WPF生成文本块内联线
我有一个WPF生成文本块内联线,wpf,binding,string-formatting,Wpf,Binding,String Formatting,我有一个GridView,在其中一个GridView列中,我想生成如下文本: textBlock.Text = string.Format("{0} is doing {1} .......", a, b); <GridViewColumn> <GridViewColumn.CellTemplate> <DataTemplate> <TextBlock> <Hy
GridView
,在其中一个GridView列中,我想生成如下文本:
textBlock.Text = string.Format("{0} is doing {1} .......", a, b);
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock>
<Hyperlink NavigateUri="{Binding AUri}">
<Run Text="{Binding A}"/>
</Hyperlink>
<Run Text=" is doing "/>
<Hyperlink NavigateUri="{Binding BUri}">
<Run Text="{Binding B}"/>
</Hyperlink>
</TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
string inlineExpression = "Once i saw a little <bold>bird</bold>, <span>go <bold>hop, hop, hop</bold></span>.";
InlineExpression.SetInlineExpression(myTextBlock1, inlineExpression);
但是a
和b
(视图中项目的属性)不应仅表示为纯文本,而应表示为例如超链接
(另外:文本格式应取决于项目类型)
如何以这种方式生成TextBlock
s文本?(用于本地化)
问题更多:我应该自己写一些东西,还是框架提供了一种简单的方法?在XAML中,您可以这样做:
textBlock.Text = string.Format("{0} is doing {1} .......", a, b);
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock>
<Hyperlink NavigateUri="{Binding AUri}">
<Run Text="{Binding A}"/>
</Hyperlink>
<Run Text=" is doing "/>
<Hyperlink NavigateUri="{Binding BUri}">
<Run Text="{Binding B}"/>
</Hyperlink>
</TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
string inlineExpression = "Once i saw a little <bold>bird</bold>, <span>go <bold>hop, hop, hop</bold></span>.";
InlineExpression.SetInlineExpression(myTextBlock1, inlineExpression);
在代码隐藏中,同样的事情也可以做,但我不推荐这样做,因为它涉及到使用。最近我遇到了同样的问题。因此,我决定为TextBlock
实现一个附加属性,该属性的值为string
type,然后动态填充Inlines
集合。您只需将属性值设置为以下值:
textBlock.Text = string.Format("{0} is doing {1} .......", a, b);
<GridViewColumn>
<GridViewColumn.CellTemplate>
<DataTemplate>
<TextBlock>
<Hyperlink NavigateUri="{Binding AUri}">
<Run Text="{Binding A}"/>
</Hyperlink>
<Run Text=" is doing "/>
<Hyperlink NavigateUri="{Binding BUri}">
<Run Text="{Binding B}"/>
</Hyperlink>
</TextBlock>
</DataTemplate>
</GridViewColumn.CellTemplate>
</GridViewColumn>
string inlineExpression = "Once i saw a little <bold>bird</bold>, <span>go <bold>hop, hop, hop</bold></span>.";
InlineExpression.SetInlineExpression(myTextBlock1, inlineExpression);
string inlineExpression=“有一次我看到一只小鸟,跳啊跳啊跳。”;
SetInlineExpression(myTextBlock1,InlineExpression);
还支持以下样式:
string inlineExpression = "<run style="Theme.GrayText">Once i saw a little bird, go hop, hop, hop.</run>";
InlineExpression.SetInlineExpression(myTextBlock1, inlineExpression);
string inlineExpression=“有一次我看到一只小鸟,跳啊跳啊跳。”;
SetInlineExpression(myTextBlock1,InlineExpression);
您还可以以标准方式在XAML中使用此附加属性
以下是公开此属性的类的代码:
public class InlineExpression
{
public static readonly DependencyProperty InlineExpressionProperty = DependencyProperty.RegisterAttached(
"InlineExpression", typeof(string), typeof(TextBlock), new FrameworkPropertyMetadata(string.Empty, FrameworkPropertyMetadataOptions.AffectsMeasure));
public static void SetInlineExpression(TextBlock textBlock, string value)
{
textBlock.SetValue(InlineExpressionProperty, value);
textBlock.Inlines.Clear();
if (string.IsNullOrEmpty(value))
return;
var descriptions = GetInlineDescriptions(value);
if (descriptions.Length == 0)
return;
var inlines = GetInlines(textBlock, descriptions);
if (inlines.Length == 0)
return;
textBlock.Inlines.AddRange(inlines);
}
public static string GetInlineExpression(TextBlock textBlock)
{
