/// <summary>
/// 对元素属性进行绑定操作
/// </summary>
/// <param name="attribute">要绑定的元素属性</param>
/// <param name="context">绑定上下文</param>
/// <returns>是否成功绑定</returns>
public bool BindAttribute(IHtmlAttribute attribute, HtmlBindingContext context)
{
if (attribute.Name == "datacontext")
{
return(false);
}
var expression = AttributeExpression.ParseExpression(attribute);
if (expression == null || !expression.Name.EqualsIgnoreCase("Binding"))
{
return(false);
}
var dataObject = GetDataObject(expression, context);
if (dataObject == null)
{
attribute.Remove();
return(true);
}
string value = GetBindingValue(expression, dataObject);
attribute.SetValue(value);
return(true);
}
/// <summary>
/// 设置属性的值，这会产生一个新的属性，并返回
/// </summary>
/// <param name="attribute">要设置值的属性</param>
/// <param name="value">设置的值</param>
/// <returns>所创建的新属性</returns>
public static IHtmlAttribute SetValue(this IHtmlAttribute attribute, string value)
{
if (attribute == null)
{
throw new ArgumentNullException("attribute");
}
var element = attribute.Element;
var name = attribute.Name;
if (element == null)
{
throw new InvalidOperationException();
}
attribute.Remove();
return(element.AddAttribute(name, value));
}
/// <summary>
/// 进行属性绑定
/// </summary>
/// <param name="attribute">要绑定的属性</param>
protected virtual void BindAttribute(IHtmlAttribute attribute)
{
var expression = BindingExpression.ParseExpression(attribute.Value());
if (expression == null)
{
return;
}
var value = GetValue(expression);
if (value == null)
{
attribute.Remove();
}
else
{
attribute.SetValue(value.ToString());
}
}
/// <summary>
/// 对元素属性进行绑定操作
/// </summary>
/// <param name="attribute">要绑定的元素属性</param>
/// <param name="context">绑定上下文</param>
/// <returns>是否成功绑定</returns>
public bool BindAttribute( IHtmlAttribute attribute, HtmlBindingContext context )
{
if ( attribute.Name == "datacontext" )
return false;
var expression = AttributeExpression.ParseExpression( attribute );
if ( expression == null || !expression.Name.EqualsIgnoreCase( "Binding" ) )
return false;
var dataObject = GetDataObject( expression, context );
if ( dataObject == null )
{
attribute.Remove();
return true;
}
string value = GetBindingValue( expression, dataObject );
attribute.SetValue( value );
return true;
}