//===============================================================================
// This file is based on the Microsoft Data Access Application Block for .NET
// For more information please go to
// http://msdn.microsoft.com/library/en-us/dnbda/html/daab-rm.asp
// modify by ahshow 2007.08.07
//===============================================================================
//using System;
//using System.Collections.Generic;
//using System.Text;
using System;
using System.Configuration;
using System.Data;
using System.Data.OleDb;
using System.Collections;
namespace CustomReport
{
/**//// <summary>
/// The OleDbHelper class is intended to encapsulate high performance,
/// scalable best practices for common uses of OleDb.
/// </summary>
public abstract class OleDbHelper
{
//Database connection strings
public static readonly string strConnection = "";
//public static readonly string strConnection = ConfigurationManager.ConnectionStrings["ConnectionString1"].ConnectionString;
//public static readonly string ConnectionStringInventoryDistributedTransaction = ConfigurationManager.ConnectionStrings["OleDbConnString2"].ConnectionString;
//public static readonly string ConnectionStringOrderDistributedTransaction = ConfigurationManager.ConnectionStrings["OleDbConnString3"].ConnectionString;
//public static readonly string ConnectionStringProfile = ConfigurationManager.ConnectionStrings["OleDbProfileConnString"].ConnectionString;
// Hashtable to store cached parameters
private static Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
#region ExecuteNonQuery
/**//// <summary>
/// Execute a OleDbCommand (that returns no resultset) against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new OleDbParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a OleDbConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-OleDb command</param>
/// <param name="commandParameters">an array of OleDbParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
using (OleDbConnection conn = new OleDbConnection(connectionString))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
/**//// <summary>
/// 使用默认连接
/// </summary>
/// <param name="cmdType">命令文本类型</param>
/// <param name="cmdText">命令文本</param>
/// <param name="commandParameters">参数集</param>
/// <returns>int</returns>
public static int ExecuteNonQuery(CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
using (OleDbConnection conn = new OleDbConnection(strConnection))
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
/**//// <summary>
/// 使用默认连接,CommandType默认为StoredProcedure
/// </summary>
/// <param name="cmdText">存储过程名</param>
/// <param name="commandParameters">参数集</param>
/// <returns>int</returns>
public static int ExecuteNonQuery(string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
using (OleDbConnection conn = new OleDbConnection(strConnection))
{
PrepareCommand(cmd, conn, null, CommandType.StoredProcedure,cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
}
/**//// <summary>
/// Execute a OleDbCommand (that returns no resultset) against an existing database connection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new OleDbParameter("@prodid", 24));
/// </remarks>
/// <param name="conn">an existing database connection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-OleDb command</param>
/// <param name="commandParameters">an array of OleDbParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(OleDbConnection connection, CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/**//// <summary>
/// Execute a OleDbCommand (that returns no resultset) using an existing OleDb Transaction
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new OleDbParameter("@prodid", 24));
/// </remarks>
/// <param name="trans">an existing OleDb transaction</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-OleDb command</param>
/// <param name="commandParameters">an array of OleDbParamters used to execute the command</param>
/// <returns>an int representing the number of rows affected by the command</returns>
public static int ExecuteNonQuery(OleDbTransaction trans, CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
int val = cmd.ExecuteNonQuery();
cmd.Parameters.Clear();
