C# - VS2019 WebService创建与发布，并部署到Windows Server 2012R / 四六文摘

前言

　　上一次数据库灾备和性能优化后，数据库专家建议，在不扩容的情况下，客户端不能再频繁的扫描数据库了！一句惊醒梦中人，因为我也发现数据库越来越卡了，自从上个项目上线后，就出现了这个情况。后来分析其原因，发现客户端每3秒中扫描一次数据库，一共5000+客户端，可想而知，频繁扫描严重影响到数据库性能。所以，我这边准备采用三层架构来解决这个问题，将现有的业务逻辑全部移植到WebService服务器上，客户端通过WebService服务，进而实现对数据库的操作。

　　此篇只是记录一下，便于后续的学习，不足之处请指正。

创建WebService服务

新建ASP.NET Web解决方案，命名为WebServiceTest，框架选择.NET Framework 4,如下图；

添加一个Web服务，命名为WebServiceOracleTest，如下图；

开始写一些基础Helper类；

1 using System;  2 using System.Collections.Generic;  3 using System.Linq;  4 using System.Web;  5 using System.Data;  6 using System.Configuration;  7 using Oracle.ManagedDataAccess.Client;  8 using System.Text;  9 using System.IO; 10  11 namespace WebServiceTest 12 { 13     public class OracleHelper 14     { 15         //连接字符串 16         public static string oraConnStr = "Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=XXX)(PORT=1521))(CONNECT_DATA=(SERVICE_NAME=XXX)));Persist Security Info=True;User ID=XXX;Password=XXX"; 17  18         #region Oracle数据库操作通用方法 19         /// <summary> 20         /// 测试数据库连接是否正常 21         /// </summary> 22         /// <param name="strConn"></param> 23         /// <returns></returns> 24         public static bool CheckOracleConnect() 25         { 26             try 27             { 28                 OracleConnection conn = new OracleConnection(); 29                 conn.ConnectionString = oraConnStr; 30                 conn.Open(); 31                 return true; 32             } 33             catch 34             { 35                 return false; 36             } 37         } 38  39         /// <summary>   40         /// 执行数据库非查询操作,返回受影响的行数   41         /// </summary>   42         /// <param name="connectionString">数据库连接字符串</param> 43         /// <param name="cmdType">命令的类型</param> 44         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>   45         /// <param name="cmdParms">命令参数集合</param>   46         /// <returns>当前查询操作影响的数据行数</returns>   47         public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms) 48         { 49             OracleCommand cmd = new OracleCommand(); 50             using (OracleConnection conn = new OracleConnection(connectionString)) 51             { 52                 PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms); 53                 int val = cmd.ExecuteNonQuery(); 54                 cmd.Parameters.Clear(); 55                 return val; 56             } 57         } 58  59         /// <summary>   60         /// 执行数据库事务非查询操作,返回受影响的行数   61         /// </summary>   62         /// <param name="transaction">数据库事务对象</param>   63         /// <param name="cmdType">Command类型</param>   64         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>   65         /// <param name="cmdParms">命令参数集合</param>   66         /// <returns>当前事务查询操作影响的数据行数</returns>   67         public static int ExecuteNonQuery(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms) 68         { 69             OracleCommand cmd = new OracleCommand(); 70             PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, cmdParms); 71             int val = cmd.ExecuteNonQuery(); 72             cmd.Parameters.Clear(); 73             return val; 74         } 75  76         /// <summary>   77         /// 执行数据库非查询操作,返回受影响的行数   78         /// </summary>   79         /// <param name="connection">Oracle数据库连接对象</param>   80         /// <param name="cmdType">Command类型</param>   81         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>   82         /// <param name="cmdParms">命令参数集合</param>   83         /// <returns>当前查询操作影响的数据行数</returns>   84         public static int ExecuteNonQuery(OracleConnection connection, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms) 85         { 86             if (connection == null) 87                 throw new ArgumentNullException("当前数据库连接不存在"); 88             OracleCommand cmd = new OracleCommand(); 89             PrepareCommand(cmd, connection, null, cmdType, cmdText, cmdParms); 90             int val = cmd.ExecuteNonQuery(); 91             cmd.Parameters.Clear(); 92             return val; 93         } 94  95         /// <summary>   96         /// 执行数据库查询操作,返回OracleDataReader类型的内存结果集   97         /// </summary>   98         /// <param name="connectionString">数据库连接字符串</param> 99         /// <param name="cmdType">命令的类型</param>100         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  101         /// <param name="cmdParms">命令参数集合</param>  102         /// <returns>当前查询操作返回的OracleDataReader类型的内存结果集</returns>  103         public static OracleDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)104         {105             OracleCommand cmd = new OracleCommand();106             OracleConnection conn = new OracleConnection(connectionString);107             try108             {109                 PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);110                 OracleDataReader reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);111                 cmd.Parameters.Clear();112                 return reader;113             }114             catch115             {116                 cmd.Dispose();117                 conn.Close();118                 throw;119             }120         }121 122         /// <summary>  123         /// 执行数据库查询操作,返回DataSet类型的结果集  124         /// </summary>  125         /// <param name="connectionString">数据库连接字符串</param>126         /// <param name="cmdType">命令的类型</param>127         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  128         /// <param name="cmdParms">命令参数集合</param>  129         /// <returns>当前查询操作返回的DataSet类型的结果集</returns>  130         public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)131         {132             OracleCommand cmd = new OracleCommand();133             OracleConnection conn = new OracleConnection(connectionString);134             DataSet ds = null;135             try136             {137                 PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);138                 OracleDataAdapter adapter = new OracleDataAdapter();139                 adapter.SelectCommand = cmd;140                 ds = new DataSet();141                 adapter.Fill(ds);142                 cmd.Parameters.Clear();143             }144             catch145             {146                 throw;147             }148             finally149             {150                 cmd.Dispose();151                 conn.Close();152                 conn.Dispose();153             }154 155             return ds;156         }157 158         /// <summary>  159         /// 执行数据库查询操作,返回DataTable类型的结果集  160         /// </summary>  161         /// <param name="connectionString">数据库连接字符串</param>162         /// <param name="cmdType">命令的类型</param>163         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  164         /// <param name="cmdParms">命令参数集合</param>  165         /// <returns>当前查询操作返回的DataTable类型的结果集</returns>  166         public static DataTable ExecuteDataTable(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)167         {168             OracleCommand cmd = new OracleCommand();169             OracleConnection conn = new OracleConnection(connectionString);170             DataTable dt = null;171 172             