/// <summary>
/// 设置属性值
/// </summary>
/// <param name="element">要设置属性的元素</param>
/// <param name="attributeName">属性名</param>
/// <param name="evaluator">用于替换属性值的计算函数</param>
/// <returns></returns>
public static IHtmlElement SetAttribute(this IHtmlElement element, string attributeName, Func <string, string> evaluator)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (evaluator == null)
{
throw new ArgumentNullException("evaluator");
}
var attribute = element.Attribute(attributeName);
var value = attribute.Value();
if (value == null)
{
return(element);
}
value = evaluator(value);
attribute.Remove();
element.AddAttribute(attributeName, value);
return(element);
}
/// <summary>
/// 设置属性值
/// </summary>
/// <param name="element">要设置属性值的元素</param>
/// <param name="attributeName">属性名</param>
/// <param name="value">属性值</param>
/// <param name="attribute">设置好的属性</param>
/// <returns>设置了属性的元素</returns>
public static IHtmlElement SetAttribute(this IHtmlElement element, string attributeName, string value, out IHtmlAttribute attribute)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (attributeName == null)
{
throw new ArgumentNullException("attributeName");
}
lock (element.SyncRoot)
{
var _attribute = element.Attribute(attributeName);
if (_attribute != null)
{
_attribute.Remove();
}
attribute = element.AddAttribute(attributeName, value);
}
return(element);
}
public void Inject(HtmlNodeElement element)
{
IHtmlElement input = element.Children.FirstOrDefault(x => x.TagName == "input");
if (input != null)
{
HtmlParser parser = new HtmlParser();
if (input.GetAttribute("name")?.Value != null)
{
IHtmlElement validationMessageTag;
using (var writer = new System.IO.StringWriter())
{
_htmlHelper.ValidationMessage(input.GetAttribute("name").Value, _options?.ValidationMessageAttributes?.ToDictionary()).WriteTo(writer, HtmlEncoder.Default);
validationMessageTag = parser.ParseString(writer.ToString()).FirstOrDefault();
}
using (var writer = new System.IO.StringWriter())
{
_htmlHelper.TextBox(input.GetAttribute("name").Value).WriteTo(writer, HtmlEncoder.Default);
IHtmlElement textBox = parser.ParseString(writer.ToString()).FirstOrDefault();
foreach (var attr in textBox.Attributes)
{
if (attr.Name.StartsWith("data"))
{
input.AddAttribute(attr);
}
}
}
element.AddAfter(input.UId, validationMessageTag);
}
}
int index = 0;
while (element.Children.Count > index)
{
if (element.Children[index] is IHtmlNodeElement)
{
Inject((HtmlNodeElement)element.Children[index]);
}
index++;
}
}
private HtmlPairTagsElement GetFormGroup(PropertyInfo propInfo)
{
IHtmlElement input = GetProperInput(propInfo);
HtmlNodeElement inputWrapper = new HtmlNodeElement("div");
if (propInfo.GetCustomAttribute <HtmlInputAttribute>() != null)
{
input.AddAttribute(propInfo.GetCustomAttribute <HtmlInputAttribute>().Name);
}
inputWrapper.Append(input);
// TODO Add validation element
if (_options.InputWrapperAttributes != null)
{
inputWrapper.AddRangeAttributes(_options.InputWrapperAttributes);
}
HtmlNodeElement label = GetLabel(propInfo);
HtmlNodeElement formGroup = new HtmlNodeElement("div");
formGroup.Append(label);
if (_options.FormGroupAttributes != null)
{
formGroup.AddRangeAttributes(_options.FormGroupAttributes);
}
formGroup.Append(inputWrapper);
if (_options.FormGroupTemplateFunc != null)
{
formGroup = _options.FormGroupTemplateFunc(formGroup);
}
return(formGroup);
}
/// <summary>
/// 设置属性值
/// </summary>
/// <param name="element">要设置属性值的元素</param>
/// <param name="attributeName">属性名</param>
/// <param name="value">属性值</param>
/// <returns>设置了属性的元素</returns>
public static IHtmlElement SetAttribute(this IHtmlElement element, string attributeName, string value)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
if (attributeName == null)
{
throw new ArgumentNullException("attributeName");
}
var attribute = element.Attribute(attributeName);
if (attribute != null)
{
attribute.Remove();
}
element.AddAttribute(attributeName, value);
return(element);
}
