protected virtual IHtmlContent GenerateDisplay(
ModelExplorer modelExplorer,
string htmlFieldName,
string templateName,
object additionalViewData)
{
var modelEnum = modelExplorer.Model as Enum;
if (modelExplorer.Metadata.IsEnum && modelEnum != null)
{
var value = modelEnum.ToString("d");
var enumGrouped = modelExplorer.Metadata.EnumGroupedDisplayNamesAndValues;
Debug.Assert(enumGrouped != null);
foreach (var kvp in enumGrouped)
{
if (kvp.Value == value)
{
// Creates a ModelExplorer with the same Metadata except that the Model is a string instead of an Enum
modelExplorer = modelExplorer.GetExplorerForModel(kvp.Key.Name);
break;
}
}
}
var templateBuilder = new TemplateBuilder(
_viewEngine,
_bufferScope,
ViewContext,
ViewData,
modelExplorer,
htmlFieldName,
templateName,
readOnly: true,
additionalViewData: additionalViewData);
return(templateBuilder.Build());
}
public static IHtmlContent CollectionTemplate(IHtmlHelper htmlHelper)
{
var viewData = htmlHelper.ViewData;
var model = viewData.Model;
if (model == null)
{
return(HtmlString.Empty);
}
var enumerable = model as IEnumerable;
if (enumerable == null)
{
// Only way we could reach here is if user passed templateName: "Collection" to an Editor() overload.
throw new InvalidOperationException(Resources.FormatTemplates_TypeMustImplementIEnumerable(
"Collection", model.GetType().FullName, typeof(IEnumerable).FullName));
}
var elementMetadata = htmlHelper.ViewData.ModelMetadata.ElementMetadata;
Debug.Assert(elementMetadata != null);
var typeInCollectionIsNullableValueType = elementMetadata.IsNullableValueType;
var serviceProvider = htmlHelper.ViewContext.HttpContext.RequestServices;
var metadataProvider = serviceProvider.GetRequiredService <IModelMetadataProvider>();
// Use typeof(string) instead of typeof(object) for IEnumerable collections. Neither type is Nullable<T>.
if (elementMetadata.ModelType == typeof(object))
{
elementMetadata = metadataProvider.GetMetadataForType(typeof(string));
}
var oldPrefix = viewData.TemplateInfo.HtmlFieldPrefix;
try
{
viewData.TemplateInfo.HtmlFieldPrefix = string.Empty;
var collection = model as ICollection;
var result = collection == null ? new HtmlContentBuilder() : new HtmlContentBuilder(collection.Count);
var viewEngine = serviceProvider.GetRequiredService <ICompositeViewEngine>();
var viewBufferScope = serviceProvider.GetRequiredService <IViewBufferScope>();
var index = 0;
foreach (var item in enumerable)
{
var itemMetadata = elementMetadata;
if (item != null && !typeInCollectionIsNullableValueType)
{
itemMetadata = metadataProvider.GetMetadataForType(item.GetType());
}
var modelExplorer = new ModelExplorer(
metadataProvider,
container: htmlHelper.ViewData.ModelExplorer,
metadata: itemMetadata,
model: item);
var fieldName = string.Format(CultureInfo.InvariantCulture, "{0}[{1}]", oldPrefix, index++);
var templateBuilder = new TemplateBuilder(
viewEngine,
viewBufferScope,
htmlHelper.ViewContext,
htmlHelper.ViewData,
modelExplorer,
htmlFieldName: fieldName,
templateName: null,
readOnly: false,
additionalViewData: null);
result.AppendHtml(templateBuilder.Build());
}
return(result);
}
finally
{
viewData.TemplateInfo.HtmlFieldPrefix = oldPrefix;
}
}
public static IHtmlContent ObjectTemplate(IHtmlHelper htmlHelper)
{
var viewData = htmlHelper.ViewData;
var templateInfo = viewData.TemplateInfo;
var modelExplorer = viewData.ModelExplorer;
if (templateInfo.TemplateDepth > 1)
{
if (modelExplorer.Model == null)
{
return(new HtmlString(modelExplorer.Metadata.NullDisplayText));
}
var text = modelExplorer.GetSimpleDisplayText();
