I’d like to use the DataSet as the container for the XML files conforming to
some schema. The problem is, that the operation of reading the XML file into
the DataSet having its schema and then writing it back to the file makes it
invalid, not obeying rules of this schema.
Here is the simple test program performing this operation.
__________________________________________________
using System;
using System.Data;
namespace DataSetTest
{
class Program
{
static void Main(string[] args)
{
DataSet DS = new DataSet();
DS.ReadXmlSchema ("XMLSchema1.xsd");
DS.ReadXml("XmlFile1.xml", XmlReadMode.IgnoreSchema);
DS.WriteXml("XmlFile2.xml", XmlWriteMode.IgnoreSchema);
}
}
}
__________________________________________________
The schema is contained in the XMLSchema1.xsd file:
__________________________________________________
<?xml version="1.0" encoding="utf-8"?>
<xs:schema id="XMLSchema1"
targetNamespace="http://tempuri.org/XMLSchema1.xsd"
elementFormDefault="qualified" xmlns="http://tempuri.org/XMLSchema1.xsd"
xmlns:mstns="http://tempuri.org/XMLSchema1.xsd"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="Root">
<xs:complexType>
<xs:sequence>
<xs:element name="A" type="ct" />
<xs:element name="B" type="xs:string" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:complexType name="ct">
<xs:attribute name="attribute1" type="xs:string" />
</xs:complexType>
</xs:schema>
__________________________________________________
Here is the valid XML file XMLFile1.xml:
__________________________________________________
<?xml version="1.0" encoding="utf-8" ?>
<Root xmlns="http://tempuri.org/XMLSchema1.xsd">
<A attribute1 ="att"/>
<B>some text</B>
</Root>
__________________________________________________
After transformation we get the XMLFile2.xml, which is invalid:
__________________________________________________
<?xml version="1.0" standalone="yes"?>
<XMLSchema1 xmlns="http://tempuri.org/XMLSchema1.xsd">
<Root>
<B>some text</B>
<A attribute1="att" />
</Root>
</XMLSchema1>
__________________________________________________
The XML is invalid because:
1. The enclosing XMLSchema1 element was added, which is not included in the
schema. This is not difficult to correct this by simple post processing, but
it would be more elegant, if there was a way of avoiding this.
2. The elements A and B have changed order although the schema organizes
them in the sequence structure. This happens, when sequence contains
intermixed simple and complex elements. WriteXml method always outputs simple
elements before complex, disregarding schema. I could not find any trivial
method of correcting this. It seems that the information about the order is
lost in the DataSet for such case.
I’ll be obliged for suggestions. 2 1671
What version of the framework are you using?
"MaLec" <Ma***@discussions.microsoft.com> wrote in message
news:F7**********************************@microsof t.com... I'd like to use the DataSet as the container for the XML files conforming
to some schema. The problem is, that the operation of reading the XML file
into the DataSet having its schema and then writing it back to the file makes
it invalid, not obeying rules of this schema.
