[英]How can i sum a changing values in int variable ? And what is the real number of directories on hard disk?
后台工作者 dowork 事件
string CurrentFileWithPath;
private void _FileProcessingWorker_DoWork(object sender, DoWorkEventArgs e)
{
try
{
DirectoryInfo[] MySubDirectories = (DirectoryInfo[])e.Argument;
for (int i = 0; i < MySubDirectories.GetLength(0); i++)
{
DirectoryInfo MySubDirectory = MySubDirectories[i];
List<FileInfo> l = new List<FileInfo>();
CountFiles(MySubDirectory, l);
int totalFiles = l.Count;
object[] CurrentStatus = new object[5];
CurrentStatus[3] = i.ToString();
CurrentStatus[4] = totalFiles.ToString();
_FileProcessingWorker.ReportProgress(0, CurrentStatus);
string CurrentDirectory = "Current Directory: " + MySubDirectory.Name;
foreach (FileInfo MyFile in l)
{
CurrentStatus = new object[5];
if (_FileProcessingWorker.CancellationPending)
{
e.Cancel = true;
return;
}
if (MyFile.Extension.ToLower() == ".cs" || MyFile.Extension.ToLower() == ".vb")
{
string CurrentFile = "Current File: " + MyFile.Name;
string CurrentFileWithPath = MyFile.FullName;
CurrentStatus[0] = CurrentDirectory;
CurrentStatus[1] = CurrentFile;
_FileProcessingWorker.ReportProgress(0, CurrentStatus);
List<string> Result = SearchInFile(CurrentFileWithPath, "static class FileShellExtension");
if (Result != null && Result.Count > 0)
{
CurrentStatus[2] = Result;
_FileProcessingWorker.ReportProgress(0, CurrentStatus);
}
}
}
}
}
catch (Exception err)
{
return;
}
Progresschanged 事件
private void _FileProcessingWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
if (typeof(object[]) == e.UserState.GetType())
{
object[] StatusMsg = (object[])e.UserState;
if (5 == StatusMsg.GetLength(0))
{
label2.Text = StatusMsg[4].ToString();
label4.Text = StatusMsg[3].ToString();
if (StatusMsg[0] != null && StatusMsg[1] != null)
{
lblCurrentDirectory.Text = StatusMsg[0].ToString();
lblStatus.Text = StatusMsg[1].ToString();
}
if (StatusMsg[2] != null)
{
if (StatusMsg[2].GetType() == typeof(List<string>))
{
List<string> l = (List<string>)StatusMsg[2];
for (int i = 0; i < l.Count; i++)
{
ListViewCostumControl.lvnf.Items.Add("Directory: " + lblCurrentDirectory.Text + "In File: " + lblStatus.Text + l[i]);
w.WriteLine("Directory: " + lblCurrentDirectory.Text + "In File: " + lblStatus.Text + l[i]);
}
}
}
}
}
}
CountFiles 方法
private void CountFiles(DirectoryInfo di, List<FileInfo> l)
{
try
{
l.AddRange(di.EnumerateFiles());
}
catch
{
string fff = "";
}
try
{
IEnumerable<DirectoryInfo> subDirs = di.EnumerateDirectories();
if (subDirs.Count() > 0)
{
foreach (DirectoryInfo dir in subDirs)
CountFiles(dir, l);
}
}
catch
{
string yyy = "";
}
}
SearchInFile 方法
private List<string> SearchInFile(string fileToSearch, string textToSearch)
{
List<string> l = new List<string>();
try
{
foreach (var line in File.ReadAllLines(fileToSearch))
