XmlDocument.LoadXml()抛出ComException类型的异常

Question

我正在尝试解析从此链接返回的xml文档,但我得到类型的异常,ComException并带有以下消息:

Error HRESULT E_FAIL has been returned from a call to a COM component.

这是代码:

        try
        {
            //...
            string EPGXML = await DownloadAsync(url);

            var xmldoc = new XmlDocument();
            xmldoc.LoadXml(EPGXML); //this line throws the exception
            //...rest of the code
        }
        catch (Exception)
        {
            //I get here...
        }

能帮到我,为什么我收到这条消息,我该如何解决这个问题？谢谢.

编辑:

我正在使用这个函数读取XML的源代码(也许我在这里错了,我应该做一些事情来获取UTF-8中的字符串,因为我没有在调试模式下看到字符串中的德语字符(watch窗口):

    private async static Task<string> DownloadPageAsync(string url)
    {
        try
        {
            HttpClientHandler handler = new HttpClientHandler();
            handler.UseDefaultCredentials = true;
            handler.AllowAutoRedirect = true;
            handler.UseCookies = true;
            HttpClient client = new HttpClient(handler);
            client.MaxResponseContentBufferSize = 10000000;
            HttpResponseMessage response = await client.GetAsync(url);
            response.EnsureSuccessStatusCode();

            string responseBody = response.Content.ReadAsString();
            return responseBody;
        }
        catch (Exception ex)
        {
            return "error" + ex.Message;
        }
    }

Answer 1

您提供的XML无效,至少Firefox的说法如下:

Erreur d'analyze XML:malforméImplacement:http://www.onlinetvrecorder.com/？dog = epg_export&format = xml&btn_ok = OK&> stations = 3SAT,ANIXE,ARD&from = 30.11.2011&to =30.11.2011Numérodeligne 218,Colonne 193:

(对不起法国人)

看得更近一点,看起来解析器打破了字符"ö"上的"Plötzlich"这个词.

您应该使用CDATA来防止这种情况:

<![CDATA[Your text here can contain special chars]]>