private void ApplyPaginationAttributes(TagHelperContext context)
{
//not specified any pager parameters
if (!context.AllAttributes.ContainsName(PageIndexAttributeName) &&
!context.AllAttributes.ContainsName(PageSizeAttributeName) &&
!context.AllAttributes.ContainsName(TotalAttributeName))
{
//get the model otherwise use the view model
ModelExplorer explorer = For?.ModelExplorer;
if (explorer == null)
{
explorer = ViewContext.ViewData.ModelExplorer;
}
//get the paging values from the model (support the popular pager paramter names)
var index = explorer.GetExplorerForProperty(PossiblePageIndexParameterNames);
var size = explorer.GetExplorerForProperty(PossiblePageSizeParameterNames);
var total = explorer.GetExplorerForProperty(PossibleTotalParameterNames);
if (index == null || size == null || total == null)
{
throw new ArgumentException($"A model MUST contain values for a page-index, page-size and total.");
}
PageIndex = Convert.ToInt32(index.Model);
PageSize = Convert.ToInt32(size.Model);
Total = Convert.ToInt32(total.Model);
}
}
/// <summary>
/// If the model derives from <see cref="ActionExecutionModel"/>, enrich the metadata before rendering the editor, else
/// use the default metadata.
/// </summary>
protected override IHtmlContent GenerateEditor(ModelExplorer modelExplorer, string htmlFieldName, string templateName, object additionalViewData)
{
if (modelExplorer == null)
{
throw new ArgumentNullException(nameof(modelExplorer));
}
if (htmlFieldName != null && modelExplorer.Container != null && typeof(ActionExecutionModel).IsAssignableFrom(modelExplorer.Container.ModelType))
{
var actionExecutionModel = (ActionExecutionModel)modelExplorer.Container.Model;
var compositeMetadataDetailsProvider = this.ViewContext.HttpContext.RequestServices.GetService <ICompositeMetadataDetailsProvider>();
var actionExecutionModelMetadata =
ActionExecutionModelMetadataFactory.GetMetadata(this.MetadataProvider, compositeMetadataDetailsProvider, actionExecutionModel);
var actionExecutionModelExplorer = new ModelExplorer(this.MetadataProvider, modelExplorer.Container, actionExecutionModelMetadata, actionExecutionModel);
var parameterExplorer = actionExecutionModelExplorer.GetExplorerForProperty(htmlFieldName);
return(base.GenerateEditor(parameterExplorer, htmlFieldName, templateName, additionalViewData));
}
return(base.GenerateEditor(modelExplorer, htmlFieldName, templateName, additionalViewData));
}
private bool ValidateProperties(
string currentModelKey,
ModelExplorer modelExplorer,
ValidationContext validationContext)
{
var isValid = true;
foreach (var property in modelExplorer.Metadata.Properties)
{
var propertyExplorer = modelExplorer.GetExplorerForProperty(property.PropertyName);
var propertyMetadata = propertyExplorer.Metadata;
var propertyValidationContext = new ValidationContext()
{
ModelValidationContext = ModelValidationContext.GetChildValidationContext(
validationContext.ModelValidationContext,
propertyExplorer),
Visited = validationContext.Visited
};
var propertyBindingName = propertyMetadata.BinderModelName ?? propertyMetadata.PropertyName;
var childKey = ModelBindingHelper.CreatePropertyModelName(currentModelKey, propertyBindingName);
if (!ValidateNonVisitedNodeAndChildren(
childKey,
propertyValidationContext,
validators: null))
{
isValid = false;
}
}
return(isValid);
}
private IList <ModelValidationNode> GetChildNodes(ValidationContext context, ModelExplorer modelExplorer)
{
var validationNode = context.ValidationNode;
// This is the trivial case where the node-tree that was built-up during binding already has
// all of the nodes we need.
