arcengine镶嵌数据集的基本操作（C#）

/// <summary>
/// 创建镶嵌数据集
/// </summary>
/// <param name="pFgdbWorkspace">工作空间</param>
/// <param name="pMDame">名称</param>
/// <param name="pSrs">空间参考</param>
/// <returns>镶嵌数据集</returns>
public static IMosaicDataset CreateMosaicDataset(IWorkspace pFgdbWorkspace, string pMDame, ISpatialReference pSrs)
{
try
{
IWorkspaceFactory pWorkspaceFactory = new FileGDBWorkspaceFactory();
ICreateMosaicDatasetParameters pCreationPars = new CreateMosaicDatasetParametersClass();

pCreationPars.BandCount = 3;
pCreationPars.PixelType = rstPixelType.PT_UCHAR;
IMosaicWorkspaceExtensionHelper pMosaicExentionHelper = new MosaicWorkspaceExtensionHelperClass();
IMosaicWorkspaceExtension pMosaicExtention = pMosaicExentionHelper.FindExtension(pFgdbWorkspace);
return pMosaicExtention.CreateMosaicDataset(pMDame, pSrs, pCreationPars, "DOM");
}
catch (Exception)
{
return null;
}
}

/// <summary>
/// 获取镶嵌数据集
/// </summary>
/// <param name="MosaicName">数据集名称</param>
/// <param name="workspace">数据集所在工作空间</param>
/// <returns>镶嵌数据集</returns>
public static IMosaicDataset GetMosaicDataset(string MosaicName, IWorkspace workspace)
{
IMosaicDataset pMosicDataset = null;
IMosaicWorkspaceExtensionHelper pMosaicWsExHelper = new MosaicWorkspaceExtensionHelperClass();
IMosaicWorkspaceExtension pMosaicWsExt = pMosaicWsExHelper.FindExtension(workspace);
if (pMosaicWsExt != null)
{
try
{
pMosicDataset = pMosaicWsExt.OpenMosaicDataset(MosaicName);
}
catch (Exception ex)
{
return pMosicDataset;
}
}
return pMosicDataset;
}

/// <summary>
/// 获取镶嵌数据表
/// </summary>
/// <param name="pMosaicDataset">镶嵌数据集</param>
/// <returns>镶嵌数据表</returns>
public static ITable GetMosaicDatasetTable(IMosaicDataset pMosaicDataset)
{
ITable pTable = null;
IEnumName pEnumName = pMosaicDataset.Children;
pEnumName.Reset();
ESRI.ArcGIS.esriSystem.IName pName;
while ((pName = pEnumName.Next()) != null)
{
pTable = pName.Open() as ITable;
int i = pTable.Fields.FieldCount;
if (i >= 21) break;
}
return pTable;
}

/// <summary>
/// 删除镶嵌数据集
/// </summary>
/// <param name="rasterName">名称</param>
/// <param name="workspace">工作空间</param>
/// <returns>删除成功时返回true,否则返回false</returns>
public static bool DeleteMosaic(string rasterName, IWorkspace workspace)
{
try
{
IMosaicWorkspaceExtensionHelper pMosaicWsExHelper = new MosaicWorkspaceExtensionHelperClass();
IMosaicWorkspaceExtension pMosaicWsExt = pMosaicWsExHelper.FindExtension(workspace);
pMosaicWsExt.DeleteMosaicDataset(rasterName);
return true;
}
catch (Exception ex)
{
return false;
}
}

/// <summary>
/// 导入栅格数据
/// </summary>
/// <param name="filePath">导入文件路径</param>
/// <param name="mosaicDataSet">镶嵌数据集</param>
public static bool ImportRasterToMosaic(string filePath, IMosaicDataset mosaicDataSet)
{
try
{
IWorkspaceFactory workspaceFactory = new RasterWorkspaceFactoryClass();
IRasterWorkspace rasterWorkspace = workspaceFactory.OpenFromFile(System.IO.Path.GetDirectoryName(filePath), 0) as IRasterWorkspace;
IMosaicDatasetOperation mOp = (IMosaicDatasetOperation)mosaicDat
a3ca
aSet;
IAddRastersParameters addRs = new AddRastersParametersClass();
IRasterDatasetCrawler rsDsetCrawl = new RasterDatasetCrawlerClass();
rsDsetCrawl.RasterDataset = rasterWorkspace.OpenRasterDataset(System.IO.Path.GetFileName(filePath));
IRasterTypeFactory rsFact = new RasterTypeFactoryClass();
IRasterType rsType = rsFact.CreateRasterType("Raster dataset");
rsType.FullName = rsDsetCrawl.DatasetName;
addRs.Crawler = (IDataSourceCrawler)rsDsetCrawl;
addRs.RasterType = rsType;
mOp.AddRasters(addRs, null);
//计算cellSize 和边界
// Create a calculate cellsize ranges parameters object.
ICalculateCellSizeRangesParameters computeArgs = new CalculateCellSizeRangesParametersClass();
// Use the mosaic dataset operation interface to calculate cellsize ranges.
mOp.CalculateCellSizeRanges(computeArgs, null);
// Create a build boundary parameters object.
IBuildBoundaryParameters boundaryArgs = new BuildBoundaryParametersClass();
// Set flags that control boundary generation.
boundaryArgs.AppendToExistingBoundary = true;
// Use the mosaic dataset operation interface to build boundary.
mOp.BuildBoundary(boundaryArgs, null);
return true;
}
catch (Exception)
{

return false;
}

}

/// <summary>
/// 导出镶嵌数据集为删格数据
/// </summary>
/// <param name="RasterName">数据名称</param>
/// <param name="workspaceDB">工作空间</param>
/// <param name="DownLoadLocation">保存路径</param>
/// <returns>成功返回true，失败返回false</returns>
public static bool DownLoadMosaic( string RasterName,IWorkspace workspaceDB,string DownLoadLocation)
{
try
{
IWorkspace wsGDB = null;
IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactoryClass();
//判断是GDB文件还是普通文件夹
string locationForm =DownLoadLocation.Substring(DownLoadLocation.Length - 4, 4).ToUpper();
if (locationForm == ".GDB")
{
wsGDB = workspaceFactory.OpenFromFile(@"" + DownLoadLocation, 0);
}
else
{
IRasterWorkspace rasterWorkspace = SetRasterWorkspace(DownLoadLocation);
wsGDB = (IWorkspace)rasterWorkspace;
}
IMosaicWorkspaceExtensionHelper mosaicHelper = new  MosaicWorkspaceExtensionHelperClass();
IMosaicWorkspaceExtension mosaicWs = mosaicHelper.FindExtension(workspaceDB);
IMosaicDataset mosaic = mosaicWs.OpenMosaicDataset(RasterName);
IFunctionRasterDataset functionDS = (IFunctionRasterDataset)mosaic;

ISaveAs rasterSaveAs = (ISaveAs)functionDS;
if (locationForm == ".GDB")
{
rasterSaveAs.SaveAs(RasterName, wsGDB, "GDB");
}
else
{
rasterSaveAs.SaveAs(RasterName+".tif", wsGDB, "TIFF");
}

return true;
}
catch
{
return false;
}
}