C# BackgroundWorker是否从外部类报告进度？

我有一个工作解决方案，它向进度条和应用程序主窗体上的标签报告进度和文本。我现在已经将我的worker方法移动到一个类中，以使它们可以跨多个表单访问

在worker方法中有

BW.ReportProgress（）

语句，这些语句将进度和文本以主窗体推送到BackgroundWorker

下面是文件布局，以便更好地了解：

MainScreen.cs

List repSelected = new List();
XMLandRar xXMLandRar = new XMLandRar();

private void Rarbtn_Click(object sender, EventArgs e)
        {
            GetReps();

            //Run worker
            if (!CreateRarBW.IsBusy)
            {
                CreateRarBW.RunWorkerAsync();
            }
        }

//Worker
private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    xXMLandRar.RarFiles(repSelected);
}

//Progress reporting
private void CreateRarBW_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progBar.Value = e.ProgressPercentage;
    Statuslbl.Text = e.UserState.ToString();
}

public class XMLandRar
{
    public void RarFiles(List repSelected)
    {
        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
        }
    }
}

public class XMLandRar
{
    public void RarFiles(List repSelected, BackgroundWorker worker)
    {
    // ...
    }
}

public class XmlandRarCompletedEventArgs : EventArgs
{
    public readonly bool Finished;
    public readonly bool Canceled;

    public XmlandRarCompletedEventArgs(bool finished)
    {
        Finished = finished;
        Canceled = !finished;
    }    

}public class OnXmlandRarUpdateEventArgs : EventArgs
{
    public readonly int Percentage;
    public readonly string Message;

    public XmlandRarCompletedEventArgs(int perc) :
        this(perc, "") {
    }   

    public XmlandRarCompletedEventArgs(int perc, string message)
    {
        Percentage = perc;
        Message = message;
    }    

}

public delegate void OnXmlandRarDoWorkHandler(object o);
public delegate void OnXmlandRarUpdateHandler(object o, OnXmlandRarUpdateEventArgs args);
public delegate void OnXmlandRarCompleteHandler(object o, XmlandRarCompletedEventArgs args);

public class XMLandRar
{
    public event OnXmlandRarDoWorkHandler OnDoWork;
    public event OnXmlandRarUpdateHandler OnUpdate;
    public event OnXmlandRarCompletedHandler OnComplete;

    public void RarFiles(List repSelected)
    {
        TriggerDoWork();

        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            TriggerUpdate(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            TriggerUpdate(i, "Raring files for " + rep);
        }

        TriggerComplete(true);
    }


    private void TriggerDoWork() 
    {
        if (OnDoWork != null) {
            OnDoWork(this);
        }
    }

    private void TriggerUpdate(perc) {
    }
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc));
        }

    private void TriggerUpdate(perc, string message) 
    {
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc, message));
        }
    }

    private void TriggerComplete(bool finished)
    {
        if (OnComplete != null) {
            OnComplete(this, new XmlandRarCompletedEventArgs(finished));
        }
    }
}

然后是我新创建的类，它包含所有的worker方法，并将进程推送到主窗体

XMLandRar.cs

List repSelected = new List();
XMLandRar xXMLandRar = new XMLandRar();

private void Rarbtn_Click(object sender, EventArgs e)
        {
            GetReps();

            //Run worker
            if (!CreateRarBW.IsBusy)
            {
                CreateRarBW.RunWorkerAsync();
            }
        }

//Worker
private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    xXMLandRar.RarFiles(repSelected);
}

//Progress reporting
private void CreateRarBW_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progBar.Value = e.ProgressPercentage;
    Statuslbl.Text = e.UserState.ToString();
}

public class XMLandRar
{
    public void RarFiles(List repSelected)
    {
        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
        }
    }
}

public class XMLandRar
{
    public void RarFiles(List repSelected, BackgroundWorker worker)
    {
    // ...
    }
}

public class XmlandRarCompletedEventArgs : EventArgs
{
    public readonly bool Finished;
    public readonly bool Canceled;

    public XmlandRarCompletedEventArgs(bool finished)
    {
        Finished = finished;
        Canceled = !finished;
    }    

