protected ModelExplorer GetModelExplorer <TResult>(Expression <Func <TModel, TResult> > expression)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
var modelExplorer = ExpressionMetadataProvider.FromLambdaExpression(expression, ViewData, MetadataProvider);
if (modelExplorer == null)
{
var expressionName = GetExpressionName(expression);
throw new InvalidOperationException(Resources.FormatHtmlHelper_NullModelMetadata(expressionName));
}
return(modelExplorer);
}
/// <inheritdoc />
public string DisplayNameForInnerType <TModelItem, TResult>(
Expression <Func <TModelItem, TResult> > expression)
{
if (expression == null)
{
throw new ArgumentNullException(nameof(expression));
}
var modelExplorer = ExpressionMetadataProvider.FromLambdaExpression <TModelItem, TResult>(
expression,
new ViewDataDictionary <TModelItem>(ViewData, model: null),
MetadataProvider);
var expressionText = ExpressionHelper.GetExpressionText(expression);
if (modelExplorer == null)
{
throw new InvalidOperationException(Resources.FormatHtmlHelper_NullModelMetadata(expressionText));
}
return(GenerateDisplayName(modelExplorer, expressionText));
}
