adding a single variable to a dataset

i'm trying write basic c# forms application reads xml config file,   displays data in datagridview user edit, , saves changes   xml config file. works fine except user wants add version number or datatimestamp file everytime it's written out. have is:  xml file format  <config_data>  <version>1.1</version>  <record>   <name>jen</name>   <num>5</num>  </record>  <record>   <name>joe</name>   <num>6</num>  </record>......
  read in xml file , set dataset:  xmlreader xmlfile;  //create xml reader , read in file  avds=new dataset;  avds.readxml(xmlfile);  
i set databinding bind datagridview dataset:  datagridview.datasource=ds;  datgridview.datamember="record";  
and when user hits save write out:  xmlwriter xmlfile;  ds.writexml(xmlfile);  
but writes out data in <record> fields i've shown user editing. since i'm writing dataset directly xml file i'm not sure how can stick version number in xml file without having reopen file using xml writer , manually insert version number.

hi jmh1819，

  welcome msdn forum support.

  feel can refer msdn magzine for getting q&a conversations. talking question.

 

q can tell me best way bind xml data datagridview control?

a simplest possible solution load xml dataset , bind that. solution use xml serialization create object graph xml , bind that. bind raw xml, need create wrapper classes implement itypedlist, ibindinglist, , icustomtypedescriptor.

  meanwhile, here detailed implementations can refer to:

  building xml applications .net framework 2.0 

  can use xmltextwriter compose xml structure used to be bound datagridview control according datasource property.

  using xml datagridview source  

  sincerely,

  jason wang

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jason wang [msft]
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