OracleHelper数据库事务处理
2024-08-26 05:01:31
原理：需要开启事务的Action贴上Transaction标签，则Action执行前开启事务，Action执行完提交事务，如果Action报错，则回滚事务。
OracleHelper代码：
using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Configuration;
using System.Data;
using System.Data.OracleClient;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Web;
using System.Xml.Linq;
using System.Data.Objects.DataClasses;
using Models; namespace DBHelper
{
/// <summary>
/// Oracle操作类
/// 2015年6月20日
/// 写程序之前，首先引用System.Data.OracleClient
/// </summary>
public class OracleHelper
{
#region 静态变量
/// <summary>
/// 数据库连接字符串
/// </summary>
private static string connectionString = ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString();
#endregion #region OracleConnection 获取数据库连接
/// <summary>
/// 获取数据库连接
/// </summary>
private static OracleConnection GetConn()
{
OracleConnection connection = null; string key = "Simpo2016_OracleConnection"; if (HttpContext.Current.Items[key] == null)
{
connection = new OracleConnection(connectionString);
connection.Open();
HttpContext.Current.Items[key] = connection;
}
else
{
connection = (OracleConnection)HttpContext.Current.Items[key];
} return connection;
}
#endregion #region OracleTransaction 获取事务对象
/// <summary>
/// 获取事务对象
/// </summary>
private static OracleTransaction GetTran()
{
OracleTransaction tran = null; string key = "Simpo2016_OracleTransaction"; if (HttpContext.Current.Items[key] == null)
{
tran = GetConn().BeginTransaction();
HttpContext.Current.Items[key] = tran;
}
else
{
tran = (OracleTransaction)HttpContext.Current.Items[key];
} return tran;
}
#endregion #region 开起事务标志
/// <summary>
/// 事务标志
/// </summary>
private static string tranFlagKey = "Simpo2016_OracleTransaction_Flag";
/// <summary>
/// 添加事务标志
/// </summary>
public static void AddTranFlag()
{
HttpContext.Current.Items[tranFlagKey] = true;
}
/// <summary>
/// 移除事务标志
/// </summary>
public static void RemoveTranFlag()
{
HttpContext.Current.Items[tranFlagKey] = false;
}
/// <summary>
/// 事务标志
/// </summary>
public static bool TranFlag
{
get
{
bool tranFlag = false; if (HttpContext.Current.Items[tranFlagKey] != null)
{
tranFlag = (bool)HttpContext.Current.Items[tranFlagKey];
} return tranFlag;
}
}
#endregion #region 用于查询的数据库连接
/// <summary>
/// 用于查询的数据库连接
/// </summary>
private OracleConnection m_Conn;
#endregion #region 构造函数
public OracleHelper()
{
m_Conn = new OracleConnection(connectionString);
}
#endregion #region 基础方法
#region 执行简单SQL语句
#region Exists
public bool Exists(string sqlString)
{
using (OracleCommand cmd = new OracleCommand(sqlString, m_Conn))
{
try
{
m_Conn.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return false;
}
else
{
return true;
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
m_Conn.Close();
}
}
}
#endregion #region 执行SQL语句，返回影响的记录数
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="sqlString">SQL语句</param>
/// <returns>影响的记录数</returns>
public int ExecuteSql(string sqlString)
{
OracleConnection connection = GetConn();
using (OracleCommand cmd = new OracleCommand(sqlString, connection))
{
try
{
if (connection.State != ConnectionState.Open) connection.Open();
if (TranFlag) cmd.Transaction = GetTran();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (Exception ex)
{
throw new Exception(ex.Message);
}
finally
{
cmd.Dispose();
if (!TranFlag) connection.Close();
}
}
}
#endregion #region 执行一条计算查询结果语句，返回查询结果
/// <summary>
/// 执行一条计算查询结果语句，返回查询结果（object）
/// </summary>
/// <param name="sqlString">计算查询结果语句</param>
/// <returns>查询结果（object）</returns>
public object GetSingle(string sqlString)
{
using (OracleCommand cmd = new OracleCommand(sqlString, m_Conn))
{
try
{
m_Conn.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
m_Conn.Close();
}
}
}
#endregion #region 执行查询语句，返回SQLiteDataReader
/// <summary>
/// 执行查询语句，返回SQLiteDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="sqlString">查询语句</param>
/// <returns>SQLiteDataReader</returns>