}public class OnXmlandRarUpdateEventArgs : EventArgs
{
    public readonly int Percentage;
    public readonly string Message;

    public XmlandRarCompletedEventArgs(int perc) :
        this(perc, "") {
    }   

    public XmlandRarCompletedEventArgs(int perc, string message)
    {
        Percentage = perc;
        Message = message;
    }    

}

public delegate void OnXmlandRarDoWorkHandler(object o);
public delegate void OnXmlandRarUpdateHandler(object o, OnXmlandRarUpdateEventArgs args);
public delegate void OnXmlandRarCompleteHandler(object o, XmlandRarCompletedEventArgs args);

public class XMLandRar
{
    public event OnXmlandRarDoWorkHandler OnDoWork;
    public event OnXmlandRarUpdateHandler OnUpdate;
    public event OnXmlandRarCompletedHandler OnComplete;

    public void RarFiles(List repSelected)
    {
        TriggerDoWork();

        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            TriggerUpdate(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            TriggerUpdate(i, "Raring files for " + rep);
        }

        TriggerComplete(true);
    }


    private void TriggerDoWork() 
    {
        if (OnDoWork != null) {
            OnDoWork(this);
        }
    }

    private void TriggerUpdate(perc) {
    }
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc));
        }

    private void TriggerUpdate(perc, string message) 
    {
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc, message));
        }
    }

    private void TriggerComplete(bool finished)
    {
        if (OnComplete != null) {
            OnComplete(this, new XmlandRarCompletedEventArgs(finished));
        }
    }
}

---

我遇到的问题是，在

XMLandRar

类中，CreateRarBW没有被识别（显然）-如何在应用程序的主屏幕中对BW进行

ReportProgress

调用？

DoWork回调中的

sender

对象是调用此回调的

BackgroundWorker

实例

这样就可以使用实例并将其添加到新的

XMLandRar

类中

private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    var worker = sender as BackgroundWorker.
    xXMLandRar.RarFiles(repSelected, worker);
}

XMLandRar.cs

List repSelected = new List();
XMLandRar xXMLandRar = new XMLandRar();

private void Rarbtn_Click(object sender, EventArgs e)
        {
            GetReps();

            //Run worker
            if (!CreateRarBW.IsBusy)
            {
                CreateRarBW.RunWorkerAsync();
            }
        }

//Worker
private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    xXMLandRar.RarFiles(repSelected);
}

//Progress reporting
private void CreateRarBW_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progBar.Value = e.ProgressPercentage;
    Statuslbl.Text = e.UserState.ToString();
}

public class XMLandRar
{
    public void RarFiles(List repSelected)
    {
        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
        }
    }
}

public class XMLandRar
{
    public void RarFiles(List repSelected, BackgroundWorker worker)
    {
    // ...
    }
}

public class XmlandRarCompletedEventArgs : EventArgs
{
    public readonly bool Finished;
    public readonly bool Canceled;

    public XmlandRarCompletedEventArgs(bool finished)
    {
        Finished = finished;
        Canceled = !finished;
    }    

}public class OnXmlandRarUpdateEventArgs : EventArgs
{
    public readonly int Percentage;
    public readonly string Message;

    public XmlandRarCompletedEventArgs(int perc) :
        this(perc, "") {
    }   

    public XmlandRarCompletedEventArgs(int perc, string message)
    {
        Percentage = perc;
        Message = message;
    }    

}

public delegate void OnXmlandRarDoWorkHandler(object o);
public delegate void OnXmlandRarUpdateHandler(object o, OnXmlandRarUpdateEventArgs args);
public delegate void OnXmlandRarCompleteHandler(object o, XmlandRarCompletedEventArgs args);

public class XMLandRar
{
    public event OnXmlandRarDoWorkHandler OnDoWork;
    public event OnXmlandRarUpdateHandler OnUpdate;
    public event OnXmlandRarCompletedHandler OnComplete;

    public void RarFiles(List repSelected)
    {
        TriggerDoWork();

        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            TriggerUpdate(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            TriggerUpdate(i, "Raring files for " + rep);
        }

        TriggerComplete(true);
    }


    private void TriggerDoWork() 
    {
        if (OnDoWork != null) {
            OnDoWork(this);
        }
    }

    private void TriggerUpdate(perc) {
    }
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc));
        }

    private void TriggerUpdate(perc, string message) 
    {
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc, message));
        }
    }

    private void TriggerComplete(bool finished)
    {
        if (OnComplete != null) {
            OnComplete(this, new XmlandRarCompletedEventArgs(finished));
        }
    }
}

或将

BackgroundWorker

实例作为类属性设置为

XMLandRar

public class XMLandRar
{
    protected BackgroundWorker mWorker;

    public XMLandRar(BackgroundWorker worker) {
        mWorker = BackgroundWorker;
    }


    public void RarFiles(List repSelected)
    {
        // Do something with {mWorker}
    }
}

或如注释中所述，使用

XMLandRar

类中的事件

private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    var worker = sender as BackgroundWorker.
    xXMLandRar.RarFiles(repSelected, worker);
}

XMLandRar.cs

List repSelected = new List();
XMLandRar xXMLandRar = new XMLandRar();

private void Rarbtn_Click(object sender, EventArgs e)
        {
            GetReps();

            //Run worker
            if (!CreateRarBW.IsBusy)
            {
                CreateRarBW.RunWorkerAsync();
            }
        }

//Worker
private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    xXMLandRar.RarFiles(repSelected);
}

//Progress reporting
private void CreateRarBW_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    progBar.Value = e.ProgressPercentage;
    Statuslbl.Text = e.UserState.ToString();
}

public class XMLandRar
{
    public void RarFiles(List repSelected)
    {
        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            CreateRarBW.ReportProgress(i, "Raring files for " + rep);
        }
    }
}

public class XMLandRar
{
    public void RarFiles(List repSelected, BackgroundWorker worker)
    {
    // ...
    }
}

public class XmlandRarCompletedEventArgs : EventArgs
{
    public readonly bool Finished;
    public readonly bool Canceled;

    public XmlandRarCompletedEventArgs(bool finished)
    {
        Finished = finished;
        Canceled = !finished;
    }    

}public class OnXmlandRarUpdateEventArgs : EventArgs
{
    public readonly int Percentage;
    public readonly string Message;

    public XmlandRarCompletedEventArgs(int perc) :
        this(perc, "") {
    }   

    public XmlandRarCompletedEventArgs(int perc, string message)
    {
        Percentage = perc;
        Message = message;
    }    

}

public delegate void OnXmlandRarDoWorkHandler(object o);
public delegate void OnXmlandRarUpdateHandler(object o, OnXmlandRarUpdateEventArgs args);
public delegate void OnXmlandRarCompleteHandler(object o, XmlandRarCompletedEventArgs args);

public class XMLandRar
{
    public event OnXmlandRarDoWorkHandler OnDoWork;
    public event OnXmlandRarUpdateHandler OnUpdate;
    public event OnXmlandRarCompletedHandler OnComplete;

    public void RarFiles(List repSelected)
    {
        TriggerDoWork();

        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            TriggerUpdate(i, "Raring files for " + rep);
            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;
            TriggerUpdate(i, "Raring files for " + rep);
        }

        TriggerComplete(true);
    }


    private void TriggerDoWork() 
    {
        if (OnDoWork != null) {
            OnDoWork(this);
        }
    }

    private void TriggerUpdate(perc) {
    }
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc));
        }

    private void TriggerUpdate(perc, string message) 
    {
        if (OnUpdate != null) {
            OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc, message));
        }
    }

    private void TriggerComplete(bool finished)
    {
        if (OnComplete != null) {
            OnComplete(this, new XmlandRarCompletedEventArgs(finished));
        }
    }
}

用法：

private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
{
    var worker = sender as BackgroundWorker;
    // Attach events to class
    xXMLandRar.OnDoWork += delegate(object o) {
        // ...
    };
    xXMLandRar.OnUpdate += delegate(object o, OnXmlandRarUpdateEventArgs args) {
        // ...
    };
    xXMLandRar.OnComplete += delegate(object o, XmlandRarCompletedEventArgs args) {
        // ...
    };
    xXMLandRar.RarFiles(repSelected, worker);
}

---

希望没有打字错误，因为我在办公室。

在您的

XMLandRar

类中创建一个活动，您可以订阅

通过这种方式，

XMLandRar

类不需要知道或关心UI或progressbar，它只关心在有人愿意听的情况下发送消息。而且也可以有多个订阅者（比方说，如果您想向后台工作人员报告，可能还需要一个日志）

例如：

private void Rarbtn_Click(object sender, EventArgs e)
{
    GetReps();

    //Run worker
    if (!CreateRarBW.IsBusy)
    {
        // This should be done once, maybe in the contructor. Bind to new event.
        xXMLandRar.ReportProgress += new EventHandler<XMLandRar.ProgressArgs>(xXMLandRar_ReportProgress);

        CreateRarBW.RunWorkerAsync();
    }
}

protected void xXMLandRar_ReportProgress(object sender, XMLandRar.ProgressArgs e)
{
    // Call the UI backgroundworker
    CreateRarBW.ReportProgress(e.Percentage, e.Message);
}

public class XMLandRar
{
    // Event handler to bind to for reporting progress
    public EventHandler<ProgressArgs> ReportProgress;

    // Eventargs to contain information to send to the subscriber
    public class ProgressArgs : EventArgs
    {
        public int Percentage { get; set; }
        public string Message { get; set; }
    }

    public void RarFiles(List repSelected)
    {
        int step = 100 / repSelected.Count();
        int i = 0;
        //Iterate through list and run rar for each
        foreach (string rep in repSelected)
        {
            // Report progress if somebody is listening (subscribed)
            if (ReportProgress != null)
            {
                ReportProgress(this, new ProgressArgs { Percentage = i, Message = "Raring files for " + rep });
            }

            DirectoryExists(rep);
            ProcessRunner(rep);
            i += step;

            // Report progress if somebody is listening (subscribed)
            if (ReportProgress != null)
            {
                ReportProgress(this, new ProgressArgs { Percentage = i, Message = "Raring files for " + rep });
            }
        }
    }
}

private void Rarbtn\u单击（对象发送者，事件参数e）
{
GetReps（）；
//跑工
如果（！CreateRarBW.IsBusy）
{
//这应该做一次，可能在构造函数中。绑定到新事件。
xXMLandRar.ReportProgress+=新事件处理程序（xXMLandRar\u ReportProgress）；
CreateRarBW.RunWorkerAsync（）；
}
}
受保护的void xXMLandRar_ReportProgress（对象发送方，XMLandRar.ProgressArgs e）
{
//调用UI backgroundworker
CreateRarBW.ReportProgress（例如百分比、消息）；
}
公共类XMLandRar
{
//要绑定以报告进度的事件处理程序
公共事务进展；
//Eventargs包含要发送给订阅服务器的信息
公共类ProgressArgs:EventArgs
{
公共整数百分比{get；set；}
公共字符串消息{get；set；}
}
公共文件（已选定列表）
{
int step=100/repSelected.Count（）；
int i=0；
//遍历列表并为每个列表运行rar
foreach（repSelected中的字符串rep）
{
//如果有人正在收听，则报告进度（已订阅）
if（ReportProgress！=null）
{
ReportProgress（这是新的ProgressArgs{Percentage=i，Message=“Raring files for”+rep}）；
}
董事会（代表）；
ProcessRunner（rep）；
i+=阶跃；
//如果有人正在收听，则报告进度（已订阅）
if（ReportProgress！=null）
{
ReportProgress（这是新的ProgressArgs{Percentage=i，Message=“Raring files for”+rep}）；
}
}
}
}

我已经修复了提交的代码中的错误，并将其清除。。。这是一个工作示例，它将帮助那些可能无法理解代码的人，因为代码已经损坏了。。。尽管我想说，清理和增强后代码的意图和功能非常出色

这是可以让您在项目中开始使用backGroundWorker线程来满足任何需要的工作代码

只需修改此方法-

    public void RarFiles(List<string> repSelected)

