C#操作postgreSql的DHELPER类
using Npgsql;
using NpgsqlTypes;
using DbMiddleWare;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
namespace DbMiddleWare
{
public abstract class DbHelperPgSql
{
//数据库连接字符串(web.config来配置)，多数据库可使用DbHelperSQLP来实现.
public static string connectionString = PubConstant.ConnectionString;
public DbHelperPgSql()
{
}
#region 公用方法
/// <summary>
/// 判断是否存在某表的某个字段
/// </summary>
/// <param name="tableName">表名称</param>
/// <param name="columnName">列名称</param>
/// <returns>是否存在</returns>
public static bool ColumnExists(string tableName, string columnName)
{
string sql = "select count(1) from syscolumns where [id]=object_id('" + tableName + "') and [name]='" + columnName + "'";
object res = GetSingle(sql);
if (res == null)
{
return false;
}
return Convert.ToInt32(res) > 0;
}
public static int GetMaxID(string FieldName, string TableName)
{
string strsql = "select max(" + FieldName + ")+1 from " + TableName;
object obj = GetSingle(strsql);
if (obj == null)
{
return 1;
}
else
{
return int.Parse(obj.ToString());
}
}
public static bool Exists(string strSql)
{
object obj = GetSingle(strSql);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString()); //也可能=0
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 表是否存在
/// </summary>
/// <param name="TableName"></param>
/// <returns></returns>
public static bool TabExists(string TableName)
{
string strsql = "";
strsql = @"SELECT EXISTS (
SELECT 1
FROM information_schema.tables
WHERE table_schema = '"+ TableName.Split('.')[0] + @"'
AND table_name = '"+ TableName.Split('.')[1] + @"'
);";
//string strsql = "SELECT count(*) FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[" + TableName + "]') AND type in (N'U')";
bool boolResult = Convert.ToBoolean(GetSingle(strsql));
return boolResult;
}
public static bool Exists(string strSql, params NpgsqlParameter[] cmdParms)
{
object obj = GetSingle(strSql, cmdParms);
int cmdresult;
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
cmdresult = 0;
}
else
{
cmdresult = int.Parse(obj.ToString());
}
if (cmdresult == 0)
{
return false;
}
else
{
return true;
}
}
#endregion
#region 执行简单SQL语句
/// <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 static int ExecuteSql(string SQLString)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand(SQLString, connection))
{
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (NpgsqlException e)
{
connection.Close();
throw e;
}
}
}
}
public static int ExecuteSqlByTime(string SQLString, int Times)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand(SQLString, connection))
{
try
{
connection.Open();
cmd.CommandTimeout = Times;
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (NpgsqlException e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">多条SQL语句</param>
public static int ExecuteSqlTran(List<String> SQLStringList)
{
using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
{
conn.Open();
NpgsqlCommand cmd = new NpgsqlCommand();
cmd.Connection = conn;
NpgsqlTransaction tx = conn.BeginTransaction();
cmd.Transaction = tx;
try
{
int count = 0;
for (int n = 0; n < SQLStringList.Count; n++)
{
string strsql = SQLStringList[n];
if (strsql.Trim().Length > 1)
{
cmd.CommandText = strsql;
count += cmd.ExecuteNonQuery();
}
}
tx.Commit();
return count;
}
catch(NpgsqlException ex)
{
tx.Rollback();
throw ex;
return 0;
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSql(string SQLString, string content)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
NpgsqlCommand cmd = new NpgsqlCommand(SQLString, connection);
NpgsqlParameter myParameter = new NpgsqlParameter("@content", SqlDbType.NText);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (NpgsqlException e)
{
throw e;
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 执行带一个存储过程参数的的SQL语句。
/// </summary>
/// <param name="SQLString">SQL语句</param>
/// <param name="content">参数内容,比如一个字段是格式复杂的文章，有特殊符号，可以通过这个方式添加</param>
/// <returns>影响的记录数</returns>
public static object ExecuteSqlGet(string SQLString, string content)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
NpgsqlCommand cmd = new NpgsqlCommand(SQLString, connection);
NpgsqlParameter myParameter = new NpgsqlParameter("@content", SqlDbType.NText);
myParameter.Value = content;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (NpgsqlException e)
{
throw e;
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <summary>
/// 向数据库里插入图像格式的字段(和上面情况类似的另一种实例)
/// </summary>
/// <param name="strSQL">SQL语句</param>
/// <param name="fs">图像字节,数据库的字段类型为image的情况</param>
