我在Form1中有这个功能,这个功能很好,我的想法就是从一个大的xml文件中检索一些文本。所以在Form1构造中我做了:
r = new StreamReader(@"D:\Deponia_Work\Deponia Extracted Files\000004aa.xml");
f = r.ReadToEnd();
r.Close();
变量f是字符串。
现在我在Form1中使用了这个函数,我称之为test(),它正在从大000004aa.xml文件中查找/提取文本。
private void test()
{
int countFiles = 0;
byte[] a;
string startTag = "T256=\"";
string endTag = "\"";
int index = 0;
int startTagWidth = startTag.Length;
int endTagWidth = endTag.Length;
int fileLength = f.Length;
w = new StreamWriter(@"d:\testingdeponias.txt");
while (true)
{
if (index > f.LastIndexOf(startTag))
{
break;
}
int startTagIndex = f.IndexOf(startTag, index);
int stringIndex = startTagIndex + startTagWidth;
index = stringIndex;
int endTagIndex = f.IndexOf(endTag, index);
int stringLength = endTagIndex - stringIndex;
if (stringLength == 0)
{
}
else
{
string test = f.Substring(stringIndex, stringLength);
if (test.Contains("<pa>"))
{
string t = "<pa>";
int y = t.Length;
string test1 = test.Substring(0, stringLength - y);
listBox1.Items.Add(test1);
w.WriteLine(test1);
}
//else
// {
listBox1.Items.Add(test);
w.WriteLine(test);
// }
}
}
w.Close();
}
然后我向Form1添加了一个新的backgroudnworker2事件:
这是DoWork活动:
private void backgroundWorker2_DoWork(object sender, DoWorkEventArgs e)
{
BackgroundWorker worker2 = sender as BackgroundWorker;
lists1.extractTextDeponia(worker2, backgroundWorker2, listBox1, textBox1,f, w, e);
}
这是我启动backgroundworker的按钮点击事件:
private void button8_Click(object sender, EventArgs e)
{
backgroundWorker2.RunWorkerAsync();
}
在新类中,我创建了一个新的函数公共函数,它从Form1中获取一些变量。
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;
using System.IO;
using System.Web;
using System.Text.RegularExpressions;
using System.Xml;
using System.Xml.Linq;
namespace List_Words
{
class Lists
{
public void List_Words()
{
}
public void extractTextDeponia(BackgroundWorker worker, BackgroundWorker backgroundWorker2, ListBox lbox , TextBox tbox , StreamWriter streamW , string read, DoWorkEventArgs e)
{
我的问题是如何更改并将test()函数从Form1转换为新类到新函数中,以便它也可以与backgroundworker2一起使用?
我试图在那里使用/添加FileStream并添加了一个循环读取的循环,但它没有用。
**这是具有函数的新类,因为它是Form1中的test()**
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;
using System.IO;
using System.Web;
using System.Text.RegularExpressions;
using System.Xml;
using System.Xml.Linq;
namespace List_Words
{
class Lists
{
public void List_Words()
{
}
public void extractTextDeponia(BackgroundWorker worker, BackgroundWorker backgroundWorker2, ListBox lbox , TextBox tbox , StreamWriter streamW , string read, DoWorkEventArgs e)
{
string startTag = "T256=\"";
string endTag = "\"";
int index = 0;
int startTagWidth = startTag.Length;
int endTagWidth = endTag.Length;
int fileLength = read.Length;
using (var fs = new FileStream(@"D:\Deponia_Work\Deponia Extracted Files\000004aa.xml", FileMode.Open, FileAccess.Read))
{
using (var h = new StreamReader(fs))
{
string line;
line = h.ReadLine();
while ((line = h.ReadLine()) != null)
{
if (worker.CancellationPending == true)
{
e.Cancel = true;
break;
}
else
{
int percent = (int)(fs.Position * 100 / fs.Length);
backgroundWorker2.ReportProgress(percent);
if (index > read.LastIndexOf(startTag))
{
break;
}
int startTagIndex = read.IndexOf(startTag, index);
int stringIndex = startTagIndex + startTagWidth;
index = stringIndex;
int endTagIndex = read.IndexOf(endTag, index);
int stringLength = endTagIndex - stringIndex;
if (stringLength == 0)
{
}
else
{
line = read.Substring(stringIndex, stringLength);
if (line.Contains("<pa>"))
{
string t = "<pa>";
int y = t.Length;
string test1 = line.Substring(0, stringLength - y);
if (lbox.InvokeRequired)
{
lbox.Invoke(new MethodInvoker(delegate { lbox.Items.Add(test1); }));
}
//w.WriteLine(test1);
line = h.ReadLine();
if (tbox.InvokeRequired)
{
tbox.Invoke(new MethodInvoker(delegate { tbox.Text = test1; }));
}
}
//else
// {
if (lbox.InvokeRequired)
{
lbox.Invoke(new MethodInvoker(delegate { lbox.Items.Add(line); }));
}
//w.WriteLine(line);
if (tbox.InvokeRequired)
{
tbox.Invoke(new MethodInvoker(delegate { tbox.Text = line; }));
}
// }
}
}
}
}
}
streamW = new StreamWriter(@"d:\testingdeponias.txt");
streamW.AutoFlush = true;
streamW.Write(read);
streamW.Close();
}
}
}
在form1中我称之为:
BackgroundWorker worker2 = sender as BackgroundWorker;
lists1.extractTextDeponia(worker2, backgroundWorker2, listBox1, textBox1,w, f, e);
w是流编写器f是字符串,e是backgroundowrker2 DoWork e变量 正如我在上面展示的那样,我在Form1构造函数中使用f来读取大的xml文件,但我也在新的类和函数中使用FileStream做了一件乱七八糟的事情。 **
答案 0 :(得分:0)
可能有所帮助的一点是改变你的编程思维方式。考虑对这些数据实体的数据实体和操作,而不是考虑表单和事件,您可以使用服务类型模式。
所以你要做的就是创建一个服务类,它会做你想做的事情。由于您正在使用后台工作程序,因此我将其创建为实例类而不是静态类。
public class FileWorkerService
{
private BackgroundWorker _worker;
public FileWorkerService()
{
_worker = new BackgroundWorker();
}
public void ReadFileAndProcessIt()
{
if (!_worker.IsBusy)
{
_worker.RunWorkerAsync();
}
}
}
现在,只需按照之前的事件连接_worker,您的服务类就可以开始工作了。
为了让它做某事,你只需创建一个实例并调用启动worker的函数。
所以在你的表单按钮上点击你会...
private void button8_Click(object sender, EventArgs e)
{
var newService = new FileWorkerService();
newService.ReadFileAndProcessIt();
}
=================编辑============================= ===== - 添加了如何从服务中更新后台工作程序的进度。 &LT;&LT;&LT; ================================================== ======
在FileWorkerService类中
public void SetWorkerProgress(int currentValue)
{
_worker.ReportProgress(currentValue);
}
要在课堂外打电话,你可以从主表格开始......
newService.SetWorkerProgress(whatever);