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+using System;
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+using System.Data;
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+using System.Collections.Generic;
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+using System.Configuration;
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+using System.Text;
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+using System.IO;
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+using Oracle.ManagedDataAccess.Client;
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+using System.Reflection;
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+
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+namespace Oracle11
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+{
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+ /// <summary>
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+ /// Oracle数据库操作类
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+ /// </summary>
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+ static class OracleHelper
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+ {
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+ /// <summary>
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+ /// 执行数据库非查询操作,返回受影响的行数
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+ /// </summary>
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+ /// <param name="connectionString">数据库连接字符串</param>
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+ /// <param name="cmdType">命令的类型</param>
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+ /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
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+ /// <param name="cmdParms">命令参数集合</param>
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+ /// <returns>当前操作影响的数据行数</returns>
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+ public static int ExecuteNonQuery(string connectionString, string cmdText, params OracleParameter[] cmdParms)
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+ {
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+ OracleCommand cmd = new OracleCommand();
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+ using (OracleConnection conn = new OracleConnection(connectionString))
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+ {
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+ PrepareCommand(cmd, conn, null, CommandType.Text, cmdText, cmdParms);
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+ int val = cmd.ExecuteNonQuery();
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+ cmd.Parameters.Clear();
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+ return val;
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+ }
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+ }
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+
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+
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+
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+ /// <summary>
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+ /// 执行数据库查询操作,返回DataTable类型的结果集
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+ /// </summary>
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+ /// <param name="connectionString">数据库连接字符串</param>
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+ /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
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+ /// <param name="cmdParms">命令参数集合</param>
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+ /// <returns>当前查询操作返回的DataTable类型的结果集</returns>
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+ public static DataTable ExecuteDataTable(string connectionString, string cmdText, params OracleParameter[] cmdParms)
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+ {
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+ OracleCommand cmd = new OracleCommand();
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+ OracleConnection conn = new OracleConnection(connectionString);
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+ DataTable dt = null;
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+
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+ try
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+ {
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+ PrepareCommand(cmd, conn, null, CommandType.Text, cmdText, cmdParms);
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+ OracleDataAdapter adapter = new OracleDataAdapter();
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+ adapter.SelectCommand = cmd;
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+ dt = new DataTable();
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+ adapter.Fill(dt);
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+ cmd.Parameters.Clear();
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+ }
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+ catch
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+ {
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+ throw;
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+ }
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+ finally
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+ {
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+ cmd.Dispose();
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+ conn.Close();
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+ conn.Dispose();
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+ }
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+
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+ return dt;
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+ }
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+
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+ public static List<T> TableToList<T>(this DataTable dt) where T : new()
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+ {
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+ List<T> ts = new List<T>();
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+
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+ Type type = typeof(T);
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+ string tempName = "";
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+ foreach (DataRow dr in dt.Rows)
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+ {
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+ T t = new T();
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+ // 获得此模型的公共属性
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+ PropertyInfo[] propertys = t.GetType().GetProperties();
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+ foreach (PropertyInfo pi in propertys)
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+ {
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+ tempName = pi.Name; // 检查DataTable是否包含此列
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+ if (dt.Columns.Contains(tempName))
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+ {
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+ // 判断此属性是否有Setter
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+ if (!pi.CanWrite) continue;
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+ object value = dr[tempName];
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+ if (value != DBNull.Value)
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+ pi.SetValue(t, value, null);
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+ }
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+ }
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+ ts.Add(t);
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+ }
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+ return ts;
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+ }
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+
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+
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+ /// <summary>
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+ /// 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
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+ /// </summary>
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+ /// <param name="connectionString">数据库连接字符串</param>
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+ /// <param name="cmdType">命令的类型</param>
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+ /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
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+ /// <param name="cmdParms">命令参数集合</param>
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+ /// <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>
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+ public static object ExecuteScalar(string connectionString, string cmdText, params OracleParameter[] cmdParms)
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+ {
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+ OracleCommand cmd = new OracleCommand();
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+ OracleConnection conn = new OracleConnection(connectionString);
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+ object result = null;
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+ try
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+ {
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+ PrepareCommand(cmd, conn, null, CommandType.Text, cmdText, cmdParms);
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+ result = cmd.ExecuteScalar();
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+ cmd.Parameters.Clear();
