c# - 异常 : The input document has exceeded a limit set by MaxCharactersFromEntities

Question

我有一个如下所示的 XML 文件:

<!DOCTYPE Root [
<!ELEMENT anEntity (#PCDATA)>
<!ELEMENT 500SuchElementsHere (#PCData)>
<!ENTITY file1 SYSTEM "file1.xml">
...
<!ENTITY file25 SYSTEM "file25.xml">
]>
<Root>
    &file1;
    &file2;
    ...
    &file25;
</Root>

我像这样使用 XmlDocument 加载 XML 文件

XmlDocument doc = new XmlDocument();
doc.Load("filePath to the above xml file");

负载抛出标题中提到的异常。我在 Windows 7 Ultimate 上运行 .NET 4.5、VS 2012 Desktop Express。任何帮助表示赞赏。谢谢

Answer 1

您需要使用 XmlReader使用设置属性 MaxCharactersFromEntities设置为 0(或适用于您的场景的大数字):

        var doc = new XmlDocument();

        using (var stream = new MemoryStream(Encoding.Default.GetBytes(xml)))
        {
            var settings = new XmlReaderSettings();

            // The default is 0, but setting it here allows us to document exactly why we are taking this approach.
            settings.MaxCharactersFromEntities = 0;

            using (var reader = XmlReader.Create(stream, settings))
            {
                doc.Load(reader);
            }
        }