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New Message on MumbaiUserGroup
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From: Nasha
Message 1 in Discussion
Hey Group, Today we will discuss Xsd.exe tool. All of us know about xml
serialization and deserialization. When we say xml serialization we mean to say
that we convert an objects public properties into xml attributes and/or xml
elements. You should use Binary Serialization techniques to archive private
data of an object. There is a tool in the .net framework which can help us
creating xml serialization classes,datasets,xml schemas from various xml
formats and even compiled assemblies. 1) Let us get started by creating an
sample xml file containing employee information. <employeeInfo>
<employee>
<empid>1</empid>
<firstname>Namratha</firstname>
<lastname>Shah</lastname>
<sex>F</sex>
<address>
<street>1</street>
<city>mumbai</city>
<state>maharashtra</state>
<pin>400056</pin>
<country>India</country>
</address>
</employee>
</employeeInfo>
2) Name the file as employeeInfo.xml. 3) This tool can be primarily used to
generate xml schema file (.xsd) from an xml data file (.xml). The following
command generates employeeinfo.xsd from employeeinfo.xml :
xsd.exe employeeinfo.xml
You should get a message
Writing file 'C:\xsd\employeeinfo.xsd'. 4) To explore all the options of
xsd.exe type xsd /? 5) This tool can also be used to generate xml
serialization classes and datasets. Now we will generate employeeinfo class and
dataset. 6) To generate a class from schema give /c option and to
generate dataset use /d option
xsd.exe employeeinfo.xsd /c // to generate xml serilization class
xsd.exe employeeinfo.xsd /d // to generate dataset
You should get a message
Writing file 'C:\xsd\employeeinfo.cs'. 7) Xsd.exe is also used to
generate schema of types present in comlied assemblies. 8) Let us generate
our employeeinfo class with the /c option as shown below and then add this
class to a class library and regenerate schema of the class from its dll 9)
Generate the class with the following command xsd.exe employeeinfo.xsd /c . If
you are a VB.Net person than you can use the /l:VB option with it to
generate the class in VB. 10) Open a new class library project (C# or VB).
Add this class to the project, compile the project and create the dll. 11)
Now to generate schema of a type from a compiled assembly :
xsd <Your Dll Name>.dll e.g. xsd EmployeeInfoLib.dll
This will generate the schema of the various types present in the dll
since we have only one class you should get a message
Writing file 'C:\xsd\schema0.xsd'. 12) To generate schema of any
type from a complied assembly the class should be marked with xmlrootattribute.
If you look at the employeeinfo class that we added to the assembly you will
notice xmlroot attribute right at the top of the class declaration. ///
<remarks/>
[System.Xml.Serialization.XmlRootAttribute("employeeInfo", Namespace="",
IsNullable=false)]
public class employeeInfo {
Only classes marked with xmlroot attribute will be recognized by xsd.exe. 13)
If you want to generate schema for any particular type in the assembly you can
use the /type option. We can generate schema of employee address as follows:
xsd <Your Dll Name>.dll /type:rootEmployeeAddress /// check the name in
the class. I hope these articles that I am posting help all of us. If you
have any doubts/sugegstions/improvements/queries etc. please post them I may
not be in a position to reply them immediately as I am working .... but you
will definitely get an answer sooner or later.
-- Please post your queries and comments for my articles in the usergroup for
the benefit of all. I hope this step from my end is helpful to all of us.
Regards,
Namratha (Nasha)
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