镶嵌数据集添加过滤

public static List<ILayer> LoadGdbRasterLayer(string dataYear, List<string> regionCodes)
{
string gdbPath = AppConfig.MapMineThemePicPath;
if (!Directory.Exists(gdbPath)) return null;
List<ILayer> allLayer = new List<ILayer>();
try
{
IWorkspaceFactory gdbWorkspaceFactory = new FileGDBWorkspaceFactoryClass();
IWorkspace pWorkspace = gdbWorkspaceFactory.OpenFromFile(gdbPath, 0);
IEnumDataset pEnumDataset = pWorkspace.get_Datasets(esriDatasetType.esriDTAny);
pEnumDataset.Reset();
IDataset pDataset = pEnumDataset.Next();
while (pDataset != null)
{
if (pDataset is IRasterDataset) //栅格数据集
{

if (!(pDataset.Name.Contains(dataYear.Trim())))
{
pDataset = pEnumDataset.Next();
continue;
}
IRasterWorkspaceEx pRasterWorkspace = (IRasterWorkspaceEx)pWorkspace;
IRasterDataset pRasterDataset = pRasterWorkspace.OpenRasterDataset(pDataset.Name);
//影像金字塔判断与创建
IRasterPyramid3 pRasPyrmid;
pRasPyrmid = pRasterDataset as IRasterPyramid3;
if (pRasPyrmid != null)
{
if (!pRasPyrmid.Present)
{
pRasPyrmid.Create(); //创建金字塔
}
}

ILayer mosaicLayer = RasterFilter(pWorkspace, pDataset.Name) as ILayer;
allLayer.Add(mosaicLayer);
}
pDataset = pEnumDataset.Next();
}
return allLayer;
}
catch (Exception e)
{
Console.WriteLine(e);
return null;
}
}

 

 

/// <summary>
/// 过滤图层显示内容
/// </summary>
private static IMosaicLayer RasterFilter(IWorkspace fgdbWorkspace, string CurrentMosaicDsName)
{

IMosaicDataset mosaicDataset = GetMosaicDataset(fgdbWorkspace, CurrentMosaicDsName);
IMosaicLayer pmoslyr = new MosaicLayerClass();
pmoslyr.CreateFromMosaicDataset(mosaicDataset);
ITableDefinition pTbldef = pmoslyr as ITableDefinition;
pTbldef.DefinitionExpression = StageHelper.CurrentDataParams.ToRasterFilterSql(); //Query Expression
pmoslyr.FootprintLayer.Visible = false;
return pmoslyr;
}

 

 

public static IMosaicDataset GetMosaicDataset(IWorkspace fgdbWorkspace, string CurrentMosaicDsName)
{

IMosaicWorkspaceExtensionHelper mosaicExtHelper = new MosaicWorkspaceExtensionHelperClass();
//根据扩展选择合适的工作空间
IMosaicWorkspaceExtension mosaicExt = mosaicExtHelper.FindExtension(fgdbWorkspace);
//使用IMosaicWorkspaceExtension接口和ICreateMosaicDatasetParameters参数来创建镶嵌数据集
IMosaicDataset theMosaicDataset = null;
try
{
theMosaicDataset = mosaicExt.OpenMosaicDataset(CurrentMosaicDsName);
}
catch (Exception ex)
{
Commons.PublicMethods.CommonMethod.AbnormalLog(ex);
}
return theMosaicDataset;
}