using System;//引用系统命名空间
using System.Data.OleDb;//引用ADO.net命名空间
using System.Data;//引用数据空间
using System.Runtime.InteropServices;//为了调用GUID
using System.EnterpriseServices;//引用COM+名命空间
using System.Runtime.CompilerServices;//运行时编译服务器
using System.Reflection;//用些全局属性取得强名属性
using System.Data.SqlClient;
[assembly: ApplicationName("COMLibrary")]
//强名文件名和文件属性。用sn.exe生成,用法 sn -k clsStock.snk
//[assembly: AssemblyKeyFileAttribute("clsStock.snk")]
//[assembly: AssemblyKeyName("clsStock.snk")]
[assembly: AssemblyKeyFileAttribute("..\\..\\clsStock.snk")]
[assembly: AssemblyKeyName("..\\..\\clsStock.snk")]
namespace COMLibrary
{
[Transaction(TransactionOption.Required)]
public class DBOperation:ServicedComponent
{

private SqlConnection myConnection;
private SqlCommand myCommand;

/// <summary>
/// connect database
/// </summary>
/// <param name=”connection”>database config infomation
/// formatting : datasource=..;user id=..;password=...
/// </param>
/// <returns></returns>
public void Connect()
{
string connection="workstation id=YANLIXIN;packet size=4096;user id=sa;data source=\"yanlixin\\scgl\";p" +
"ersist security info=True;initial catalog=scgl;password=scgl";
//
myConnection = new SqlConnection( connection );
myConnection.Open();

myCommand = new SqlCommand();
myCommand.Connection = myConnection;

return;
}

/// <summary>
/// Execute one insert statement and insert one record into the table
/// </summary>
/// <param name=”connection”>database config infomation
/// formatting : datasource=..;user id=..;password=...
/// </param>
/// <returns></returns>

public int CommandExcute(string commandstring)
{

int returnValue = 0;

myCommand.CommandText = commandstring;
returnValue = myCommand.ExecuteNonQuery();

return returnValue;

}

/// <summary>
/// Commit the com+ transaction
/// </summary>

public void Commit()
{

ContextUtil.SetComplete();

if(myConnection!=null)
myConnection.Close();

}

/// <summary>
/// Roolback the com+ transaction
/// </summary>

public void Abort()
{

ContextUtil.SetAbort();

if(myConnection!=null)
myConnection.Close();

}

}
}