我定义了一个xsd：非常类似于html表。行有列，列有元素。<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:attributeGroup name="basics"> <xs:attribute name="title" type="xs:string" use="required"/> <xs:attribute name="field_id" type="xs:string" use="required"/> <xs:attribute name="is_mandatory" type="xs:boolean" use="required"/> </xs:attributeGroup> <xs:element name="form"> <xs:complexType> <xs:sequence> <xs:element name="row"> <xs:complexType> <xs:sequence> <xs:element name="col"> <xs:complexType> <xs:sequence> <!-- lable --> <xs:element name="label" type="xs:string"/> <!-- image --> <xs:element name="image" > <xs:complexType> <xs:attribute name="src" type="xs:string" use="required"/> </xs:complexType> </xs:element> <!-- textbox --> <xs:element name="textbox"> <xs:complexType> <xs:attributeGroup ref="basics"/> <xs:attribute name="hint" type="xs:string" use="optional" default=""/> </xs:complexType> </xs:element> <!-- yesno --> <xs:element name="yesno"> <xs:complexType> <xs:attributeGroup ref="basics"/> </xs:complexType> </xs:element> <!-- calendar --> <xs:element name="calendar"> <xs:complexType> <xs:attributeGroup ref="basics"/> </xs:complexType> </xs:element> <!-- Select/ multi select --> <xs:element name="select"> <xs:complexType> <xs:sequence> <xs:element name="option"/> </xs:sequence> <xs:attributeGroup ref="basics"/> <xs:attribute name="singleChoice" type="xs:boolean" use="required"/> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> </xs:complexType> </xs:element> </xs:sequence> <xs:attribute name="title" type="xs:string" use="required"/> </xs:complexType> </xs:element></xs:schema>并创建了以下XML（对我来说是一个有效的XML）：<?xml version="1.0" encoding="utf-8" ?><form title="title"> <row> <col> <textbox title="aaa" field="Name" mandatory="false" hint="aaa"/> </col> </row> <row> <col> <textbox title="bbb" field="UID" mandatory="true" hint="bbb"/> <yesno title="dddddd" field="field-yesno" mandatory="true"/> </col> </row> <row> <col> <lable>dddddd</lable> </col> </row> <row> <col> <calendar title="cccc" field="StartDate" mandatory="true"/> </col> </row> <row> <col> <select title="select" field="ffff" mandatory="true"> <option value="1">option 1</option> <option value="2" selected="true">option 2</option> <option value="3">option 3</option> </select> </col> </row></form>当我试图验证：XmlReaderSettings settings = new XmlReaderSettings(); settings.Schemas.Add(null, getAbsolutePath("xml\\form_schema.xsd")); settings.ValidationType = ValidationType.Schema; settings.CloseInput = true; settings.ValidationFlags = XmlSchemaValidationFlags.ReportValidationWarnings | XmlSchemaValidationFlags.ProcessIdentityConstraints | XmlSchemaValidationFlags.ProcessInlineSchema | XmlSchemaValidationFlags.ProcessSchemaLocation; // create xml reader XmlReader reader = XmlReader.Create(new StringReader(xml), settings); XmlDocument document = new XmlDocument(); document.Load(reader); document.Validate(new ValidationEventHandler(ValidationHandler));我得到了以下异常：The element 'col' has invalid child element 'textbox'. List of possible elements expected: 'label'我的XSD或C代码有什么问题？（XML是一个很好的例子）？ 最佳答案 问题似乎出在xsd上。您在col元素中指定了一个序列，它希望col如下所示：<col> <label /> <image /> <textbox /> <yesno /> <calendar /> <select /></col>您需要在每个元素上加上minOccurs="0"：<xs:element name="label" type="xs:string" minOccurs="0" />或使用