return (string)textBlock.GetValue(InlineExpressionProperty);
}
enum InlineType
{
Run,
LineBreak,
Span,
Bold,
Italic,
Hyperlink,
Underline
}
class InlineDescription
{
public InlineType Type { get; set; }
public string Text { get; set; }
public InlineDescription[] Inlines { get; set; }
public string StyleName { get; set; }
}
private static Inline[] GetInlines(FrameworkElement element, IEnumerable<InlineDescription> inlineDescriptions)
{
var inlines = new List<Inline>();
foreach (var description in inlineDescriptions)
{
var inline = GetInline(element, description);
if (inline != null)
inlines.Add(inline);
}
return inlines.ToArray();
}
private static Inline GetInline(FrameworkElement element, InlineDescription description)
{
Style style = null;
if (!string.IsNullOrEmpty(description.StyleName))
{
style = element.FindResource(description.StyleName) as Style;
if (style == null)
throw new InvalidOperationException("The style '" + description.StyleName + "' cannot be found");
}
Inline inline = null;
switch (description.Type)
{
case InlineType.Run:
var run = new Run(description.Text);
inline = run;
break;
case InlineType.LineBreak:
var lineBreak = new LineBreak();
inline = lineBreak;
break;
case InlineType.Span:
var span = new Span();
inline = span;
break;
case InlineType.Bold:
var bold = new Bold();
inline = bold;
break;
case InlineType.Italic:
var italic = new Italic();
inline = italic;
break;
case InlineType.Hyperlink:
var hyperlink = new Hyperlink();
inline = hyperlink;
break;
case InlineType.Underline:
var underline = new Underline();
inline = underline;
break;
}
if (inline != null)
{
var span = inline as Span;
if (span != null)
{
var childInlines = new List<Inline>();
foreach (var inlineDescription in description.Inlines)
{
var childInline = GetInline(element, inlineDescription);
if (childInline == null)
continue;
childInlines.Add(childInline);
}
span.Inlines.AddRange(childInlines);
}
if (style != null)
inline.Style = style;
}
return inline;
}
private static InlineDescription[] GetInlineDescriptions(string inlineExpression)
{
if (inlineExpression == null)
return new InlineDescription[0];
inlineExpression = inlineExpression.Trim();
if (inlineExpression.Length == 0)
return new InlineDescription[0];
inlineExpression = inlineExpression.Insert(0, @"<root>");
inlineExpression = inlineExpression.Insert(inlineExpression.Length, @"</root>");
var xmlTextReader = new XmlTextReader(new StringReader(inlineExpression));
var xmlDocument = new XmlDocument();
xmlDocument.Load(xmlTextReader);
var rootElement = xmlDocument.DocumentElement;
if (rootElement == null)
return new InlineDescription[0];
var inlineDescriptions = new List<InlineDescription>();
foreach (XmlNode childNode in rootElement.ChildNodes)
{
var description = GetInlineDescription(childNode);
if (description == null)
continue;
inlineDescriptions.Add(description);
}
return inlineDescriptions.ToArray();
}
private static InlineDescription GetInlineDescription(XmlNode node)
{
var element = node as XmlElement;
if (element != null)
return GetInlineDescription(element);
var text = node as XmlText;
if (text != null)
return GetInlineDescription(text);
return null;
}
private static InlineDescription GetInlineDescription(XmlElement element)
{
InlineType type;
var elementName = element.Name.ToLower();
switch (elementName)
{
case "run":
type = InlineType.Run;
break;
case "linebreak":
type = InlineType.LineBreak;
break;
case "span":
type = InlineType.Span;
break;
case "bold":
