Error 404 sending a JSON with WebClient.UploadValues

Question

I'm trying to make a call with WebClient.UploadValues, but I'm having a little problem.

It works fine this way:

NameValueCollection parametros = new NameValueCollection();
parametros.Add("idUsuarioSolicitante", "24");
parametros.Add("localColeta", "3");
parametros.Add("requisicaoDTOListaJSON", "1");

var retorno = conexao.UploadValues("SincronizacaoAPI/SincronizarRequisicao", parametros);

But when I put my JSON param I got a 404 error:

NameValueCollection parametros = new NameValueCollection();
parametros.Add("idUsuarioSolicitante", "24");
parametros.Add("localColeta", "3");
parametros.Add("requisicaoDTOListaJSON", JsonConvert.SerializeObject(
     TransformadorDTOEntidade.GetRequisicaoSinc(requisicaoPendenteLista)));

var retorno = conexao.UploadValues("SincronizacaoAPI/SincronizarRequisicao", parametros);

Details:

Signature of the method I'm trying to call:

public string SincronizarRequisicao(int idUsuarioSolicitante, int localColeta,
        string requisicaoDTOListaJSON)
{
    ...
}

(I'm calling a controller from another controller, two diferent projects. .NET Framework 4.5.)

Hola amigo, Can you share the URL that you have request to? Edit: I mean API route url — Fatih TAN, Sep 28 '18 at 18:34
http://localhost:PORT/SincronizacaoAPI/SincronizarRequisicao?... — Marco Talles Silva, Sep 28 '18 at 18:45
I have build some dummy example but it passes to the api function. Can you check the variable: "requisicaoPendenteLista" is null or not? — Fatih TAN, Sep 28 '18 at 18:53
Can you try with less items like 3-5. You may exceed the request length. — Fatih TAN, Sep 28 '18 at 19:00
Nice! With something like 40 it works... But the "idUsuarioSolicitante" is null in the destiny. What now? — Marco Talles Silva, Sep 28 '18 at 19:08
Hmm interesting. By the way, idUsuarioSolicitante cannot be null. Because it's integer. You mean zero I guess. I suggest you to obtain these three variables in one object. — Fatih TAN, Sep 28 '18 at 19:12
My bad. "idUsuarioSolicitante" is ok, the null one is "requisicaoDTOListaJSON". The JSON guy. — Marco Talles Silva, Sep 28 '18 at 19:19

score 0 · Accepted Answer · answered Sep 28 '18 at 19:45

0

Try with less items like 3-5. You may exceed the request length. In order to increase the request length check this SO answer:

Click here

answered Sep 28 '18 at 19:45

Fatih TAN

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Error 404 sending a JSON with WebClient.UploadValues

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