Deserialization

[PeterW]

I have an xml file containing some stuff.

I use xsd to generate a schema and again to create classes from the schemas.

added using System, System.IO;
added [Serializable] to all classes
added namespace ROC
added deserialize() method as follows to AWLR2 class:

public AWLR2 deserialize(string xmlString)
{
AWLR2 awlr2;
try
{
StringReader sr = new StringReader(xmlString);
XmlSerializer ser = new XmlSerializer(this.GetType());
awlr2=(AWLR2)ser.Deserialize(sr);
}
catch(Exception ex)
{
System.Diagnostics.EventLog.WriteEntry("BizTalk Redemptions",
ex.ToString());
throw ex;
}

return awlr2;
}

I attempt to deserialize from a string using the same xml with escaped
quotes to prove it all works and we start with the problems.

The escaped text is as follows:

<AWLR2 xmlns=\"http://Schemas_cares.AWLR2\"><D-1A-1 xmlns=\"\"><LL:LincList
xmlns:LL=\"http://Schemas_cares.LincList\"><Row><Col
Index=\"1\">00200170601</Col><Col Index=\"2\">002001706</Col><Col
Index=\"3\"></Col></Row><Row><Col Index=\"1\">00200170601</Col><Col
Index=\"2\">014628102</Col><Col Index=\"3\"></Col></Row><Row><Col
Index=\"1\">03639200702</Col><Col Index=\"2\">026269507</Col><Col
Index=\"3\"></Col></Row><Row><Col Index=\"1\">03306230708</Col><Col
Index=\"2\">026880902</Col><Col Index=\"3\"></Col></Row><Row><Col
Index=\"1\">03306230708</Col><Col Index=\"2\">033062307</Col><Col
Index=\"3\"></Col></Row><Row><Col Index=\"1\">03639200702</Col><Col
Index=\"2\">036502207</Col><Col Index=\"3\"></Col></Row><Row><Col
Index=\"1\">03850780601</Col><Col Index=\"2\">038507806</Col><Col
Index=\"3\"></Col></Row><Row><Col Index=\"1\">03850780601</Col><Col
Index=\"2\">038588908</Col><Col
Index=\"3\"></Col></Row></LL:LincList></D-1A-1></AWLR2>

I call the deserialize() method and it does not throw any exceptions.

I try to reference objects that should have been created on deserialization
and whilst AWLR2 exists, the objects that AWLR2 should have, do not.

My unit test reports the text passed correctly, and the existence of the
awlr2 object.
Console.WriteLine("awlr2 exists: " + (awlr2 != null).ToString()); //OK

but not
Console.WriteLine("Items exists: " + (awlr2.Items != null).ToString());
This throws NullReferenceException.

Any ideas please. I have checked all the attributes created by xsd on the
properties of the classes and they seem fine. Serialization is not a
problem. Just deserialization.

cheers

PeterW

[Kevin Yu [MSFT]]

Hi PeterW,

I'm trying to make a repro on my machine, so could you please provide me
with the AWLR2 class here?

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[PeterW]

Kevin

The code generated by xsd.exe is as follows: (my contributions are
namespace, using statements, [Serializable] attributes and deserialize()
method on AWLR2 class.
----------------------

using System;
using System.Xml.Serialization;
using System.IO;

namespace ROC
{
/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(Namespac e="http://Schemas_cares.AWLR2")]
[System.Xml.Serialization.XmlRootAttribute(Namespac e="http://Schemas_cares.AWLR2", IsNullable=false)]
[Serializable]
public class AWLR2
{

/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("D-1A-1",
Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public AWLR2D1A1[] Items;

public AWLR2 deserialize(string xmlString)
{
AWLR2 awlr2;
try
{
StringReader sr = new StringReader(xmlString);
XmlSerializer ser = new XmlSerializer(this.GetType());
awlr2=(AWLR2)ser.Deserialize(sr);
}
catch(Exception ex)
{
System.Diagnostics.EventLog.WriteEntry("BizTalk Redemptions",
ex.ToString());
throw ex;
}

return awlr2;
}
}

/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(Namespac e="http://Schemas_cares.AWLR2")]
[Serializable]
public class AWLR2D1A1
{

/// <remarks/>
[System.Xml.Serialization.XmlArrayAttribute(Namespa ce="http://Schemas_cares.LincList")]
[System.Xml.Serialization.XmlArrayItemAttribute("Ro w",
Form=System.Xml.Schema.XmlSchemaForm.Unqualified,
Namespace="http://Schemas_cares.LincList", IsNullable=false)]
public LincListRow[] LincList;
}

/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(Namespac e="http://Schemas_cares.LincList")]
[Serializable]
public class LincListRow
{

/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("Col" ,
Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public LincListRowCol[] Col;