try173             {174                 PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);175                 OracleDataAdapter adapter = new OracleDataAdapter();176                 adapter.SelectCommand = cmd;177                 dt = new DataTable();178                 adapter.Fill(dt);179                 cmd.Parameters.Clear();180             }181             catch182             {183                 throw;184             }185             finally186             {187                 cmd.Dispose();188                 conn.Close();189                 conn.Dispose();190             }191 192             return dt;193         }194 195         /// <summary>  196         /// 执行数据库查询操作,返回结果集中位于第一行第一列的Object类型的值  197         /// </summary>  198         /// <param name="connectionString">数据库连接字符串</param>199         /// <param name="cmdType">命令的类型</param>200         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  201         /// <param name="cmdParms">命令参数集合</param>  202         /// <returns>当前查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>  203         public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)204         {205             OracleCommand cmd = new OracleCommand();206             OracleConnection conn = new OracleConnection(connectionString);207             object result = null;208             try209             {210                 PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);211                 result = cmd.ExecuteScalar();212                 cmd.Parameters.Clear();213             }214             catch215             {216                 throw;217             }218             finally219             {220                 cmd.Dispose();221                 conn.Close();222                 conn.Dispose();223             }224 225             return result;226         }227 228         ///    <summary>  229         ///    执行数据库事务查询操作,返回结果集中位于第一行第一列的Object类型的值  230         ///    </summary>  231         ///    <param name="trans">一个已存在的数据库事务对象</param>  232         ///    <param name="commandType">命令类型</param>  233         ///    <param name="commandText">Oracle存储过程名称或PL/SQL命令</param>  234         ///    <param name="cmdParms">命令参数集合</param>  235         ///    <returns>当前事务查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>  236         public static object ExecuteScalar(OracleTransaction trans, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)237         {238             if (trans == null)239                 throw new ArgumentNullException("当前数据库事务不存在");240             OracleConnection conn = trans.Connection;241             if (conn == null)242                 throw new ArgumentException("当前事务所在的数据库连接不存在");243 244             OracleCommand cmd = new OracleCommand();245             object result = null;246 247             try248             {249                 PrepareCommand(cmd, conn, trans, cmdType, cmdText, cmdParms);250                 result = cmd.ExecuteScalar();251                 cmd.Parameters.Clear();252             }253             catch254             {255                 throw;256             }257             finally258             {259                 trans.Dispose();260                 cmd.Dispose();261                 conn.Close();262                 conn.Dispose();263             }264 265             return result;266         }267 268         /// <summary>  269         /// 执行数据库查询操作,返回结果集中位于第一行第一列的Object类型的值  270         /// </summary>  271         /// <param name="conn">数据库连接对象</param>  272         /// <param name="cmdType">Command类型</param>  273         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  274         /// <param name="cmdParms">命令参数集合</param>  275         /// <returns>当前查询操作返回的结果集中位于第一行第一列的Object类型的值</returns>  276         public static object ExecuteScalar(OracleConnection conn, CommandType cmdType, string cmdText, params OracleParameter[] cmdParms)277         {278             if (conn == null) throw new ArgumentException("当前数据库连接不存在");279             OracleCommand cmd = new OracleCommand();280             object result = null;281 282             try283             {284                 PrepareCommand(cmd, conn, null, cmdType, cmdText, cmdParms);285                 result = cmd.ExecuteScalar();286                 cmd.Parameters.Clear();287             }288             catch289             {290                 throw;291             }292             finally293             {294                 cmd.Dispose();295                 conn.Close();296                 conn.Dispose();297             }298 299             return result;300         }301 302         /// <summary>  303         /// 执行数据库命令前的准备工作  304         /// </summary>  305         /// <param name="cmd">Command对象</param>  306         /// <param name="conn">数据库连接对象</param>  307         /// <param name="trans">事务对象</param>  308         /// <param name="cmdType">Command类型</param>  309         /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>  310         /// <param name="cmdParms">命令参数集合</param>  311         private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] cmdParms)312         {313             if (conn.State != ConnectionState.Open)314                 conn.Open();315 316             cmd.Connection = conn;317             cmd.CommandText = cmdText;318 319             if (trans != null)320                 cmd.Transaction = trans;321 322             cmd.CommandType = cmdType;323 324             if (cmdParms != null)325             {326                 foreach (OracleParameter parm in cmdParms)327                     cmd.Parameters.Add(parm);328             }329         }330 331         /// <summary>  332         /// 将.NET日期时间类型转化为Oracle兼容的日期时间格式字符串  333         /// </summary>  334         /// <param name="date">.NET日期时间类型对象</param>  335         /// <returns>Oracle兼容的日期时间格式字符串（如该字符串：TO_DATE('2007-12-1','YYYY-MM-DD')）</returns>  336         public static string GetOracleDateFormat(DateTime date)337         {338             return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','YYYY-MM-DD')";339         }340 341         /// <summary>  342         /// 将.NET日期时间类型转化为Oracle兼容的日期格式字符串  343         /// </summary>  344         /// <param name="date">.NET日期时间类型对象</param>  345         /// <param name="format">Oracle日期时间类型格式化限定符</param>  346         /// <returns>Oracle兼容的日期时间格式字符串（如该字符串：TO_DATE('2007-12-1','YYYY-MM-DD')）</returns>  347         public static string GetOracleDateFormat(DateTime date, string format)348         {349             if (format == null || format.Trim() == "") format = "YYYY-MM-DD";350             return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','" + format + "')";351         }352 353         /// <summary>  354         /// 将指定的关键字处理为模糊查询时的合法参数值  355         /// </summary>  356         /// <param name="source">待处理的查询关键字</param>  357         /// <returns>过滤后的查询关键字</returns>  358         public static string HandleLikeKey(string source)359         {360             if (source == null || source.Trim() == "") return null;361 362             source = source.Replace("[", "[]]");363             source = source.Replace("_", "[_]");364             source = source.Replace("%", "[%]");365 366             return ("%" + source + "%");367         }368         #endregion369     }370 }

