正如我的标题中所提到的，在访问Request.Form.Files时，应用程序抛出异常
System.Io.InvalidDataException: "Multipart body length limit 16384 exceeded" in an Asp.Net Core 2.0.0 Web Application.我正在处理的应用程序是Asp.Net核心MVC Web应用程序。我使用Summernote作为我的WYSIWYG文本编辑器。在那里我启用了功能上传图像（s。我的Javascript）。这很好，直到我需要实现另一个上传器来上传像.pdf，txt，doc这样的文本文件。
使用summernote texteditor时出现错误，使用“标准”上传按钮或自定义pdf上传按钮（s.C＃代码）。 Image功能正常，直到我（尝试）实现新的pdf文件上传器。起初我的错误看起来非常基本，因为很明显，我试图上传的文件大于16kb（Asp.Net Cores Uploadlimit），所以我尝试了“常用”方法（s。下面）修复此错误，可以在Stack Overflow和类似网站上找到：
services.Configure<FormOptions>(x =>
{
x.ValueLengthLimit = int.MaxValue;
x.MultipartBodyLengthLimit = long.MaxValue;
x.MemoryBufferThreshold = 20;
});
或
public class RequestFormSizeLimitAttribute : Attribute, IAuthorizationFilter, IOrderedFilter
{
public int Order { get; }
private readonly FormOptions _formOptions;
public RequestFormSizeLimitAttribute(int valueCountLimit)
{
_formOptions = new FormOptions()
{
ValueCountLimit = valueCountLimit,
KeyLengthLimit = valueCountLimit
};
}
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(new FormFeature(context.HttpContext.Request, _formOptions));
}
}
}
或
<system.web>
<httpRuntime maxRequestLength="1048576" />
</system.web>
<system.webServer>
<security>
<requestFiltering>
<requestLimits maxAllowedContentLength="1073741824" />
</requestFiltering>
</security>
</system.webServer>
然而，这些方法都没有修复我的错误。 首先是我的Jquery代码：
//For Image Uploading
function sendFiles(file) {
var data = new FormData();
data.append("file", file);
data.append('divisionId', $('#divisionId').val());
$.ajax({
data: data,
type: "POST",
url: "/api/File/UploadImageAjax",
cache: false,
contentType: false,
processData: false,
success: function (image) {
if (image !== "Error") {
var picture = $(image);
$('#summernote').summernote("insertNode", picture[0]);
} else {
bootbox.alert("Fehler beim hochladen des Bildes.");
}
}
});
}
//For PDF-File Upload
$('#btnUpload').on('click', function (e) {
var validation = validator.form();
e.preventDefault();
if (validation) {
var data = new FormData();
var text = document.getElementById('pdfText').value;
var fileSelect = document.getElementById('pdfFile');
data.append('linkName', text);
data.append('divisionId', $('#divisionId').val());
var files = fileSelect.files;
data.append('file', files[0]);
closeModal();
$.ajax({
data: data,
type: "POST",
url: "/api/File/UploadTextFileAjax",
cache: false,
contentType: false,
processData: false,
success: function (file) {
var atag = document.createElement('a');
atag.setAttribute('href', file.absoulutePath);
atag.setAttribute('id', file.fileId);
atag.innerHtml = file.linkText;
$('#summernote').summernote('insertNode', atag);
},
error: function(respons) {
bootbox.alert("Fehler beim Speichern der Text Datei.");
}
});
}
});
最后来自Controller的C＃代码：
[HttpPost]
[RequestFormSizeLimit(valueCountLimit: 2147483647)]
public async Task<IActionResult> UploadImageAjax()
{
//Exception thrown here.
var files = Request.Form.Files;
var request = Request.Form.FirstOrDefault(d => d.Key == "divisionId");
var divisionName = await GetDivisionNameAsync(request);
if (divisionName != null)
{
var user = await _userManager.GetUserAsync(HttpContext.User);
if (files.Count == 1 && user != null)
{
for (int i = 0; i < 1; i++)
{
var file = files[i];
if (TestImageFileName(file))
{
var path = ContentDispositionHeaderValue.Parse(file.ContentDisposition).FileName.ToString().Trim('"');
var fileName = $@"\images\Sportarten\{divisionName}\{path}";
if (!await _imageHandler.IsImageInDbAsync(fileName))
{
path = _hosting.WebRootPath + fileName;
using (FileStream fs = System.IO.File.Create(path))
{
await file.CopyToAsync(fs);
await fs.FlushAsync();
}
var image = new ImageViewModel { FileName = file.FileName, AbsolutePath = fileName, AspNetUserId = user.Id, FullPath = path };
var imageId = await _imageHandler.AddImageAsync(image);
var imageNode = $@"<img id='{imageId}' src='{fileName}' class='img-responsive'/>";
return Json(imageNode);
}
var id = await _imageHandler.GetImageIdbyNameAsync(path);
var node = $@"<img id='{id}' src='{fileName}' class='img-responsive'/>";
return Json(node);
}
}
}
}
return BadRequest("Error");
}
[HttpPost]
public async Task<IActionResult> UploadTextFileAjax()
{
//Exception thrown here.
var files = Request.Form.Files;
var request = Request.Form.FirstOrDefault(d => d.Key == "divisionId");
var divisionName = await GetDivisionNameAsync(request);
var linkText = Request.Form.FirstOrDefault(l => l.Key == "linkName").Value.ToString();
if (linkText != null && divisionName != null)
{
var user = await _userManager.GetUserAsync(HttpContext.User);
if (files.Count == 1 && user != null)
{
for (int i = 0; i < 1; i++)
{
var file = files[i];
if (TestTextFileName(file))
{
var path = ContentDispositionHeaderValue.Parse(file.ContentDisposition).FileName.ToString().Trim('"');
var fileName = $@"\files\Sportarten\{divisionName}\{path}";
if (await _file.IsFileInDb(fileName))
{
path = _hosting.WebRootPath + fileName;
using (FileStream fs = System.IO.File.Create(path))
{
await file.CopyToAsync(fs);
await fs.FlushAsync();
}
var textFile = new FileViewModel
{
AbsolutePath = fileName,
AspNetUserId = user.Id,
FileName = file.FileName,
FullPath = path
};
var fileId = await _file.AddFile(textFile);
return Ok(new {absolutePath = path, fileId = fileId, linkText = linkText});
}
var oldText = await _file.FindFilebyName(path);
return Ok(new { absolutePath = oldText.AbsolutePath, fileId = oldText.FileId, linkText = linkText });
}
}
}
}
return BadRequest("Error");
}
最后这是我得到的Stacktrace，当错误被抛出时（抱歉质量不好）： Full Stacktrace of Error