Here is the simple test program performing this operation. __________________________________________________ using System; using System.Data; namespace DataSetTest { class Program { static void Main(string[] args) { DataSet DS = new DataSet(); DS.ReadXmlSchema ("XMLSchema1.xsd"); DS.ReadXml("XmlFile1.xml", XmlReadMode.IgnoreSchema); DS.WriteXml("XmlFile2.xml", XmlWriteMode.IgnoreSchema); } } } __________________________________________________
The schema is contained in the XMLSchema1.xsd file: __________________________________________________ <?xml version="1.0" encoding="utf-8"?> <xs:schema id="XMLSchema1" targetNamespace="http://tempuri.org/XMLSchema1.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/XMLSchema1.xsd" xmlns:mstns="http://tempuri.org/XMLSchema1.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Root"> <xs:complexType> <xs:sequence> <xs:element name="A" type="ct" /> <xs:element name="B" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> <xs:complexType name="ct"> <xs:attribute name="attribute1" type="xs:string" /> </xs:complexType> </xs:schema> __________________________________________________
Here is the valid XML file XMLFile1.xml: __________________________________________________ <?xml version="1.0" encoding="utf-8" ?> <Root xmlns="http://tempuri.org/XMLSchema1.xsd"> <A attribute1 ="att"/> <B>some text</B> </Root> __________________________________________________
After transformation we get the XMLFile2.xml, which is invalid: __________________________________________________ <?xml version="1.0" standalone="yes"?> <XMLSchema1 xmlns="http://tempuri.org/XMLSchema1.xsd"> <Root> <B>some text</B> <A attribute1="att" /> </Root> </XMLSchema1> __________________________________________________
The XML is invalid because: 1. The enclosing XMLSchema1 element was added, which is not included in
the schema. This is not difficult to correct this by simple post processing,
but it would be more elegant, if there was a way of avoiding this. 2. The elements A and B have changed order although the schema organizes them in the sequence structure. This happens, when sequence contains intermixed simple and complex elements. WriteXml method always outputs
simple elements before complex, disregarding schema. I could not find any trivial method of correcting this. It seems that the information about the order
is lost in the DataSet for such case.
I'll be obliged for suggestions.
Environment.Version.ToString() returns: 2.0.50727.42
"Zafar Abbas" wrote: What version of the framework are you using?
"MaLec" <Ma***@discussions.microsoft.com> wrote in message news:F7**********************************@microsof t.com... I'd like to use the DataSet as the container for the XML files conforming to some schema. The problem is, that the operation of reading the XML file into the DataSet having its schema and then writing it back to the file makes it invalid, not obeying rules of this schema.
Here is the simple test program performing this operation. __________________________________________________ using System; using System.Data; namespace DataSetTest { class Program { static void Main(string[] args) { DataSet DS = new DataSet(); DS.ReadXmlSchema ("XMLSchema1.xsd"); DS.ReadXml("XmlFile1.xml", XmlReadMode.IgnoreSchema); DS.WriteXml("XmlFile2.xml", XmlWriteMode.IgnoreSchema); } } } __________________________________________________
The schema is contained in the XMLSchema1.xsd file: __________________________________________________ <?xml version="1.0" encoding="utf-8"?> <xs:schema id="XMLSchema1" targetNamespace="http://tempuri.org/XMLSchema1.xsd" elementFormDefault="qualified" xmlns="http://tempuri.org/XMLSchema1.xsd" xmlns:mstns="http://tempuri.org/XMLSchema1.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:element name="Root"> <xs:complexType> <xs:sequence> <xs:element name="A" type="ct" /> <xs:element name="B" type="xs:string" /> </xs:sequence> </xs:complexType> </xs:element> <xs:complexType name="ct"> <xs:attribute name="attribute1" type="xs:string" /> </xs:complexType> </xs:schema> __________________________________________________
Here is the valid XML file XMLFile1.xml: __________________________________________________ <?xml version="1.0" encoding="utf-8" ?> <Root xmlns="http://tempuri.org/XMLSchema1.xsd"> <A attribute1 ="att"/> <B>some text</B> </Root> __________________________________________________
After transformation we get the XMLFile2.xml, which is invalid: __________________________________________________ <?xml version="1.0" standalone="yes"?> <XMLSchema1 xmlns="http://tempuri.org/XMLSchema1.xsd"> <Root> <B>some text</B> <A attribute1="att" /> </Root> </XMLSchema1> __________________________________________________
The XML is invalid because: 1. The enclosing XMLSchema1 element was added, which is not included in the schema. This is not difficult to correct this by simple post processing, but it would be more elegant, if there was a way of avoiding this. 2. The elements A and B have changed order although the schema organizes them in the sequence structure. This happens, when sequence contains intermixed simple and complex elements. WriteXml method always outputs simple elements before complex, disregarding schema. I could not find any trivial method of correcting this. It seems that the information about the order is lost in the DataSet for such case.
I'll be obliged for suggestions. This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics
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