當用戶重新排列列時，我可以恢復原始列順序（單擊按鈕時）嗎？

Question

請看下面的代碼。當我點擊恢復到組織訂單按鈕時​​，這些列應重新排序爲原始數據網格訂單。有沒有可能？請幫幫我...... //下面是我的代碼

<Window x:Class="GridTextBox.MainWindow" 
     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     Title="MainWindow" Height="350" Width="525" WindowState="Maximized" Loaded="MainWindow_Loaded" Background="Gray"> 

    <Grid> 
     <Grid.RowDefinitions> 
      <RowDefinition Height="30"/> 
      <RowDefinition Height="*"/> 
      <RowDefinition Height="30"/> 
     </Grid.RowDefinitions> 
     <Grid.ColumnDefinitions> 
      <ColumnDefinition Width=".25*"/> 

      <ColumnDefinition Width=".25*"/> 
      <ColumnDefinition Width=".25*"/> 
      <ColumnDefinition Width=".25*"/> 
     </Grid.ColumnDefinitions> 
     <DataGrid ColumnReordered="datagrid1_ColumnReordered" GotFocus="datagrid1_GotFocus" LoadingRowDetails="datagrid1_LoadingRowDetails" Grid.ColumnSpan="3" Background="Gray" Grid.Row="1" Height="auto" Name="datagrid1" AutoGenerateColumns="False" Width="440" VerticalAlignment="Center" SelectionChanged="datagrid1_SelectionChanged"> 
      <DataGrid.Columns> 
       <DataGridTemplateColumn Header="Empid"> 
        <DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBox Name="txtEmpid" Text="{Binding Empid}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellTemplate> 
       </DataGridTemplateColumn> 
       <DataGridTemplateColumn Header="Empname"> 
        <DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBox Text="{Binding Empname}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellTemplate> 
        <DataGridTemplateColumn.CellEditingTemplate> 
         <DataTemplate> 
          <TextBox Text="{Binding Empname}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellEditingTemplate> 
       </DataGridTemplateColumn> 
       <DataGridTemplateColumn Header="Empaddress"> 
        <DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBox Text="{Binding Empaddress}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellTemplate> 
       </DataGridTemplateColumn> 
       <DataGridTemplateColumn Header="EmpCity"> 
        <DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBox Text="{Binding EmpCity}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellTemplate> 
       </DataGridTemplateColumn> 
       <DataGridTemplateColumn Header="Empstate"> 
        <DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBox Text="{Binding EmpState}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellTemplate> 
       </DataGridTemplateColumn> 
       <DataGridTemplateColumn Header="EmpCountry"> 
        <DataGridTemplateColumn.CellTemplate> 
         <DataTemplate> 
          <TextBox Text="{Binding EmpCountry}"></TextBox> 
         </DataTemplate> 
        </DataGridTemplateColumn.CellTemplate> 
       </DataGridTemplateColumn>   
      </DataGrid.Columns> 

     </DataGrid> 
     <Button Grid.Row="2" Grid.Column="2" Height="30" Content="Insert Employees" Click="Button_Click"></Button> 
     <Button Grid.Row="2" Grid.Column="1" Height="30" Content="Revert to org order" Name="btn" Click="btn_Click"></Button> 
    </Grid> 
</Window> 

Answer 1

您可以在內存中保持小字典和按鈕點擊使用每列的DisplayIndex Property將原來的看法。

---

編輯：添加一個例子

XAML

<Grid> 
    <Grid.RowDefinitions> 
     <RowDefinition Height="281*" /> 
     <RowDefinition Height="30*" /> 
    </Grid.RowDefinitions> 
    <DataGrid Name="datagrid1" ItemsSource="12345567" Loaded="datagrid1_Loaded"> 
     <DataGrid.Columns> 
     <DataGridTextColumn Header="Col1" Binding="{Binding}" /> 
     <DataGridTextColumn Header="Col2" Binding="{Binding}" /> 
     <DataGridTextColumn Header="Col3" Binding="{Binding}" /> 
     <DataGridTextColumn Header="Col4" Binding="{Binding}" /> 
     <DataGridTextColumn Header="Col5" Binding="{Binding}" /> 
     </DataGrid.Columns> 
    </DataGrid> 
    <Button Grid.Row="1" Content="Reorder" Click="Button_Click"/> 
</Grid> 

並在後面的代碼：

private Dictionary<int, string> originalOrder; 
private void datagrid1_Loaded(object sender, RoutedEventArgs e) 
{ 
    if (originalOrder == null) originalOrder = new Dictionary<int, string>(); 
    //I will save the header content as a string, 
    //but you can save anything you want to identify each column 
    datagrid1.Columns.ToList().ForEach(c => originalOrder.Add(c.DisplayIndex, c.Header.ToString())); 
} 

private void Button_Click(object sender, RoutedEventArgs e) 
{ 
    originalOrder.ToList().ForEach(k => 
    { 
    datagrid1.Columns.FirstOrDefault(c => c.Header.ToString() == k.Value).DisplayIndex = k.Key; 
    }); 
} 

Answer 2

//This is my code behind file for the above xaml 
    using System; 
    using System.Collections.Generic; 
    using System.Data; 
    using System.Data.SqlClient; 
    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; 

    namespace GridTextBox 
{ 
    /// <summary> 
    /// Interaction logic for MainWindow.xaml 
    /// </summary> 
    /// 

    //private Dictionary<int, string> orde=new Dictionary<int, string>() ; 
    public partial class MainWindow : Window 
    { 
     public MainWindow() 
     { 
      InitializeComponent(); 


     } 

     protected void MainWindow_Loaded(object sender, RoutedEventArgs e) 
     { 
      try 
      { 
       Employee emp = new Employee(); 
       DataTable dt = emp.GetEmployees(); 
       datagrid1.ItemsSource = dt.DefaultView; 

     } 
      catch (Exception ex) 
      { 

       throw ex; 
      } 
     } 

     private void Button_Click(object sender, RoutedEventArgs e) 
     { 
      InsertEmployees ie=new InsertEmployees(); 
      ie.Show(); 
     } 

     private void datagrid1_GotFocus(object sender, RoutedEventArgs e) 
     { 


     } 

     private void datagrid1_SelectionChanged(object sender, SelectionChangedEventArgs e) 
     { 

     } 



     private void datagrid1_LoadingRowDetails(object sender, DataGridRowDetailsEventArgs e) 
     { 

      var txtbox = GetTemplateChild("txtEmpid") as TextBox; 
      txtbox.Text = "hiiiii"; 

     } 

     private void datagrid1_ColumnReordered(object sender, DataGridColumnEventArgs e) 
     { 

     } 

     //declare here your dictionary 
     private Dictionary<int, string> originalOrder; 

     private void datagrid1_Loaded(object sender, RoutedEventArgs e) 
     { 
      if (originalOrder == null) originalOrder = new Dictionary<int, string>(); 

      datagrid1.Columns.ToList().ForEach(c => originalOrder.Add(c.DisplayIndex, c.Header.ToString())); 
     } 

     private void btn_Click(object sender, RoutedEventArgs e) 
     { 

      originalOrder.ToList().ForEach(k => 
      {    
      datagrid1.Columns.FirstOrDefault(c => c.Header.ToString() == k.Value).DisplayIndex = k.Key; 
      }); 
     } 


    } 
}