type = InlineType.Bold;
break;
case "italic":
type = InlineType.Italic;
break;
case "hyperlink":
type = InlineType.Hyperlink;
break;
case "underline":
type = InlineType.Underline;
break;
default:
return null;
}
string styleName = null;
var attribute = element.GetAttributeNode("style");
if (attribute != null)
styleName = attribute.Value;
string text = null;
var childDescriptions = new List<InlineDescription>();
if (type == InlineType.Run || type == InlineType.LineBreak)
{
text = element.InnerText;
}
else
{
foreach (XmlNode childNode in element.ChildNodes)
{
var childDescription = GetInlineDescription(childNode);
if (childDescription == null)
continue;
childDescriptions.Add(childDescription);
}
}
var inlineDescription = new InlineDescription
{
Type = type,
StyleName = styleName,
Text = text,
Inlines = childDescriptions.ToArray()
};
return inlineDescription;
}
private static InlineDescription GetInlineDescription(XmlText text)
{
var value = text.Value;
if (string.IsNullOrEmpty(value))
return null;
var inlineDescription = new InlineDescription
{
Type = InlineType.Run,
Text = value
};
return inlineDescription;
}
}
公共类InlineExpression
{
公共静态只读DependencyProperty InlineExpressionProperty=DependencyProperty.RegisterAttached(
“InlineExpression”、typeof(string)、typeof(TextBlock)、新FrameworkPropertyMetadata(string.Empty、FrameworkPropertyMetadataOptions.AffectsMeasure));
公共静态void SetInlineExpression(TextBlock TextBlock,字符串值)
{
SetValue(InlineExpressionProperty,值);
textBlock.Inlines.Clear();
if(string.IsNullOrEmpty(value))
返回;
变量描述=GetInlineDescriptions(值);
如果(descriptions.Length==0)
返回;
var inlines=GetInlines(文本块,描述);
如果(inlines.Length==0)
返回;
textBlock.Inlines.AddRange(Inlines);
}
公共静态字符串GetInlineExpression(TextBlock TextBlock)
{
返回(字符串)textBlock.GetValue(InlineExpressionProperty);
}
枚举内联类型
{
跑
断线,
跨度
大胆的
斜体,
超链接,
强调
}
类内联描述
{
公共InlineType类型{get;set;}
公共字符串文本{get;set;}
public InlineDescription[]Inlines{get;set;}
公共字符串样式名{get;set;}
}
私有静态内联[]GetInlines(FrameworkElement元素,IEnumerable inlineDescriptions)
{
var inlines=新列表();
foreach(inlineDescriptions中的变量描述)
{
var inline=GetInline(元素,描述);
如果(内联!=null)
inlines.Add(inline);
}
返回inlines.ToArray();
}
私有静态内联GetInline(FrameworkElement元素,InlineDescription)
{
Style=null;
如果(!string.IsNullOrEmpty(description.StyleName))
{
style=element.FindResource(description.StyleName)作为样式;
if(style==null)
抛出新的InvalidOperationException(“找不到样式“”+description.StyleName+”);
}
内联=空;
开关(说明.类型)
{
案例InlineType.Run:
var run=新运行(description.Text);
内联=运行;
打破
案例InlineType.LineBreak:
var lineBreak=新的lineBreak();
内联=换行符;
打破
案例InlineType.Span:
var span=新span();
内联=跨度;
打破
大小写InlineType.Bold:
var bold=new bold();
内联=粗体;
打破
大小写InlineType.Italic:
var italic=新斜体();
内联=斜体;
打破
案例InlineType.Hyperlink:
var hyperlink=新的hyperlink();
内联=超链接;
打破
大小写InlineType.Underline:
var underline=新下划线();
内联=下划线;
打破
}
如果(内联!=null)
{
var span=内联为span;
if(span!=null)
{
var childInlines=新列表();
foreach(description.Inlines中的变量inlineDescription)
{
var childInline=GetInline(元素,inlineDescription);
if(childInline==null)
继续;
添加(childInline);
}
span.Inlines.AddRange(childInlines);
}
如果(样式!=null)
inline.Style=Style;
}
内联返回;
}
私有静态InlineDescription[]GetInlineDescriptions(字符串inlineExpression)
{
if(inlineExpression==null)
返回新的InlineDescription[0];
inlineExpression=inlineExpression.Trim();
if(inlineExpression.Length==0)
返回新的InlineDescription[0];
inlineExpression=inlineExpression.Insert(0,@“”);
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