public OracleDataReader ExecuteReader(string sqlString)
{
OracleConnection connection = new OracleConnection(connectionString);
OracleCommand cmd = new OracleCommand(sqlString, connection);
try
{
connection.Open();
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (Exception ex)
{
throw ex;
}
}
#endregion #region 执行查询语句，返回DataSet
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="sqlString">查询语句</param>
/// <returns>DataSet</returns>
public DataSet Query(string sqlString)
{
using (OracleConnection connection = new OracleConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
OracleDataAdapter command = new OracleDataAdapter(sqlString, connection);
command.Fill(ds, "ds");
}
catch (Exception ex)
{
throw ex;
}
finally
{
connection.Close();
}
return ds;
}
}
#endregion
#endregion #region 执行带参数的SQL语句
#region 执行SQL语句，返回影响的记录数
/// <summary>
/// 执行SQL语句，返回影响的记录数
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <returns>影响的记录数</returns>
public int ExecuteSql(string SQLString, params OracleParameter[] cmdParms)
{
OracleConnection connection = GetConn();
using (OracleCommand cmd = new OracleCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
if (TranFlag) cmd.Transaction = GetTran();
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
if (!TranFlag) connection.Close();
}
}
}
#endregion #region 执行查询语句，返回SQLiteDataReader
/// <summary>
/// 执行查询语句，返回SQLiteDataReader ( 注意：调用该方法后，一定要对SqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>SQLiteDataReader</returns>
public OracleDataReader ExecuteReader(string sqlString, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
try
{
PrepareCommand(cmd, m_Conn, null, sqlString, cmdParms);
OracleDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (Exception ex)
{
throw ex;
} }
#endregion #region 执行查询语句，返回DataSet
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="sqlString">查询语句</param>
/// <returns>DataSet</returns>
public DataSet Query(string sqlString, params OracleParameter[] cmdParms)
{
OracleCommand cmd = new OracleCommand();
PrepareCommand(cmd, m_Conn, null, sqlString, cmdParms);
using (OracleDataAdapter da = new OracleDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
m_Conn.Close();
}
return ds;
}
}
#endregion #region PrepareCommand
private void PrepareCommand(OracleCommand cmd, OracleConnection conn, OracleTransaction trans, string cmdText, OracleParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open) conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null) cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;
if (cmdParms != null)
{
foreach (OracleParameter parm in cmdParms)
{
cmd.Parameters.Add(parm);
}
}
}
#endregion
#endregion
#endregion #region 增删改查
#region 获取最大编号
/// <summary>
/// 获取最大编号
/// </summary>
/// <typeparam name="T">实体Model</typeparam>
/// <param name="key">主键</param>
public int GetMaxID<T>(string key)
{
Type type = typeof(T); string sql = string.Format("SELECT Max({0}) FROM {1}", key, type.Name);
using (OracleCommand cmd = new OracleCommand(sql, m_Conn))
{
try
{
m_Conn.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return ;
}
else
{
return int.Parse(obj.ToString()) + ;
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
cmd.Dispose();
m_Conn.Close();
}
}
}
#endregion #region 添加
/// <summary>
/// 添加
/// </summary>
public void Insert(object obj)
{
StringBuilder strSql = new StringBuilder();
Type type = obj.GetType();
strSql.Append(string.Format("insert into {0}(", type.Name)); PropertyInfo[] propertyInfoList = GetEntityProperties(type);
List<string> propertyNameList = new List<string>();
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
propertyNameList.Add(propertyInfo.Name);
} strSql.Append(string.Format("{0})", string.Join(",", propertyNameList.ToArray())));
strSql.Append(string.Format(" values ({0})", string.Join(",", propertyNameList.ConvertAll<string>(a => ":" + a).ToArray())));
