Submitting FormData to C#/.NET

Question

I am running an Angular JS application on top of a C#/.NET legacy framework.

I need to upload & save a file along with some POST data variables, and therefore using the FormData api.

let formData = new FormData();
formData.append('co-lo-import', file);
formData.append('data', someString);

Then I make an xhr request like so:

$http.post("//some/dot-net/endpoint/Default.aspx",
           formData,
           { headers: { "Content-Type" : "multipart/form-data" } 
});

On the .NET side, I'm trying to grab these values from the Request variable.

string someString = Request.Form['data'];

HttpFileCollection uploadedFiles = null;

if(Request.Files != null){
    uploadedFiles = Request.Files;
}

But these values are always empty. There is never anything in Request.Form

I tried Request.Form.Get("data") which comes up empty also.

I am seeing the file and data in the request payload:

How can I grab this data on the back-end using .NET?

When posting objects created by the [FormData API](https://developer.mozilla.org/en-US/docs/Web/API/FormData), it is important to set the Content-type header to `undefined`. — georgeawg, Feb 22 '19 at 06:24

score 0 · Answer 1 · answered Feb 22 '19 at 05:50

0

If the data is not available in Request.Form then try to access the bytes from raw input stream from HTTP request:

using(var reader = new StreamReader(Request.InputStream))
{
    content = reader.ReadToEnd();
}

answered Feb 22 '19 at 05:50

1 Answers1