if (validationNode.ChildNodes.Count != 0 ||
!validationNode.ValidateAllProperties ||
validationNode.Model == null)
{
return(validationNode.ChildNodes);
}
var childNodes = new List <ModelValidationNode>(validationNode.ChildNodes);
var elementMetadata = modelExplorer.Metadata.ElementMetadata;
if (elementMetadata == null)
{
foreach (var property in validationNode.ModelMetadata.Properties)
{
var propertyExplorer = modelExplorer.GetExplorerForProperty(property.PropertyName);
var propertyBindingName = property.BinderModelName ?? property.PropertyName;
var childKey = ModelNames.CreatePropertyModelName(validationNode.Key, propertyBindingName);
var childNode = new ModelValidationNode(childKey, property, propertyExplorer.Model)
{
ValidateAllProperties = true
};
childNodes.Add(childNode);
}
}
else
{
var enumerableModel = (IEnumerable)modelExplorer.Model;
// An integer index is incorrect in scenarios where there is a custom index provided by the user.
// However those scenarios are supported by createing a ModelValidationNode with the right keys.
var index = 0;
foreach (var element in enumerableModel)
{
var elementExplorer = new ModelExplorer(_modelMetadataProvider, elementMetadata, element);
var elementKey = ModelNames.CreateIndexModelName(validationNode.Key, index);
var childNode = new ModelValidationNode(elementKey, elementMetadata, elementExplorer.Model)
{
ValidateAllProperties = true
};
childNodes.Add(childNode);
index++;
}
}
return(childNodes);
}
public static ModelExplorer GetExplorerForProperty(this ModelExplorer @this, string[] properties)
{
foreach (var property in properties)
{
var propertyExplorer = @this.GetExplorerForProperty(property);
if (propertyExplorer != null)
{
return(propertyExplorer);
}
}
return(null);
}
private void ExpandValidationNode(ValidationContext context, ModelExplorer modelExplorer)
{
var validationNode = context.ValidationNode;
if (validationNode.ChildNodes.Count != 0 ||
!validationNode.ValidateAllProperties ||
validationNode.Model == null)
{
return;
}
var elementMetadata = modelExplorer.Metadata.ElementMetadata;
if (elementMetadata == null)
{
foreach (var property in validationNode.ModelMetadata.Properties)
{
var propertyExplorer = modelExplorer.GetExplorerForProperty(property.PropertyName);
var propertyBindingName = property.BinderModelName ?? property.PropertyName;
var childKey = ModelNames.CreatePropertyModelName(validationNode.Key, propertyBindingName);
var childNode = new ModelValidationNode(childKey, property, propertyExplorer.Model)
{
ValidateAllProperties = true
};
validationNode.ChildNodes.Add(childNode);
}
}
else
{
var enumerableModel = (IEnumerable)modelExplorer.Model;
// An integer index is incorrect in scenarios where there is a custom index provided by the user.
// However those scenarios are supported by createing a ModelValidationNode with the right keys.
var index = 0;
foreach (var element in enumerableModel)
{
var elementExplorer = new ModelExplorer(_modelMetadataProvider, elementMetadata, element);
var elementKey = ModelNames.CreateIndexModelName(validationNode.Key, index);
var childNode = new ModelValidationNode(elementKey, elementMetadata, elementExplorer.Model)
{
ValidateAllProperties = true
};
validationNode.ChildNodes.Add(childNode);
index++;
}
}
}
private bool ValidateChildNodes(
string currentModelKey,
ModelExplorer modelExplorer,
ValidationContext validationContext)
{
var isValid = true;
ExpandValidationNode(validationContext, modelExplorer);
IList <IModelValidator> validators = null;
if (modelExplorer.Metadata.IsCollectionType && modelExplorer.Model != null)
{
var enumerableModel = (IEnumerable)modelExplorer.Model;
var elementType = GetElementType(enumerableModel.GetType());
var elementMetadata = _modelMetadataProvider.GetMetadataForType(elementType);
validators = GetValidators(validationContext.ModelValidationContext.ValidatorProvider, elementMetadata);
}
foreach (var childNode in validationContext.ValidationNode.ChildNodes)
{
var childModelExplorer = childNode.ModelMetadata.MetadataKind == Metadata.ModelMetadataKind.Type ?
