S A M P L E S

Converting between value object types with different namespaces

Since SOAP value objects are defined within a WSDL, the same value object types can be generated in different namespaces.   SOAP proxies and value objects must have the same namespace to be used together.   This often presents a problem when devising solutions that use dynamic ArcGIS Server value objects you have generated and ArcGIS Server value objects in another product for which you cannot change the namespace.   For example, assume you generate a set of dynamic value objects with the namespace "wsmap".   If you create a wsmap.Envelope and attempt to use it with an ESRI.ArcGIS.ADF.ArcGISServer.SpatialFilter (included with the ArcGIS Server Web ADF)  by assigning it to the FilterGeometry property, a compile time error will occur.   In general, the types are different because the namespaces are different.   If you have complete control over the generation of SOAP proxies and value objects, you can generate value object types that can be shared across ArcGIS Server service types (e.g. PolygonN is included with every ArcGIS Server service type).   If you are unable to modify the namespace for SOAP proxies and value objects, you can use the following code to convert between namespaces.   In the example, a PolylineN created dynamically is being converted to an ESRI.ArcGIS.ADF.ArcGISServer.PolylineN.   The .NET System.Xml.Serialization.XmlSerializer is used to serialize and deserialize the SOAP value object to and from a string.  

// Serialize value object into SOAP string

Type valueType = dynamicSoapPolylineN.GetType();

System.Xml.Serialization.XmlSerializer xmlSerializer =

  new System.Xml.Serialization.XmlSerializer(valueType);
 

System.Text.StringBuilder stringBuilder = new StringBuilder();

System.IO.StringWriter stringWriter = new System.IO.StringWriter(stringBuilder);

xmlSerializer.Serialize(stringWriter, dynamicSoapPolylineN);

string soapSerializedValueObject = stringBuilder.ToString();

// Read SOAP string to deserialize to same type, different namespace

System.Xml.XmlTextReader xmlTextReader =

  new System.Xml.XmlTextReader(new System.IO.StringReader(soapSerializedValueObject));

System.Xml.Serialization.XmlSerializer mySerializer = new

  System.Xml.Serialization.XmlSerializer

  (typeof(ESRI.ArcGIS.ADF.ArcGISServer.PolylineN));

object newValueObject = mySerializer.Deserialize(xmlTextReader);

ESRI.ArcGIS.ADF.ArcGISServer.PolylineN adfSoapPolylineN =

  (ESRI.ArcGIS.ADF.ArcGISServer.PolylineN)newValueObject;