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+ }
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+ catch
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+ {
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+ throw;
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+ }
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+ finally
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+ {
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+ cmd.Dispose();
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+ conn.Close();
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+ conn.Dispose();
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+ }
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+
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+ return result;
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+ }
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+
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+
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+ /// <summary>
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+ /// 执行数据库命令前的准备工作
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+ /// </summary>
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+ /// <param name="cmd">Command对象</param>
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+ /// <param name="conn">数据库连接对象</param>
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+ /// <param name="trans">事务对象</param>
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+ /// <param name="cmdType">Command类型</param>
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+ /// <param name="cmdText">Oracle存储过程名称或PL/SQL命令</param>
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+ /// <param name="cmdParms">命令参数集合</param>
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+ private static void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, CommandType cmdType, string cmdText, OracleParameter[] cmdParms)
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+ {
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+ if (conn.State != ConnectionState.Open)
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+ conn.Open();
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+
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+ cmd.Connection = conn;
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+ cmd.CommandText = cmdText;
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+
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+ if (trans != null)
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+ cmd.Transaction = trans;
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+
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+ cmd.CommandType = cmdType;
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+
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+ if (cmdParms != null)
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+ {
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+ foreach (OracleParameter parm in cmdParms)
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+ cmd.Parameters.Add(parm);
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+ }
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+ }
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+
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+ /// <summary>
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+ /// 将.NET日期时间类型转化为Oracle兼容的日期时间格式字符串
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+ /// </summary>
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+ /// <param name="date">.NET日期时间类型对象</param>
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+ /// <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>
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+ public static string GetOracleDateFormat(DateTime date)
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+ {
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+ return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','YYYY-MM-DD')";
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+ }
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+
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+ /// <summary>
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+ /// 将.NET日期时间类型转化为Oracle兼容的日期格式字符串
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+ /// </summary>
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+ /// <param name="date">.NET日期时间类型对象</param>
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+ /// <param name="format">Oracle日期时间类型格式化限定符</param>
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+ /// <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>
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+ public static string GetOracleDateFormat(DateTime date, string format)
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+ {
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+ if (format == null || format.Trim() == "") format = "YYYY-MM-DD";
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+ return "TO_DATE('" + date.ToString("yyyy-M-dd") + "','" + format + "')";
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+ }
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+
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+ /// <summary>
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+ /// 将指定的关键字处理为模糊查询时的合法参数值
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+ /// </summary>
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+ /// <param name="source">待处理的查询关键字</param>
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+ /// <returns>过滤后的查询关键字</returns>
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+ public static string HandleLikeKey(string source)
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+ {
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+ if (source == null || source.Trim() == "") return null;
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+
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+ source = source.Replace("[", "[]]");
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+ source = source.Replace("_", "[_]");
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+ source = source.Replace("%", "[%]");
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+
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+ return ("%" + source + "%");
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+ }
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+
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+ /// <summary>
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+ /// 执行存储过程
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+ /// </summary>
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+ /// <param name="connection">SqlServer数据库连接对象</param>
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+ /// <param name="storedProcName">存储过程名</param>
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+ /// <param name="parameters">存储过程参数</param>
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+ /// <returns>SqlDataReader对象</returns>
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+ public static OracleDataReader RunStoredProcedure(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
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+ {
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+ OracleDataReader returnReader = null;
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+ connection.Open();
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+ OracleCommand command = BuildSqlCommand(connection, storedProcName, parameters);
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+ returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
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+ return returnReader;
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+ }
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+
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+ /// <summary>
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+ /// 构建SqlCommand对象
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+ /// </summary>
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+ /// <param name="connection">数据库连接</param>
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+ /// <param name="storedProcName">存储过程名</param>
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+ /// <param name="parameters">存储过程参数</param>
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+ /// <returns>SqlCommand</returns>
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+ private static OracleCommand BuildSqlCommand(OracleConnection connection, string storedProcName, IDataParameter[] parameters)
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+ {
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+ OracleCommand command = new OracleCommand(storedProcName, connection);
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+ command.CommandType = CommandType.StoredProcedure;
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+ foreach (OracleParameter parameter in parameters)
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+ {
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+ command.Parameters.Add(parameter);
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+ }
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+ return command;
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+ }
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+ }
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+}
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