WPF （DataGridColumnHeader）实现自义定列头样式 并绑定数据

原文: WPF （DataGridColumnHeader）实现自义定列头样式 并绑定数据

实现功能是这样的 

自定义列头 样式 样式里的 数据来源于后台绑定 

这篇就说头样式 和头样式数据绑定

思路

1）实现功能的时候 首先想的是编辑列头样式 选择使用DataGridTextColumn 编辑 DataGridColumnHeader 样式

样式很简单 就布局好了 这段结束

2）动态列 没有要求换肤 所以就没有完全使用MVVM 直接写后台循环   到这里数据有了

  
  
List< string> LS = new List< string>();

public void addColumn()
{
LS.Add( "表下カップ綿天竺仮縫い_37s_C_1");
LS.Add( "上カップマーキしつけ_28s_C_2");
LS.Add( "上下カップ接ぎ_33s_C_3");
LS.Add( "上下カップ押え_62s_B_4");
LS.Add( "カップ脇しつけ_14s_B_5");
LS.Add( "表上カップレース端押さえ_41s_B_6");

for ( int i = 0; i < LS.Count; i++)
{
DataGridTextColumn dl = new DataGridTextColumn();
dl.Header=LS[i];

dataGrid.Columns.Add(dl);
}

}
 
 

3）最难的数据绑定 数据来源 header 如果有只有俩个 就不用那么麻烦 直接在样式里ControlTemplate   中用TemplateBinding 绑定 Content 和tag  就可以

{TemplateBinding Content}

content = Header 里的值  当然 要使用tag 就要在上面的for 里加上tag的值 样式里 需要 绑定{TemplateBinding tag}

但是 我的项目需要4个 这就需要夸越TemplateBinding 这个绑定 我查了一下 想扩展template 但是资料太少 

解决方法  自义定控件

首先我显示的控件是lable 所以 我自定义了一个lable 写 依赖属性 虽然有点繁琐 也算是一个比较笨的解决方案

1）定义 Ms  来获得header的数据  并处理数据 

2）定义MyProperty 来获得Ms处理后的数据 绑定到 lable 的 Content 属性

3）使用控件本身的tag 来区分那个lable

 贴码：

自定义的lable控件

  
  
public class LableColumn : Label
{
public LableColumn()
: base()
{
}

//获得值
public string Ms
{
get { return ( string)GetValue(MsProperty); }
set { SetValue(MsProperty, value); }
}

// Using a DependencyProperty as the backing store for ms. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MsProperty =
DependencyProperty.Register( "Ms", typeof( string), typeof(LableColumn), new FrameworkPropertyMetadata( "", Onshow));



//用于绑定的值
public string MyProperty
{
get { return ( string)GetValue(MyPropertyProperty); }
set { SetValue(MyPropertyProperty, value); }
}

// Using a DependencyProperty as the backing store for MyProperty. This enables animation, styling, binding, etc...
public static readonly DependencyProperty MyPropertyProperty =
DependencyProperty.Register( "MyProperty", typeof( string), typeof(LableColumn), new PropertyMetadata( ""));





private static void Onshow(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
LableColumn l = d as LableColumn;

if (l.Ms != null && l.Ms != "")
{
String[] strarr = l.Ms.ToString().Split( new string[] { "_" }, StringSplitOptions.None);

if (l.Tag.Equals( "1"))
{
l.MyProperty= strarr[ 3];
}
else if (l.Tag.Equals( "2"))
{
l.MyProperty = strarr[ 0];

}
else if (l.Tag.Equals( "3"))
{ l.MyProperty= strarr[ 2] ;
}
else if (l.Tag.Equals( "4"))
{
l.MyProperty= strarr[ 1];
}
}
}


}
 
 

前台的DataGridColumnHeader 样式

  
  
<Style TargetType= "{x:Type DataGridColumnHeader}">
<Setter Property= "VerticalContentAlignment" Value= "Center"/>
<Setter Property= "Template">
<Setter.Value>
<ControlTemplate TargetType= "{x:Type DataGridColumnHeader}">

