Request.Form抛出异常

Question

我正在制作的ASP.NET核心网络应用程序，我是通过HttpContext上传javascript文件的文件。所以，当我试图在服务器端使用Request.Form.File加载文件时，Form抛出了System.IO.InvalidDataException类型的异常。表单消息显示：“超过多部分正文长度限制16384”。我试图编辑web.config文件以增加该限制，但消息总是相同的。我是不是遗漏了什么或者我看错了方向？

谢谢。

Answer 1

定义此属性：

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false, Inherited = true)]
public class RequestFormSizeLimitAttribute : Attribute, IAuthorizationFilter, IOrderedFilter
{
    private readonly FormOptions _formOptions;

    public RequestFormSizeLimitAttribute(int valueCountLimit)
    {
        _formOptions = new FormOptions()
        {
            ValueCountLimit = valueCountLimit
        };
    }

    public int Order { get; set; }

    public void OnAuthorization(AuthorizationFilterContext context)
    {
        var features = context.HttpContext.Features;
        var formFeature = features.Get<IFormFeature>();

        if (formFeature == null || formFeature.Form == null)
        {
            // Request form has not been read yet, so set the limits
            features.Set<IFormFeature>(new FormFeature(context.HttpContext.Request, _formOptions));
        }
    }
}

并将此属性添加到您的操作方法中，看看会发生什么：

[RequestFormSizeLimit(valueCountLimit: 2147483648)]
[HttpPost]
public IActionResult ActionMethod(...)
{
  ...
}