У меня есть класс с интерфейсом INotifyPropertyChanged. Есть свойство с названием Total Progress.
У меня есть форма с индикатором выполнения. Я хочу отправить уведомления об изменении свойства TotalProgress на этот индикатор выполнения и установить его значение.
Нужно ли мне также перехватывать PropertyChangedEvent в форме?
Изменить: код формы WPF
using System.ComponentModel;
using System.Windows;
using System.Windows.Data;
using System;
using System.Windows.Threading;
namespace SUpdater
{
/// <summary>
/// Interaction logic for MainWindow.xaml
/// </summary>
public partial class MainWindow : Window
{
BackgroundWorker bw = new BackgroundWorker();
DownloadFile FileDownloadClass = new DownloadFile();
public MainWindow()
{
InitializeComponent();
bw.WorkerReportsProgress = true;
bw.WorkerSupportsCancellation = true;
bw.DoWork += new DoWorkEventHandler(bw_DoWork);
bw.ProgressChanged += new ProgressChangedEventHandler(bw_ProgressChanged);
bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
progressBar1.SetBinding(System.Windows.Controls.ProgressBar.ValueProperty, new Binding("TotalPercentCompleted"));
progressBar1.DataContext = FileDownloadClass;
FileDownloadClass.PropertyChanged +=new PropertyChangedEventHandler(FileDownloadClass_PropertyChanged);
}
private void bw_DoWork(object sender, DoWorkEventArgs e)
{
FileDownloadClass.DownloadFiles();
if ((bw.CancellationPending == true))
e.Cancel = true;
else
{
bw.ReportProgress(FileDownloadClass.TotalPercentCompleted);
}
}
private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
if ((e.Cancelled == true))
{
this.lblConnectionStatus.Content = " Download Canceled!";
}
else if (!(e.Error == null))
{
this.lblConnectionStatus.Content = ("Error: " + e.Error.Message);
}
else
{
this.lblConnectionStatus.Content = "Done!";
}
}
private void FileDownloadClass_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
}
private void bw_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
lblKbCompleted.Content = e.ProgressPercentage.ToString();
}
private void Window_Loaded(object sender, RoutedEventArgs e)
{
bw.RunWorkerAsync();
}
}
}
Изменить: Код класса DownloadFile
sealed class DownloadFile:INotifyPropertyChanged
{
#region Private Fields
// These fields hold the values for the public properties.
private int progressBarValue = 0;
private int totalKbCompleted = 0;
private int totalBytesReceived = 0;
private int remoteFileSize = 0;
private string fileName = String.Empty;
private string statusMessage = String.Empty;
#endregion
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String info)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(info));
}
}
#region Public Properties
public int TotalKbCompleted
{
get { return this.totalKbCompleted; }
set
{
if (value != this.totalKbCompleted)
{
this.totalKbCompleted = value/1024;
NotifyPropertyChanged("TotalKbCompleted");
}
}
}
public int TotalBytesReceived
{
get { return this.totalBytesReceived; }
set
{
if (value != this.totalBytesReceived)
{
this.totalBytesReceived = value;
NotifyPropertyChanged("TotalBytesReceived");
}
}
}
public int RemoteFileSize
{
get { return this.remoteFileSize; }
set
{
if (value != this.remoteFileSize)
{
this.remoteFileSize = value;
NotifyPropertyChanged("RemoteFileSize");
}
}
}
public string CurrentFileName
{
get { return this.fileName; }
set
{
if (value != this.fileName)
{
this.fileName = value;
NotifyPropertyChanged("CurrentFileName");
}
}
}
public string StatusMessage
{
get { return this.statusMessage; }
set
{
if (value != this.statusMessage)
{
this.statusMessage = value;
NotifyPropertyChanged("StatusMessage");
}
}
}
#endregion
public Int16 DownloadFiles()
{
try
{
statusMessage = "Attempting Connection with Server";
DoEvents();
// create a new ftpclient object with the host and port number to use
FtpClient ftp = new FtpClient("mySite", 21);
// registered an event hook for the transfer complete event so we get an update when the transfer is over
//ftp.TransferComplete += new EventHandler<TransferCompleteEventArgs>(ftp_TransferComplete);
// open a connection to the ftp server with a username and password
statusMessage = "Connected. Authenticating ....";
ftp.Open("User Name", "Password");
// Determine File Size of the compressed file to download
statusMessage = "Getting File Details";
RemoteFileSize = Convert.ToInt32(ftp.GetFileSize("myFile.exe"));
ftp.TransferProgress += new EventHandler<TransferProgressEventArgs>(ftp_TransferProgress);
statusMessage = "Download from Server";
ftp.GetFile("myFile.exe", "E:\\Test\\myFile.exe", FileAction.Create);
// close the ftp connection
ftp.Close();
statusMessage = "Download Complete";
return 1;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message.ToString());
return 0;
}
}
private void ftp_TransferProgress(object sender, TransferProgressEventArgs e)
{
totalBytesReceived = Convert.ToInt32(e.BytesTransferred.ToString());
totalKbCompleted = Convert.ToInt32(totalKbCompleted + Convert.ToInt32(totalBytesReceived));
progressBarValue = totalKbCompleted;
}
}
DownloadFile
, просто добавьте реализациюTotalPercentCompleted
и оформление класса - person Jalal Said   schedule 27.07.2011TotalKbCompleted
нетTotalPercentCompleted
. поэтому измените строку привязки на:progressBar1.SetBinding(System.Windows.Controls.ProgressBar.ValueProperty, new Binding("TotalKbCompleted"));
2. Вы обновляетеtotalKbCompleted
вместоTotalKbCompleted
, поэтомуPropertyChanged
не сработает. - person Jalal Said   schedule 27.07.2011