<Grid HorizontalAlignment= "Left " Height= "Auto " VerticalAlignment= "Stretch " Width= "Auto " Background= "White " Margin= "0 ">
<Grid.RowDefinitions>
<RowDefinition Height= "* "/>
</Grid.RowDefinitions>
<Border BorderBrush= "Black " BorderThickness= "1 " HorizontalAlignment= "Stretch " Height= "Auto " Margin= "0 " VerticalAlignment= "Stretch " Grid.RowSpan= "1 ">
<Grid HorizontalAlignment= "Stretch " Height= "Auto " Margin= "-1,0,0,0 " VerticalAlignment= "Stretch ">
<Grid.RowDefinitions>
<RowDefinition Height= "20* "/>
<RowDefinition Height= "20* "/>
<RowDefinition Height= "20* "/>
<RowDefinition Height= "20* "/>
</Grid.RowDefinitions>
<Border BorderBrush= "Black " BorderThickness= "1,1,0,1 " HorizontalAlignment= "Stretch " Height= "Auto " Margin= "0 " VerticalAlignment= "Stretch " Width= "Auto " Grid.Row= "1 ">
<local:LableColumn Tag= "3" Content= "{Binding RelativeSource={RelativeSource self},Path=MyProperty}" Ms= "{TemplateBinding Content}" Background= "#FFF9F9F9 " HorizontalAlignment= "Stretch " Height= "25 " Margin= "0 " VerticalAlignment= "Stretch " Width= "82 "/>
</Border>
<Border BorderBrush= "Black " BorderThickness= "1,1,0,1 " HorizontalAlignment= "Stretch " Height= "Auto " Margin= "0 " VerticalAlignment= "Stretch " Width= "Auto ">
<local:LableColumn Tag= "1" Content= "{Binding MyProperty, RelativeSource={RelativeSource self}}" Ms= "{TemplateBinding Content}" Background= "#FFF9F9F9 " HorizontalAlignment= "Stretch " Height= "25 " Margin= "0 " VerticalAlignment= "Stretch " Width= "82 "/>
</Border>
<local:LableColumn x:Name= "lText" Tag= "2" Content= "{Binding MyProperty, RelativeSource={RelativeSource self}}" Ms= "{TemplateBinding Content}" Background= "#FFF9F9F9 " HorizontalAlignment= "Stretch " Height= "35 " Margin= "0 " VerticalAlignment= "Stretch " Width= "82 " Visibility= "Collapsed"/>

<Border BorderBrush= "Black " BorderThickness= "1,1,0,1 " HorizontalAlignment= "Stretch " Height= "Auto " Margin= "0,0,0,0 " VerticalAlignment= "Stretch " Width= "Auto " Grid.Row= "2 ">
<TextBlock TextWrapping = "Wrap " Background= "#FFF9F9F9 " Text= "{Binding Path=Content,ElementName=lText}" HorizontalAlignment= "Stretch " Height= "35 " Margin= "0 " VerticalAlignment= "Stretch " Width= "82 "/>

</Border>
<Border BorderBrush= "Black " BorderThickness= "1,1,0,1 " HorizontalAlignment= "Stretch " Height= "Auto " Margin= "0 " VerticalAlignment= "Stretch " Width= "Auto " Grid.Row= "3 ">
<local:LableColumn Tag= "4" Content= "{Binding MyProperty, RelativeSource={RelativeSource self}}" Ms= "{TemplateBinding Content}" Background= "#FFF9F9F9 " HorizontalAlignment= "Stretch " Height= "35 " Margin= "0 " VerticalAlignment= "Stretch " Width= "82 "/>
</Border>
</Grid>
</Border>
</Grid>

</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
 
 

数据绑定的技能 这边涉及到俩种

一个是绑定自身属性  

{Binding MyProperty, RelativeSource={RelativeSource self}}
 
 

第二是绑定其他控件属性

{Binding Path=Content,ElementName=lText}
 
 

肯定有更好的方法来实现 这个功能  希望有人留言 得以分享学习