iotgateway/WalkingTec.Mvvm/WalkingTec.Mvvm.Mvc/Binders/DateRangeBinder.cs

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2021-12-14 14:10:44 +08:00
using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using WalkingTec.Mvvm.Core;
namespace WalkingTec.Mvvm.Mvc.Binders
{
/// <summary>
/// DateRangeBinder
/// DataRange model binding
/// </summary>
public class DateRangeBinder : IModelBinder
{
/// <summary>
/// BindModelAsync
/// </summary>
/// <param name="bindingContext"></param>
/// <returns></returns>
public Task BindModelAsync(ModelBindingContext bindingContext)
{
if (bindingContext == null)
{
throw new ArgumentNullException(nameof(bindingContext));
}
var modelName = bindingContext.ModelName;
if (string.IsNullOrEmpty(modelName))
{
bindingContext.Result = ModelBindingResult.Success(null);
return Task.CompletedTask;
}
var valueProviderResult = bindingContext.ValueProvider.GetValue(modelName);
if (valueProviderResult == ValueProviderResult.None)
{
modelName += "[Value]";
valueProviderResult = bindingContext.ValueProvider.GetValue(modelName);
}
if (valueProviderResult == ValueProviderResult.None)
return Task.CompletedTask;
bindingContext.ModelState.SetModelValue(modelName, valueProviderResult);
var value = valueProviderResult.FirstValue;
if (string.IsNullOrEmpty(value))
{
return Task.CompletedTask;
}
if(DateRange.TryParse(value,out var dateRange))
bindingContext.Result = ModelBindingResult.Success(dateRange);
return Task.CompletedTask;
}
}
}