public static string GetIndexerFieldName(this TemplateInfo templateInfo)
{
string fieldName = templateInfo.GetFullHtmlFieldName("Index");
fieldName = _stripIndexerRegex.Replace(fieldName, string.Empty);
if (fieldName.StartsWith("."))
{
fieldName = fieldName.Substring(1);
}
return(fieldName);
}
public static int GetIndex(this TemplateInfo templateInfo)
{
string fieldName = templateInfo.GetFullHtmlFieldName("Index");
var match = _stripIndexerRegex.Match(fieldName);
if (match.Success)
{
return(int.Parse(match.Groups["index"].Value));
}
return(0);
}
public static HtmlHelper <TModel> HtmlHelperFor <TModel>(this HtmlHelper htmlHelper, TModel model, string htmlFieldPrefix)
{
var viewDataContainer = CreateViewDataContainer(htmlHelper.ViewData, model);
TemplateInfo templateInfo = viewDataContainer.ViewData.TemplateInfo;
if (!String.IsNullOrEmpty(htmlFieldPrefix))
{
templateInfo.HtmlFieldPrefix = templateInfo.GetFullHtmlFieldName(htmlFieldPrefix);
}
ViewContext viewContext = htmlHelper.ViewContext;
ViewContext newViewContext = new ViewContext(viewContext.Controller.ControllerContext, viewContext.View, viewDataContainer.ViewData, viewContext.TempData, viewContext.Writer);
return(new HtmlHelper <TModel>(newViewContext, viewDataContainer, htmlHelper.RouteCollection));
}
public static HtmlHelper <TModel> ForModel <TModel>(
HtmlHelper currentHtml,
TModel model,
string?htmlFieldPrefix = null)
{
if (currentHtml is null)
{
throw new ArgumentNullException(nameof(currentHtml));
}
ViewDataDictionary currentViewData = currentHtml.ViewData;
// Cannot call new ViewDataDictionary<TModel>(currentViewData)
// because currentViewData.Model might be incompatible with TModel
var tempDictionary = new ViewDataDictionary(currentViewData)
{
Model = model
};
var container = new ViewDataContainer {
ViewData = new ViewDataDictionary <TModel>(tempDictionary)
{
// setting new TemplateInfo clears VisitedObjects cache
TemplateInfo = new TemplateInfo {
HtmlFieldPrefix = currentViewData.TemplateInfo.HtmlFieldPrefix
}
}
};
if (!String.IsNullOrEmpty(htmlFieldPrefix))
{
TemplateInfo templateInfo = container.ViewData.TemplateInfo;
templateInfo.HtmlFieldPrefix = templateInfo.GetFullHtmlFieldName(htmlFieldPrefix);
}
// new ViewContext resets FormContext
ViewContext newViewContext = currentHtml.ViewContext.Clone(viewData: container.ViewData);
return(currentHtml.Clone <TModel>(newViewContext, container));
}
public static string GetFullHtmlFieldName <TModel, TProperty>(this TemplateInfo templateInfo, Expression <Func <TModel, TProperty> > expression)
{
return(templateInfo.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression)));
}
public static string GetFullArrayHtmlFieldName(this TemplateInfo templateInfo, int index, string propertyName)
{
return(templateInfo.GetFullHtmlFieldName("") + "[" + index + "]" + "." + propertyName);
}
private string GetName <TPoperty>(Expression <Func <TModel, TPoperty> > expression)
{
return(_info.GetFullHtmlFieldName(ExpressionHelper.GetExpressionText(expression)));
}