if (modelExplorer.Metadata.HtmlEncode)
{
return(new StringHtmlContent(text));
}
return(new HtmlString(text));
}
var serviceProvider = htmlHelper.ViewContext.HttpContext.RequestServices;
var viewEngine = serviceProvider.GetRequiredService <ICompositeViewEngine>();
var viewBufferScope = serviceProvider.GetRequiredService <IViewBufferScope>();
var content = new HtmlContentBuilder(modelExplorer.Metadata.Properties.Count);
foreach (var propertyExplorer in modelExplorer.PropertiesInternal)
{
var propertyMetadata = propertyExplorer.Metadata;
if (!ShouldShow(propertyExplorer, templateInfo))
{
continue;
}
var templateBuilder = new TemplateBuilder(
viewEngine,
viewBufferScope,
htmlHelper.ViewContext,
htmlHelper.ViewData,
propertyExplorer,
htmlFieldName: propertyMetadata.PropertyName,
templateName: null,
readOnly: false,
additionalViewData: null);
var templateBuilderResult = templateBuilder.Build();
if (!propertyMetadata.HideSurroundingHtml)
{
var label = htmlHelper.Label(propertyMetadata.PropertyName, labelText: null, htmlAttributes: null);
using (var writer = new HasContentTextWriter())
{
label.WriteTo(writer, PassThroughHtmlEncoder.Default);
if (writer.HasContent)
{
var labelTag = new TagBuilder("div");
labelTag.AddCssClass("editor-label");
labelTag.InnerHtml.SetHtmlContent(label);
content.AppendLine(labelTag);
}
}
var valueDivTag = new TagBuilder("div");
valueDivTag.AddCssClass("editor-field");
valueDivTag.InnerHtml.AppendHtml(templateBuilderResult);
valueDivTag.InnerHtml.AppendHtml(" ");
valueDivTag.InnerHtml.AppendHtml(htmlHelper.ValidationMessage(
propertyMetadata.PropertyName,
message: null,
htmlAttributes: null,
tag: null));
content.AppendLine(valueDivTag);
}
else
{
content.AppendHtml(templateBuilderResult);
}
}
return(content);
}
public static IHtmlContent ObjectTemplate(IHtmlHelper htmlHelper)
{
var viewData = htmlHelper.ViewData;
var templateInfo = viewData.TemplateInfo;
var modelExplorer = viewData.ModelExplorer;
if (modelExplorer.Model == null)
{
return(new HtmlString(modelExplorer.Metadata.NullDisplayText));
}
if (templateInfo.TemplateDepth > 1)
{
var text = modelExplorer.GetSimpleDisplayText();
if (modelExplorer.Metadata.HtmlEncode)
{
text = htmlHelper.Encode(text);
}
return(new HtmlString(text));
}
var serviceProvider = htmlHelper.ViewContext.HttpContext.RequestServices;
var viewEngine = serviceProvider.GetRequiredService <ICompositeViewEngine>();
var viewBufferScope = serviceProvider.GetRequiredService <IViewBufferScope>();
var content = new HtmlContentBuilder(modelExplorer.Metadata.Properties.Count);
foreach (var propertyExplorer in modelExplorer.PropertiesInternal)
{
var propertyMetadata = propertyExplorer.Metadata;
if (!ShouldShow(propertyExplorer, templateInfo))
{
continue;
}
var templateBuilder = new TemplateBuilder(
viewEngine,
viewBufferScope,
htmlHelper.ViewContext,
htmlHelper.ViewData,
propertyExplorer,
htmlFieldName: propertyMetadata.PropertyName,
templateName: null,
readOnly: true,
additionalViewData: null);
var templateBuilderResult = templateBuilder.Build();
if (!propertyMetadata.HideSurroundingHtml)
{
var label = propertyMetadata.GetDisplayName();
if (!string.IsNullOrEmpty(label))
{
var labelTag = new TagBuilder("div");
labelTag.InnerHtml.SetContent(label);
labelTag.AddCssClass("display-label");
content.AppendLine(labelTag);
}
var valueDivTag = new TagBuilder("div");
valueDivTag.AddCssClass("display-field");
valueDivTag.InnerHtml.SetHtmlContent(templateBuilderResult);
content.AppendLine(valueDivTag);
}
else
{
content.AppendHtml(templateBuilderResult);
}
}
return(content);
}