Xml cannot be displayed. The data at the root level is invalid. There are 1st rows, location 1, and xml 1st rows.

Xml cannot be displayed. The data at the root level is invalid. There are 1st rows, location 1, and xml 1st rows.

This is usually because xml is faulty. There are many ways to modify it on the Internet. Here, xml is returned through webservice, this prompt is certainly because the service is faulty. One reason is that the xml returned after the web Service is changed is encoded. in C #, UrlDecode can be used for anti-encoding to solve this problem, you need to add system. web reference, and then temp = HttpUtility. urlDecode (temp, Encoding. UTF8); temp is the returned xml. Here it is in string format, and UTF8 is the encoding. Solution!