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

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2021-12-14 14:10:44 +08:00
using Microsoft.AspNetCore.Mvc.Controllers;
using Microsoft.AspNetCore.Mvc.ModelBinding;
using System;
using System.Linq;
using System.Threading.Tasks;
using System.Web;
namespace WalkingTec.Mvvm.Mvc.Binders
{
/// <summary>
/// StringIgnoreLTGTBinder
/// 忽略客户端提交的 &lt;及&gt;字符
/// </summary>
public class StringIgnoreLTGTBinder : 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)
{
return Task.CompletedTask;
}
bindingContext.ModelState.SetModelValue(modelName, valueProviderResult);
var value = valueProviderResult.FirstValue;
var actDescriptor = bindingContext.ActionContext.ActionDescriptor as ControllerActionDescriptor;
var count = actDescriptor
.MethodInfo
.CustomAttributes
.Where(x => x.AttributeType == typeof(StringNeedLTGTAttribute)).Count();
if (count == 0)
{
value = HttpUtility.HtmlEncode(value);
}
bindingContext.Result = ModelBindingResult.Success(value);
return Task.CompletedTask;
}
}
}