满足你的需要。。这样当你收到回电时。。您可以使用对这些项所做的更改来更新主UI表单

你可能需要做一些调整。。但你明白我的意思

这是表格代码。。别忘了在表单上创建一个按钮

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;

    namespace ThreadSample
    {
        public partial class Form1 : Form
        {
            List<string> repSelected = new List<string>();
            XMLandRar xXMLandRar = new XMLandRar();
            BackgroundWorker CreateRarBW = new BackgroundWorker();
            public Form1()
            {
                InitializeComponent();
                repSelected = new List<string> { "asdf", "asdfsd", "h;ljj" };
                CreateRarBW.DoWork += new DoWorkEventHandler(CreateRarBW_DoWork);
            }

            private void Rarbtn_Click(object sender, EventArgs e)
            {
                //GetReps();

                //Run worker
                if (!CreateRarBW.IsBusy)
                {
                    // This should be done once, maybe in the contructor. Bind to new event.
                    xXMLandRar.ReportProgress += new EventHandler<XMLandRar.ProgressArgs>(xXMLandRar_ReportProgress);

                    CreateRarBW.RunWorkerAsync();
                }
            }

            protected void xXMLandRar_ReportProgress(object sender, XMLandRar.ProgressArgs e)
            {
                // Call the UI backgroundworker
                CreateRarBW.ReportProgress(e.Percentage, e.Message);
            }

            //private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
            //{
            //    var worker = sender as BackgroundWorker;
            //    xXMLandRar.RarFiles(repSelected, worker);
            //}


            private void CreateRarBW_DoWork(object sender, DoWorkEventArgs e)
            {
                var worker = sender as BackgroundWorker;
                // Attach events to class
                xXMLandRar.OnDoWork += delegate(object o)
                {
                    // ...
                    MessageBox.Show("Hey ... Something is going on over there in the classLib .. " + o);
                };
                xXMLandRar.OnUpdate += delegate(object o, OnXmlandRarUpdateEventArgs args)
                {
                    // ...
                    //foreach (object oo in args)
                    {
                        MessageBox.Show("Hey ... Something is going on over there in the classLib .. Message is " + args.Message + " and Percentage is " + args.Percentage);
                    }
                };
                xXMLandRar.OnComplete += delegate(object o, XmlandRarCompletedEventArgs args)
                {
                    MessageBox.Show("Hey ... Something is going on over there in the classLib .. Canceled is " + args.Canceled + " and Finished is " + args.Finished);
                    // ...
                };
                xXMLandRar.RarFiles(repSelected);//, worker);
            }
        }
    }

使用系统；
使用System.Collections.Generic；
使用系统组件模型；
使用系统数据；
使用系统图；
使用System.Linq；
使用系统文本；
使用System.Windows.Forms；
名称空间线程示例
{
公共部分类Form1:Form
{
List repSelected=新建列表（）；
XMLandRar xXMLandRar=新的XMLandRar（）；
BackgroundWorker CreateRarBW=新的BackgroundWorker（）；
公共表格1（）
{
初始化组件（）；
repSelected=新列表{“asdf”、“asdfsd”、“h；ljj”}；
CreateRarBW.DoWork+=新的DoWorkEventHandler（CreateRarBW_DoWork）；
}
私有void Rarbtn_单击（对象发送者，事件参数e）
{
//GetReps（）；
//跑工
如果（！CreateRarBW.IsBusy）
{
//这应该做一次，可能在构造函数中。绑定到新事件。
xXMLandRar.ReportProgress+=新事件处理程序（xXMLandRar\u ReportProgress）；
CreateRarBW.RunWorkerAsync（）；
}
}
受保护的void xXMLandRar_ReportProgress（对象发送方，XMLandRar.ProgressArgs e）
{
//调用UI backgroundworker
CreateRarBW.ReportProgress（例如百分比、消息）；
}
//私有void CreateRarBW_DoWork（对象发送方，DoWorkEventArgs e）
//{
//var worker=发送方作为后台工作人员；
//xXMLandRar.rar文件（repSelected，worker）；