_modelMetadataProvider.GetModelExplorerForType(childNode.ModelMetadata.ModelType, childNode.Model) :
modelExplorer.GetExplorerForProperty(childNode.ModelMetadata.PropertyName);
var propertyValidationContext = new ValidationContext()
{
ModelValidationContext = ModelValidationContext.GetChildValidationContext(
validationContext.ModelValidationContext,
childModelExplorer),
Visited = validationContext.Visited,
ValidationNode = childNode
};
if (!ValidateNonVisitedNodeAndChildren(
childNode.Key,
propertyValidationContext,
validators))
{
isValid = false;
}
}
return(isValid);
}
private bool ValidateProperties(
string currentModelKey,
ModelExplorer modelExplorer,
ValidationContext validationContext)
{
var isValid = true;
foreach (var property in modelExplorer.Metadata.Properties)
{
var propertyExplorer = modelExplorer.GetExplorerForProperty(property.PropertyName);
var propertyMetadata = propertyExplorer.Metadata;
var propertyValidationContext = new ValidationContext()
{
ModelValidationContext = ModelValidationContext.GetChildValidationContext(
validationContext.ModelValidationContext,
propertyExplorer),
Visited = validationContext.Visited
};
var propertyBindingName = propertyMetadata.BinderModelName ?? propertyMetadata.PropertyName;
var childKey = ModelBindingHelper.CreatePropertyModelName(currentModelKey, propertyBindingName);
if (!ValidateNonVisitedNodeAndChildren(
childKey,
propertyValidationContext,
validators: null))
{
isValid = false;
}
}
return isValid;
}
/// <summary>
/// Gets a simple display string for the <see cref="ModelExplorer.Model"/> property
/// of <paramref name="modelExplorer"/>.
/// </summary>
/// <param name="modelExplorer">The <see cref="ModelExplorer"/>.</param>
/// <returns>A simple display string for the model.</returns>
public static string GetSimpleDisplayText(this ModelExplorer modelExplorer)
{
if (modelExplorer == null)
{
throw new ArgumentNullException(nameof(modelExplorer));
}
if (modelExplorer.Metadata.SimpleDisplayProperty != null)
{
var propertyExplorer = modelExplorer.GetExplorerForProperty(
modelExplorer.Metadata.SimpleDisplayProperty);
if (propertyExplorer?.Model != null)
{
return(propertyExplorer.Model.ToString());
}
}
if (modelExplorer.Model == null)
{
return(modelExplorer.Metadata.NullDisplayText);
}
if (modelExplorer.Metadata.IsEnum && modelExplorer.Model is Enum modelEnum)
{
var enumStringValue = modelEnum.ToString("d");
var enumGroupedDisplayNamesAndValues = modelExplorer.Metadata.EnumGroupedDisplayNamesAndValues;
Debug.Assert(enumGroupedDisplayNamesAndValues != null);
foreach (var kvp in enumGroupedDisplayNamesAndValues)
{
if (string.Equals(kvp.Value, enumStringValue, StringComparison.Ordinal))
{
return(kvp.Key.Name);
}
}
}
var stringResult = Convert.ToString(modelExplorer.Model, CultureInfo.CurrentCulture);
if (stringResult == null)
{
return(string.Empty);
}
if (!stringResult.Equals(modelExplorer.Model.GetType().FullName, StringComparison.Ordinal))
{
return(stringResult);
}
if (modelExplorer.PropertiesInternal.Length == 0)
{
return(string.Empty);
}
var firstProperty = modelExplorer.PropertiesInternal[0];
if (firstProperty.Model == null)
{
return(firstProperty.Metadata.NullDisplayText);
}
return(Convert.ToString(firstProperty.Model, CultureInfo.CurrentCulture));
}