问题描述
我正在尝试创建一个分隔平面文件模式,该模式将处理以下文件格式:
"ID","Surname","FirstName"{CR}{LF}
"FINAL","123","abc"{CR}{LF}
以上仅为一个记录。以“ FINAL”开头的行是可选行。
文件中的多个记录如下所示:
"ID","abc"{CR}{LF}
"ID","456","def"{CR}{LF}
或者,它也可能如下所示:
"ID","FirstName"{CR}{LF}
"ID","abc"{CR}{LF}
上面的最后一个示例包含一个没有可选“ FINAL”行的记录,并继续其下的新记录。但是,在这种情况下,我会收到一个错误消息(原因:包装字符“”不匹配。)
我注意到,如果文件包含{CR} {LF}来代替缺少的可选“ FINAL”行,如下所示:
"ID","FirstName"{CR}{LF}
{CR}{LF}
"ID","abc"{CR}{LF}
它似乎可以正常工作,但是我将接收文件而没有任何多余的{CR} {LF}来代替缺少的可选行。
模式中是否有需要设置的属性来解决此问题?可选子记录的MinOccurs设置为0。
解决方法
我将使用带有标签标识符的选择组
<?xml version="1.0" encoding="utf-16"?>
<xs:schema xmlns="http://Scratch.MSDNFF" xmlns:b="http://schemas.microsoft.com/BizTalk/2003" targetNamespace="http://Scratch.MSDNFF" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:annotation>
<xs:appinfo>
<b:schemaInfo standard="Flat File" root_reference="Root" default_pad_char=" " pad_char_type="char" count_positions_by_byte="false" parser_optimization="speed" lookahead_depth="3" suppress_empty_nodes="false" generate_empty_nodes="true" allow_early_termination="false" early_terminate_optional_fields="false" allow_message_breakup_of_infix_root="false" compile_parse_tables="false" />
<schemaEditorExtension:schemaInfo namespaceAlias="b" extensionClass="Microsoft.BizTalk.FlatFileExtension.FlatFileExtension" standardName="Flat File" xmlns:schemaEditorExtension="http://schemas.microsoft.com/BizTalk/2003/SchemaEditorExtensions" />
</xs:appinfo>
</xs:annotation>
<xs:element name="Root">
<xs:annotation>
<xs:appinfo>
<b:recordInfo structure="delimited" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" sequence_number="1" child_order="postfix" child_delimiter_type="hex" child_delimiter="0x0D 0x0A" />
</xs:appinfo>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:annotation>
<xs:appinfo>
<b:groupInfo sequence_number="0" />
</xs:appinfo>
</xs:annotation>
<xs:choice minOccurs="0" maxOccurs="unbounded">
<xs:annotation>
<xs:appinfo>
<b:groupInfo sequence_number="1" />
</xs:appinfo>
</xs:annotation>
<xs:element name="ID">
<xs:annotation>
<xs:appinfo>
<b:recordInfo structure="delimited" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" tag_name=""ID"," child_order="infix" child_delimiter_type="char" child_delimiter="," sequence_number="1" />
</xs:appinfo>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:annotation>
<xs:appinfo>
<b:groupInfo sequence_number="0" />
</xs:appinfo>
</xs:annotation>
<xs:element name="Firstname" type="xs:string">
<xs:annotation>
<xs:appinfo>
<b:fieldInfo sequence_number="1" justification="left" wrap_char_type="char" wrap_char=""" />
</xs:appinfo>
</xs:annotation>
</xs:element>
<xs:element name="Surname" type="xs:string">
<xs:annotation>
<xs:appinfo>
<b:fieldInfo sequence_number="2" justification="left" wrap_char_type="char" wrap_char=""" />
</xs:appinfo>
</xs:annotation>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element minOccurs="0" name="FINAL">
<xs:annotation>
<xs:appinfo>
<b:recordInfo structure="delimited" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" tag_name=""FINAL"," sequence_number="2" />
</xs:appinfo>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:annotation>
<xs:appinfo>
<b:groupInfo sequence_number="0" />
</xs:appinfo>
</xs:annotation>
<xs:element name="Number" type="xs:string">
<xs:annotation>
<xs:appinfo>
<b:fieldInfo justification="left" wrap_char_type="char" wrap_char=""" sequence_number="1" />
</xs:appinfo>
</xs:annotation>
</xs:element>
<xs:element name="Letters" type="xs:string">
<xs:annotation>
<xs:appinfo>
<b:fieldInfo justification="left" wrap_char_type="char" wrap_char=""" sequence_number="2" />
</xs:appinfo>
</xs:annotation>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element minOccurs="0" maxOccurs="unbounded" name="Empty">
<xs:annotation>
<xs:appinfo>
<b:recordInfo structure="delimited" preserve_delimiter_for_empty_data="true" suppress_trailing_delimiters="false" sequence_number="3" />
</xs:appinfo>
</xs:annotation>
<xs:complexType>
<xs:sequence>
<xs:annotation>
<xs:appinfo>
<b:groupInfo sequence_number="0" />
</xs:appinfo>
</xs:annotation>
<xs:element name="Field" type="xs:string">
<xs:annotation>
<xs:appinfo>
<b:fieldInfo sequence_number="1" justification="left" />
</xs:appinfo>
</xs:annotation>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>