/// <returns>影响的记录数</returns>
public static int ExecuteSqlInsertImg(string strSQL, byte[] fs)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
NpgsqlCommand cmd = new NpgsqlCommand(strSQL, connection);
NpgsqlParameter myParameter = new NpgsqlParameter("@fs", SqlDbType.Image);
myParameter.Value = fs;
cmd.Parameters.Add(myParameter);
try
{
connection.Open();
int rows = cmd.ExecuteNonQuery();
return rows;
}
catch (NpgsqlException e)
{
throw e;
}
finally
{
cmd.Dispose();
connection.Close();
}
}
}
/// <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 static object GetSingle(string SQLString)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand(SQLString, connection))
{
try
{
connection.Open();
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (NpgsqlException e)
{
connection.Close();
throw e;
}
}
}
}
public static object GetSingle(string SQLString, int Times)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand(SQLString, connection))
{
try
{
connection.Open();
cmd.CommandTimeout = Times;
object obj = cmd.ExecuteScalar();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (NpgsqlException e)
{
connection.Close();
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回NpgsqlDataReader ( 注意：调用该方法后，一定要对NpgsqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>NpgsqlDataReader</returns>
public static NpgsqlDataReader ExecuteReader(string strSQL)
{
NpgsqlConnection connection = new NpgsqlConnection(connectionString);
NpgsqlCommand cmd = new NpgsqlCommand(strSQL, connection);
try
{
connection.Open();
NpgsqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
return myReader;
}
catch (NpgsqlException e)
{
throw e;
}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
NpgsqlDataAdapter command = new NpgsqlDataAdapter(SQLString, connection);
command.Fill(ds, "ds");
}
catch (NpgsqlException ex)
{
throw new NpgsqlException(ex.Message);
}
return ds;
}
}
public static DataSet Query(string SQLString, int Times)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
DataSet ds = new DataSet();
try
{
connection.Open();
NpgsqlDataAdapter command = new NpgsqlDataAdapter(SQLString, connection);
command.SelectCommand.CommandTimeout = Times;
command.Fill(ds, "ds");
}
catch (NpgsqlException ex)
{
throw new NpgsqlException(ex.Message);
}
return ds;
}
}
#endregion
#region 执行带参数的SQL语句
/// <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 static int ExecuteSql(string SQLString, params NpgsqlParameter[] cmdParms)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int rows = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return rows;
}
catch (NpgsqlException e)
{
throw e;
}
}
}
}
public static int ExecuteSql_id(string SQLString, params NpgsqlParameter[] cmdParms)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
int id = Int32.Parse(cmd.ExecuteScalar().ToString());
cmd.Parameters.Clear();
return id;
}
catch (NpgsqlException e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的NpgsqlParameter[]）</param>
public static void ExecuteSqlTran(Hashtable SQLStringList)
{
using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
{
conn.Open();
using (NpgsqlTransaction trans = conn.BeginTransaction())
{
NpgsqlCommand cmd = new NpgsqlCommand();
try
{
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
NpgsqlParameter[] cmdParms = (NpgsqlParameter[])myDE.Value;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的NpgsqlParameter[]）</param>
public static int ExecuteSqlTran(System.Collections.Generic.List<PgSqlCommandInfo> cmdList)
{
using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
{
conn.Open();
using (NpgsqlTransaction trans = conn.BeginTransaction())
{
NpgsqlCommand cmd = new NpgsqlCommand();
try
{
int count = 0;
//循环
foreach (PgSqlCommandInfo myDE in cmdList)
{
string cmdText = myDE.CommandText;
NpgsqlParameter[] cmdParms = (NpgsqlParameter[])myDE.Parameters;
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
if (myDE.PgSqlEffentNextType == PgSqlEffentNextType.WhenHaveContine || myDE.PgSqlEffentNextType == PgSqlEffentNextType.WhenNoHaveContine)
{
if (myDE.CommandText.ToLower().IndexOf("count(") == -1)
{
trans.Rollback();
return 0;
}
object obj = cmd.ExecuteScalar();
bool isHave = false;
if (obj == null && obj == DBNull.Value)
{
isHave = false;
}
isHave = Convert.ToInt32(obj) > 0;
if (myDE.PgSqlEffentNextType == PgSqlEffentNextType.WhenHaveContine && !isHave)
{
trans.Rollback();
return 0;
}
if (myDE.PgSqlEffentNextType == PgSqlEffentNextType.WhenNoHaveContine && isHave)
{
