在我的Windows窗体应用程序中,我有一个扩展backgroundworker的类,让我们在我的表单类中将其称为ExtendedBGW1.cs我将其声明为成员变量,因此我有整个类的范围,如下所示:
public partial class Main : Form
{
ExtendedBGW1 ebgw1;
}
稍后在表单构造函数中我这样做
public Main()
{
InitializeComponent();
ebgw1 = new ExtendedBGW1();
InitializeBackgoundWorker();
}
我的InitializeBackgroundWoker()方法看起来像这样
private void InitializeBackgoundWorker()
{
ebgw1.DoWork += new DoWorkEventHandler(ebgw1.worker_DoWork);
ebgw1.RunWorkerCompleted += new RunWorkerCompletedEventHandler(processWorkerCompleted);
ebgw1.ProgressChanged += new ProgressChangedEventHandler(processProgressChanged);
ebgw1.WorkerReportsProgress = true;
ebgw1.WorkerSupportsCancellation = true;
}
现在出现了我的设计问题。我现在知道我将有更多类,比如我的extenededBGW1.cs,它将扩展BackGroundWorker,所以我想如果我创建一个IExtenedBackGroundWorker,我可以做这样的事情。
public partial class Main : Form
{
IExtenedBackGroundWorker ebgw1;
}
并且仍然具有Main类的适当范围。然后我可以创建我以后需要的IExtendedBackGroundWorker的任何实现。
我可以在没有太多问题的情况下为方法和属性创建接口,但是当我尝试在基类和Main类的接口之间正确连接事件时,我确实遇到了问题。
有没有人有任何想法?
以下是我在Main
中遇到的错误Error 1 Cannot assign to 'DoWork' because it is a 'method group'
这是我在界面实现中遇到的错误
Error 5 The event 'System.ComponentModel.BackgroundWorker.DoWork' can only appear on the left hand side of += or -=
这是我的界面现在的样子:
interface IExtendedBackGroundWorker
{
bool IsBusy { get; }
bool WorkerReportsProgress { get; set; }
bool WorkerSupportsCancellation { get; set; }
List<CompareObject> ObjList { get; set; }
string FilePath { get; set; }
void RunWorkerAsync();
void CancelAsync();
void DoWork();
void worker_DoWork(object sender, DoWorkEventArgs e);
void RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e);
void ProgressChanged(object sender, ProgressChangedEventArgs e);
}
答案 0 :(得分:9)
简单,只需1 - 2 - 3 - 完成
public interface IMyWorker
{
bool WorkerReportsProgress { get; set; }
bool WorkerSupportsCancellation { get; set; }
event DoWorkEventHandler DoWork;
event ProgressChangedEventHandler ProgressChanged;
event RunWorkerCompletedEventHandler RunWorkerCompleted;
}
public class MyWorker : BackgroundWorker, IMyWorker
{
}
用法:
namespace stackOverflow
{
class Program
{
static void Main(string[] args)
{
IMyWorker worker = new MyWorker();
worker.DoWork += new System.ComponentModel.DoWorkEventHandler(worker_DoWork);
}
static void worker_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
{
throw new NotImplementedException();
}
}
}
玩得开心:)