Question

我只是在WPF中使用ProgressBar进行新的woking。我有这样的用户控件：

public partial class Import : UserControl
{

    public Import()
    {
        InitializeComponent();
    }

    private void filePickerButton_Click(object sender, RoutedEventArgs e)
    {
        // Create the OpenFIleDialog object
        Microsoft.Win32.OpenFileDialog openPicker = new Microsoft.Win32.OpenFileDialog();

        // Add file filters
        // We are using excel files in this example
        openPicker.DefaultExt = ".xslt";
        openPicker.Filter = "Excel Files|*.xls;*.xlsx;*.xlsm";

        // Display the OpenFileDialog by calling ShowDialog method
        Nullable<bool> result = openPicker.ShowDialog();

        // Check to see if we have a result 
        if (result == true)
        {
            // Application now has read/write access to the picked file
            filePathTextBox.Text = openPicker.FileName.ToString();
        }
    }

    private void btn_Import_Click(object sender, RoutedEventArgs e)
    {

        //import all data from excel file to datatable
        Workbook wb = new Workbook(filePathTextBox.Text);

        // Accessing the worksheet in the Excel file
        Worksheet worksheetPro = wb.Worksheets[1];

        Worksheet worksheetCat = wb.Worksheets[0];

        // Exporting all data by ExportDataTable
        DataTable dataTablePro = worksheetPro.Cells
            .ExportDataTable(1, 0, worksheetPro.Cells.Rows.Count - 1, worksheetPro.Cells.Columns.Count, false);

        DataTable dataTableCat = worksheetCat.Cells
            .ExportDataTable(1, 0, worksheetCat.Cells.Rows.Count - 1, worksheetCat.Cells.Columns.Count, false);

        //dump data from datatable to SQL server
        string connectionString = @"Data Source=DESKTOP-L6OBVA4\SQLEXPRESS;Initial Catalog=QLDB;Integrated Security=True";
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            using (SqlBulkCopy bulkCopy = new SqlBulkCopy(connection))
            {
                //mapping columns of Datatable with the name of DB
                bulkCopy.ColumnMappings.Add(dataTablePro.Columns[0].ColumnName, "Tên");
                bulkCopy.ColumnMappings.Add(dataTablePro.Columns[1].ColumnName, "Giá");
                bulkCopy.ColumnMappings.Add(dataTablePro.Columns[2].ColumnName, "Số Lượng");
                bulkCopy.ColumnMappings.Add(dataTablePro.Columns[3].ColumnName, "Miêu Tả");

                //set the destination table name in DB will be affected
                bulkCopy.DestinationTableName = "dbo.Products";

                try
                {
                    //coppy all rows from nominated datatable and dump it to DB
                    bulkCopy.WriteToServer(dataTablePro);
                    dataTablePro.Clear();
                    using (SqlBulkCopy bulkCopyCat = new SqlBulkCopy(connection))
                    {
                        bulkCopyCat.ColumnMappings.Add(dataTableCat.Columns[0].ColumnName, "Loại");
                        bulkCopyCat.DestinationTableName = "dbo.Categories";
                        bulkCopyCat.WriteToServer(dataTableCat);
                        dataTableCat.Clear();
                        MessageBox.Show("Success!!!");
                    }                          
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

    }
}

此用户控件的用途是：选择一个excel文件，然后将所有数据导入datatable，最后将所有数据转储到SQL Server。我需要为从数据表到SQL服务器的转储操作创建一个处理栏，因为我认为这需要很长时间。接下来，我创建了一个Process bar窗口：

public partial class ProgressBar : Window
{
    public ProgressBar()
    {
        InitializeComponent();
    }

    private void Window_ContentRendered(object sender, EventArgs e)
    {
        BackgroundWorker worker = new BackgroundWorker();
        worker.WorkerReportsProgress = true;
        worker.DoWork += worker_DoWork;
        worker.ProgressChanged += worker_ProgressChanged;

        worker.RunWorkerAsync();
    }

    void worker_DoWork(object sender, DoWorkEventArgs e)
    {
        for (int i = 0; i < 100; i++)
        {
            (sender as BackgroundWorker).ReportProgress(i);
            //do my operation here
        }
    }

    void worker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        pbStatus.Value = e.ProgressPercentage;
    }
}

你可以看到上面的代码段，我有一个名为的方法：

worker_DoWork（）

这是我计划进行操作的地方。最后，我想从用户控件中获取这些代码行，然后将其放入worker_DoWork（）中，因为我认为这些行需要时间来处理：

try
                {
                    //coppy all rows from nominated datatable and dump it to DB
                    bulkCopy.WriteToServer(dataTablePro);
                    dataTablePro.Clear();
                    using (SqlBulkCopy bulkCopyCat = new SqlBulkCopy(connection))
                    {
                        bulkCopyCat.ColumnMappings.Add(dataTableCat.Columns[0].ColumnName, "Loại");
                        bulkCopyCat.DestinationTableName = "dbo.Categories";
                        bulkCopyCat.WriteToServer(dataTableCat);
                        dataTableCat.Clear();
                        MessageBox.Show("Success!!!");
                    }                          
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }

我该怎么做才能得到它？我听说过代表和事件可以给我一个选择，但我自己找不到它。谢谢！

Answer 1

如果您不关心进度对话框的多个实例。然后尝试这样的事情：

<强> Import.xaml：

    <Grid>
        <Button x:Name="filePicker" Content="ClickMe" Click="filePicker_Click" DockPanel.Dock="Top"/>
        <ProgressBar x:Name="progressBar" Minimum="0" Maximum="100" Value="75"  DockPanel.Dock="Top" Visibility="Collapsed" />
    </Grid>

<强> Import.xaml.cs ：

    private void filePicker_Click(object sender, RoutedEventArgs e)
    {
        progressBar.Visibility = Visibility.Visible;

        // here you call your batch code
        var task = new Task(() => Thread.Sleep(3000));
        // after task is done hide progress dialog
        task.ContinueWith(x => Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Background, new Action(() => this.progressBar.Visibility = Visibility.Collapsed)));
        task.Start();
    }

（我没有更新状态。它总是75％。）。

在其他窗口中将操作从用户控件传递到Worker_DoWork

1 个答案: