以编程方式设置Datagrid（WPF）列样式（不是xaml）

问题描述

我看过SO，但找不到我想要的确切答案。我有一个绑定到数据源的DataGrid视图。我想在带有datagrid的窗口可见后以编程方式设置列的样式。我还想根据某些行为不时更改它。

我试图使用DataGridTemplateColumn，但是只要它运行，它就会从那些列中删除数据。另外，当我尝试从资源中获取单元格样式时（即始终为空），我也没有得到单元格样式。

  p> 
 
 
指定列的名称：
 < DataGridTextColumn x：Name = MySuperColumn标头= MyColumn Binding = {绑定路径=样本} Width = 100 /> 
  
在代码中设置 Style  
  MySuperColumn.CellStyle = style; 
  
 
I have looked on SO but haven't found an exact answer to what I am looking for. I have a DataGrid view bound to a data source. I want to style columns programmatically after the window with the datagrid is visible. I also want to change it from time to time based on some behavior.
I tried to use the DataGridTemplateColumn but whenever it runs it deletes the data from those columns. Also I don't get the Cell Style when I try to get it from Resources (i.e. its always null)
        private void StyleColumns()
    {
        // Replace the DueDate column with a custom template column.
        for (int i = 0; i < 7; i += 2)
        {
            // Create a new template column.
            DataGridTemplateColumn templateColumn = new DataGridTemplateColumn();
            templateColumn.Header = m_DataGrid.Columns[i].Header;
            Style style = new Style();
            templateColumn.CellStyle = (Style)Resources["ColumnGone"];
            // ...
            // Replace the auto-generated column with the templateColumn.
            m_DataGrid.Columns[i] = templateColumn;
        }
    }
XAML is like this
                        <DataGrid AutoGenerateColumns="True" x:Name="m_grfFileDataGrid" ItemsSource="{Binding cb.GRF}"
                              RowHeight="20" ColumnWidth="*"
                              AlternatingRowBackground="Beige"
                              SelectionUnit="CellOrRowHeader"
                              FontFamily="Consolas"
                              FontSize="12"
                              CanUserReorderColumns="False"
                              CanUserSortColumns="False"
                              CanUserAddRows="False"
                              CanUserDeleteRows="False">
                        <DataGrid.Resources>
                            <Style TargetType="DataGridCell" x:Key="ColumnGone">
                                <Setter Property="Background" Value="SeaGreen"/>
                            </Style>
                            <Style x:Key="DisabledColumn">
                                <Setter Property="DataGridColumn.CanUserResize"
                                        Value="False" />
                                <Setter Property="DataGridColumn.CanUserSort"
                                        Value="False" />
                                <Setter Property="DataGridColumn.CanUserReorder"
                                        Value="False" />
                                <Setter Property="DataGridColumn.CellStyle"
                                        Value="{StaticResource ColumnGone}" />
                            </Style>
                        </DataGrid.Resources>
                    </DataGrid>
Any help on this would be appreciated. thanks
 解决方案 
Here's an example of adding a column with Style:
XAML
<Grid>
    <DataGrid x:Name="m_DataGrid" Width="400"
                          AutoGenerateColumns="True"
                          HorizontalAlignment="Left"
                          RowHeight="20" ColumnWidth="*"
                          AlternatingRowBackground="Beige"
                          SelectionUnit="CellOrRowHeader"
                          FontFamily="Consolas"
                          FontSize="12"
                          CanUserReorderColumns="False"
                          CanUserSortColumns="False"
                          CanUserAddRows="False"
                          CanUserDeleteRows="False">

        <DataGrid.Resources>
            <Style TargetType="DataGridCell" x:Key="ColumnGone">
                <Setter Property="Background" Value="SeaGreen" />
                <Setter Property="Foreground" Value="White" />
            </Style>

            <Style x:Key="DisabledColumn">
                <Setter Property="DataGridColumn.CanUserResize"
                                    Value="False" />
                <Setter Property="DataGridColumn.CanUserSort"
                                    Value="False" />
                <Setter Property="DataGridColumn.CanUserReorder"
                                    Value="False" />
                <Setter Property="DataGridColumn.CellStyle"
                                    Value="{StaticResource ColumnGone}" />
            </Style>
        </DataGrid.Resources>
    </DataGrid>

    <Button Name="AddColumn" Content="AddColumn" Width="100" Height="30" HorizontalAlignment="Right" Click="AddColumn_Click" />
</Grid>
Code behind
public class Person
{
    public string Sample
    {
        get;
        set;
    }
}

private ObservableCollection<Person> TestCollection = new ObservableCollection<Person>();

public MainWindow()
{
    InitializeComponent();

    TestCollection.Add(new Person()
    {
        Sample = "Orange",
    });

    TestCollection.Add(new Person()
    {
        Sample = "White",
    });

    TestCollection.Add(new Person()
    {
        Sample = "Green",
    });

    m_DataGrid.ItemsSource = TestCollection;
}

private void StyleColumns()
{
    DataGridTextColumn MyColumn = new DataGridTextColumn();
    MyColumn.Header = "Test";
    MyColumn.Binding = new Binding("Sample");

    Style style = (Style)m_DataGrid.Resources["ColumnGone"];
    MyColumn.CellStyle = style;
    m_DataGrid.Columns.Add(MyColumn);
}

private void AddColumn_Click(object sender, RoutedEventArgs e)
{
    StyleColumns();
}
Most likely, you do not pointed Binding for the new column.
Alternatively, set the Style for an existing column: 
Specify the name of the column:
<DataGridTextColumn x:Name="MySuperColumn" Header="MyColumn" Binding="{Binding Path=Sample}" Width="100" />
Set the Style in code: 
MySuperColumn.CellStyle = style;
                        
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