trans.Rollback();
return 0;
}
continue;
}
int val = cmd.ExecuteNonQuery();
count += val;
if (myDE.PgSqlEffentNextType == PgSqlEffentNextType.ExcuteEffectRows && val == 0)
{
trans.Rollback();
return 0;
}
cmd.Parameters.Clear();
}
trans.Commit();
return count;
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的NpgsqlParameter[]）</param>
public static void ExecuteSqlTranWithIndentity(System.Collections.Generic.List<CommandInfo> SQLStringList)
{
using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
{
conn.Open();
using (NpgsqlTransaction trans = conn.BeginTransaction())
{
NpgsqlCommand cmd = new NpgsqlCommand();
try
{
int indentity = 0;
//循环
foreach (CommandInfo myDE in SQLStringList)
{
string cmdText = myDE.CommandText;
NpgsqlParameter[] cmdParms = (NpgsqlParameter[])myDE.Parameters;
foreach (NpgsqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.InputOutput)
{
q.Value = indentity;
}
}
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
foreach (NpgsqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.Output)
{
indentity = Convert.ToInt32(q.Value);
}
}
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <summary>
/// 执行多条SQL语句，实现数据库事务。
/// </summary>
/// <param name="SQLStringList">SQL语句的哈希表（key为sql语句，value是该语句的NpgsqlParameter[]）</param>
public static void ExecuteSqlTranWithIndentity(Hashtable SQLStringList)
{
using (NpgsqlConnection conn = new NpgsqlConnection(connectionString))
{
conn.Open();
using (NpgsqlTransaction trans = conn.BeginTransaction())
{
NpgsqlCommand cmd = new NpgsqlCommand();
try
{
int indentity = 0;
//循环
foreach (DictionaryEntry myDE in SQLStringList)
{
string cmdText = myDE.Key.ToString();
NpgsqlParameter[] cmdParms = (NpgsqlParameter[])myDE.Value;
foreach (NpgsqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.InputOutput)
{
q.Value = indentity;
}
}
PrepareCommand(cmd, conn, trans, cmdText, cmdParms);
int val = cmd.ExecuteNonQuery();
foreach (NpgsqlParameter q in cmdParms)
{
if (q.Direction == ParameterDirection.Output)
{
indentity = Convert.ToInt32(q.Value);
}
}
cmd.Parameters.Clear();
}
trans.Commit();
}
catch
{
trans.Rollback();
throw;
}
}
}
}
/// <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 static object GetSingle(string SQLString, params NpgsqlParameter[] cmdParms)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
using (NpgsqlCommand cmd = new NpgsqlCommand())
{
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
object obj = cmd.ExecuteScalar();
cmd.Parameters.Clear();
if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
{
return null;
}
else
{
return obj;
}
}
catch (NpgsqlException e)
{
throw e;
}
}
}
}
/// <summary>
/// 执行查询语句，返回NpgsqlDataReader ( 注意：调用该方法后，一定要对NpgsqlDataReader进行Close )
/// </summary>
/// <param name="strSQL">查询语句</param>
/// <returns>NpgsqlDataReader</returns>
public static NpgsqlDataReader ExecuteReader(string SQLString, params NpgsqlParameter[] cmdParms)
{
NpgsqlConnection connection = new NpgsqlConnection(connectionString);
NpgsqlCommand cmd = new NpgsqlCommand();
try
{
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
NpgsqlDataReader myReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return myReader;
}
catch (NpgsqlException e)
{
throw e;
}
//finally
//{
//cmd.Dispose();
//connection.Close();
//}
}
/// <summary>
/// 执行查询语句，返回DataSet
/// </summary>
/// <param name="SQLString">查询语句</param>
/// <returns>DataSet</returns>
public static DataSet Query(string SQLString, params NpgsqlParameter[] cmdParms)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
NpgsqlCommand cmd = new NpgsqlCommand();
PrepareCommand(cmd, connection, null, SQLString, cmdParms);
using (NpgsqlDataAdapter da = new NpgsqlDataAdapter(cmd))
{
DataSet ds = new DataSet();
try
{
da.Fill(ds, "ds");
cmd.Parameters.Clear();
}
catch (NpgsqlException ex)
{
throw new NpgsqlException(ex.Message);
}
return ds;
}
}
}
private static void PrepareCommand(NpgsqlCommand cmd, NpgsqlConnection conn, NpgsqlTransaction trans, string cmdText, NpgsqlParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = CommandType.Text;//cmdType;
if (cmdParms != null)
{
foreach (NpgsqlParameter parameter in cmdParms)
{
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
cmd.Parameters.Add(parameter);
}
}
}
#endregion
#region 存储过程操作
/// <summary>
/// 执行存储过程，返回NpgsqlDataReader ( 注意：调用该方法后，一定要对NpgsqlDataReader进行Close )
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>NpgsqlDataReader</returns>
public static NpgsqlDataReader RunProcedure(string storedProcName, IDataParameter[] parameters)
