MSXML to System.Xml Conversion - Schema Equivalents

Question

Hi ,

I'm trying to convert a project from VB6 to C#. Trying to convert all MSXML2 elements to System.Xml. However i couldnt find the equivalent of ISchemaModelGroup , XMLSchemaCache60, ISchemaItem, ISchemaType, SOMITEMTYPE.  Also i couldnt find the equivalent of nodeTypedValue in System.Xml.XmlNode , namespaces in System.xml.XmlDocument . Can somebody help me with this?

Answer 1

The SOM (schema object model) implementation in the .NET framework sits in http://msdn.microsoft.com/en-us/library/system.xml.schema.aspx. The APIs are however not quite the same as in MSXML's COM based implementation. The closest to XmlSchemaCache is now http://msdn.microsoft.com/en-us/library/system.xml.schema.xmlschemaset.aspx. As for model group, that is represented by http://msdn.microsoft.com/en-us/library/system.xml.schema.xmlschemagroup.aspx I think. I think if you want to port code using MSXML to .NET that involves validating instance documents against W3C schemas then you should start with reading http://msdn.microsoft.com/en-us/library/hdf992b8.aspx.

As for nodeTypedValue, is that used with MSXML and W3C schemas, or only with XDR schemas?

Currently with .NET if you want a typed value for nodes in a tree model then XPathNavigator has support for that, see http://msdn.microsoft.com/en-us/library/system.xml.xpath.xpathnavigator.typedvalue.aspx.

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MVP Data Platform Development My blog

Answer 2

Thanks for the reply

I have a code like this

internal static void WriteValueToNode(System.Xml.XmlNode node, string value)
  {
    if (node.ChildNodes.Count > 1)
   {
                node = node.ChildNodes[0];
   }
   if (value.ToUpper() == "#NULL")
   {

                node.nodeTypedValue = "";    }
   else
   {
                node.nodeTypedValue = value;    }

  }

i couldnt find an equivalent for the nodeTypedValue.  

Answer 3

As long as you want to set the string contents of an element you can simply set http://msdn.microsoft.com/en-us/library/system.xml.xmlnode.innertext.aspx:

  node.InnerText = "";

respectively

  node.InnerText = value;

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MVP Data Platform Development My blog