blob: 119b18e6d9f49d6928cf9c952106b7786f4a9acc (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
using System;
using System.ComponentModel;
using System.Reflection;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.ModelBinding;
namespace StardewModdingAPI.Web.Framework
{
/// <summary>Maps comma-delimited values to an <see cref="System.Collections.Generic.IEnumerable{T}"/> parameter.</summary>
/// <remarks>Derived from <a href="https://stackoverflow.com/a/43655986/262123" />.</remarks>
public class CommaDelimitedModelBinder : IModelBinder
{
/*********
** Public methods
*********/
/// <summary>Attempts to bind a model.</summary>
/// <param name="bindingContext">The model binding context.</param>
public Task BindModelAsync(ModelBindingContext bindingContext)
{
// validate
if (bindingContext == null)
throw new ArgumentNullException(nameof(bindingContext));
// extract values
string modelName = bindingContext.ModelName;
ValueProviderResult valueProviderResult = bindingContext.ValueProvider.GetValue(modelName);
string[] values = valueProviderResult
.ToString()
.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
Type elementType = bindingContext.ModelType.GetTypeInfo().GenericTypeArguments[0];
if (values.Length == 0)
{
bindingContext.Result = ModelBindingResult.Success(Array.CreateInstance(elementType, 0));
return Task.CompletedTask;
}
// map values
TypeConverter converter = TypeDescriptor.GetConverter(elementType);
Array typedArray = Array.CreateInstance(elementType, values.Length);
try
{
for (int i = 0; i < values.Length; ++i)
{
string value = values[i];
object convertedValue = converter.ConvertFromString(value);
typedArray.SetValue(convertedValue, i);
}
}
catch (Exception exception)
{
bindingContext.ModelState.TryAddModelError(modelName, exception, bindingContext.ModelMetadata);
}
bindingContext.Result = ModelBindingResult.Success(typedArray);
return Task.CompletedTask;
}
}
}
|
