public static IHtmlContent HiddenInputTemplate(IHtmlHelper htmlHelper)
{
var viewData = htmlHelper.ViewData;
var model = viewData.Model;
var result = new BufferedHtmlContent();
if (!viewData.ModelMetadata.HideSurroundingHtml)
{
result.Append(DefaultDisplayTemplates.StringTemplate(htmlHelper));
}
// Special-case opaque values and arbitrary binary data.
var modelAsByteArray = model as byte[];
if (modelAsByteArray != null)
{
model = Convert.ToBase64String(modelAsByteArray);
}
var htmlAttributesObject = viewData[HtmlAttributeKey];
var hiddenResult = htmlHelper.Hidden(expression: null, value: model, htmlAttributes: htmlAttributesObject);
result.Append(hiddenResult);
return(result);
}
protected virtual IHtmlContent GenerateCheckBox(
ModelExplorer modelExplorer,
string expression,
bool?isChecked,
object htmlAttributes)
{
var checkbox = _htmlGenerator.GenerateCheckBox(
ViewContext,
modelExplorer,
expression,
isChecked,
htmlAttributes);
var hiddenForCheckboxTag = _htmlGenerator.GenerateHiddenForCheckbox(ViewContext, modelExplorer, expression);
if (checkbox == null || hiddenForCheckboxTag == null)
{
return(HtmlString.Empty);
}
var checkboxContent = new BufferedHtmlContent().Append(checkbox);
if (ViewContext.FormContext.CanRenderAtEndOfForm)
{
ViewContext.FormContext.EndOfFormContent.Add(hiddenForCheckboxTag);
}
else
{
checkboxContent.Append(hiddenForCheckboxTag);
}
return(checkboxContent);
}
public void AppendString_AppendsAString()
{
// Arrange
var content = new BufferedHtmlContent();
// Act
content.Append("Hello");
// Assert
var result = Assert.Single(content.Entries);
Assert.IsType<string>(result);
}
public void AppendString_WrittenAsEncoded()
{
// Arrange
var content = new BufferedHtmlContent();
content.Append("Hello");
var writer = new StringWriter();
// Act
content.WriteTo(writer, new CommonTestEncoder());
// Assert
Assert.Equal("HtmlEncode[[Hello]]", writer.ToString());
}
public void AppendIHtmlContent_AppendsAsIs()
{
// Arrange
var content = new BufferedHtmlContent();
var writer = new StringWriter();
// Act
content.Append(new TestHtmlContent("Hello"));
// Assert
var result = Assert.Single(content.Entries);
var testHtmlContent = Assert.IsType<TestHtmlContent>(result);
testHtmlContent.WriteTo(writer, new CommonTestEncoder());
Assert.Equal("Written from TestHtmlContent: Hello", writer.ToString());
}
public static IHtmlContent CollectionTemplate(IHtmlHelper htmlHelper)
{
var viewData = htmlHelper.ViewData;
var model = viewData.Model;
if (model == null)
{
return HtmlString.Empty;
}
var collection = model as IEnumerable;
if (collection == 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 fieldNameBase = oldPrefix;
var result = new BufferedHtmlContent();
var viewEngine = serviceProvider.GetRequiredService<ICompositeViewEngine>();
var index = 0;
foreach (var item in collection)
{
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}]", fieldNameBase, index++);
var templateBuilder = new TemplateBuilder(
viewEngine,
htmlHelper.ViewContext,
htmlHelper.ViewData,
modelExplorer,
htmlFieldName: fieldName,
templateName: null,
readOnly: false,
additionalViewData: null);
result.Append(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 content = new BufferedHtmlContent();
foreach (var propertyExplorer in modelExplorer.Properties)
{
var propertyMetadata = propertyExplorer.Metadata;
if (!ShouldShow(propertyExplorer, templateInfo))
{
continue;
}
var templateBuilder = new TemplateBuilder(
viewEngine,
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);
if (!string.IsNullOrEmpty(label.ToString()))
{
var labelTag = new TagBuilder("div");
labelTag.AddCssClass("editor-label");
labelTag.InnerHtml.SetContent(label);
content.AppendLine(labelTag);
}
var valueDivTag = new TagBuilder("div");
valueDivTag.AddCssClass("editor-field");
valueDivTag.InnerHtml.Append(templateBuilderResult);
valueDivTag.InnerHtml.AppendHtml(" ");
valueDivTag.InnerHtml.Append(htmlHelper.ValidationMessage(
propertyMetadata.PropertyName,
message: null,
htmlAttributes: null,
tag: null));
content.AppendLine(valueDivTag);
}
else
{
content.Append(templateBuilderResult);
}
}
return content;
}
public static IHtmlContent HiddenInputTemplate(IHtmlHelper htmlHelper)
{
var viewData = htmlHelper.ViewData;
var model = viewData.Model;
var result = new BufferedHtmlContent();
if (!viewData.ModelMetadata.HideSurroundingHtml)
{
result.Append(DefaultDisplayTemplates.StringTemplate(htmlHelper));
}
// Special-case opaque values and arbitrary binary data.