/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public string[] Text;
}

/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(Namespac e="http://Schemas_cares.LincList")]
[Serializable]
public class LincListRowCol
{

/// <remarks/>
[System.Xml.Serialization.XmlAttributeAttribute()]
public string Index;

/// <remarks/>
[System.Xml.Serialization.XmlTextAttribute()]
public string[] Text;
}

/// <remarks/>
[System.Xml.Serialization.XmlTypeAttribute(Namespac e="http://Schemas_cares.LincList")]
[System.Xml.Serialization.XmlRootAttribute(Namespac e="http://Schemas_cares.LincList", IsNullable=false)]
[Serializable]
public class LincList
{

/// <remarks/>
[System.Xml.Serialization.XmlElementAttribute("Row" ,
Form=System.Xml.Schema.XmlSchemaForm.Unqualified)]
public LincListRow[] Row;
}
}

------------------------------------------------
awlr2.xsd is as follows:

<?xml version="1.0" encoding="utf-16" ?>
- <xs:schema xmlns:mstns="http://Schemas_cares.AWLR2"
xmlns:msdata="urn:schemas-microsoft-com:xml-msdata"
xmlns:app1="http://Schemas_cares.LincList"
xmlns:b="http://schemas.microsoft.com/BizTalk/2003"
attributeFormDefault="qualified" elementFormDefault="qualified"
targetNamespace="http://Schemas_cares.AWLR2" id="AWLR2"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:import schemaLocation="awlr2_app1.xsd"
namespace="http://Schemas_cares.LincList" />
- <xs:annotation>
- <xs:appinfo>
- <b:references>
<b:reference targetNamespace="http://Schemas_cares.LincList" />
</b:references>
</xs:appinfo>
</xs:annotation>
- <xs:element msdata:IsDataSet="true" msdata:Locale="en-GB" name="AWLR2">
- <xs:complexType>
- <xs:choice maxOccurs="unbounded">
- <xs:element form="unqualified" name="D-1A-1">
- <xs:complexType>
- <xs:sequence>
<xs:element ref="app1:LincList" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:schema>
--------------------------------------------------

LincList.xsd is as follows:

<?xml version="1.0" encoding="utf-16" ?>
- <xs:schema xmlns="http://Schemas_cares.LincList"
xmlns:b="http://schemas.microsoft.com/BizTalk/2003"
elementFormDefault="unqualified"
targetNamespace="http://Schemas_cares.LincList"
xmlns:xs="http://www.w3.org/2001/XMLSchema">
- <xs:element name="LincList">
- <xs:complexType>
- <xs:sequence>
- <xs:element minOccurs="0" maxOccurs="unbounded" form="unqualified"
name="Row">
- <xs:complexType mixed="true">
- <xs:sequence>
- <xs:element minOccurs="0" maxOccurs="unbounded" form="unqualified"
name="Col">
- <xs:complexType mixed="true">
<xs:attribute form="unqualified" name="Index" type="xs:string" />
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
--
Can't think of anything else you might need to replicate what I have here.

cheers

PeterW
"Kevin Yu [MSFT]" wrote:

Hi PeterW,

I'm trying to make a repro on my machine, so could you please provide me
with the AWLR2 class here?

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[Kevin Yu [MSFT]]

Hi PeterW,

Thanks for your repro code. Based on my test, the deserialization process
works fine. You can try to modify new XmlSerializer(this.GetType()); into
new XmlSerializer(typeof(AWLR2));

You can also make it a static method like

public static AWLR2 deserialize(string xmlString)

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[PeterW]

Thanks Kevin

Problem as always was at the human end of the keyboard! None so blind as
those who will not see.

cheers
--
PeterW
"Kevin Yu [MSFT]" wrote:

Hi PeterW,

Thanks for your repro code. Based on my test, the deserialization process
works fine. You can try to modify new XmlSerializer(this.GetType()); into
new XmlSerializer(typeof(AWLR2));

You can also make it a static method like

public static AWLR2 deserialize(string xmlString)

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[Kevin Yu [MSFT]]

You're welcome. So you mean this fixes the problem?

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[PeterW]

Yes, all sorted now. I was dumb enough to try to use the object I had
instantiated instead of the return value of the deserialize method. As I
said, none so blind as those who will not see. Your comment about
recommending making the method static helped make the penny drop. :-)

cheers
--
PeterW
"Kevin Yu [MSFT]" wrote:

You're welcome. So you mean this fixes the problem?

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."

[Kevin Yu [MSFT]]

It was nice to hear that you have had the problem resolved. Thanks for
sharing your experience with all the people here. If you have any
questions, please feel free to post them in the community.

Kevin Yu
=======
"This posting is provided "AS IS" with no warranties, and confers no
rights."