{
NpgsqlConnection connection = new NpgsqlConnection(connectionString);
NpgsqlDataReader returnReader;
connection.Open();
NpgsqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.CommandType = CommandType.StoredProcedure;
returnReader = command.ExecuteReader(CommandBehavior.CloseConnection);
return returnReader;
}
/// <summary>
/// 执行存储过程
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="tableName">DataSet结果中的表名</param>
/// <returns>DataSet</returns>
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
NpgsqlDataAdapter sqlDA = new NpgsqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.Fill(dataSet, tableName);
connection.Close();
return dataSet;
}
}
public static DataSet RunProcedure(string storedProcName, IDataParameter[] parameters, string tableName, int Times)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
DataSet dataSet = new DataSet();
connection.Open();
NpgsqlDataAdapter sqlDA = new NpgsqlDataAdapter();
sqlDA.SelectCommand = BuildQueryCommand(connection, storedProcName, parameters);
sqlDA.SelectCommand.CommandTimeout = Times;
sqlDA.Fill(dataSet, tableName);
connection.Close();
return dataSet;
}
}
/// <summary>
/// 构建 NpgsqlCommand 对象(用来返回一个结果集，而不是一个整数值)
/// </summary>
/// <param name="connection">数据库连接</param>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>NpgsqlCommand</returns>
private static NpgsqlCommand BuildQueryCommand(NpgsqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
NpgsqlCommand command = new NpgsqlCommand(storedProcName, connection);
command.CommandType = CommandType.StoredProcedure;
foreach (NpgsqlParameter parameter in parameters)
{
if (parameter != null)
{
// 检查未分配值的输出参数,将其分配以DBNull.Value.
if ((parameter.Direction == ParameterDirection.InputOutput || parameter.Direction == ParameterDirection.Input) &&
(parameter.Value == null))
{
parameter.Value = DBNull.Value;
}
command.Parameters.Add(parameter);
}
}
return command;
}
/// <summary>
/// 执行存储过程，返回影响的行数
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <param name="rowsAffected">影响的行数</param>
/// <returns></returns>
public static int RunProcedure(string storedProcName, IDataParameter[] parameters, out int rowsAffected)
{
using (NpgsqlConnection connection = new NpgsqlConnection(connectionString))
{
int result;
connection.Open();
NpgsqlCommand command = BuildIntCommand(connection, storedProcName, parameters);
rowsAffected = command.ExecuteNonQuery();
result = (int)command.Parameters["ReturnValue"].Value;
//Connection.Close();
return result;
}
}
/// <summary>
/// 创建 NpgsqlCommand 对象实例(用来返回一个整数值)
/// </summary>
/// <param name="storedProcName">存储过程名</param>
/// <param name="parameters">存储过程参数</param>
/// <returns>NpgsqlCommand 对象实例</returns>
private static NpgsqlCommand BuildIntCommand(NpgsqlConnection connection, string storedProcName, IDataParameter[] parameters)
{
NpgsqlCommand command = BuildQueryCommand(connection, storedProcName, parameters);
command.Parameters.Add(new NpgsqlParameter("ReturnValue", NpgsqlDbType.Integer, 4));
return command;
}
#endregion
}
}
using System;
using Npgsql;
namespace DbMiddleWare
{
public enum PgSqlEffentNextType
{
/// <summary>
/// 对其他语句无任何影响
/// </summary>
None,
/// <summary>
/// 当前语句必须为"select count(1) from .."格式，如果存在则继续执行，不存在回滚事务
/// </summary>
WhenHaveContine,
/// <summary>
/// 当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务
/// </summary>
WhenNoHaveContine,
/// <summary>
/// 当前语句影响到的行数必须大于0，否则回滚事务
/// </summary>
ExcuteEffectRows,
/// <summary>
/// 引发事件-当前语句必须为"select count(1) from .."格式，如果不存在则继续执行，存在回滚事务
/// </summary>
SolicitationEvent
}
public class PgSqlCommandInfo
{
public object ShareObject = null;
public object OriginalData = null;
event EventHandler _solicitationEvent;
public event EventHandler SolicitationEvent
{
add
{
_solicitationEvent += value;
}
remove
{
_solicitationEvent -= value;
}
}
public void OnSolicitationEvent()
{
if (_solicitationEvent != null)
{
_solicitationEvent(this, new EventArgs());
}
}
public string CommandText;
public System.Data.Common.DbParameter[] Parameters;
public PgSqlEffentNextType PgSqlEffentNextType = PgSqlEffentNextType.None;
public PgSqlCommandInfo()
{
}
public PgSqlCommandInfo(string sqlText, NpgsqlParameter[] para)
{
this.CommandText = sqlText;
this.Parameters = para;
}
public PgSqlCommandInfo(string sqlText, NpgsqlParameter[] para, PgSqlEffentNextType type)
{
this.CommandText = sqlText;
this.Parameters = para;
this.PgSqlEffentNextType = type;
}
}
}
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