return val;
}
/**//// <summary>
/// Execute a OleDbCommand that returns a resultset against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// OleDbDataReader r = ExecuteReader(connString, CommandType.StoredProcedure, "PublishOrders", new OleDbParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a OleDbConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-OleDb command</param>
/// <param name="commandParameters">an array of OleDbParamters used to execute the command</param>
/// <returns>A OleDbDataReader containing the results</returns>
#endregion
#region ExecuteReader
public static OleDbDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
OleDbConnection conn = new OleDbConnection(connectionString);
// we use a try/catch here because if the method throws an exception we want to
// close the connection throw code, because no datareader will exist, hence the
// commandBehaviour.CloseConnection will not work
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
OleDbDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
/**//// <summary>
/// 使用默认连接
/// </summary>
/// <param name="cmdType">命令文本类型</param>
/// <param name="cmdText">命令文本</param>
/// <param name="commandParameters">参数集</param>
/// <returns>OleDbDataReader</returns>
public static OleDbDataReader ExecuteReader(CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
OleDbConnection conn = new OleDbConnection(strConnection);
// we use a try/catch here because if the method throws an exception we want to
// close the connection throw code, because no datareader will exist, hence the
// commandBehaviour.CloseConnection will not work
try
{
PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
OleDbDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
/**//// <summary>
/// 使用默认连接,CommandType默认为StoredProcedure
/// </summary>
/// <param name="cmdText">存储过程名</param>
/// <param name="commandParameters">参数集</param>
/// <returns>OleDbDataReader</returns>
public static OleDbDataReader ExecuteReader(string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
OleDbConnection conn = new OleDbConnection(strConnection);
// we use a try/catch here because if the method throws an exception we want to
// close the connection throw code, because no datareader will exist, hence the
// commandBehaviour.CloseConnection will not work
try
{
PrepareCommand(cmd, conn, null, CommandType.StoredProcedure, cmdText, commandParameters);
OleDbDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
cmd.Parameters.Clear();
return rdr;
}
catch
{
conn.Close();
throw;
}
}
#endregion
#region ExecuteScalar
/**//// <summary>
/// Execute a OleDbCommand that returns the first column of the first record against the database specified in the connection string
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new OleDbParameter("@prodid", 24));
/// </remarks>
/// <param name="connectionString">a valid connection string for a OleDbConnection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-OleDb command</param>
/// <param name="commandParameters">an array of OleDbParamters used to execute the command</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public static object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
using (OleDbConnection connection = new OleDbConnection(connectionString))
{
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
/**//// <summary>
/// 使用定义好的连接字符串
/// </summary>
/// <param name="cmdType">命令文本类型</param>
/// <param name="cmdText">命令文本</param>
/// <param name="commandParameters">参数集</param>
/// <returns>object</returns>
public static object ExecuteScalar(CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
using (OleDbConnection connection = new OleDbConnection(strConnection))
{
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
/**//// <summary>
/// 使用定义好的连接字符串,CommandType默认为StoredProcedure
/// </summary>
/// <param name="cmdText">存储过程名</param>
/// <param name="commandParameters">参数集</param>
/// <returns>object</returns>
public static object ExecuteScalar(string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
using (OleDbConnection connection = new OleDbConnection(strConnection))
{
PrepareCommand(cmd, connection, null, CommandType.StoredProcedure, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