OracleParameter[] parameters = new OracleParameter[propertyInfoList.Length];
for (int i = ; i < propertyInfoList.Length; i++)
{
PropertyInfo propertyInfo = propertyInfoList[i];
object val = propertyInfo.GetValue(obj, null);
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, val == null ? DBNull.Value : val);
parameters[i] = oracleParameter;
} ExecuteSql(strSql.ToString(), parameters);
}
#endregion #region 修改
/// <summary>
/// 修改
/// </summary>
public void Update(object obj)
{
object oldObj = Find(obj);
if (oldObj == null) throw new Exception("无法获取到旧数据"); StringBuilder strSql = new StringBuilder();
Type type = obj.GetType();
strSql.Append(string.Format("update {0} ", type.Name)); PropertyInfo[] propertyInfoList = GetEntityProperties(type);
List<string> propertyNameList = new List<string>();
int savedCount = ;
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
if (!object.Equals(oldVal, val))
{
propertyNameList.Add(propertyInfo.Name);
savedCount++;
}
} strSql.Append(string.Format(" set "));
OracleParameter[] parameters = new OracleParameter[savedCount];
StringBuilder sbPros = new StringBuilder();
int k = ;
for (int i = ; i < propertyInfoList.Length; i++)
{
PropertyInfo propertyInfo = propertyInfoList[i];
object oldVal = propertyInfo.GetValue(oldObj, null);
object val = propertyInfo.GetValue(obj, null);
if (!object.Equals(oldVal, val))
{
sbPros.Append(string.Format(" {0}=:{0},", propertyInfo.Name));
OracleParameter oracleParameter = new OracleParameter(":" + propertyInfo.Name, val == null ? DBNull.Value : val);
parameters[k++] = oracleParameter;
}
}
if (sbPros.Length > )
{
strSql.Append(sbPros.ToString(, sbPros.Length - ));
}
strSql.Append(string.Format(" where {0}='{1}'", GetIdName(obj.GetType()), GetIdVal(obj).ToString())); if (savedCount > )
{
ExecuteSql(strSql.ToString(), parameters);
}
}
#endregion #region 删除
/// <summary>
/// 根据Id删除
/// </summary>
public void Delete<T>(int id)
{
Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where {2}='{1}'", type.Name, id, GetIdName(type))); ExecuteSql(sbSql.ToString());
}
/// <summary>
/// 根据Id集合删除
/// </summary>
public void BatchDelete<T>(string ids)
{
if (string.IsNullOrWhiteSpace(ids)) return; Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where {2} in ({1})", type.Name, ids, GetIdName(type))); ExecuteSql(sbSql.ToString());
}
/// <summary>
/// 根据条件删除
/// </summary>
public void Delete<T>(string conditions)
{
if (string.IsNullOrWhiteSpace(conditions)) return; Type type = typeof(T);
StringBuilder sbSql = new StringBuilder();
sbSql.Append(string.Format("delete from {0} where {1}", type.Name, conditions)); ExecuteSql(sbSql.ToString());
}
#endregion #region 获取实体
#region 根据实体获取实体
/// <summary>
/// 根据实体获取实体
/// </summary>
private object Find(object obj)
{
Type type = obj.GetType(); object result = Activator.CreateInstance(type);
bool hasValue = false;
IDataReader rd = null; string sql = string.Format("select * from {0} where {2}='{1}'", type.Name, GetIdVal(obj), GetIdName(obj.GetType())); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = GetEntityProperties(type); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return null;
}
}
#endregion #region 根据Id获取实体
/// <summary>
/// 根据Id获取实体
/// </summary>
private object FindById(Type type, int id)
{
object result = Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; string sql = string.Format("select * from {0} where {2}='{1}'", type.Name, id, GetIdName(type)); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = GetEntityProperties(type); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return null;
}
}
#endregion #region 根据Id获取实体
/// <summary>
/// 根据Id获取实体
/// </summary>
public T FindById<T>(string id) where T : new()
{
Type type = typeof(T);
T result = (T)Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; string sql = string.Format("select * from {0} where {2}='{1}'", type.Name, id, GetIdName(type)); try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = GetEntityProperties(type); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return default(T);
