Xmlexcpetion：根级别的数据无效。第1行位置1 [英] Xmlexcpetion: data at the root level is invalid. Line 1 position 1

问题描述

我正在尝试从服务获取响应，这是一个xml响应。我收到一个xml异常根级别的数据无效



我尝试了什么：



这是我获取http响应的代码：

public XmlDocument ReceiveXMLResponse（）

{

string retVal = string.Empty;

XmlDocument xmlDoc = new XmlDocument（）;



var httpResponse =（HttpWebResponse）_httpWebRequest.GetResponse（）;



if（httpResponse.StatusCode == HttpStatusCode.OK）

{

using（var streamReader = new StreamReader（httpResponse.GetResponseStream（），Encoding.GetEncoding（ISO-8859-1）））

{

retVal = streamReader.ReadtoEnd（）;

xmlDoc.LoadXml（retVal）;

else

{



retVal = httpResponse。统计usCode.ToString（）;

}



返回xmlDoc;

}



以下是我获取元素值的方法：



XmlNodeList firstName = CertificateInfo.GetElementsByTagName（FirstName）;

string FirstName = string.Empty;

foreach（firstName中的XmlNode节点）

{

FirstName = node.InnerText;

}

I am trying to get the response from a service, which is an xml response. I am receiving an xml exception "Data at the root level is invalid"

What I have tried:

Here is my code to get the http response:
public XmlDocument ReceiveXMLResponse()
{
string retVal = string.Empty;
XmlDocument xmlDoc = new XmlDocument();

var httpResponse = (HttpWebResponse)_httpWebRequest.GetResponse();

if (httpResponse.StatusCode == HttpStatusCode.OK)
{
using (var streamReader = new StreamReader(httpResponse.GetResponseStream(), Encoding.GetEncoding("ISO-8859-1")))
{
retVal = streamReader.ReadtoEnd();
xmlDoc.LoadXml(retVal);
else
{

retVal = httpResponse.StatusCode.ToString();
}

return xmlDoc;
}

Here is how I am getting the element values:

XmlNodeList firstName = CertificateInfo.GetElementsByTagName("FirstName");
string FirstName = string.Empty;
foreach (XmlNode node in firstName)
{
FirstName = node.InnerText;
}

推荐答案

很可能你没有获得XML响应，但可能是JSON repsonse。你必须在 retVal 变量中查看你得到的内容才能找到答案。



这是学习的地方使用调试器非常方便。

Chances are good that you didn't get an XML response, but possibly a JSON repsonse. You have to look at what you got back in your retVal variable to find out.

This is where learning to use the debugger comes in really handy.

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