/// <summary>
/// 提供数据绑定的核心方法。
/// </summary>
/// <param name="context">绑定上下文</param>
/// <param name="path">绑定路径</param>
/// <param name="value">绑定值</param>
/// <param name="nullBehavior">为空时执行的操作</param>
private static void BindCore(this IHtmlElement element, string path, string value, BindingNullBehavior nullBehavior)
{
if (value == null)
{
switch (nullBehavior)
{
case BindingNullBehavior.Ignore:
break;
case BindingNullBehavior.Hidden:
BindingContext.Action(element, e => e.Style().SetValue("visibility", "hidden"));
break;
case BindingNullBehavior.Remove:
BindingContext.Action(element, e => e.Remove());
break;
case BindingNullBehavior.DisplayNone:
BindingContext.Action(element, e => e.Style().SetValue("display", "none"));
break;
default:
throw new NotSupportedException();
}
return;
}
var attributeMatch = attributePathRegex.Match(path);
if (attributeMatch.Success)
{
string attributeName = attributeMatch.Groups["name"].Value;
BindingContext.Action(element, e => element.SetAttribute(attributeName, value));
}
if (path == "@:text")
{
BindingContext.Action(element, e => e.InnerText(value));
}
if (path == "@:html")
{
BindingContext.Action(element, e => e.InnerHtml(value));
}
return;
}
public static IHtmlElement Bind(this IHtmlElement element, BindingContext context, string path, object value, string format, BindingNullBehavior nullBehavior)
{
if (format == null)
{
format = "{0}";
}
string _value = null;
if (value != null)
{
_value = string.Format(format, value);
}
BindCore(element, path, _value, nullBehavior);
return(element);
}
/// <summary>
/// 绑定数据到指定位置
/// </summary>
/// <param name="element">要绑定数据的元素</param>
/// <param name="path">绑定路径</param>
/// <param name="value">绑定值</param>
/// <param name="format">用于绑定值的格式化字符串</param>
/// <param name="nullBehavior">定义当绑定值为空的行为</param>
/// <returns>被绑定的元素</returns>
public static IHtmlElement Bind(this IHtmlElement element, string path, object value, string format, BindingNullBehavior nullBehavior)
{
return(Bind(element, BindingContext.Current, path, value, format, nullBehavior));
}
/// <summary>
/// 绑定数据到指定位置，集合版本
/// </summary>
/// <param name="elements">要绑定数据的元素</param>
/// <param name="path">绑定路径</param>
/// <param name="value">绑定值</param>
/// <param name="format">用于绑定值的格式化字符串</param>
/// <param name="nullBehavior">定义当绑定值为空的行为</param>
/// <returns>被绑定的元素</returns>
public static IEnumerable <IHtmlElement> Bind(this IEnumerable <IHtmlElement> elements, string path, object value, string format, BindingNullBehavior nullBehavior)
{
return(elements.ForAll(e => e.Bind(path, value, format, nullBehavior)));
}
/// <summary>
/// 绑定数据到指定位置
/// </summary>
/// <param name="element">要绑定数据的元素</param>
/// <param name="path">绑定路径</param>
/// <param name="value">绑定值</param>
/// <param name="nullBehavior">定义当绑定值为空的行为</param>
/// <returns>被绑定的元素</returns>
public static IHtmlElement Bind(this IHtmlElement element, string path, object value, BindingNullBehavior nullBehavior)
{
return(Bind(element, path, value, null, nullBehavior));
}