372 lines
15 KiB
C#
372 lines
15 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Data.SqlClient;
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using System.Collections;
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using System.Data;
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using System.Windows.Forms;
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namespace CRVM.Utility
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{
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class SqlDBUtility
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{
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private static SqlDBUtility dbInstance = null;
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//public static string sqlConnectionString = "Data Source=FAC1CAL;Persist Security Info=True;User ID=prdb;Password=prdb;Unicode=True";
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//sqlConnStr = "server = localhost; user id = sa; password = xxx; database = northwind"
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public static string sqlConnectionString ="";
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private Hashtable parmCache = Hashtable.Synchronized(new Hashtable());
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private SqlDBUtility()
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{
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sqlConnectionString = SettingConnectionString();
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}
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/// <summary>
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/// singleton
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/// </summary>
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public static SqlDBUtility Instance
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{
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get
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{
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if (dbInstance == null)
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dbInstance = new SqlDBUtility();
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return dbInstance;
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}
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}
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/// <summary>
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/// Make connection string for open database
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/// </summary>
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/// <returns>connection string</returns>
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private string SettingConnectionString()
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{
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//string path = Application.StartupPath + "\\app\\form\\hmisetting.xml";
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string dataconn = "";
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//const string dataConf = "数据库配置";
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//EntityConfigItem database = ConfigHelper.GetInstance(path).GetConfigItemData(dataConf, "database");
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//EntityConfigItem userid = ConfigHelper.GetInstance(path).GetConfigItemData(dataConf, "userid");
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//EntityConfigItem password = ConfigHelper.GetInstance(path).GetConfigItemData(dataConf, "password");
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//EntityConfigItem ip = ConfigHelper.GetInstance(path).GetConfigItemData(dataConf, "ip");
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//dataconn = "server = " + ip.Values + ";User ID=" + userid.Values + ";Password=" + password.Values + ";database=" + database.Values;
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return dataconn;
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}
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/// <summary>
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/// Execute a database query which does not include a select
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/// </summary>
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/// <param name="connString">Connection string to database</param>
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/// <param name="cmdType">Command type either stored procedure or SQL</param>
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/// <param name="cmdText">Acutall SQL Command</param>
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/// <param name="commandParameters">Parameters to bind to the command</param>
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/// <returns></returns>
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public int ExecuteNonQuery(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
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{
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// Create a new Sql command
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SqlCommand cmd = new SqlCommand();
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//Create a connection
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using (SqlConnection connection = new SqlConnection(connectionString))
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{
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//Prepare the command
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PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
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//Execute the command
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int val = cmd.ExecuteNonQuery();
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cmd.Parameters.Clear();
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try
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{
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connection.Close();
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}
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catch
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{ }
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return val;
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}
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}
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/// <summary>
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/// Execute an SqlCommand (that returns no resultset) against an existing database transaction
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders", new SqlParameter(":prodid", 24));
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/// </remarks>
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/// <param name="trans">an existing database transaction</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
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/// <returns>an int representing the number of rows affected by the command</returns>
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public int ExecuteNonQuery(SqlTransaction trans, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
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{
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SqlCommand cmd = new SqlCommand();
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PrepareCommand(cmd, trans.Connection, trans, cmdType, cmdText, commandParameters);
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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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/// <summary>
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/// Execute an SqlCommand (that returns no resultset) against an existing database connection
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter(":prodid", 24));
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/// </remarks>
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/// <param name="conn">an existing database connection</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
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/// <returns>an int representing the number of rows affected by the command</returns>
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public int ExecuteNonQuery(SqlConnection connection, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
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{
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try
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{
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SqlCommand cmd = new SqlCommand();
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PrepareCommand(cmd, connection, null, cmdType, cmdText, commandParameters);
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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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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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connection.Close();
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}
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}
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/// <summary>
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/// Execute a select query that will return a result set
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/// </summary>
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/// <param name="connString">Connection string</param>
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//// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
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/// <returns></returns>
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public SqlDataReader ExecuteReader(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
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{
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//if (oraconn.State != ConnectionState.Open)
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//{
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// oraconn.Open();
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//}
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//Create the command and connection
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SqlCommand cmd = new SqlCommand();
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SqlConnection conn = new SqlConnection(connectionString);
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try
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{
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//Prepare the command to execute
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PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
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// PrepareCommand(cmd, oraconn, null, cmdType, cmdText, commandParameters);
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//Execute the query, stating that the connection should close when the resulting datareader has been read
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SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
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//SqlDataReader rdr = cmd.ExecuteReader(); //xcs,2009-07-27
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cmd.Parameters.Clear();
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return rdr;
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}
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catch
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{
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conn.Close();
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//If an error occurs close the connection as the reader will not be used and we expect it to close the connection
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throw;
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}
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}
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/// <summary>
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/// Execute an SqlCommand that returns the first column of the first record against the database specified in the connection string
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// Object obj = ExecuteScalar(connString, CommandType.StoredProcedure, "PublishOrders", new SqlParameter(":prodid", 24));
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/// </remarks>
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/// <param name="connectionString">a valid connection string for a SqlConnection</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
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/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
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public object ExecuteScalar(string connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
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{
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SqlCommand cmd = new SqlCommand();
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using (SqlConnection conn = new SqlConnection(connectionString))
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{
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PrepareCommand(cmd, conn, null, cmdType, cmdText, commandParameters);
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object val = cmd.ExecuteScalar();
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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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/// <summary>
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/// Execute a SqlCommand (that returns a 1x1 resultset) against the specified SqlTransaction
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/// using the provided parameters.
