public static async Task <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($"Collection, {model.GetType().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(await templateBuilder.Build());
}
return(result);
}
finally
{
viewData.TemplateInfo.HtmlFieldPrefix = oldPrefix;
}
}
public static async Task <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.Properties)
{
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 = await 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);
}
public static async Task <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.Properties)
{
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 = await templateBuilder.Build();
if (!propertyMetadata.HideSurroundingHtml)
{
var label = htmlHelper.Label(propertyMetadata.PropertyName, labelText: null, htmlAttributes: null);
using (var writer = new HasContentTextWriter())
{
label.WriteTo(writer, HtmlEncoder.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);
}
/// <summary>
/// Process
/// </summary>
/// <param name="context">Context</param>
/// <param name="output">Output</param>
public override async Task ProcessAsync(TagHelperContext context, TagHelperOutput output)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (output == null)
{
throw new ArgumentNullException(nameof(output));
}
//clear the output
output.SuppressOutput();
//disabled attribute
bool.TryParse(IsDisabled, out bool disabled);
if (disabled)
{
var d = new TagHelperAttribute("disabled", "disabled");
output.Attributes.Add(d);
}
//required asterisk
bool.TryParse(IsRequired, out bool required);
if (required)
{
output.PreElement.SetHtmlContent("<div class='input-group input-group-required'>");
output.PostElement.SetHtmlContent("<div class=\"input-group-btn\"><span class=\"required\">*</span></div></div>");
}
//contextualize IHtmlHelper
var viewContextAware = _htmlHelper as IViewContextAware;
viewContextAware?.Contextualize(ViewContext);
//add form-control class
bool.TryParse(RenderFormControlClass, out bool renderFormControlClass);
object htmlAttributes = null;
if (string.IsNullOrEmpty(RenderFormControlClass) && For.Metadata.ModelType.Name.Equals("String") || renderFormControlClass)
{
htmlAttributes = new { @class = "form-control k-input" }
}
;
var viewEngine = GetPrivateFieldValue(_htmlHelper, "_viewEngine") as IViewEngine;
var bufferScope = GetPrivateFieldValue(_htmlHelper, "_bufferScope") as IViewBufferScope;
if (SelectItems != null)
{
if (SelectItems.Any())
{
if (_htmlHelper.ViewData.ContainsKey("SelectList"))
{
_htmlHelper.ViewData["SelectList"] = SelectItems;
}
else
{
_htmlHelper.ViewData.Add("SelectList", SelectItems);
}
}
else
{
if (_htmlHelper.ViewData.ContainsKey("SelectList"))
{
_htmlHelper.ViewData["SelectList"] = new List <SelectListItem>();
}
else
{
_htmlHelper.ViewData.Add("SelectList", new List <SelectListItem>());
}
}
}
var templateBuilder = new TemplateBuilder(
viewEngine,
bufferScope,
_htmlHelper.ViewContext,
_htmlHelper.ViewData,
For.ModelExplorer,
For.Name,
Template,
readOnly: false,
additionalViewData: new { htmlAttributes, postfix = this.Postfix });
var htmlOutput = await templateBuilder.Build();
output.Content.SetHtmlContent(htmlOutput.RenderHtmlContent());
}
