原文:在WPF中，如何得到任何Object對象的XAML代碼？

在WPF中，可以使用System.Windows.Markup.XamlWriter.Save(objName)得到任何Object對象的XAML代碼。

這里舉個例子，然后來比較一下：
XAML代碼：
// Window1.xaml
<Window x:Class="XamlWriter.Window1"
??? xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
??? xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
??? Title="XamlWriter" Height="421" Width="485"
??? >
??? <Grid Name="Grid1">
??? <Button Height="23" Margin="9,13,0,0" Name="buttonA" VerticalAlignment="Top" Click="WriteXaml_A" HorizontalAlignment="Left" Width="92">WriteMyXaml_1</Button>
??? <Button Height="23" Margin="119,14,0,0" Name="buttonB" VerticalAlignment="Top"? Click="WriteXaml_B" HorizontalAlignment="Left" Width="96">WriteMyXaml_2</Button>
??? <Button Height="24" Margin="228,15,141,0" VerticalAlignment="Top"? Name="buttonC" Click="WriteGridXaml">WriteGridXaml</Button>
??? <Button Height="23" HorizontalAlignment="Right" Margin="0,15,11,0" VerticalAlignment="Top" Width="115" Click="WriteCSharpCode">WriteCodeButton</Button>
??? <TextBox Margin="9,50,10,1" Name="textBox1" TextWrapping="Wrap"></TextBox>
? </Grid>
</Window>

C#代碼：
// Window1.xaml.cs
using System;
using System.Collections.Generic;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace XamlWriter
{
??? /// <summary>
??? /// Interaction logic for Window1.xaml
??? /// </summary>

??? public partial class Window1 : System.Windows.Window
??? {

??????? public Window1()
??????? {
??????????? InitializeComponent();
??????? }

??????? private void WriteXaml_A(object sender, RoutedEventArgs e)
??????? {
??????????? string savedButton = System.Windows.Markup.XamlWriter.Save(this.buttonA);
??????????? textBox1.Text = savedButton;
??????? }

??????? private void WriteXaml_B(object sender, RoutedEventArgs e)
??????? {
??????????? string savedButton = System.Windows.Markup.XamlWriter.Save(this.buttonB);
??????????? textBox1.Text = savedButton;
??????? }

??????? private void WriteGridXaml(object sender, RoutedEventArgs e)
??????? {
??????????? string savedButton = System.Windows.Markup.XamlWriter.Save(this.Grid1);
??????????? textBox1.Text = savedButton;
??????? }

??????? private void WriteCSharpCode(object sender, RoutedEventArgs e)
??????? {
??????????? Button origianlButton = new Button();
??????????? origianlButton.Height = 50;
??????????? origianlButton.Width = 100;
??????????? origianlButton.Background = Brushes.AliceBlue;
??????????? origianlButton.Content = "Click Me";

??????????? string savedButton = System.Windows.Markup.XamlWriter.Save(origianlButton);
??????????? textBox1.Text = savedButton;
??????? }

??? }
}

運行程序，當點擊WriteGridXaml按鈕后，我們可以看到如下結果：

為了更清晰，我將上面結果都COPY成文字，為了方便閱讀，我做了適當整理（加了換行）：
<Grid Name="Grid1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
<Button Height="23" Margin="9,13,0,0" Width="92" HorizontalAlignment="Left" Name="buttonA" VerticalAlignment="Top">WriteMyXaml_1</Button>
<Button Height="23" Margin="119,14,0,0" Width="96" HorizontalAlignment="Left" Name="buttonB" VerticalAlignment="Top">WriteMyXaml_2</Button>
<Button Height="24" Margin="228,15,141,0" Name="buttonC" VerticalAlignment="Top">WriteGridXaml</Button>
<Button Height="23" Margin="0,15,11,0" Width="115" HorizontalAlignment="Right" VerticalAlignment="Top">WriteCodeButton</Button>
<TextBox TextWrapping="Wrap" Margin="9,50,10,1" Name="textBox1" AcceptsReturn="True">&lt;Button Height="23" Margin="119,14,0,0" Width="96" HorizontalAlignment="Left" Name="buttonB" VerticalAlignment="Top" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"&gt;WriteMyXaml_2&lt;/Button&gt;</TextBox>
</Grid>

我們來對比一下最原始的XAML代碼與我們得到的XAML代碼，為了簡潔，只選第一個名為“buttonA”的按鈕。

原始的XAML代碼（從window1.xaml中節選）：
<Button Height="23" Margin="9,13,0,0" Name="buttonA" VerticalAlignment="Top" Click="WriteXaml_A" HorizontalAlignment="Left" Width="92">WriteMyXaml_1</Button>

使用XamlWriter.Save()得到的XAML代碼：
<Button Height="23" Margin="9,13,0,0" Width="92" HorizontalAlignment="Left" Name="buttonA" VerticalAlignment="Top">WriteMyXaml_1</Button>

請注意比較，有何不同？是不是Button的屬性排列次序有變？而且，Click="WriteXaml_A" 這樣的代碼沒有了？

其他的我也不多說了，想想看為什么？

運行WriteCSharpCode(object sender, RoutedEventArgs e)后會得到些什么呢？以下是結果：
<Button Height="50" Width="100" Background="#FFF0F8FF" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">Click Me</Button>

而其C#是：
Button origianlButton = new Button();
origianlButton.Height = 50;
origianlButton.Width = 100;
origianlButton.Background = Brushes.AliceBlue;
origianlButton.Content = "Click Me";

這就是C# 代碼與XAML代碼的相互轉換了。提示：留意Background屬性那句，將Brushes.AliceBlue轉換成了“#FFF0F8FF”。

再想想看，這樣的功能對我們有什么用途？多想多練，舉一返三多得正果。

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