96 lines
2.7 KiB
C#
96 lines
2.7 KiB
C#
using HelperDB;
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using System;
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using System.Data;
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using System.Data.SqlClient;
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using System.Windows.Forms;
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namespace AIMSDAL
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{
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public partial class Connection : IDisposable
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{
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private SqlConnection connection;
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private SqlTransaction transaction;
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private SqlCommand command;
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private static string connectionString;
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public static string ConnectionString
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{
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get
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{
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if (connectionString == null)
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{
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connectionString = new XmlUse(Application.StartupPath + "\\AIMS.xml").GetNode("ConnectionString")[0].ToString();
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}
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return connectionString;
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}
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}
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private bool disposed = false;
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public SqlCommand Command
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{
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get { return command; }
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}
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//打开连接并启用事务
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public void Open()
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{
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connection = new SqlConnection(Connection.ConnectionString);
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connection.Open();
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command = connection.CreateCommand();
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transaction = connection.BeginTransaction();
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command.Transaction = transaction;
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}
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//打开连接，并由参数指定是否启用事务
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public void Open(bool useTransaction)
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{
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connection = new SqlConnection(Connection.ConnectionString);
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connection.Open();
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command = connection.CreateCommand();
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if (useTransaction)
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{
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transaction = connection.BeginTransaction();
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command.Transaction = transaction;
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}
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}
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//关闭连接
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public void Close()
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{
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connection.Dispose();
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}
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//回滚
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public void Rollback()
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{
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transaction.Rollback();
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}
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//提交
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public void Commit()
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{
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transaction.Commit();
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}
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#region IDisposable接口实现
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// 实现IDisposable接口
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public void Dispose()
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{
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Dispose(true);
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// 通知垃圾收集器将自己回收
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GC.SuppressFinalize(this);
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}
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// Dispose(bool disposing) 在两种场景下调用，
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// 如果disposing等于true,通过用户代码调用
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// 如果disposing等于false,运行时在调用finalizer时调用
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private void Dispose(bool disposing)
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{
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//如果Disposed等于true，表示已被调用过
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if(!this.disposed)
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{
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// 如果disposing等于true,释放所有托管和非托管资源
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if(disposing)
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{
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command.Dispose();
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connection.Dispose();
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}
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}
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disposed = true;
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}
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#endregion
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}
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} |