C# IHtmlElement.Attributes方法代码示例

        /// <summary>
        /// 尝试生成元素开始标签的HTML形式
        /// </summary>
        /// <param name="element">要生成HTML的元素</param>
        /// <param name="selfClosed">指示是否应产生自结束符号</param>
        /// <returns></returns>
        public static string GenerateTagHtml( IHtmlElement element, bool selfClosed )
        {
            if ( element == null )
            throw new ArgumentNullException( "element" );

              var builder = new StringBuilder( 20 );

              builder.Append( "<" );
              builder.Append( element.Name );

              foreach ( var attribute in element.Attributes() )
              {
            builder.Append( " " );
            builder.Append( attribute.Name );
            if ( attribute.AttributeValue != null )
            {
              var specification = element.Document.HtmlSpecification;

              if ( ( specification.IsUriValue( attribute ) || specification.IsScriptValue( attribute ) ) && !attribute.AttributeValue.Contains( '"' ) )
            builder.Append( "=\"" ).Append( attribute.AttributeValue ).Append( "\"" );
              else
            builder.Append( "=\"" ).Append( HtmlEncoding.HtmlAttributeEncode( attribute.AttributeValue ) ).Append( "\"" );
            }
              }

              if ( selfClosed )
            builder.Append( " /" );

              builder.Append( ">" );
              return builder.ToString();
        }

    /// <summary>
    /// 对元素进行数据绑定
    /// </summary>
    /// <param name="element">需要绑定数据的元素</param>
    /// <param name="context">绑定上下文</param>
    /// <returns>返回是否对元素进行了不可逆转的操作（例如移除），故而禁止后续的绑定操作</returns>
    public void BindElement( HtmlBindingContext context, IHtmlElement element )
    {

      if ( element.Attribute( "binding-visible" ) != null )
      {
        var visible = element.Attribute( "binding-visible" ).Value();
        if ( visible.EqualsIgnoreCase( "false" ) || visible.EqualsIgnoreCase( "hidden" ) || visible.EqualsIgnoreCase( "invisible" ) )
        {
          element.Remove();

          context.CancelChildsBinding = context.BindCompleted = true;
        }
      }





      {
        //处理样式类
        var classAttribute = element.Attribute( classAttributePrefix );
        if ( classAttribute != null )
        {
          if ( !string.IsNullOrWhiteSpace( classAttribute.AttributeValue ) )
          {

            var classes = Regulars.whiteSpaceSeparatorRegex.Split( classAttribute.AttributeValue ).Where( c => c != "" ).ToArray();
            if ( classes.Any() )
              element.Class( classes );
          }

          element.RemoveAttribute( classAttributePrefix );
        }

      }

      {
        var classAttributes = element.Attributes().Where( a => a.Name.StartsWith( classAttributePrefix ) ).ToArray();
        BindElementClasses( element, classAttributes );
      }

      //处理CSS样式
      var styleAttributes = element.Attributes().Where( a => a.Name.StartsWith( styleAttributePrefix ) ).ToArray();
      BindElementStyles( element, styleAttributes );
    }

 public IEnumerable<IBinding> CreateBindings( BindingManager manager, IHtmlElement element )
 {
   if ( element.Name.EqualsIgnoreCase( "binding" ) )
   {
     return new[] { CreateElementBinding( element ) };
   }
   else
   {
     return element.Attributes().Select( a => CreateAttributeBinding( a ) ).NotNull();
   }
 }

    /// <summary>
    /// 实现 BindElement 方法对元素的 URL 属性进行处理
    /// </summary>
    /// <param name="context">当前绑定上下文</param>
    /// <param name="element">当前元素上下文</param>
    public void BindElement( HtmlBindingContext context, IHtmlElement element )
    {
      if ( ProcessActionLink( element ) )//对元素进行 Action URL 处理，若处理成功，则跳过元素。
        return;

      element.Attributes().ToArray()
        .Where( attribute => Specification.IsUriValue( attribute ) )
        .ForAll( attribute => UrlHelper.ResolveUri( attribute, DocumentPath ) );
    }

        private void CustomRouteValues( IHtmlElement element, string prefix, RouteValueDictionary routeValues, bool clearRouteAttributes )
        {
            foreach ( var attribute in element.Attributes().Where( a => a.Name.StartsWith( prefix ) ).ToArray() )
              {

            var key = attribute.Name.Substring( prefix.Length );
            var value = attribute.Value() ?? RouteData.Values[key];

            routeValues.Remove( key );

            routeValues.Add( key, value );

            if ( clearRouteAttributes )
              attribute.Remove();
              }
        }

