ArcGIS Engine 中對柵格資料的波段資訊統計

先開啟柵格檔案所在的工作空間(檔案),然後擷取其所有的波段,訪問每一個波段
有時候波段中已經有長條圖或統計資訊,有時候沒有這些資訊,可以使用ComputeStatsAndHist()函數對其進行計算
(資料量較大時,可能耗時較長)

IWorkspaceFactory workspaceFactory = new RasterWorkspaceFactory();
IWorkspace workspace;
workspace = workspaceFactory.OpenFromFile(filePath, 0);

IRasterWorkspace rastWork = (IRasterWorkspace)workspace;
IRasterDataset rastDataset = rastWork.OpenRasterDataset(pathBox.Text.Substring(pathBox.Text.LastIndexOf("\\") + 1));
IRasterDataset2 rd2 = rastDataset as IRasterDataset2;
IRaster raster = rd2.CreateFullRaster();
IRasterBandCollection rbc = (IRasterBandCollection)raster;
for (int i = 0; i < rbc.Count; i++)
{
    IRasterBand rb = rbc.Item(i);
    bool tmpBool ;
    rb.HasStatistics(out tmpBool);
    if(!tmpBool)
        rb.ComputeStatsAndHist();
    IRasterHistogram rh = rb.Histogram;
    IRasterStatistics rs = rb.Statistics;
}