動態修改列DataGrid

Question

請原諒我，如果我沒有正確的大寫。我習慣於Java，但我試圖堅持C＃約定！

我在動態設置DataGrid中列的數據時遇到了問題。我成功地添加了列動態設置列標題，但我似乎無法設置數據。結果如下：

數據正在被讀取，columnData包含正確的值，正如記錄器告訴我的。 （我沒有使用Debug類，因爲我在沒有Visual C＃的機器上測試）。

我認爲，DataGrid類是問題所在。此外，我認爲，問題的關鍵在於我如何使用綁定（我沒有怎麼做一個好把握，尚）

這是我的課：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Windows.Data; 

namespace mdr 
{ 
    class MDRResult : System.Windows.Controls.DataGrid 
    { 
     private string[] headers; 

     private string[][] fields; 

     public MDRResult(string[] headers, string[][] fields) : base() 
     { 

      int columnNumber = 0; 
      foreach (string s in headers) 
      { 
       System.Windows.Controls.DataGridTextColumn column = new System.Windows.Controls.DataGridTextColumn(); 
       column.Header = s; 
       string[] columnData = new string[fields.Length]; 
       int rowNumber = 0; 
       foreach (string[] row in fields) 
       { 
        columnData[rowNumber] = row[columnNumber]; 
        rowNumber++; 
       } 
       SurfaceWindow1.logger.WriteLine("Adding column " + s + " with data "); 
       foreach (string str in columnData) 
        SurfaceWindow1.logger.WriteLine("\t" + str); 
       Binding b = new Binding(); 
       //b.Mode = BindingMode.OneTime; 
       b.Source = columnData; 
       column.Binding = b; 
       Columns.Add(column); 
       columnNumber++; 
      } 

     } 
    } 
} 

我的XAML與另一個班級配對。這裏是XAML：

<s:SurfaceWindow x:Class="mdr.SurfaceWindow1" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:s="http://schemas.microsoft.com/surface/2008" 
    Title="SurfaceApplication1" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"> 
    <Grid Background="#FFC7C7C7"> 
     <s:ScatterView HorizontalAlignment="Left" Margin="248,1,0,0" Name="resultsView" VerticalAlignment="Top" Background="#FFDBDBDB" Grid.RowSpan="2"> 
     </s:ScatterView> 
     <Grid HorizontalAlignment="Left" Width="270"> 
      <Grid.RowDefinitions> 
       <RowDefinition Height="274*" /> 
       <RowDefinition Height="307*" /> 
      </Grid.RowDefinitions> 
      <Grid HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0, 20, 0, 0"> 
       <s:SurfaceTextBox Height="37" HorizontalAlignment="Right" Margin="70,0,0,0" Name="fileLocation" VerticalAlignment="Center" Width="173" Background="White" Foreground="Black" BorderBrush="Black" VerticalContentAlignment="Center" Text="http://endeavour.dartmouth.edu/eva/MDR-SampleData.txt" /> 
       <Label Content="File:" Height="10" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5,0,0,0" Name="FileLabel" Width="50" Foreground="Black" /> 
      </Grid> 
      <Grid HorizontalAlignment="Left" VerticalAlignment="Top" Margin="0, 70, 0, 0"> 
       <s:SurfaceTextBox Height="37" HorizontalAlignment="Right" Margin="70,0,0,0" Name="cv" VerticalAlignment="Center" Width="173" Background="White" Foreground="Black" BorderBrush="Black" VerticalContentAlignment="Center" Text="10" /> 
       <Label Content="CV:" Height="10" VerticalAlignment="Center" HorizontalAlignment="Left" Margin="5,0,0,0" Name="CVLabel" Width="50" Foreground="Black" /> 
      </Grid> 
     </Grid> 
     <Grid Height="400" Margin="0, 120, 0, 0" HorizontalAlignment="Left" Width="270"> 
      <s:SurfaceSlider ValueChanged="minSlider_ValueChanged" Grid.Row="1" Height="300" HorizontalAlignment="Left" Margin="62,6,0,0" Name="minSlider" VerticalAlignment="Top" Width="27" Orientation="Vertical" TickPlacement="BottomRight" IsSnapToTickEnabled="True" Minimum="1" /> 
      <s:SurfaceSlider ValueChanged="maxSlider_ValueChanged" Height="300" HorizontalAlignment="Right" Margin="0,6,46,0" Name="maxSlider" VerticalAlignment="Top" Width="27" Grid.Row="1" IsDirectionReversed="False" Orientation="Vertical" Value="1" TickPlacement="BottomRight" IsSnapToTickEnabled="True" Minimum="1" /> 
      <Label Content="Min: 1" Height="26" HorizontalAlignment="Left" Margin="1,133,0,0" Name="minLabel" VerticalAlignment="Top" Width="77" Foreground="Black" /> 
      <Label Content="Max: 1" Height="26" HorizontalAlignment="Left" Margin="103,133,0,0" Name="maxLabel" VerticalAlignment="Top" Width="88" Foreground="Black" /> 
      <Label Content="Level" Grid.Row="1" Height="17" HorizontalAlignment="Center" Margin="0,0,0,0" Name="label3" VerticalAlignment="Top" Width="60" Foreground="Black" /> 
     </Grid> 
     <s:SurfaceButton Click="onMDRSubmit" Content="Run" Height="50" HorizontalAlignment="Left" Margin="40,0,0,40" Name="runButton" VerticalAlignment="Bottom" Width="172" FontSize="32" BorderBrush="Black" Grid.Row="1" Background="#FF9A9A9A" HorizontalContentAlignment="Center" /> 
    </Grid> 
</s:SurfaceWindow> 

這裏是類：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Windows; 
using System.Windows.Controls; 
using System.Windows.Data; 
using System.Windows.Documents; 
using System.Windows.Input; 
using System.Windows.Media; 
using System.Windows.Media.Imaging; 
using System.Windows.Navigation; 
using System.Windows.Shapes; 
using Microsoft.Surface; 
using Microsoft.Surface.Presentation; 
using Microsoft.Surface.Presentation.Controls; 
using Microsoft.Surface.Presentation.Input; 
using System.IO; 
using System.Diagnostics; 
using System.Data; 
using System.Collections; 

namespace mdr 
{ 
    /// <summary> 
    /// Interaction logic for SurfaceWindow1.xaml 
    /// </summary> 
    public partial class SurfaceWindow1 : SurfaceWindow 
    { 
     /// <summary> 
     /// Default constructor. 
     /// </summary> 
     /// 
     MDRInterface mdr; 
     public static StreamWriter logger; 
     public static String directory; 
     public SurfaceWindow1() 
     { 
      InitializeComponent(); 

      // Add handlers for window availability events 
      AddWindowAvailabilityHandlers(); 
     } 

     /// <summary> 
     /// Occurs when the window is about to close. 
     /// </summary> 
     /// <param name="e"></param> 
     protected override void OnClosed(EventArgs e) 
     { 
      base.OnClosed(e); 

      // Remove handlers for window availability events 
      RemoveWindowAvailabilityHandlers(); 
     } 

     /// <summary> 
     /// Adds handlers for window availability events. 
     /// </summary> 
     private void AddWindowAvailabilityHandlers() 
     { 
      // Subscribe to surface window availability events 
      ApplicationServices.WindowInteractive += OnWindowInteractive; 
      ApplicationServices.WindowNoninteractive += OnWindowNoninteractive; 
      ApplicationServices.WindowUnavailable += OnWindowUnavailable; 
     } 

     /// <summary> 
     /// Removes handlers for window availability events. 
     /// </summary> 
     private void RemoveWindowAvailabilityHandlers() 
     { 
      // Unsubscribe from surface window availability events 
      ApplicationServices.WindowInteractive -= OnWindowInteractive; 
      ApplicationServices.WindowNoninteractive -= OnWindowNoninteractive; 
      ApplicationServices.WindowUnavailable -= OnWindowUnavailable; 
     } 

     /// <summary> 
     /// This is called when the user can interact with the application's window. 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     private void OnWindowInteractive(object sender, EventArgs e) 
     { 
      //TODO: enable audio, animations here 
     } 

     /// <summary> 
     /// This is called when the user can see but not interact with the application's window. 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     private void OnWindowNoninteractive(object sender, EventArgs e) 
     { 
      //TODO: Disable audio here if it is enabled 

      //TODO: optionally enable animations here 
     } 

     /// <summary> 
     /// This is called when the application's window is not visible or interactive. 
     /// </summary> 
     /// <param name="sender"></param> 
     /// <param name="e"></param> 
     private void OnWindowUnavailable(object sender, EventArgs e) 
     { 
      //TODO: disable audio, animations here 
     } 

     private void AddMDRResult(string result) 
     { 
      DataTable table = new DataTable(); 
      string[] rows = result.Split('\n'); 
      foreach (string s in rows[0].Split('\t')) 
      { 
       if (s.Length == 0) continue; 
       logger.WriteLine("Adding header " + s); 
       table.Columns.Add(s); 
      } 

      bool first = true; 
      foreach (string s in rows) 
      { 
       if (first) 
       { 
        first = false; 
        continue; 
       } 
       DataRow row = table.NewRow(); 
       int i = 0; 
       logger.WriteLine("Row " + table.Rows.Count + ": "); 
       foreach (string value in s.Split('\t')) 
       { 
        if (value.Length == 0) 
         continue; 
        logger.WriteLine("\t element " + i + ": " + value); 
        row[i] = value; 
        i++; 
       } 
       for (i = 0; i < table.Columns.Count; i++) 
        logger.Write(row[i] + "\t"); 

       logger.WriteLine(); 
       table.Rows.Add(row); 
      } 

      DataView view = table.AsDataView(); 

      ScatterViewItem item = new ScatterViewItem(); 
      ArrayList headersList = new ArrayList(); 
      foreach (string s in rows[0].Split('\t')) 
      { 
       if (s.Length == 0) continue; 
       headersList.Add(s); 
      } 

      object[] list = headersList.ToArray(); 
      string[] headers = new string[list.Length]; 

      for(int i = 0; i < headers.Length; i++) 
       headers[i] = list[i].ToString(); 

      ArrayList fieldList = new ArrayList(); 
      first = true; 
      foreach (string s in rows) 
      { 
       if (first) {first = false; continue;} 
       int i = 0; 
       string[] row = new string[headers.Length]; 
       foreach (string value in s.Split('\t')) 
       { 
        if (value.Length == 0) 
         continue; 
        row[i] = value; 
        i++; 
       } 
       fieldList.Add(row); 
      } 

      list = fieldList.ToArray(); 
      string[][] fields = new string[list.Length][]; 

      for(int i = 0; i < list.Length; i++) 
       fields[i] = (string[])(list[i]); 

      item.Content = new MDRResult(headers, fields); 

      item.Width = 500; 
      item.Height = 500; 

      resultsView.Items.Add(item); 
     } 

     private void onMDRSubmit(object sender, RoutedEventArgs args) 
     { 
      if (logger == null) 
      { 
       directory = Directory.GetCurrentDirectory(); 
       if (directory[directory.Length - 1] == '\\') 
        directory = directory.Substring(0, directory.Length - 1); 
       String logFile = directory + "\\log\\surface.txt"; 
       Debug.WriteLine("Creating log file: " + logFile); 
       if (File.Exists(logFile)) 
        File.Delete(logFile); 
       Directory.CreateDirectory("\\log\\"); 
       FileStream stream = File.Create(logFile); 
       logger = new StreamWriter(stream); 
       logger.AutoFlush = true; 
      } 
      if (mdr == null) 
      { 
       logger.WriteLine("Initializing MDR wrapper..."); 
       mdr = new MDRInterface(); 
       logger.WriteLine("Initialized MDR wrapper!"); 
      } 
      logger.WriteLine("Starting MDR..."); 
      string text = cv.Text; 
      string result = mdr.RunMDR(int.Parse(text), (int)minSlider.Value, (int)maxSlider.Value, (long)0, fileLocation.Text); 
      logger.WriteLine("Finished MDR! Adding to results list."); 
      AddMDRResult(result); 
     } 

     private void minSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e) 
     { 
      try 
      { 
       if (e.NewValue > maxSlider.Value) 
        minSlider.Value = e.OldValue; 
       minLabel.Content = "Min: " + minSlider.Value; 
      } 
      catch (NullReferenceException ex) 
      { 
       //ignore 
      } 
     } 

     private void maxSlider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e) 
     { 
      try 
      { 
       if (e.NewValue < minSlider.Value) 
        maxSlider.Value = e.OldValue; 
       maxLabel.Content = "Max: " + maxSlider.Value; 
      } 
      catch (NullReferenceException ex) 
      { 
       //ignore 
      } 
     } 
    } 
} 

Answer 1

嘗試這樣的：

class MDRResult : DataGrid 
{ 
    public MDRResult(string[] headers, string[][] fields) 
     : base() 
    { 
     for (int i = 0; i < headers.Length; ++i) 
      this.Columns.Add(new DataGridTextColumn() 
      { 
       Header = headers[i], 
       Binding = new Binding("[" + i + "]") 
      }); 
     this.AutoGenerateColumns = false; 
     this.ItemsSource = fields; 
    } 
}