調(diào)用準(zhǔn)備好參變量和設(shè)置變量

3、執(zhí)行存儲(chǔ)過(guò)程,如查詢(xún)操作或更新操作

示例代碼如下:

?

    using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Data;

using System.Data.SqlClient;



namespace 使用存儲(chǔ)過(guò)程

{

    class Program

    {

        //配置連接字符串

        public static string ConnString = @"Data Source=Q-PC\SQLEXPRESS;Integrated Security=SSPI;uid=sa;pwd=;Initial Catalog=hangyun";

        static void Main(string[] args)

        {

            Program p = new Program();



            SqlParameter[] parms = new SqlParameter[] //為存儲(chǔ)過(guò)程配置參數(shù)

            { 

                new SqlParameter("@parms0",SqlDbType.NVarChar),

                new SqlParameter("@parms1",SqlDbType.NVarChar),

                                   .

                                   .

                                   .

                                   .

            };

            //為參數(shù)賦值

            parms[0].Value=需要傳入存儲(chǔ)過(guò)程中的值

            parms[1].Value=

            parms[2].Value=

                  .

                  .

                  .

                  .



            p.ExcStoreNonQuery(CommandType.StoredProcedure, "QHC_DomesticCompanyManage", parms);

            Console.ReadLine();

        }



        #region 存儲(chǔ)過(guò)程執(zhí)行更新

        ///<summary>

        ///執(zhí)行一個(gè)不需要返回值的SqlCommand命令,通過(guò)指定專(zhuān)用的連接字符串。

        /// 使用參數(shù)數(shù)組形式提供參數(shù)列表 

        /// </summary>

        /// <remarks>

        /// 使用示例:

        ///  int result = ExcStoreNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter("@prodid", 24));

        /// </remarks>

        /// <param name="connectionString">一個(gè)有效的數(shù)據(jù)庫(kù)連接字符串</param>

        /// <param name="commandType">SqlCommand命令類(lèi)型 (存儲(chǔ)過(guò)程, T-SQL語(yǔ)句, 等等。)</param>

        /// <param name="commandText">存儲(chǔ)過(guò)程的名字或者 T-SQL 語(yǔ)句</param>

        /// <param name="commandParameters">以數(shù)組形式提供SqlCommand命令中用到的參數(shù)列表</param>

        /// <returns>返回一個(gè)數(shù)據(jù)值表示此SqlCommand命令執(zhí)行后影響的行數(shù)</returns>

        public int ExcStoreNonQuery(string connString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)

        {

            SqlCommand cmd = new SqlCommand();

            SqlConnection conn = new SqlConnection(ConnString);

            try

            {

                //通過(guò)PrePareCommand方法將參數(shù)逐個(gè)傳入到SqlCommand的參數(shù)集合中

                PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);

                int val = cmd.ExecuteNonQuery();

                //清空SqlCommand中的參數(shù)列表

                cmd.Parameters.Clear();

                return val;

            }

            catch (Exception e)

            {

                throw new Exception("執(zhí)行任務(wù)失敗:" + e.Message + "   " + cmdText);



            }

            finally

            {

                cmd.Dispose();

                conn.Close();

                conn = null;

            }

        }

        #endregion



        #region 存儲(chǔ)過(guò)程執(zhí)行查詢(xún)

        /// <summary>

        /// 執(zhí)行一條返回結(jié)果集的SqlCommand,通過(guò)一個(gè)已經(jīng)存在的數(shù)據(jù)庫(kù)連接

        /// 使用參數(shù)數(shù)組提供參數(shù)

        /// </summary>

        /// <remarks>

        /// 使用示例:

        /// DataTable table=StoreGetTable(conn,CommandType.StoredProcedure,"PublishOrders");

        /// </remarks>

        /// <param name="connecttionString">一個(gè)現(xiàn)有的數(shù)據(jù)庫(kù)連接</param>

        /// <param name="cmdTye">SqlCommand命令類(lèi)型</param>

        /// <param name="cmdText">存儲(chǔ)過(guò)程的名字或者 T-SQL 語(yǔ)句</param>

        /// <returns>返回一個(gè)表(DataTable)表示查詢(xún)得到的數(shù)據(jù)集</returns>

        public DataTable StroreGetTable(CommandType cmdTye, string cmdText, params SqlParameter[] commandParameters)

        {

            SqlCommand cmd = new SqlCommand();

            DataTable ds = new DataTable();

            SqlConnection conn = new SqlConnection(ConnString);

            try

            {

                PrepareCommand(cmd, conn, null, cmdTye, cmdText, commandParameters);

                SqlDataAdapter adapter = new SqlDataAdapter();

                adapter.SelectCommand = cmd;

                adapter.Fill(ds);

                //返回一個(gè)表集

                return ds;

            }

            catch (Exception e)

            {

                throw new Exception("執(zhí)行任務(wù)失敗:" + e.Message + "   " + cmdText);



            }

            finally

            {

                cmd.Dispose();

                conn.Close();

                conn = null;

            }

        }

        #endregion



        #region 為執(zhí)行命令準(zhǔn)備參數(shù)

        ///<summary>

        ///為執(zhí)行命令準(zhǔn)備參數(shù)

        ///</summary>

        ///<param name="cmd">Sqlcommang命令</param>

        ///<param name="conn">已經(jīng)存在的數(shù)據(jù)庫(kù)連接</param>

        ///<param name="trans">數(shù)據(jù)庫(kù)事物處理</param>

        ///<param name="cmdType">SqlCommand命令類(lèi)型(存儲(chǔ)過(guò)程,T-Sql語(yǔ)句,等等。)</param>

        ///<param name="cmdText">Command text,T-Sql語(yǔ)句,例如:Select * from sufei</param>

        ///<param name="cmdParms">返回帶參數(shù)的命令</param>

        private static void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] cmdParms)

        {

            //判斷數(shù)據(jù)庫(kù)連接狀態(tài)

            if (conn.State != ConnectionState.Open)

                conn.Open();

            cmd.Connection = conn;

            cmd.CommandText = cmdText;

            //判斷是否需要事物處理

            if (trans != null)

            {

                cmd.Transaction = trans;

            }



            cmd.CommandType = cmdType;



            if (cmdParms != null)

            {

                foreach (SqlParameter parm in cmdParms)

                    cmd.Parameters.Add(parm);

            }

        }

        #endregion

    }

}turnValue Output 
  


?

?

使用C#調(diào)用存儲(chǔ)過(guò)程,用函數(shù)合理組織代碼,使程序更加的清晰(示例)


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