以编程方式设置Datagrid（WPF）列样式（不是xaml） [英] Datagrid (WPF) Column styling programmatically (not 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。

  private void StyleColumns （）
 {
 //用自定义模板列替换DueDate列。 
 for（int i = 0; i< 7; i + = 2）
 {
 //创建一个新的模板列。 
 DataGridTemplateColumn templateColumn = new DataGridTemplateColumn（）; 
 templateColumn.Header = m_DataGrid.Columns [i] .Header; 
样式样式= new Style（）; 
 templateColumn.CellStyle =（Style）Resources [ ColumnGone]; 
 // ... 
 //用templateColumn替换自动生成的列。 
 m_DataGrid.Columns [i] = templateColumn; 
} 
} 
  

XAML就是这样

 < DataGrid AutoGenerateColumns = True x：Name = m_grfFileDataGrid ItemsSource = {Binding cb.GRF} 
 RowHeight = 20  ColumnWidth = * 
 AlternatingRowBackground =米色 
 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> 
  

任何对此的帮助将不胜感激。谢谢

解决方案

下面是添加带有 Style 的列的示例：

XAML

 < Grid> 
< DataGrid x：Name = m_DataGrid Width = 400 
 AutoGenerateColumns = True 
 Horizo​​ntalAlignment = Left 
 RowHeight = 20 ColumnWidth = *  
 AlternatingRowBackground =米色 
 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> 
 
<按钮名称= AddColumn内容= AddColumn宽度= 100高度= 30 Horizo​​ntalAlignment = Right Click = AddColumn_Click /> 
< / Grid> 
  

后面的代码

 公共类Person 
 {
公共字符串样本
 {
； 
组； 
} 
} 
 
私人ObservableCollection< Person> TestCollection =新的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 =测试; 
 MyColumn.Binding = new Binding（ Sample）; 
 
样式样式=（样式）m_DataGrid.Resources [ ColumnGone]; 
 MyColumn.CellStyle =样式； 
 m_DataGrid.Columns.Add（MyColumn）; 
} 
 
 private void AddColumn_Click（object sender，RoutedEventArgs e）
 {
 StyleColumns（）; 
} 
  

最有可能的是，您没有指出绑定



或者，为现有列设置 Style 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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