using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Security.AccessControl;
using System.Security.Principal;
using System.Runtime.InteropServices;
namespace Search_Text_In_Files
{
public partial class Form1 : Form
{
StreamWriter w = new StreamWriter(@"e:\textresults.txt");
ProgressBarWithText pbt = new ProgressBarWithText();
public Form1()
{
InitializeComponent();
pbt.Size = new Size(984, 23);
pbt.Location = new Point(12, 358);
this.Controls.Add(pbt);
backgroundWorker1.RunWorkerAsync();
}
bool result = false;
public List<string> FindLines(string DirName, string TextToSearch)
{
int counter = 0;
List<string> findLines = new List<string>();
DirectoryInfo di = new DirectoryInfo(DirName);
List<FileInfo> l = new List<FileInfo>();
CountFiles(di, l, count =>
{
backgroundWorker1.ReportProgress(count, "Counting Files");
});
int totalFiles = l.Count;
int countFiles = 0;
if (di != null && di.Exists)
{
if (CheckFileForAccess(DirName) == true)
{
foreach (FileInfo fi in l)
{
backgroundWorker1.ReportProgress((int)((double)countFiles / totalFiles * 100.0), fi.Name);
countFiles++;
System.Threading.Thread.Sleep(1);
if (string.Compare(fi.Extension, ".cs", true) == 0)
{
using (StreamReader sr = fi.OpenText())
{
string s = "";
while ((s = sr.ReadLine()) != null)
{
if (s.Contains(TextToSearch))
{
counter++;
findLines.Add(s);
result = true;
backgroundWorker1.ReportProgress(0, fi.FullName);
}
}
}
}
}
}
}
return findLines;
}
private void CountFiles(DirectoryInfo di, List<FileInfo> l, Action<int> CurrentCount) {
foreach (DirectoryInfo dir in di.GetDirectories())
CountFiles(dir, l, currentCount=> {
CurrentCount(l.Count);
});
}
private bool CheckForAccess(string PathName)
{
if (File.Exists(PathName) == true)
return CheckFileForAccess(PathName);
if (Directory.Exists(PathName) == true)
return CheckFolderForAccess(PathName);
return false;
}
private bool CheckFileForAccess(string FileName)
{
FileSecurity fs = new FileSecurity(FileName, AccessControlSections.Access);
if (fs == null)
return false;
AuthorizationRuleCollection TheseRules = fs.GetAccessRules(true, true, typeof(NTAccount));
if (TheseRules == null)
return false;
return CheckACL(TheseRules);
}
private bool CheckFolderForAccess(string FolderName)
{
DirectoryInfo di = new DirectoryInfo(FolderName);
if (di == null)
return false;
DirectorySecurity acl = di.GetAccessControl(AccessControlSections.Access);
if (acl == null)
return false;
AuthorizationRuleCollection TheseRules = acl.GetAccessRules(true, true, typeof(NTAccount));
if (TheseRules == null)
return false;
return CheckACL(TheseRules);
}
private bool CheckACL(AuthorizationRuleCollection TheseRules)
{
foreach (FileSystemAccessRule ThisRule in TheseRules)
{
if ((ThisRule.FileSystemRights & FileSystemRights.Read) == FileSystemRights.Read)
{
if (ThisRule.AccessControlType == AccessControlType.Deny)
return false;
}
}
return true;
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
FindLines(@"d:\c-sharp", "FileShellExtension");
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
if (e.UserState.ToString() == "Counting Files")
label2.Text = e.UserState.ToString();
pbt.Value = e.ProgressPercentage;
pbt.Text = e.ProgressPercentage.ToString() + "%";
pbt.Invalidate();
label2.Text = e.UserState.ToString();
if (result == true)
{
listView1.Items.Add(e.UserState.ToString());
result = false;
}
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if (e.Cancelled == true)
{
}
else if (e.Error != null)
{
}
else
{
}
}
public class ProgressBarWithText : ProgressBar
{
const int WmPaint = 15;
SizeF TextSize;
PointF TextPos;
bool dontpaint = false;
public ProgressBarWithText()
{
this.DoubleBuffered = true;
this.TextChanged += ProgressBarWithText_TextChanged;
this.SizeChanged += ProgressBarWithText_SizeChanged;
}
public override string Text
{
get { return base.Text; }
set { base.Text = value; }
}
void RecalcTextPos()
{
if (this.IsDisposed == true)
return;
if (string.IsNullOrEmpty(base.Text))
return;
using (var graphics = Graphics.FromHwnd(this.Handle))
{
TextSize = graphics.MeasureString(base.Text, this.Font);
TextPos.X = (this.Width / 2) - (TextSize.Width / 2);
TextPos.Y = (this.Height / 2) - (TextSize.Height / 2);
}
}
void ProgressBarWithText_SizeChanged(object sender, EventArgs e)
{
RecalcTextPos();
}
void ProgressBarWithText_TextChanged(object sender, EventArgs e)
{
RecalcTextPos();
}
protected override void WndProc(ref System.Windows.Forms.Message m)
{
base.WndProc(ref m);
if (dontpaint == false)
{
switch (m.Msg)
{
case WmPaint:
using (var graphics = Graphics.FromHwnd(Handle))
graphics.DrawString(base.Text, base.Font, Brushes.Black, TextPos.X, TextPos.Y);
break;
}
}
}
protected override CreateParams CreateParams
{
get
{
CreateParams result = base.CreateParams;
result.ExStyle |= 0x02000000; // WS_EX_COMPOSITED
return result;
}
}
}
}
}
FindLines方法我将其称为dowork事件：
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
FindLines(@"d:\c-sharp", "FileShellExtension");
}
在FindLines方法中，我在两个地方使用reportprogress：
CountFiles(di, l, count =>
{
backgroundWorker1.ReportProgress(count, "Counting Files");
});
int totalFiles = l.Count;
int countFiles = 0;
if (di != null && di.Exists)
{
if (CheckFileForAccess(DirName) == true)
{
foreach (FileInfo fi in l)
{
backgroundWorker1.ReportProgress((int)((double)countFiles / totalFiles * 100.0), fi.Name);
但它永远不会进入progresschanged事件。 我在设计器中检查了属性：WorkerReportsProgress设置为true。