public static TResult ParseContentDelegate <TResult>(string key, IFormCollection formData,
Func <string, TResult> onStringNeedsBinding,
Func <IFormFile, TResult> onFileNeedsBinding,
Func <string, TResult> onFailure)
{
if (formData.IsDefaultOrNull())
{
return(onFailure("No form data provided"));
}
return(formData
.Where(kvp => kvp.Key == key)
.First(
(kvp, next) =>
{
var strValue = (string)kvp.Value;
return onStringNeedsBinding(strValue);
},
() =>
{
return formData.Files
.Where(file => file.Name == key)
.First(
(file, next) =>
{
var strValue = (IFormFile)file;
return onFileNeedsBinding(strValue);
},
() => onFailure("Key not found"));
}));
}