/// <summary>
/// Initializes a new instance of the <see cref="ComSerializable{T}" /> class.
/// </summary>
/// <param name="info">The information.</param>
/// <param name="context">The context.</param>
protected ComSerializable(SerializationInfo info, StreamingContext context)
{
byte[] data = (byte[])info.GetValue("DATA", typeof(byte[]));
string progId = info.GetString("PROGID");
using (ComReleaser com = new ComReleaser())
{
IMemoryBlobStream blob = new MemoryBlobStreamClass();
com.ManageLifetime(blob);
IMemoryBlobStreamVariant variant = (IMemoryBlobStreamVariant)blob;
variant.ImportFromVariant(data);
IObjectStream stream = new ObjectStreamClass();
stream.Stream = blob;
com.ManageLifetime(stream);
Type t = Type.GetTypeFromProgID(progId);
IPersistStream persist = (IPersistStream)Activator.CreateInstance(t);
persist.Load(stream);
this.Value = (T)persist;
}
}
/// <summary>
/// Each BuilderItem contains a Function Raster Dataset which is used to create the thumbnail.
/// The thumbnail is created by Nearest Neighbor resampling of the Function Raster Dataset.
/// The resampled raster is exported as a byte array and saved Into the IMemoryBlobStreamVariant.
/// The blob is then inserted into the Thumbnail field.
/// </summary>
/// <param name="mybuilderItem">Item containing the Function Dataset to be added to the Mosaic Dataset</param>
private void Resampling(IBuilderItem mybuilderItem)
{
try
{
IFunctionRasterDataset pFuncRasterDataset = mybuilderItem.Dataset; // Get the FunctionRasterDataset from mybuilderItem
IRasterDataset pRasterDataset;
pRasterDataset = (IRasterDataset)pFuncRasterDataset; // Cast the FunctionRasterDataset to Raster Dataset
IPropertySet thePropSet = pFuncRasterDataset.Properties; // Get the properties of the raster Dataset
IRaster praster = pRasterDataset.CreateDefaultRaster(); // Create default raster from the above raster dataset
praster.ResampleMethod = rstResamplingTypes.RSP_NearestNeighbor; // The raster is resampled by RSP_NearestNeighbor
IRasterProps pRasterProps = (IRasterProps)praster; // Raster properties are used to update the height, width of the raster
pRasterProps.Height = 256;
pRasterProps.Width = 256;
IRasterExporter pConverter = new RasterExporterClass(); // IRasterExporter object is used to convert the raster to byte array.
byte[] pBytesArr;
pBytesArr = pConverter.ExportToBytes(praster, "TIFF"); // Convert the resampled Raster to a Byte array
IMemoryBlobStream memBlobStream = new MemoryBlobStream(); // Create new IMemoryBlobStream
IMemoryBlobStreamVariant varBlobStream = (IMemoryBlobStreamVariant)memBlobStream; // Assign to IMemoryBlobStreamVariant
object anObject = pBytesArr;
varBlobStream.ImportFromVariant(anObject); // IMemoryBlobStreamVariant object is assigned the byte array
thePropSet.SetProperty("ThumbNail", memBlobStream); // and saved to the property "ThumbNail"
}
catch (Exception ex)
{
System.Exception myExc = new System.Exception(
"Error: Failed to Re-Sampled the raster.Thumbnails will not be created." + ex.Message, ex);
throw myExc;
}
return;
}