Xaml在将FontWeight设置为文本时解析异常。 [英] Xaml parse exception while setting FontWeight to a text.

问题描述

我在我的示例中使用了自定义文本框并创建了一个FontWeight类型的属性来设置文本的字体粗细，但我得到了xaml解析例外。

< local：TextBoxEx Height =" 40"宽度= QUOT; 292"前景= QUOT;红色" 
 Text =" Annotation" FontWeightEx = QUOT; ExtraBold" 
背景="白色>> 
 
< / local：TextBoxEx> 
 
公共类TextBoxEx：TextBox 
 {
 
 public TextBoxEx（）
 {
 this.FontWeight = FontWeightEx; 
} 
 
 
 public FontWeight FontWeightEx 
 {
 get {return（FontWeight）GetValue（FontWeightExProperty）; } 
 set {SetValue（FontWeightExProperty，value）; } 
} 
 
 //使用DependencyProperty作为FontWeightEx的后备存储。这支持动画，样式，绑定等... 
 public static readonly DependencyProperty FontWeightExProperty = 
 DependencyProperty.Register（" FontWeightEx"，typeof（FontWeight），typeof（TextBoxEx），
 new PropertyMetadata（FontWeights.Bold））; 
} 

解决方案

可能你必须转换字符串（例如"ExtraBold"）到 FontWeight 结构，反之亦然。基于

https：// social.msdn.microsoft.com/Forums/vstudio/en-US/e678e5bb-31e2-4a85-a8dd-fce502a5aefe ，这是一个例子：

 string weight =" ExtraBold" ;; 
 FontWeight font_weight =（FontWeight）new FontWeightConverter（）。ConvertFromString（weight）; 
 

或者你可以根据'使用自己的转换开关'

Hi,

I have used custom textbox in my sample and created a property of type FontWeight to set  font weight to the text, but I am getting xaml parse exception.

  <local:TextBoxEx  Height="40" Width="292" Foreground="Red" 
                          Text="Annotation"  FontWeightEx="ExtraBold"
                         Background="White">
            
        </local:TextBoxEx>

  public class TextBoxEx : TextBox
    {

        public TextBoxEx()
        {            
            this.FontWeight = FontWeightEx;            
        }


  public FontWeight FontWeightEx
        {
            get { return (FontWeight)GetValue(FontWeightExProperty); }
            set { SetValue(FontWeightExProperty, value); }
        }

        // Using a DependencyProperty as the backing store for FontWeightEx.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty FontWeightExProperty =
            DependencyProperty.Register("FontWeightEx", typeof(FontWeight), typeof(TextBoxEx),
            new PropertyMetadata(FontWeights.Bold));
 }

解决方案

Probably you have to convert the strings (such as "ExtraBold") to FontWeight structures and viceversa. Based on https://social.msdn.microsoft.com/Forums/vstudio/en-US/e678e5bb-31e2-4a85-a8dd-fce502a5aefe, here is an example:

string weight = "ExtraBold";
FontWeight font_weight = (FontWeight)new FontWeightConverter().ConvertFromString(weight);

Or you can use your own conversion based on ‘switch’.

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