View Code

写几个和Oracle交互的函数；

1 [WebMethod(Description = "测试数据库连接,无输入参数,返回bool类型true或者false")] 2         public bool CheckOraConnect() 3         { 4             return OracleHelper.CheckOracleConnect(); 5         } 6  7         [WebMethod(Description = "输入日期型参数,返回string类型周别")] 8         public string GetWeek(string sDate) 9         {10             try11             {12                 // 创建参数对象13                 OracleParameter[] param = new OracleParameter[] { new OracleParameter(":date1", OracleDbType.Varchar2) };14                 param[0].Value = sDate;15                 // 返回 datatable转换成string；16                 DataSet ds = new DataSet();17                 ds = OracleHelper.ExecuteDataSet(OracleHelper.oraConnStr, CommandType.Text, CommonSQL.sqlGetWeek, param);18                 if (ds.Tables.Count > 0 && ds.Tables[0].Rows.Count > 0)19                 {20                     return ds.Tables[0].Rows[0][0].ToString();21                 }22                 else23                 {24                     return "Not Found";25                 }26             }27             catch (Exception ex)28             {29                 return ex.ToString();30             }31 32         }

View Code

配置Web.config(添加一段，解决“测试窗体只能用于来自本地计算机的请求”的异常)

1      <webServices>2         <protocols>3           <add name="HttpSoap"/>4           <add name="HttpPost"/>5           <add name="HttpGet"/>6           <add name="Documentation"/>7         </protocols>8       </webServices>

View Code