C# XmlSchema.FindAttribute方法代碼示例

		/// <summary>
		/// Schema Component: 
		///			QName, SimpleType, Scope, Default|Fixed, annotation
		/// </summary>
		internal override int Validate(ValidationEventHandler h, XmlSchema schema)
		{
			if(IsValidated (schema.ValidationId))
				return errorCount;

			// -- Attribute Declaration Schema Component --
			// {name}, {target namespace} -> QualifiedName. Already Compile()d.
			// {type definition} -> attributeType. From SchemaType or SchemaTypeName.
			// {scope} -> ParentIsSchema | isRedefineChild.
			// {value constraint} -> ValidatedFixedValue, ValidatedDefaultValue.
			// {annotation}
			// -- Attribute Use Schema Component --
			// {required}
			// {attribute declaration}
			// {value constraint}

			// First, fill type information for type reference
			if (SchemaType != null) {
				SchemaType.Validate (h, schema);
				attributeType = SchemaType;
			}
			else if (SchemaTypeName != null && SchemaTypeName != XmlQualifiedName.Empty)
			{
				// If type is null, then it is missing sub components .
				XmlSchemaType type = schema.FindSchemaType (SchemaTypeName);
				if (type is XmlSchemaComplexType)
					error(h,"An attribute can't have complexType Content");
				else if (type != null) {	// simple type
					errorCount += type.Validate (h, schema);
					attributeType = type;
				}
				else if (SchemaTypeName == XmlSchemaComplexType.AnyTypeName)
					attributeType = XmlSchemaComplexType.AnyType;
				else if (XmlSchemaUtil.IsBuiltInDatatypeName (SchemaTypeName)) {
					attributeType = XmlSchemaDatatype.FromName (SchemaTypeName);
					if (attributeType == null)
						error (h, "Invalid xml schema namespace datatype was specified.");
				}
				// otherwise, it might be missing sub components.
				else if (!schema.IsNamespaceAbsent (SchemaTypeName.Namespace))
					error (h, "Referenced schema type " + SchemaTypeName + " was not found in the corresponding schema.");
			}

			// Then, fill type information for the type references for the referencing attributes
			if (RefName != null && RefName != XmlQualifiedName.Empty)
			{
				referencedAttribute = schema.FindAttribute (RefName);
				// If el is null, then it is missing sub components .
				if (referencedAttribute != null)
					errorCount += referencedAttribute.Validate (h, schema);
				// otherwise, it might be missing sub components.
				else if (!schema.IsNamespaceAbsent (RefName.Namespace))
					error (h, "Referenced attribute " + RefName + " was not found in the corresponding schema.");
			}

			if (attributeType == null)
				attributeType = XmlSchemaSimpleType.AnySimpleType;

			// Validate {value constraints}
			if (defaultValue != null || fixedValue != null) {
				XmlSchemaDatatype datatype = attributeType as XmlSchemaDatatype;
				if (datatype == null)
					datatype = ((XmlSchemaSimpleType) attributeType).Datatype;
				if (datatype.TokenizedType == XmlTokenizedType.QName)
					error (h, "By the defection of the W3C XML Schema specification, it is impossible to supply QName default or fixed values.");
				else {
					try {
						if (defaultValue != null) {
							validatedDefaultValue = datatype.Normalize (defaultValue);
							datatype.ParseValue (validatedDefaultValue, null, null);
						}
					} catch (Exception ex) {
						// FIXME: This is not a good way to handle exception.
						error (h, "The Attribute's default value is invalid with its type definition.", ex);
					}
					try {
						if (fixedValue != null) {
							validatedFixedValue = datatype.Normalize (fixedValue);
							validatedFixedTypedValue = datatype.ParseValue (validatedFixedValue, null, null);
						}
					} catch (Exception ex) {
						// FIXME: This is not a good way to handle exception.
						error (h, "The Attribute's fixed value is invalid with its type definition.", ex);
					}
				}
			}
			if (Use == XmlSchemaUse.None)
				validatedUse = XmlSchemaUse.Optional;
			else
				validatedUse = Use;

#if NET_2_0
			if (attributeType != null) {
				attributeSchemaType = attributeType as XmlSchemaSimpleType;
				if (attributeType == XmlSchemaSimpleType.AnySimpleType)
					attributeSchemaType = XmlSchemaSimpleType.XsAnySimpleType;
//.........這裏部分代碼省略.........