asp.net-core – Stream的意外结束,内容可能已被另一个组件读取.

发布时间：2020-12-16 07:07:09 所属栏目：asp.Net 来源：网络整理

导读：当我尝试从请求中读取多部分内容时,我得到一个异常,说明内容可能已被其他组件读取. if (MultipartRequestHelper.IsMultipartContentType(Request.ContentType)) { // Used to accumulate all the form url encoded key value pairs in the // request. var f

当我尝试从请求中读取多部分内容时,我得到一个异常,说明内容可能已被其他组件读取.

if (MultipartRequestHelper.IsMultipartContentType(Request.ContentType))
            {
                // Used to accumulate all the form url encoded key value pairs in the 
                // request.
                var formAccumulator = new KeyValueAccumulator();

                var boundary = Request.GetMultipartBoundary();
                var reader = new MultipartReader(boundary,HttpContext.Request.Body);
                var section = await reader.ReadNextSectionAsync();
                while (section != null)
                {
                    ContentDispositionHeaderValue contentDisposition;
                    var hasContentDispositionHeader =
                        ContentDispositionHeaderValue.TryParse(section.ContentDisposition,out contentDisposition);
                }
            }

解决方法

事实证明,我必须使用下面的属性禁用表单值模型绑定.

[HttpPost]
    [Route("")]
    [DisableFormValueModelBinding]
    public async Task<IActionResult> Post()

属性实现如下

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)]
public class DisableFormValueModelBindingAttribute : Attribute,IResourceFilter
{
    public void OnResourceExecuting(ResourceExecutingContext context)
    {
        var factories = context.ValueProviderFactories;
        factories.RemoveType<FormValueProviderFactory>();
        factories.RemoveType<JQueryFormValueProviderFactory>();
    }

    public void OnResourceExecuted(ResourceExecutedContext context)
    {
    }
}

（编辑：李大同）

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