}
}
#endregion #region 根据sql获取实体
/// <summary>
/// 根据sql获取实体
/// </summary>
public T FindBySql<T>(string sql) where T : new()
{
Type type = typeof(T);
T result = (T)Activator.CreateInstance(type);
IDataReader rd = null;
bool hasValue = false; try
{
rd = ExecuteReader(sql); PropertyInfo[] propertyInfoList = GetEntityProperties(type); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
hasValue = true;
IDataRecord record = rd; foreach (PropertyInfo pro in propertyInfoList)
{
if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(result, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} if (hasValue)
{
return result;
}
else
{
return default(T);
}
}
#endregion
#endregion #region 获取列表
/// <summary>
/// 获取列表
/// </summary>
public List<T> FindListBySql<T>(string sql) where T : new()
{
List<T> list = new List<T>();
object obj;
IDataReader rd = null; try
{
rd = ExecuteReader(sql); if (typeof(T) == typeof(int))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else if (typeof(T) == typeof(string))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else
{
PropertyInfo[] propertyInfoList = (typeof(T)).GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
IDataRecord record = rd;
obj = new T(); foreach (PropertyInfo pro in propertyInfoList)
{
if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(obj, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
list.Add((T)obj);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} return list;
}
#endregion #region 获取列表
/// <summary>
/// 获取列表
/// </summary>
public List<T> FindListBySql<T>(string sql, params OracleParameter[] cmdParms) where T : new()
{
List<T> list = new List<T>();
object obj;
IDataReader rd = null; try
{
rd = ExecuteReader(sql, cmdParms); if (typeof(T) == typeof(int))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else if (typeof(T) == typeof(string))
{
while (rd.Read())
{
list.Add((T)rd[]);
}
}
else
{
PropertyInfo[] propertyInfoList = (typeof(T)).GetProperties(); int fcnt = rd.FieldCount;
List<string> fileds = new List<string>();
for (int i = ; i < fcnt; i++)
{
fileds.Add(rd.GetName(i).ToUpper());
} while (rd.Read())
{
IDataRecord record = rd;
obj = new T(); foreach (PropertyInfo pro in propertyInfoList)
{
if (!fileds.Contains(pro.Name.ToUpper()) || record[pro.Name] == DBNull.Value)
{
continue;
} pro.SetValue(obj, record[pro.Name] == DBNull.Value ? null : getReaderValue(record[pro.Name], pro.PropertyType), null);
}
list.Add((T)obj);
}
}
}
catch (Exception ex)
{
throw ex;
}
finally
{
if (rd != null && !rd.IsClosed)
{
rd.Close();
rd.Dispose();
}
} return list;
}
#endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
public PagerModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage) where T : new()
{
PagerModel pagerModel = new PagerModel(); using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
IDbCommand cmd = new OracleCommand(commandText, connection);
pagerModel.totalRows = int.Parse(cmd.ExecuteScalar().ToString()); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); List<T> list = FindListBySql<T>(sb.ToString());
pagerModel.result = list;
} return pagerModel;
}
#endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="sql"></param>
/// <returns></returns>
public PagerModel FindPageBySql<T>(string sql, string orderby, int pageSize, int currentPage, params OracleParameter[] cmdParms) where T : new()
{
PagerModel pagerModel = new PagerModel(); using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
OracleCommand cmd = new OracleCommand(commandText, connection);
PrepareCommand(cmd, connection, null, commandText, cmdParms);
pagerModel.totalRows = int.Parse(cmd.ExecuteScalar().ToString());
cmd.Parameters.Clear(); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); List<T> list = FindListBySql<T>(sb.ToString(), cmdParms);
