后台工作线程报告来自外部类的进度
本文关键字：外部 工作 线程 报告 后台 | 更新日期: 2023-09-27 18:35:01
我有一个工作解决方案，可以将进度和文本报告到进度条和应用程序主窗体上的标签。我现在已经将我的 worker 方法移动到一个类中，以便它们可以跨多个表单等访问。
在 worker 方法中BW.ReportProgress()语句，这些语句将进度和文本推送回主窗体中的 BackgroundWorker 。
为了给出更好的主意，这里是文件布局：
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();
}
然后是我新创建的类，它包含所有工作线程方法，并将进度推送到主窗体。
XMLandRar.cs
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);
}
}
}我遇到的问题是，在XMLandRar类中，CreateRarBW 无法识别(显然( - 如何在应用程序的主屏幕中对 BW 进行ReportProgress调用？
在XMLandRar类中创建一个可以订阅的事件。
这样，XMLandRar类就不需要知道或关心 UI 或进度条，它只关心在有人愿意听时发送消息。而且也可以有多个订阅者(假设您是否要向后台工作者和日志报告，也许(
例：
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 });
}
}
}
}
DoWork回调中的sender对象是调用此回调的BackgroundWorker实例。
这样就可以使用该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
public class XMLandRar
{
public void RarFiles(List repSelected, BackgroundWorker worker)
{
// ...
}
}
或者将BackgroundWorker实例设置为XMLandRar的类属性。
public class XMLandRar
{
protected BackgroundWorker mWorker;
public XMLandRar(BackgroundWorker worker) {
mWorker = BackgroundWorker;
}
public void RarFiles(List repSelected)
{
// Do something with {mWorker}
}
}
或者如注释中所述，使用 XMLandRar 类中的事件。
XMLandRar.cs
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);
}
希望没有错别字，因为我在办公室。
我已经修复了提交的代码中的错误并清理了它......这是一个工作示例，它将帮助那些可能无法理解代码的人，因为它被破坏了......虽然我想说的是，清理和增强后代码的意图和功能非常好。
这是工作代码，可以让您开始在项目中使用 backGroundWorker 线程来满足您需要的任何需求。
只需修改此方法 -
public void RarFiles(List<string> repSelected)
做你需要的任何工作。您还必须修改您计划使用的参数。即您可能需要一个数据表或一些自定义对象...您可以修改
public class OnXmlandRarUpdateEventArgs : EventArgs
为了您的需要..这样当你收到回调时..你可以用对这些项目所做的更改来更新你的主UI表单。
你可能需要做一些调整......但你明白我的意思。
这是表单代码..不要忘记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);
}
}
}
这是类代码。您可以在当前项目中创建一个类...请记住，CreateRarBW 对象是一个 BackGroundWorker 实例...(上面未包含。
using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.IO;
using System.Diagnostics;
using System.Threading;
namespace ThreadSample
{
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 OnXmlandRarUpdateEventArgs(int perc) : this(perc, "")
{
}
public OnXmlandRarUpdateEventArgs(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 // : BackgroundWorker
{
// 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 event OnXmlandRarDoWorkHandler OnDoWork;
public event OnXmlandRarUpdateHandler OnUpdate;
public event OnXmlandRarCompleteHandler OnComplete;
public void RarFiles(List<string> 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(int perc)
{
if (OnUpdate != null)
{
OnUpdate(this, new OnXmlandRarUpdateEventArgs(perc));
}
}
private void TriggerUpdate(int 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));
}
}
}
}