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/// </summary>
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/// <param name="transaction">A valid SqlTransaction</param>
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/// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">The stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
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/// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
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public object ExecuteScalar(SqlTransaction transaction, CommandType commandType, string commandText, params SqlParameter[] commandParameters)
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{
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if (transaction == null)
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throw new ArgumentNullException("transaction");
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if (transaction != null && transaction.Connection == null)
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throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
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// Create a command and prepare it for execution
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SqlCommand cmd = new SqlCommand();
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PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);
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// Execute the command & return the results
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object retval = cmd.ExecuteScalar();
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// Detach the SqlParameters from the command object, so they can be used again
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cmd.Parameters.Clear();
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return retval;
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}
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/// <summary>
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/// Execute an SqlCommand that returns the first column of the first record against an existing database connection
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/// using the provided parameters.
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/// </summary>
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/// <remarks>
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/// e.g.:
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/// Object obj = ExecuteScalar(conn, CommandType.StoredProcedure, "PublishOrders", new SqlParameter(":prodid", 24));
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/// </remarks>
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/// <param name="conn">an existing database connection</param>
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/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
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/// <param name="commandText">the stored procedure name or PL/SQL command</param>
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/// <param name="commandParameters">an array of SqlParamters used to execute the command</param>
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/// <returns>An object that should be converted to the expected type using Convert.To{Type}</returns>
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public object ExecuteScalar(SqlConnection connectionString, CommandType cmdType, string cmdText, params SqlParameter[] commandParameters)
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{
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try
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{
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SqlCommand cmd = new SqlCommand();
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PrepareCommand(cmd, connectionString, null, cmdType, cmdText, commandParameters);
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object val = cmd.ExecuteScalar();
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cmd.Parameters.Clear();
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return val;
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}
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catch
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{
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//If an error occurs close the connection as the reader will not be used and we expect it to close the connection
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throw;
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}
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finally
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{
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connectionString.Close();
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}
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}
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/// <summary>
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/// Add a set of parameters to the cached
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/// </summary>
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/// <param name="cacheKey">Key value to look up the parameters</param>
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/// <param name="commandParameters">Actual parameters to cached</param>
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public void CacheParameters(string cacheKey, params SqlParameter[] commandParameters)
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{
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parmCache[cacheKey] = commandParameters;
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}
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/// <summary>
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/// Fetch parameters from the cache
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/// </summary>
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/// <param name="cacheKey">Key to look up the parameters</param>
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/// <returns></returns>
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public SqlParameter[] GetCachedParameters(string cacheKey)
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{
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SqlParameter[] cachedParms = (SqlParameter[])parmCache[cacheKey];
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if (cachedParms == null)
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return null;
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// If the parameters are in the cache
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SqlParameter[] clonedParms = new SqlParameter[cachedParms.Length];
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// return a copy of the parameters
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for (int i = 0, j = cachedParms.Length; i < j; i++)
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clonedParms[i] = (SqlParameter)((ICloneable)cachedParms[i]).Clone();
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return clonedParms;
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}
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/// <summary>
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/// Internal function to prepare a command for execution by the database
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/// </summary>
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/// <param name="cmd">Existing command object</param>
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/// <param name="conn">Database connection object</param>
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/// <param name="trans">Optional transaction object</param>
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/// <param name="cmdType">Command type, e.g. stored procedure</param>
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/// <param name="cmdText">Command test</param>
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/// <param name="commandParameters">Parameters for the command</param>
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private void PrepareCommand(SqlCommand cmd, SqlConnection conn, SqlTransaction trans, CommandType cmdType, string cmdText, SqlParameter[] commandParameters)
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{
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//Open the connection if required
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if (conn.State != ConnectionState.Open)
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conn.Open();
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//Set up the command
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cmd.Connection = conn;
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cmd.CommandText = cmdText;
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cmd.CommandType = cmdType;
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//Bind it to the transaction if it exists
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if (trans != null)
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cmd.Transaction = trans;
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// Bind the parameters passed in
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if (commandParameters != null)
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{
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foreach (SqlParameter parm in commandParameters)
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cmd.Parameters.Add(parm);
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}
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}
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/// <summary>
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/// Converter to use boolean data type with Sql
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/// </summary>
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/// <param name="value">Value to convert</param>
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/// <returns></returns>
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public string OraBit(bool value)
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{
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if (value)
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return "Y";
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else
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return "N";
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}
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/// <summary>
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/// Converter to use boolean data type with Sql
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/// </summary>
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/// <param name="value">Value to convert</param>
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/// <returns></returns>
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public bool OraBool(string value)
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{
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if (value.Equals("Y"))
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return true;
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else
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return false;
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}
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}
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}
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