pagerModel.result = list;
} return pagerModel;
} #endregion #region 分页获取列表
/// <summary>
/// 分页(任意entity，尽量少的字段)
/// </summary>
public DataSet FindPageBySql(string sql, string orderby, int pageSize, int currentPage, out int totalCount, params OracleParameter[] cmdParms)
{
DataSet ds = null; using (OracleConnection connection = new OracleConnection(connectionString))
{
connection.Open();
string commandText = string.Format("select count(*) from ({0}) T", sql);
IDbCommand cmd = new OracleCommand(commandText, connection);
totalCount = int.Parse(cmd.ExecuteScalar().ToString()); int startRow = pageSize * (currentPage - );
int endRow = startRow + pageSize; StringBuilder sb = new StringBuilder();
sb.Append("select * from ( select row_limit.*, rownum rownum_ from (");
sb.Append(sql);
if (!string.IsNullOrWhiteSpace(orderby))
{
sb.Append(" ");
sb.Append(orderby);
}
sb.Append(" ) row_limit where rownum <= ");
sb.Append(endRow);
sb.Append(" ) where rownum_ >");
sb.Append(startRow); ds = Query(sql, cmdParms);
} return ds;
}
#endregion #region getReaderValue 转换数据
/// <summary>
/// 转换数据
/// </summary>
private Object getReaderValue(Object rdValue, Type ptype)
{
if (ptype == typeof(double))
return Convert.ToDouble(rdValue); if (ptype == typeof(decimal))
return Convert.ToDecimal(rdValue); if (ptype == typeof(int))
return Convert.ToInt32(rdValue); if (ptype == typeof(long))
return Convert.ToInt64(rdValue); if (ptype == typeof(DateTime))
return Convert.ToDateTime(rdValue); if (ptype == typeof(Nullable<double>))
return Convert.ToDouble(rdValue); if (ptype == typeof(Nullable<decimal>))
return Convert.ToDecimal(rdValue); if (ptype == typeof(Nullable<int>))
return Convert.ToInt32(rdValue); if (ptype == typeof(Nullable<long>))
return Convert.ToInt64(rdValue); if (ptype == typeof(Nullable<DateTime>))
return Convert.ToDateTime(rdValue); return rdValue;
}
#endregion #region 获取主键名称
/// <summary>
/// 获取主键名称
/// </summary>
public string GetIdName(Type type)
{
PropertyInfo[] propertyInfoList = GetEntityProperties(type);
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(IsIdAttribute), false).Length > )
{
return propertyInfo.Name;
}
}
return "Id";
}
#endregion #region 获取主键值
/// <summary>
/// 获取主键名称
/// </summary>
public object GetIdVal(object val)
{
string idName = GetIdName(val.GetType());
if (!string.IsNullOrWhiteSpace(idName))
{
return val.GetType().GetProperty(idName).GetValue(val, null);
}
return ;
}
#endregion #region 获取实体类属性
/// <summary>
/// 获取实体类属性
/// </summary>
private PropertyInfo[] GetEntityProperties(Type type)
{
List<PropertyInfo> result = new List<PropertyInfo>();
PropertyInfo[] propertyInfoList = type.GetProperties();
foreach (PropertyInfo propertyInfo in propertyInfoList)
{
if (propertyInfo.GetCustomAttributes(typeof(EdmRelationshipNavigationPropertyAttribute), false).Length ==
&& propertyInfo.GetCustomAttributes(typeof(BrowsableAttribute), false).Length == )
{
result.Add(propertyInfo);
}
}
return result.ToArray();
}
#endregion
#endregion #region 事务
#region 开始事务
/// <summary>
/// 开始事务
/// </summary>
public static void BeginTransaction()
{
GetTran();
AddTranFlag();
}
#endregion #region 提交事务
/// <summary>
/// 提交事务
/// </summary>
public static void CommitTransaction()
{
try
{
if (GetConn().State == ConnectionState.Open)
{
GetTran().Commit();
RemoveTranFlag();
}
}
catch (Exception ex)
{
GetTran().Rollback();
RemoveTranFlag();
}
finally
{
if (GetConn().State == ConnectionState.Open) GetConn().Close();
}
}
#endregion #region 回滚事务(出错时调用该方法回滚)
/// <summary>
/// 回滚事务(出错时调用该方法回滚)
/// </summary>
public static void RollbackTransaction()
{
GetTran().Rollback();
RemoveTranFlag();
GetConn().Close();
}
#endregion
#endregion }
}
在MVC4项目的FilterConfig.cs文件中，添加ActionFilter拦截器：
using System.Web;
using System.Web.Mvc;
using Common; namespace TechReport.Web
{
public class FilterConfig
{
public static void RegisterGlobalFilters(GlobalFilterCollection filters)