        /// <summary>
        /// 对元素进行数据绑定
        /// </summary>
        /// <param name="element">需要绑定数据的元素</param>
        /// <param name="context">绑定上下文</param>
        /// <param name="dataContext">数据上下文</param>
        /// <returns>是否进行了绑定</returns>
        public bool BindElement( IHtmlElement element, HtmlBindingContext context, out object dataContext )
        {
            dataContext = null;

              if ( element.Attribute( "binding-visible" ) != null )
              {
            var visible = element.Attribute( "binding-visible" ).Value();
            if ( visible.EqualsIgnoreCase( "false" ) || visible.EqualsIgnoreCase( "hidden" ) || visible.EqualsIgnoreCase( "invisible" ) )
              element.Remove();
            return true;
              }

              //处理样式类
              {
            var classAttribute = element.Attribute( classAttributeName );
            if ( classAttribute != null )
            {
              if ( !string.IsNullOrWhiteSpace( classAttribute.AttributeValue ) )
              {

            var classes = Regulars.whiteSpaceSeparatorRegex.Split( classAttribute.AttributeValue ).Where( c => c != "" ).ToArray();
            if ( classes.Any() )
              element.Class( classes );
              }

              element.RemoveAttribute( classAttributeName );
            }
              }

              //处理CSS样式
              var styleAttributes = element.Attributes().Where( a => a.Name.StartsWith( styleAttributePrefix ) ).ToArray();
              if ( styleAttributes.Any() )
            BindElementStyles( element, styleAttributes );

              if ( !element.Name.EqualsIgnoreCase( "view" ) && !element.Name.EqualsIgnoreCase( "binding" ) )
              {
            var dataContextExpression = AttributeExpression.ParseExpression( element.Attribute( "datacontext" ) );
            if ( dataContextExpression != null )
              dataContext = GetDataObject( dataContextExpression, context );

            return false;
              }

              var expression = new AttributeExpression( element );

              object dataObject = GetDataObject( expression, context );

              if ( dataObject == null )
            return false;

              var format = element.Attribute( "format" ).Value();

              //绑定到客户端脚本对象
              var variableName = element.Attribute( "var" ).Value() ?? element.Attribute( "variable" ).Value();
              if ( variableName != null )
              {

            if ( format != null )
              dataObject = string.Format( format, dataObject );

            var hostName = element.Attribute( "host" ).Value();

            var script = (string) null;

            if ( hostName == null )
              script = string.Format( "(function(){{ this['{0}'] = {1} }})();", variableName, ToJson( dataObject ) );

            else
              script = string.Format( "(function(){{ this['{0}'] = {1} }})();", variableName, ToJson( dataObject ) );

            element.ReplaceWith( string.Format( "<script type=\"text/javascript\">{0}</script>", script ) );
            return true;
              }

              //绑定为 HTML 文本
              var bindValue = string.Format( format ?? "{0}", dataObject );

              var attributeName = element.Attribute( "attribute" ).Value() ?? element.Attribute( "attr" ).Value();
              if ( attributeName != null )
              {
            var nextElement = element.NextElement();
            if ( nextElement == null )
              return false;

            nextElement.SetAttribute( attributeName, bindValue );
            return true;
              }

              element.ReplaceWith( bindValue );
              return true;
        }

 /// <summary>
 /// 从元素创建属性表达式
 /// </summary>
 /// <param name="element">要创建属性表达式的元素</param>
 public AttributeExpression( IHtmlElement element )
     : this(element.Name, element.Attributes().ToDictionary( a => a.Name, a => a.AttributeValue, StringComparer.OrdinalIgnoreCase ))
 {
 }

 private IBinding CreateElementBinding( IHtmlElement element )
 {
   return new Binding( element, element.Attributes().ToDictionary( a => a.Name, a => a.AttributeValue ) );
 }

        /// <summary>
        /// 对元素进行数据绑定
        /// </summary>
        /// <param name="element">要绑定数据的元素</param>
        private void BindElement( IHtmlElement element )
        {
            element.Attributes().ToArray().ForAll( a => BindAttribute( a ) );

              object dataContext = null;
              Binders.FirstOrDefault( b => b.BindElement( element, this, out dataContext ) );

              if ( dataContext != null )
              {
            _bindingDataContexts.Push( new BindingDataContext { DataContext = dataContext, Scope = element } );

            var listData = dataContext as IEnumerable;
            if ( listData != null && IsListItem( element ) )
              BindElementList( element, listData.Cast<object>().ToArray() );

            else
              BindChilds( element );

            _bindingDataContexts.Pop();
              }
              else
            BindChilds( element );
        }