var modelAsByteArray = model as byte[];
if (modelAsByteArray != null)
{
model = Convert.ToBase64String(modelAsByteArray);
}
var htmlAttributesObject = viewData[HtmlAttributeKey];
var hiddenResult = htmlHelper.Hidden(expression: null, value: model, htmlAttributes: htmlAttributesObject);
result.Append(hiddenResult);
return result;
}
public static IHtmlContent CollectionTemplate(IHtmlHelper htmlHelper)
{
var model = htmlHelper.ViewData.Model;
if (model == null)
{
return(HtmlString.Empty);
}
var collection = model as IEnumerable;
if (collection == null)
{
// Only way we could reach here is if user passed templateName: "Collection" to a Display() 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 = htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix;
try
{
htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix = string.Empty;
var fieldNameBase = oldPrefix;
var result = new BufferedHtmlContent();
var viewEngine = serviceProvider.GetRequiredService <ICompositeViewEngine>();
var index = 0;
foreach (var item in collection)
{
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}]", fieldNameBase, index++);
var templateBuilder = new TemplateBuilder(
viewEngine,
htmlHelper.ViewContext,
htmlHelper.ViewData,
modelExplorer,
htmlFieldName: fieldName,
templateName: null,
readOnly: true,
additionalViewData: null);
result.Append(templateBuilder.Build());
}
return(result);
}
finally
{
htmlHelper.ViewData.TemplateInfo.HtmlFieldPrefix = oldPrefix;
}
}
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 content = new BufferedHtmlContent();
foreach (var propertyExplorer in modelExplorer.Properties)
{
var propertyMetadata = propertyExplorer.Metadata;
if (!ShouldShow(propertyExplorer, templateInfo))
{
continue;
}
var templateBuilder = new TemplateBuilder(
viewEngine,
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.SetContent(templateBuilderResult);
content.AppendLine(valueDivTag);
}
else
{
content.Append(templateBuilderResult);
}
}
return(content);
}
public void CanAppendMultipleItems()
{
// Arrange
var content = new BufferedHtmlContent();
// Act
content.Append(new TestHtmlContent("hello"));
content.Append("Test");
// Assert
Assert.Equal(2, content.Entries.Count);
Assert.Equal("Written from TestHtmlContent: hello", content.Entries[0].ToString());
Assert.Equal("Test", content.Entries[1]);
}
public void WriteTo_WritesAllItems()
{
// Arrange
var content = new BufferedHtmlContent();
var writer = new StringWriter();
content.Append(new TestHtmlContent("Hello"));
content.Append("Test");
// Act
content.WriteTo(writer, new CommonTestEncoder());
// Assert
Assert.Equal(2, content.Entries.Count);
Assert.Equal("Written from TestHtmlContent: HelloHtmlEncode[[Test]]", writer.ToString());
}
public void Clear_DeletesAllItems()
{
// Arrange
var content = new BufferedHtmlContent();
content.Append(new TestHtmlContent("hello"));
content.Append("Test");
// Act
content.Clear();
// Assert
Assert.Equal(0, content.Entries.Count);
}