{
filters.Add(new HandleErrorAttribute());
filters.Add(new ActionFilter());
}
}
}
ActionFilter拦截器代码：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Web.Mvc;
using DBHelper; namespace Common
{
/// <summary>
/// Action拦截器
/// </summary>
public class ActionFilter : FilterAttribute, IActionFilter
{
//在执行操作方法之前调用
public void OnActionExecuting(ActionExecutingContext filterContext)
{
MethodInfo method = filterContext.Controller.GetType().GetMethod(filterContext.ActionDescriptor.ActionName);
object[] transactionAttributes = method.GetCustomAttributes(typeof(TransactionAttribute), false);
if (transactionAttributes.Length > )
{
OracleHelper.BeginTransaction();
}
} //在执行操作方法后调用
public void OnActionExecuted(ActionExecutedContext filterContext)
{
MethodInfo method = filterContext.Controller.GetType().GetMethod(filterContext.ActionDescriptor.ActionName);
object[] transactionAttributes = method.GetCustomAttributes(typeof(TransactionAttribute), false);
if (transactionAttributes.Length > )
{
if (filterContext.Exception == null)
{
OracleHelper.CommitTransaction();
}
else
{
OracleHelper.RollbackTransaction();
filterContext.ExceptionHandled = true;
ContentResult contentResult = new ContentResult();
contentResult.Content = filterContext.Exception.Message;
filterContext.Result = contentResult;
}
}
}
}
}
TransactionAttribute类：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace Common
{
/// <summary>
/// 开启事务，添加此特性的方法不要使用try catch，若要使用，catch中应将错误再次抛出
/// </summary>
[Serializable, AttributeUsage(AttributeTargets.Method)]
public class TransactionAttribute : Attribute
{
}
}
在Action上添加[Transaction]标签：
[Transaction]
public ActionResult Submit(string reportCode)
{
string strParams = Request["params"];
REPORTAUDIT reportAudit = new REPORTAUDIT();
REPORTFLOW reportFlow = new REPORTFLOW(); SYS_USER empdetail = m_UserDal.Get(strParams.Get("AUDITUSERNAME"));
reportAudit.AUDITUSERNAME = strParams.Get("AUDITUSERNAME");
reportAudit.AUDITEMPNAME = empdetail.EMPNAME;
reportAudit.AUDITTYPE = (int)Enums.AuditType.审核;
reportAudit.ISFINISHED = ;
reportAudit.REPORTCODE = reportCode;
reportAudit.TASKTIME = DateTime.Now; long auditSID = m_ReportAudit_DAL.GetAuditSID(reportCode, );
if (m_ReportAudit_DAL.Exists(auditSID))
{
if (m_ReportAudit_DAL.Get(auditSID).ISFINISHED == )
{
return Content("正在提交，请稍后！");
}
else
{
reportAudit.AUDITSID = auditSID;
m_ReportAudit_DAL.Update(reportAudit);
}
}
else
{
reportAudit.AUDITSID = m_ReportAudit_DAL.GetMaxID();
m_ReportAudit_DAL.Insert(reportAudit);
} reportFlow.FLOWSERIALID = m_ReportFlow_DAL.GetMaxID();
reportFlow.OPERATOREMPNAME = AdminUtil.LoginUser.EMPNAME;
reportFlow.OPRATORUSERNAME = AdminUtil.LoginUser.USERNAME;
reportFlow.OPERATORTIME = DateTime.Now;
reportFlow.OPERATORTYPE = ;
reportFlow.OPINION = strParams.Get("OPINION"); REPORT report = m_Report_DAL.GetByReportCode(reportCode);
report.CALLBACKSTATE = ;
report.REPORTSTATEID = (long)Enums.ReportState.待审核;
report.SYSTAR = int.Parse(strParams.Get("SYSTAR"));
report.SECLEVELID = int.Parse(strParams.Get("SECLEVELID"));
report.COVERID = long.Parse(strParams.Get("COVERID"));
m_Report_DAL.Update(report); int flag = Convert.ToInt32(report.COVERID);
REPORTFILE reportFile = m_ReportFile_DAL.Get(reportCode);
if (reportFile != null)
{
string filename = Server.MapPath(m_ReportFile_DAL.Get(reportCode).FILEADDR.ToString());
if ((flag != ) && (flag != ))
{
AddPageInfo(filename, flag, reportCode);
}
} m_ReportFlow_DAL.Insert(reportFlow); return Content("OK");
}
DAL示例：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using DBHelper;
using Models; namespace DAL
{
/// <summary>
///
/// </summary>
public class ReportAudit_DAL
{
#region 变量
private OracleHelper dbHelper = new OracleHelper();
#endregion #region 添加
public void Insert(REPORTAUDIT model)
{
dbHelper.Insert(model);
}
#endregion }
}
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