IMapServer3.QueryRasterValue Method

Returns the Raster content that meet the selection criteria for the specified table.

[Visual Basic .NET]
Public Function QueryRasterValue ( _
    ByVal MapName As String, _
    ByVal sourceTableID As Integer, _
    ByVal rowIDs As ILongArray, _
    ByVal FieldName As String, _
    ByVal rasterValueType As IImageType _
) As IImageResults

[C#]
public IImageResults QueryRasterValue (
    string MapName,
    int sourceTableID,
    ILongArray rowIDs,
    string FieldName,
    IImageType rasterValueType
);

[C++]
HRESULT QueryRasterValue(
  BSTR MapName,
  long sourceTableID,
  ILongArray* rowIDs,
  BSTR FieldName,
  IImageType* rasterValueType,
  IImageResults** ppImageResults
);

[C++]

Parameters
MapName [in]
  MapName is a parameter of type BSTR
sourceTableID [in]
  sourceTableID is a parameter of type long
rowIDs [in]

  rowIDs is a parameter of type ILongArray
FieldName [in]
  FieldName is a parameter of type BSTR
rasterValueType [in]

  rasterValueType is a parameter of type IImageType
ppImageResults [out, retval]

  ppImageResults is a parameter of type IImageResults

Product Availability

Remarks

An array of IImageResult3. IImageResult3 contains the returned mime type and either the url to the image or the mime data itself.

The ImageResult in the resultant array are returned in the same order the OIDs are passed in. If the feature does not have any raster data, a null is returned.

RasterFieldName is optional since a layer can have only one raster field. In case of join, you may need to pass in the field name, if an empty string is passed the raster field from the base table will be used.

OutImageType is optional as well. When a null is passed in as outImageType, jpeg and url are used as the default image format and returned type respectively.

See Also