}
/**//// <summary>
/// Execute a OleDbCommand that returns the first column of the first record against an existing database connection
/// using the provided parameters.
/// </summary>
/// <remarks>
/// e.g.:
/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new OleDbParameter("@prodid", 24));
/// </remarks>
/// <param name="conn">an existing database connection</param>
/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
/// <param name="commandText">the stored procedure name or T-OleDb command</param>
/// <param name="commandParameters">an array of OleDbParamters used to execute the command</param>
/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
public static object ExecuteScalar(OleDbConnection connection, CommandType cmdType, string cmdText, params OleDbParameter[] commandParameters)
{
OleDbCommand cmd = new OleDbCommand();
PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
object val = cmd.ExecuteScalar();
cmd.Parameters.Clear();
return val;
}
#endregion
#region ExecuteDataSet
/**//// <summary>
/// 返加dataset
/// </summary>
/// <param name="connectionString">连接字符串</param>
/// <param name="cmdType">命令类型，如StoredProcedure,Text</param>
/// <param name="cmdText">the stored procedure name or T-OleDb command</param>
/// <returns>DataSet</returns>
public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText)
{
OleDbConnection OleDbDataConn = new OleDbConnection(connectionString);
OleDbCommand OleDbComm = new OleDbCommand(cmdText, OleDbDataConn);
OleDbComm.CommandType = cmdType;
OleDbDataAdapter OleDbDA = new OleDbDataAdapter(OleDbComm);
DataSet DS = new DataSet();
OleDbDA.Fill(DS);
return DS;
}
/**//// <summary>
/// 使用定义好的连接字符串
/// </summary>
/// <param name="cmdType">命令文本类型</param>
/// <param name="cmdText">命令文本</param>
/// <returns>DataSet</returns>
public static DataSet ExecuteDataSet(CommandType cmdType, string cmdText)
{
OleDbConnection OleDbDataConn = new OleDbConnection(strConnection);
OleDbCommand OleDbComm = new OleDbCommand(cmdText, OleDbDataConn);
OleDbComm.CommandType = cmdType;
OleDbDataAdapter OleDbDA = new OleDbDataAdapter(OleDbComm);
DataSet DS = new DataSet();
OleDbDA.Fill(DS);
return DS;
}
/**//// <summary>
/// 使用定义好的连接字符串,CommandType默认为StoredProcedure
/// </summary>
/// <param name="cmdText">存储过程名</param>
/// <returns>object</returns>
public static DataSet ExecuteDataSet(string cmdText)
{
OleDbConnection OleDbDataConn = new OleDbConnection(strConnection);
OleDbCommand OleDbComm = new OleDbCommand(cmdText, OleDbDataConn);
OleDbComm.CommandType = CommandType.StoredProcedure;
OleDbDataAdapter OleDbDA = new OleDbDataAdapter(OleDbComm);
DataSet DS = new DataSet();
OleDbDA.Fill(DS);
return DS;
}
/**//// <summary>
/// 返加dataset
/// </summary>
/// <param name="connectionString">连接字符串</param>
/// <param name="cmdType">命令类型，如StoredProcedure,Text</param>
/// <param name="cmdText">the stored procedure name or T-OleDb command</param>
/// <param name="OleDbparams">参数集</param>
/// <returns>DataSet</returns>
public static DataSet ExecuteDataSet(string connectionString, CommandType cmdType, string cmdText, params OleDbParameter[] OleDbparams)
{
OleDbConnection OleDbDataConn = new OleDbConnection(connectionString);
OleDbCommand OleDbComm = AddOleDbParas(OleDbparams, cmdText, cmdType, OleDbDataConn);
OleDbDataAdapter OleDbDA = new OleDbDataAdapter(OleDbComm);
DataSet DS = new DataSet();
OleDbDA.Fill(DS);
return DS;
}
public static DataSet ExecuteDataSet( CommandType cmdType, string cmdText, params OleDbParameter[] OleDbparams)
{
OleDbConnection OleDbDataConn = new OleDbConnection(strConnection);
OleDbCommand OleDbComm = AddOleDbParas(OleDbparams, cmdText, cmdType, OleDbDataConn);
OleDbDataAdapter OleDbDA = new OleDbDataAdapter(OleDbComm);
DataSet DS = new DataSet();
OleDbDA.Fill(DS);
return DS;
}
/**//// <summary>
/// 使用定义好的连接字符串,CommandType默认为StoredProcedure
/// </summary>
/// <param name="cmdText">存储过程名</param>
/// <param name="commandParameters">参数集</param>
/// <returns>DataSet</returns>
public static DataSet ExecuteDataSet(string cmdText, params OleDbParameter[] OleDbparams)
{
OleDbConnection OleDbDataConn = new OleDbConnection(strConnection);
