项目中有一个需求，需要根据用户的设置动态显示一列，研究了一波后，发现，Grid并没有这个功能，于是通过绑定宽度 的方法，实现的需求。。

思路：将需要隐藏的列宽度 绑定到一个属性上，隐藏时就设置宽度为0

写了个Demo，思路是一样的，看看示例效果吧：

下面就粘上xaml和代码喽：

MainWindow.xaml:

<Window x:Class="wpfcore.MainWindow"xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"xmlns:d="http://schemas.microsoft.com/expression/blend/2008"xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"xmlns:local="clr-namespace:wpfcore" xmlns:controls="http://metro.mahapps.com/winfx/xaml/controls"mc:Ignorable="d"Background="LightBlue"UseLayoutRounding="True"FontSize="20"Title="MainWindow" Width="600" Height="400"><Grid><Grid.RowDefinitions><RowDefinition Height="auto"/><RowDefinition Height="*"/></Grid.RowDefinitions><StackPanel Orientation="Horizontal"><Button Content="显示Name列" Click="Button_Click"/><Button Content="显示Age列" Click="Button_Click_1"/><Border Width="20"/><Button Content="隐藏Name列" Click="Button_Click_2"/><Button Content="隐藏Age列" Click="Button_Click_3"/></StackPanel><Grid Grid.Row="1" Margin="5"><Grid.ColumnDefinitions><ColumnDefinition Width="1*"/><ColumnDefinition Width="{Binding NameWidth}"/><ColumnDefinition Width="{Binding AgeWidth}"/><ColumnDefinition Width="1*"/></Grid.ColumnDefinitions><Grid.RowDefinitions><RowDefinition Height="auto"/><RowDefinition Height="auto"/><RowDefinition Height="auto"/><RowDefinition Height="auto"/><RowDefinition Height="auto"/></Grid.RowDefinitions><TextBlock Text="编号" Grid.Row="0" Grid.Column="0"/><TextBlock Text="姓名" Grid.Row="0" Grid.Column="1"/><TextBlock Text="年龄" Grid.Row="0" Grid.Column="2"/><TextBlock Text="爱好" Grid.Row="0" Grid.Column="3"/><TextBlock Text="1" Grid.Row="1" Grid.Column="0"/><TextBlock Text="张三" Grid.Row="1" Grid.Column="1"/><TextBlock Text="18" Grid.Row="1" Grid.Column="2"/><TextBlock Text="玩游戏" Grid.Row="1" Grid.Column="3"/><TextBlock Text="2" Grid.Row="2" Grid.Column="0"/><TextBlock Text="张三" Grid.Row="2" Grid.Column="1"/><TextBlock Text="18" Grid.Row="2" Grid.Column="2"/><TextBlock Text="玩游戏" Grid.Row="2" Grid.Column="3"/><TextBlock Text="3" Grid.Row="3" Grid.Column="0"/><TextBlock Text="张三" Grid.Row="3" Grid.Column="1"/><TextBlock Text="18" Grid.Row="3" Grid.Column="2"/><TextBlock Text="玩游戏" Grid.Row="3" Grid.Column="3"/><TextBlock Text="3" Grid.Row="4" Grid.Column="0"/><TextBlock Text="张三" Grid.Row="4" Grid.Column="1"/><TextBlock Text="18" Grid.Row="4" Grid.Column="2"/><TextBlock Text="玩游戏" Grid.Row="4" Grid.Column="3"/></Grid></Grid>
</Window>

MainWindow.cs:

using System.Windows;
using System.Windows.Media;namespace wpfcore
{public partial class MainWindow : Window{public MainWindow(){InitializeComponent();DataContext = this;}public GridLength NameWidth{get { return (GridLength)GetValue(NameWidthProperty); }set { SetValue(NameWidthProperty, value); }}public static readonly DependencyProperty NameWidthProperty =DependencyProperty.Register("NameWidth", typeof(GridLength), typeof(MainWindow), new PropertyMetadata(new GridLength(1,GridUnitType.Star)));public GridLength AgeWidth{get { return (GridLength)GetValue(AgeWidthProperty); }set { SetValue(AgeWidthProperty, value); }}public static readonly DependencyProperty AgeWidthProperty =DependencyProperty.Register("AgeWidth", typeof(GridLength), typeof(MainWindow), new PropertyMetadata(new GridLength(1, GridUnitType.Star)));private void Button_Click(object sender, RoutedEventArgs e){NameWidth = new GridLength(1, GridUnitType.Star);}private void Button_Click_1(object sender, RoutedEventArgs e){AgeWidth = new GridLength(1, GridUnitType.Star);}private void Button_Click_2(object sender, RoutedEventArgs e){NameWidth = new GridLength(0, GridUnitType.Star);}private void Button_Click_3(object sender, RoutedEventArgs e){AgeWidth = new GridLength(0, GridUnitType.Star);}}
}

ok.完成喽

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