{
if (line.Contains(textToSearch))
l.Add(line);
}
}
catch(Exception err)
{
string fff = err.ToString();
}
return l;
}
第一個問題是在獲取目錄數時:
private void btnProcess_Click(object sender, EventArgs e)
{
btnProcess.Enabled = false;
btnDirectory.Enabled = false;
btnCancel.Visible = true;
btnCancel.Enabled = true;
btnCancel.Text = "Cancel";
MyProgressBar.Visible = true;
_FileProcessingWorker = new BackgroundWorker();
_FileProcessingWorker.WorkerReportsProgress = true;
_FileProcessingWorker.WorkerSupportsCancellation = true;
_FileProcessingWorker.DoWork += new DoWorkEventHandler(_FileProcessingWorker_DoWork);
_FileProcessingWorker.ProgressChanged += new ProgressChangedEventHandler(_FileProcessingWorker_ProgressChanged);
_FileProcessingWorker.RunWorkerCompleted += new RunWorkerCompletedEventHandler(_FileProcessingWorker_RunWorkerCompleted);
string BasePath = lblDirectoryName.Text;
DirectoryInfo MyDirectory = new DirectoryInfo(BasePath);
DirectoryInfo[] MySubDirectories = MyDirectory.GetDirectories();
int SubDirectoryCount = MySubDirectories.GetLength(0);
MyProgressBar.Minimum = 0;
MyProgressBar.Step = 1;
MyProgressBar.Maximum = SubDirectoryCount;
MyProgressBar.Value = MyProgressBar.Minimum;
_LastCounter = 0;
_FileProcessingWorker.RunWorkerAsync(MySubDirectories);
}
在單擊按鈕中,我正在獲取子目錄。 但是有兩個問題。 在 dowork 事件中,當我在這條線上放置一個斷點時:
for (int i = 0; i < MySubDirectories.GetLength(0); i++)
我看到它包含 409 個目錄。 但是當我在 dowork 事件中向 label4 報告目錄數時
CurrentStatus[3] = i.ToString();
在 progresschanged 事件中
label4.Text = StatusMsg[3].ToString();
我在label4 408目錄上看到最后。 而在 D:(在這種情況下,我正在處理我的 D:\\ 目錄)當我選擇 Windows 資源管理器中的所有目錄時,右鍵單擊和屬性我只看到 405 個目錄。 那么真正的目錄數是多少? 我應該在 label4 中顯示什么以及多少目錄?
第二個問題是當我報告 dowork 事件中的文件數時:
CurrentStatus[4] = totalFiles.ToString();
並且 in progresschanged 事件將其顯示在 label2 上:
label2.Text = StatusMsg[4].ToString();
問題是 totalFiles 值一直在變化,一旦它是 2 然后它是 768 然后它是 66 然后是 8987 但我想要做的是以某種方式實時求和 totalFiles 中的值所以在 label2 中我會第一次看到例如: 2 然后是 770 然后是 (770+66) 所以我會在 label2 816 中看到......總是看到到目前為止所有值的總和。
最后一個問題是這個循環的progresschanged事件:
for (int i = 0; i < l.Count; i++)
{ ListViewCostumControl.lvnf.Items.Add("Directory: " + lblCurrentDirectory.Text + "In File: " + lblStatus.Text + l[i]);
w.WriteLine("Directory: " + lblCurrentDirectory.Text + "In File: " + lblStatus.Text + l[i]);
}
此時在另一個后台工作程序(例如 backgroundworker2 dowork 事件)中的程序中取出並進行此循環可能是邏輯上的某種方式? 如果是這樣怎么辦? 問題是當循環有許多項目要添加到 listView 時,它會使程序掛起直到循環完成。
每次執行
CurrentStatus[4] = totalFiles.ToString();
您正在將狀態值重置為當前處理目錄中的文件數。 這就是為什么這個數字不斷反彈的原因。 相反,我建議:
int thisDirFiles;
thisDirFiles = l.Count;
totalFiles += thisDirFiles;
CurrentStatus[4] = totalFiles.ToString();
現在,當您報告進度時,CurrentStatus[4] 將具有運行總數。
對於您的第二個問題,在我看來,您在報告進展時嘗試做的太多了。 操作 ListView 的成本可能很高,而且您更新 ListView 所花費的時間可能比處理目錄的時間要多,因此您的機器似乎死機了。
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