OleDbCommand OleDbComm = AddOleDbParas(OleDbparams,cmdText,CommandType.StoredProcedure, OleDbDataConn);
OleDbDataAdapter OleDbDA = new OleDbDataAdapter(OleDbComm);
DataSet DS = new DataSet();
OleDbDA.Fill(DS);
return DS;
}
#endregion
#region CacheParameters
/**//// <summary>
/// add parameter array to the cache
/// </summary>
/// <param name="cacheKey">Key to the parameter cache</param>
/// <param name="cmdParms">an array of OleDbParamters to be cached</param>
public static void CacheParameters(string cacheKey, params OleDbParameter[] commandParameters)
{
parmCache[cacheKey] = commandParameters;
}
#endregion
#region GetCachedParameters
/**//// <summary>
/// Retrieve cached parameters
/// </summary>
/// <param name="cacheKey">key used to lookup parameters</param>
/// <returns>Cached OleDbParamters array</returns>
public static OleDbParameter[] GetCachedParameters(string cacheKey)
{
OleDbParameter[] cachedParms = (OleDbParameter[])parmCache[cacheKey];
if (cachedParms == null)
return null;
OleDbParameter[] clonedParms = new OleDbParameter[cachedParms.Length];
for (int i = 0, j = cachedParms.Length; i < j; i++)
clonedParms[i] = (OleDbParameter)((ICloneable)cachedParms[i]).Clone();
return clonedParms;
}
#endregion
#region PrepareCommand
/**//// <summary>
/// Prepare a command for execution
/// </summary>
/// <param name="cmd">OleDbCommand object</param>
/// <param name="conn">OleDbConnection object</param>
/// <param name="trans">OleDbTransaction object</param>
/// <param name="cmdType">Cmd type e.g. stored procedure or text</param>
/// <param name="cmdText">Command text, e.g. Select * from Products</param>
/// <param name="cmdParms">OleDbParameters to use in the command</param>
private static void PrepareCommand(OleDbCommand cmd, OleDbConnection conn, OleDbTransaction trans, CommandType cmdType, string cmdText, OleDbParameter[] cmdParms)
{
if (conn.State != ConnectionState.Open)
conn.Open();
cmd.Connection = conn;
cmd.CommandText = cmdText;
if (trans != null)
cmd.Transaction = trans;
cmd.CommandType = cmdType;
if (cmdParms != null)
{
foreach (OleDbParameter parm in cmdParms)
cmd.Parameters.Add(parm);
}
}
#endregion
#region AddOleDbParas
/**//// <summary>
/// 获得一个完整的Command
/// </summary>
/// <param name="OleDbParas">OleDb的参数数组</param>
/// <param name="CommandText">命令文本</param>
/// <param name="IsStoredProcedure">命令文本是否是存储过程</param>
/// <param name="OleDbDataConn">数据连接</param>
/// <returns></returns>
private static OleDbCommand AddOleDbParas(OleDbParameter[] OleDbParas, string cmdText, CommandType cmdType, OleDbConnection OleDbDataConn)
{
OleDbCommand OleDbComm = new OleDbCommand(cmdText, OleDbDataConn);
OleDbComm.CommandType = cmdType;
if (OleDbParas != null)
{
foreach (OleDbParameter p in OleDbParas)
{
OleDbComm.Parameters.Add(p);
}
}
return OleDbComm;
}
#endregion
}
}
///////////////////////////////
OleDbHelper使用：
新增
MemoryStream m = new MemoryStream();
fpSpread1.Save(m, false);
string sSql = "insert into report_main values(@reportId,@reportName,@reportInfo,@reportFile)";
OleDbParameter[] Parms = new OleDbParameter[4];
Parms[0] = new OleDbParameter("@reportId", OleDbType.VarChar, 36);
Parms[0].Value = frmAddReport.sReportId;
Parms[1] = new OleDbParameter("@reportName", OleDbType.VarChar, 36);
Parms[1].Value = frmAddReport.sReportName;
Parms[2] = new OleDbParameter("@reportInfo", OleDbType.VarChar, 255);
Parms[2].Value = frmAddReport.sReportInfo;
Parms[3] = new OleDbParameter("@reportFile", OleDbType.LongVarBinary);
Parms[3].Value = m.GetBuffer();
OleDbHelper.ExecuteNonQuery(CommandType.Text, sSql, Parms);
m.Close();
修改
MemoryStream m = new MemoryStream();
fpSpread1.Save(m, false);
string sSql = "update report_main set reportFile=@reportFile where reportName=@reportName";
OleDbParameter[] Parms = new OleDbParameter[2];
Parms[0] = new OleDbParameter("@reportFile", OleDbType.LongVarBinary);
Parms[0].Value = m.GetBuffer();
Parms[1] = new OleDbParameter("@reportName", OleDbType.VarChar, 36);
Parms[1].Value = this.Text;
OleDbHelper.ExecuteNonQuery(CommandType.Text, sSql, Parms);
m.Close();
删除
OleDbHelper.ExecuteNonQuery(CommandType.Text, "delete from report_Main where reportName='" + sReportName + "'");
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