Rest API return response incorrect XML format using C#

Question

I'm trying to get a XML from a asmx using a post.

    HttpClient client = new HttpClient();
    var request = new HttpRequestMessage(HttpMethod.Post,"https://.../esiat.asmx/RecepcionarNFSe");
    request.Content = content;
    var response = client.Send(request);
    var str = await response.Content.ReadAsStringAsync();

And I'm not getting the corret XML, its coming with this response.

What I'm dong wrong?

Corrent data is :

    
<tcRetornoNFSe><tcValidaGrcNFSe><tsFlgEtt>V</tsFlgEtt><tsDesOco>Estrutura do Arquivo XML OK!</tsDesOco></tcValidaGrcNFSe><tcInfRetNFSe><tsNumNot>37436</tsNumNot><tsCodVer>VMR4NBUTTW</tsCodVer><tsFlgRet>V</tsFlgRet><tsDesOco>NFSe Importado com sucesso.</tsDesOco><tsLnk>https://nfe.araxa.mg.gov.br/Valida_NFELogo_Emissao.aspx?InscricaoMunicipal=3070326219&amp;Distrito=1&amp;NumeroNota=37436&amp;CodVrfNfe=VMR4NBUTTW</tsLnk></tcInfRetNFSe></tcRetornoNFSe>

var str = await response.Content.ReadAsStringAsync(); is a string. You now have to load it into an XML document. The response is correct. — Metro Smurf
– Metro Smurf, Commented Jun 27, 2023 at 18:25

Renan Fernandes · Accepted Answer · 2023-06-27 21:09:33Z

0

Looks like your response is HTML encoded and is located inside the tag. You can extract the content of that tag then use the HttpUtility.HtmlDecode (https://learn.microsoft.com/en-us/dotnet/api/system.web.httputility.htmldecode?view=net-7.0)

var str = await response.Content.ReadAsStringAsync();
var startTag = "<string xmlns=\"http://tempuri.org/\">";
var endTag = "</string>";
int startIndex = str.IndexOf(startTag) + startTag.Length;
int endIndex = str.IndexOf(endTag);
string innerText = str.Substring(startIndex, endIndex - startIndex);
string decodedXml = HttpUtility.HtmlDecode(innerText);

This will make your string a "xml string", I tried to scape the string if it don't work please make the adjustments necessary to find the index.

edited Jun 27, 2023 at 21:09

answered Jun 27, 2023 at 18:30

Renan Fernandes

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2 Comments

cristianormoraes Over a year ago

When trying the HtmlDecoce, I got the XML but this XML is not the valid XML because the node <string xmlns="tempuri.org">

Renan Fernandes Over a year ago

The XML content you want is inside the tag <string>, that tag is a placeholder from a C# ASMX service. Just extract the text inside that tag and Decode it, Ill update my answer. Btw next time provide Textual codes on your question xD.

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