C# 通过AttachedProperty设置所有DataGridTextColumns的样式
我试图做的是创建一个C# 通过AttachedProperty设置所有DataGridTextColumns的样式,c#,wpf,wpfdatagrid,attached-properties,C#,Wpf,Wpfdatagrid,Attached Properties,我试图做的是创建一个样式,在Datagrid中的所有DataGridTextColumns上应用换行符,而不显式地这样设置 <DataGrid ItemsSource="{Binding Lines}"> <DataGrid.Columns> <DataGridTextColumn Header="Column1" Binding="{Binding Path=Result1}"> <DataGridTex
样式
,在Datagrid
中的所有DataGridTextColumns
上应用换行符,而不显式地这样设置
<DataGrid ItemsSource="{Binding Lines}">
<DataGrid.Columns>
<DataGridTextColumn Header="Column1" Binding="{Binding Path=Result1}">
<DataGridTextColumn.ElementStyle>
<Style TargetType="{x:Type TextBlock}">
<Setter Property="TextWrapping" Value="Wrap"/>
</Style>
</DataGridTextColumn.ElementStyle>
</DataGridTextColumn>
</DataGrid.Columns>
</DataGrid>
我找到了RayBurns的解决方案,并试图弄清楚它是如何工作的。然而,我对附加属性是新手,因此不理解它为什么不起作用
c代码似乎还可以
public class MyDataGridHelper : DependencyObject
{
private static readonly DependencyProperty TextColumnStyleProperty = DependencyProperty.RegisterAttached("TextColumnStyle", typeof(Style), typeof(MyDataGridHelper), new PropertyMetadata
{
PropertyChangedCallback = (obj, e) =>
{
var grid = (DataGrid)obj;
if (e.OldValue == null && e.NewValue != null)
grid.Columns.CollectionChanged += (obj2, e2) =>
{
UpdateColumnStyles(grid);
};
}
});
public static void SetTextColumnStyle(DependencyObject element, Style value)
{
element.SetValue(TextColumnStyleProperty, value);
}
public static Style GetTextColumnStyle(DependencyObject element)
{
return (Style)element.GetValue(TextColumnStyleProperty);
}
private static void UpdateColumnStyles(DataGrid grid)
{
var style = GetTextColumnStyle(grid);
foreach (var column in grid.Columns.OfType<DataGridTextColumn>())
foreach (var setter in style.Setters.OfType<Setter>())
if (setter.Value is BindingBase)
BindingOperations.SetBinding(column, setter.Property, (BindingBase)setter.Value);
else
column.SetValue(setter.Property, setter.Value);
}
}
公共类MyDataGridHelper:DependencyObject
{
私有静态只读DependencyProperty TextColumnStypeProperty=DependencyProperty.RegisterAttached(“TextColumnStyle”、typeof(Style)、typeof(MyDataGridHelper)、new PropertyMetadata
{
PropertyChangedCallback=(对象,e)=>
{
var grid=(DataGrid)obj;
如果(e.OldValue==null&&e.NewValue!=null)
grid.Columns.CollectionChanged+=(obj2,e2)=>
{
UpdateColumnStyles(网格);
};
}
});
公共静态void SetTextColumnStyle(DependencyObject元素,样式值)
{
SetValue(TextColumnStyleProperty,value);
}
公共静态样式GetTextColumnStyle(DependencyObject元素)
{
return(Style)element.GetValue(TextColumnStyleProperty);
}
私有静态void UpdateColumnStyles(DataGrid网格)
{
var style=GetTextColumnStyle(网格);
foreach(grid.Columns.OfType()中的var列)
foreach(style.Setters.OfType()中的var setter)
if(setter.Value为BindingBase)
BindingOperations.SetBinding(列,setter.Property,(BindingBase)setter.Value);
其他的
column.SetValue(setter.Property,setter.Value);
}
}
我完全搞不懂的是,当我们开始找出风格设定者的时候。
目前我正在尝试这种方式,这显然不起作用,但实际上我不知道这个targettype应该是什么样子
<local:MyDataGridHelper.TextColumnStyle>
<Style TargetType="FrameworkElement">
<Setter Property="TextBlock.TextWrapping" Value="Wrap"/>
</Style>
</local:MyDataGridHelper.TextColumnStyle>
您应该将列的
ElementStyle
设置为附加属性的值:
public class MyDataGridHelper : DependencyObject
{
private static readonly DependencyProperty TextColumnStyleProperty =
DependencyProperty.RegisterAttached("TextColumnStyle", typeof(Style), typeof(MyDataGridHelper), new PropertyMetadata
{
PropertyChangedCallback = (obj, e) =>
{
var grid = (DataGrid)obj;
if (e.OldValue == null && e.NewValue != null)
grid.Columns.CollectionChanged += (obj2, e2) =>
{
UpdateColumnStyles(grid);
};
}
});
public static void SetTextColumnStyle(DependencyObject element, Style value)
{
element.SetValue(TextColumnStyleProperty, value);
}
public static Style GetTextColumnStyle(DependencyObject element)
{
return (Style)element.GetValue(TextColumnStyleProperty);
}
private static void UpdateColumnStyles(DataGrid grid)
{
var style = GetTextColumnStyle(grid);
foreach (var column in grid.Columns.OfType<DataGridTextColumn>())
column.ElementStyle = style;
}
}
公共类MyDataGridHelper:DependencyObject
{
私有静态只读DependencyProperty TextColumnStyleProperty=
DependencyProperty.RegisterAttached(“TextColumnStyle”、typeof(Style)、typeof(MyDataGridHelper)、new PropertyMetadata
{
PropertyChangedCallback=(对象,e)=>
{
var grid=(DataGrid)obj;
如果(e.OldValue==null&&e.NewValue!=null)
grid.Columns.CollectionChanged+=(obj2,e2)=>
{
UpdateColumnStyles(网格);
};
}
});
公共静态void SetTextColumnStyle(DependencyObject元素,样式值)
{
SetValue(TextColumnStyleProperty,value);
}
公共静态样式GetTextColumnStyle(DependencyObject元素)
{
return(Style)element.GetValue(TextColumnStyleProperty);
}
私有静态void UpdateColumnStyles(DataGrid网格)
{
var style=GetTextColumnStyle(网格);
foreach(grid.Columns.OfType()中的var列)
column.ElementStyle=样式;
}
}
用法:
<DataGrid>
<local:MyDataGridHelper.TextColumnStyle>
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Red"/>
<Setter Property="TextWrapping" Value="Wrap"/>
</Style>
</local:MyDataGridHelper.TextColumnStyle>
...
</DataGrid>
...
一个小的添加。这将覆盖所有列的整个样式。如果一个列应该有一些单独的信息,我们可以这样做,只添加setter。静态void UpdateColumnStyles(DataGrid网格){var origStyle=GetTextColumnStyle(网格);foreach(grid.Columns.OfType()中的var column){var newStyle=newStyle();newStyle.BasedOn=column.ElementStyle;newStyle.TargetType=origStyle.TargetType;foreach(origStyle.Setters.OfType()中的var setter){newStyle.Setters.Add(setter);}column.ElementStyle=newStyle;}
<DataGrid>
<local:MyDataGridHelper.TextColumnStyle>
<Style TargetType="TextBlock">
<Setter Property="Foreground" Value="Red"/>
<Setter Property="TextWrapping" Value="Wrap"/>
</Style>
</local:MyDataGridHelper.TextColumnStyle>
...
</DataGrid>