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List Data Retrieval Web Service

Windows SharePoint Services 3
An adapter service that provides a method for performing queries against SharePoint lists.

To access this Web service set a Web reference to http://<site>/_vti_bin/DspSts.asmx.

For an example that shows how to use this service, see the Query method.

  Class Description
Public class AllFields Used in a query to specify that all the fields be returned from the data source.
Public class Authentication Represents the authentication mode that is used to connect to the back-end server.
Public class DataRoot Represents the root of the content document for a particular adapter instance.
Public class DspQuery Defines the filter used in a query against a data source provider.
Public class DSQuery Represents a query used by a data retrieval service.
Public class Field Represents a single column in a query.
Public class Fields Represents the collection of columns that are included in a query.
Public class OrderField Represents the column by which the result is ordered.
Public class PTQuery Represents a pass-through query.
Public class QueryRequest Represents the request in a query.
Public class RequestHeader Represents the request header in a query.
Public class ServerParameter Represents a server parameter required by the server containing the data source.
Public class ServerParameterInfo Represents information about the parameters used by the server containing the data source.
Public class StsAdapter Represents the adapter service used to perform queries against sites and lists in Windows SharePoint Services.
Public class Versions Represents the versions of the data retrieval service that are supported by an adapter or the versions being used in a query.
  Enumeration Description
Public enumeration ColumnMappingType Indicates the type of XML format used for data returned in a query.
Public enumeration DocumentType Specifies the document type for a request.
Public enumeration MethodType Specifies the action of the request.
Public enumeration OrderDirection Specifies the direction in which a field or column is sorted.
Public enumeration ResultContentType Indicates the type of content that is returned through a query.
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SoapException: Failed to verify user permissions

If you receive SoapException: Failed to verify user permissions when submitting a query to this service, try disabling Anonymouse Authentication in IIS. For some reason this service doesn't work with Anonymouse access enabled.

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Access URL
http://[yourservername]/_vti_bin/dspsts.asmx
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Better documentation...
The documentation for this web service is really minimal in the Wss3 documentation, have a look at the Wss2 documentation at http://msdn2.microsoft.com/en-us/library/ms995670.aspx for way better documentation.
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