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嗨，这里有另一个问题的跟进

这是摘要

在 c# 中的 wpf 应用程序中，我有一个更新远程数据库的漫长过程。为此，我创建了一个后台工作人员。但是，我希望在数据库更新例程期间打开一个窗口并运行一个进度条。我在主窗口上将进度条设置为 Indeterminate 的所有尝试都失败了，因为我的进度条上的“嗖嗖”效果直到我的后台工作线程完成后才开始在我的主窗口上运行

任何有帮助的人和这篇文章在这里我设法在不同的线程中打开一个新窗口并运行后台工作程序并让进度条正确“摆动”并且后台工作运行完成。但是，我的新问题是

后台工作完成后，如何关闭进度条窗口（称为 progressDialog）？

请记住，我对此很陌生，代码示例会非常受欢迎，我认为，但我不确定我是否要从后台工作人员 RunWorkerCompleted 代码区域关闭进度条窗口

这是我的代码

我将后台工作人员设置为

  public partial class MainWindow : Window
{
    //Declare background workers
    BackgroundWorker bwLoadCSV = new BackgroundWorker();


    //Declare class variables
    // some stuff

    public MainWindow()
    {
        InitializeComponent();
        //assign events to backgroundworkers
        bwLoadCSV.WorkerReportsProgress = true;
        bwLoadCSV.WorkerSupportsCancellation = true;
        bwLoadCSV.DoWork += new DoWorkEventHandler(bwLoadCSV_DoWork);
        bwLoadCSV.ProgressChanged += new ProgressChangedEventHandler(bwLoadCSV_ProgressChanged);
        bwLoadCSV.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bwLoadCSV_RunWorkerCompleted);
      }
  }

我在按钮单击事件上运行事件；

private void CSV_Load_Click(object sender, RoutedEventArgs e)
    ///Function to read csv into datagrid
    ///
    {
        //Turn Cursor to wait
        System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.WaitCursor;
        Thread backgroundThread = new Thread(
    new ThreadStart(() =>
    {
        ProgressDialog progressDialog = new ProgressDialog();
        progressDialog.tbEvent.Text = "Loading CSV Data....";
        progressDialog.progressBar1.IsIndeterminate = true;
        progressDialog.ShowDialog();
    }

));
        backgroundThread.SetApartmentState(ApartmentState.STA);
        backgroundThread.Start();

        //Test connection to sql server
        if (CHHoursDataProvider.IsDatabaseOnline() == false)
        {
            System.Windows.Forms.MessageBox.Show("Can not establish contact with sql server" + "\n" + "Contact IT", "Connection Error");
            //Set UI picture
            return;
        }
        //Set a control to update the user here
        tbLoadDgStat.Visibility = Visibility.Visible;

        //tbLoadDgStat.Text = "Getting data templete from Database...";
        string FilePath = txFilePath.Text;
        if (bwLoadCSV.IsBusy != true)
        {
            //load the context object with parameters for Background worker
            bwCSVLoadContext Context = new bwCSVLoadContext();
            Context.Site = cBChSite.Text;
            Context.FilePath = txFilePath.Text;
            Context.FileName = fileTest;
            Context.Wageyear = cbWageYear.Text;
            Context.Startdate = ((DateTime)dpStartDate.SelectedDate);
            Context.Enddate = ((DateTime)dpEndDate.SelectedDate);

            bwLoadCSV.RunWorkerAsync(Context);                
         }
    }

我的进度条表单progressDialog xaml和类是这样的；

<Window x:Class="Test_Read_CSV.ProgressDialog"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="Progress Dialog" Height="115" Width="306" Name="ProgressPopup">
<Grid>
    <ProgressBar Height="31" HorizontalAlignment="Left" Margin="12,33,0,0" Name="progressBar1" VerticalAlignment="Top" Width="250" x:FieldModifier="public" />
    <TextBox Height="23" HorizontalAlignment="Left" Margin="7,4,0,0" Name="tbEvent" VerticalAlignment="Top" Width="254" IsReadOnly="True" IsEnabled="False" x:FieldModifier="public" />
</Grid>


class is
 public partial class ProgressDialog : Window
{
    public ProgressDialog()
    {
        WindowStartupLocation = WindowStartupLocation.CenterScreen;
        InitializeComponent();
        progressBar1.IsIndeterminate = true;

    }

我的后台工作人员完成的代码是

  private void bwLoadCSV_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        bwCSVLoadContext Context = e.Result as bwCSVLoadContext;
        Thread.Sleep(5000);
        if ((e.Cancelled == true))
        {

            this.tbLoadDgStat.Text = "Canceled!";
            System.Threading.Thread.Sleep(1000);

            System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
            tbLoadDgStat.Visibility = Visibility.Hidden;
        }

        else if (!(e.Error == null))
        {
            //this.tbProgress.Text = ("Error: " + e.Error.Message);

        }

        else
        {
            if (Context.LoadResult == true)
            {
                this.dgCSVData.DataContext = oTable.DefaultView;
                btUpload.IsEnabled = true;
            }

            **//close the progressbar window some how here!!!**


            //On the main window
            this.tbLoadDgStat.Text = "Complete";
            progressBar1.Value = 100;


            System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;
            tbLoadDgStat.Visibility = Visibility.Hidden;
        }



        System.Windows.Forms.Cursor.Current = System.Windows.Forms.Cursors.Default;

    }
4

1 回答 1

0

在进度页面中做背景
如果您需要传递（并返回）一个对象，那么在进度 ctor 中这样做

private void click(object sender, RoutedEventArgs e)
{
    Progress progressDialog = new Progress();
    progressDialog.Show();
    if (progressDialog != null) progressDialog = null;
}

namespace BackGroundWorkerShowDialog
{
    /// <summary>
    /// Interaction logic for Progress.xaml
    /// </summary>
    public partial class Progress : Window
    {
        BackgroundWorker bwLoadCSV = new BackgroundWorker();
        public Progress()
        {
            InitializeComponent();
            //assign events to backgroundworkers
            bwLoadCSV.WorkerReportsProgress = true;
            bwLoadCSV.WorkerSupportsCancellation = true;
            bwLoadCSV.DoWork += new DoWorkEventHandler(backgroundWorker1_DoWork);
            bwLoadCSV.ProgressChanged += new ProgressChangedEventHandler(backgroundWorker1_ProgressChanged);
            bwLoadCSV.RunWorkerCompleted += new RunWorkerCompletedEventHandler(backgroundWorker1_RunWorkerCompleted);
            if (bwLoadCSV.IsBusy != true)
            {
                // Start the asynchronous operation.
                bwLoadCSV.RunWorkerAsync();
            }

        }

        private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {
            BackgroundWorker worker = sender as BackgroundWorker;
            for (int i = 1; i <= 10; i++)
            {
                if (worker.CancellationPending == true)
                {
                    e.Cancel = true;
                    break;
                }
                else
                {
                    // Perform a time consuming operation and report progress.
                    System.Threading.Thread.Sleep(500);
                    worker.ReportProgress(i * 10);
                }
            }
        }

        private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {

            if (e.Cancelled == true)
            {
                //resultLabel.Text = "Canceled!";
            }
            else if (e.Error != null)
            {
                //resultLabel.Text = "Error: " + e.Error.Message;
            }
            else
            {
                //resultLabel.Text = "Done: " + e.Error.Message;
            }
            this.Close();
        }

        private void backgroundWorker1_ProgressChanged(object sender,
            ProgressChangedEventArgs e)
        {
            this.tbProgress.Text = e.ProgressPercentage.ToString();
        }
    }

}
于 2013-10-14T14:58:51.810 回答