Question

我有一个xml文件，我使用DataSet.ReadXML在DataTable中加载它。此XML具有内部DTD定义。我认为DataTable.ReadXML在将XML加载到内存之前验证XML。是这样的吗？

我是否需要在我的数据集中设置一些属性以使其针对定义的DTD验证Xml，或者我是否需要使用其他XML类验证它

<?xml version="1.0" standalone="yes"?>

<!DOCTYPE Resources [
<!ELEMENT Resources (Resource)+>
<!ELEMENT Resource (ResourceName,ResourceEmail)>
<!ELEMENT ResourceName (#PCDATA)>
<!ELEMENT ResourceEmail (#PCDATA)>

]>

<Resources>
<Resource>
<ResourceName>test</ResourceName>
<ResourceEmail>dfjfhg@fkjg.com</ResourceEmail>
</Resource>
</Resources>

Answer 1

您需要将XmlReadMode枚举与ReadXML方法一起使用：

DataSet.ReadXml(Stream|String|TextReader|XmlReader, XmlReadMode.ReadSchema)

e.g。

string xml = // your xml here; can also use Stream, TextReader or XmlReader

DataSet.ReadXml(xml, XmlReadMode.ReadSchema);

DataSet.ReadXml Method

XmlReadMode Enumeration

已添加

如果您希望验证 XML，则需要使用XmlReader并创建“验证”阅读器。看一下这篇文章：

DataSet does not validate XML Schema (XSD)

Answer 2

        var errors = new StringBuilder();
        var isValid = true;
        var settings = new XmlReaderSettings();
        settings.ValidationEventHandler += (o, e) => { errors.AppendLine(e.Message); isValid = false; };
        settings.ValidationType = ValidationType.DTD;
        settings.DtdProcessing = DtdProcessing.Parse;


        var content = @"<?xml version=""1.0"" standalone=""yes""?>
                            <!DOCTYPE Resources [
                            <!ELEMENT Resources (Resource)+>
                            <!ELEMENT Resource (ResourceName,ResourceEmail)>
                            <!ELEMENT ResourceName (#PCDATA)>
                            <!ELEMENT ResourceEmail (#PCDATA)>                              
                            ]>                          
                        <Resources>
                            <Resource>
                                <ResourceName>test</ResourceName>
                                <ResourceEmail>dfjfhg@fkjg.com</ResourceEmail>

                                <YourPlaceIsNotHere>asdasd</YourPlaceIsNotHere>


                            </Resource>
                        </Resources>";
        using (var validator = XmlReader.Create(new StringReader(content), settings))
        {
            while (validator.Read())
            {
                if (!isValid)
                {
                    validator.Close();
                    break;
                }
            }
        }

解决方案是使用此代码在加载到DataSet之前验证xml。

Answer 3

您可以使用此代码根据DTD验证XML

XmlReaderSettings settings = new XmlReaderSettings();
               settings.DtdProcessing = DtdProcessing.Parse;
               settings.ValidationType = ValidationType.DTD;

               string data = null;
               XmlReader validatingReader = XmlReader.Create(File.Open("C:\\check\\TEMP_DTD.XML", FileMode.Open), settings, data);

                DataSet ds = new DataSet();
                ds.ReadXml(validatingReader);

DataSet.ReadXML（）根据DTD验证XML

3 个答案: