使用 XSD 验证 XmlDocument
我正在开发一个系统，它将通过 Web 服务接收 XML (XmlDocument)。我不会在硬盘上保存此 XML (XmlDocument)。它将在内存上进行管理。
我有一个文件 XSD 来验证从 WebService 收到的 XML (XmlDocument)。我正在尝试做一个示例来说明如何验证此 Xml。
我的 XML：
<?xml version="1.0"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
我也有我的 XSD：
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.w3schools.com"
xmlns="http://www.w3schools.com"
elementFormDefault="qualified">
<xs:element name="note">
<xs:complexType>
<xs:sequence>
<xs:element name="to" type="xs:string"/>
<xs:element name="from" type="xs:string"/>
<xs:element name="heading" type="xs:string"/>
<xs:element name="body" type="xs:int"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
正如我们所看到的，我将 body 字段设置为 int，只是为了模拟错误。
好吧，为了尝试得到错误，我有以下代码：
//event handler to manage the errors
private static void verifyErrors(object sender, ValidationEventArgs args)
{
if (args.Severity == XmlSeverityType.Warning)
MessageBox.Show(args.Message);
}
在单击按钮上，我有：
private void button1_Click(object sender, EventArgs e)
{
try
{
// my XmlDocument (in this case I will load from hardisk)
XmlDocument xml = new XmlDocument();
// load the XSD schema.. is this right?
xml.Schemas.Add("http://www.w3schools.com", "meuEsquema.xsd");
// Load my XML from hardisk
xml.Load("meusDados.xml");
// event handler to manage the errors from XmlDocument object
ValidationEventHandler veh = new ValidationEventHandler(verificaErros);
// try to validate my XML.. and the event handler verifyError will show the error
xml.Validate(veh);
}
catch {
// do nothing.. just to test
}
}
问题是我将 body 字段更改为 int，但有该字段中的字符串值，我没有收到错误。
I am developing a system that will receive a XML (XmlDocument) via webservice. I won't have this XML (XmlDocument) on hardisk. It will be managed on memory.
I have a file XSD to validate the XML (XmlDocument) that I receive from my WebService. I am trying to do a example to how validate this Xml.
My XML:
<?xml version="1.0"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>
also I have my XSD:
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.w3schools.com"
xmlns="http://www.w3schools.com"
elementFormDefault="qualified">
<xs:element name="note">
<xs:complexType>
<xs:sequence>
<xs:element name="to" type="xs:string"/>
<xs:element name="from" type="xs:string"/>
<xs:element name="heading" type="xs:string"/>
<xs:element name="body" type="xs:int"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
As we can see, the body field I've put as int, just to simulate the error.
Well, to try get the error, I have the following code:
//event handler to manage the errors
private static void verifyErrors(object sender, ValidationEventArgs args)
{
if (args.Severity == XmlSeverityType.Warning)
MessageBox.Show(args.Message);
}
On click button, I have:
private void button1_Click(object sender, EventArgs e)
{
try
{
// my XmlDocument (in this case I will load from hardisk)
XmlDocument xml = new XmlDocument();
// load the XSD schema.. is this right?
xml.Schemas.Add("http://www.w3schools.com", "meuEsquema.xsd");
// Load my XML from hardisk
xml.Load("meusDados.xml");
// event handler to manage the errors from XmlDocument object
ValidationEventHandler veh = new ValidationEventHandler(verificaErros);
// try to validate my XML.. and the event handler verifyError will show the error
xml.Validate(veh);
}
catch {
// do nothing.. just to test
}
}
The problem is that I changed the body field to int, but there are a string value in that field and I am not getting error.
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
问题在于 XML 命名空间。
在 XSD 中，您将
targetNamespace=和xmlns=定义为"http://www.w3schools.com"：但是 -您的 XML 文档不包含任何 XML 命名空间。
所以基本上，XSD 根本不验证此 XML。
您需要从 XSD 中删除这些命名空间：
或者将 XSD 中定义的默认 XML 命名空间（无前缀）添加到 XML：
如果您的 XSD 中有 XML 命名空间，则这些命名空间必须在 XML 中显示为好吧 - 反之亦然。
一旦您执行了一种或另一种解决方案，您应该会收到类似以下内容的验证错误：
The problem is XML namespaces.
In your XSD, you define the
targetNamespace=andxmlns=to both be"http://www.w3schools.com":However - your XML document does not contain any XML namespaces.
So basically, that XSD isn't validating this XML at all.
You need to either remove those namespaces from your XSD:
or alternatively, add the default XML namespace (with no prefix) defined in your XSD to your XML:
If you have XML namespaces in your XSD, those have to be present in the XML as well - and vice versa.
Once you do one or the other solution, you should get a validation error something like:
我希望我能在这里帮助你。 我有类似的问题（带有 Xml 误报）。
我在我的特定情况下发现了两个错误，其中一个可能实际上是相关的。您必须通过
XmlReaderSettings选择加入各种 Xml 验证。这是一个简单的用法（摘自上面的帖子）I am hoping I can help you here. I had a similar issue (with Xml false-positives).
I found two errors in my particular situation, one which may actually be relevant. You must opt-in to various Xml validation via
XmlReaderSettings. Here is a simple usage (taken from post above)