C#+arcengine获得栅格数据的属性表

  此文为或的栅格数据的属性表的功能，在此，我的属性表中有count和value字段，其中value是栅格数据的高程值，count是value在影像中出现的次数，此程序的功能为得到count最大的数，以此来获得对应的value即此栅格影像的高程值的众数，如下：

  /// <summary>

        /// 获得属性表
        /// </summary>
        /// <param name=”maskTifPath”>raster的路径</param>
        private int GetAttributeTable(string maskPath)
        {
           int elevation=0;//高程
            //得到raster（见另外的博文获得栅格数据）
           IRaster raster=GetRaster(maskPath);
          if (raster != null)
           {
               try
                {
                 //得到一段光栅带
                   IRasterBandCollection rasterBandCollection = (IRasterBandCollection)raster;
                  int bandCount = rasterBandCollection.Count;//bandCount=1
                   for (int j = 0; j < bandCount; j++)
                   {
                        IRasterBand rasterBand = rasterBandCollection.Item(j);
                      //得到此光栅带的属性表，并保存到table
                        ITable table = rasterBand.AttributeTable;
                      //创建一个查询（SQL语句）
                      IQueryFilter queryFilter = new QueryFilterClass();
                       queryFilter.WhereClause = “”;
                       //用queryFilter查询表，并把结果保存到游标指针中去
                       ICursor cursorCount = table.Search(queryFilter, false);
                        IRow rowCount = cursorCount.NextRow();
                        //  count字段集合
                       List<int> countCol = new List<int>();
                       int MaxValue = 0;
                       for (int i = 0; i < table.Fields.FieldCount; i++)//field.count=4
                        {
                          //判断字段名称是否为count
                           if (table.Fields.get_Field(i).Name == “Count”)
                           {
                             while (rowCount != null)
                              {
                                    //以下显示Count字段的值，并得到count值的集合
                                  countCol.Add(Convert.ToInt32(rowCount.get_Value(table.FindField(“Count”))));
                                   rowCount = cursorCount.NextRow();
                               }
                                int count = countCol.Count;
                                //得到字段Count的最大值
                             MaxValue = countCol[0];
                               for (int w = 1; w < count; w++)
                               {
                                  if (countCol[w] > MaxValue)
                                   {
                                      MaxValue = countCol[w];
                                  }
                               }
                               //得到Count最大时value的值，即为高程的众数
                              ICursor cursorBinvalues = table.Search(queryFilter, false);
                            IRow rowBinvalues = cursorBinvalues.NextRow();
                             while (rowBinvalues != null)
                              {
                                 int value = Convert.ToInt32(rowBinvalues.get_Value(table.FindField(“Count”)));
                                   if (value == MaxValue)
                               {
                                     elevation = Convert.ToInt32(rowBinvalues.get_Value(table.FindField(“Value”)));
                                 }
                                rowBinvalues = cursorBinvalues.NextRow();
                               }
                        }
                           else
                          {
                               //字段名称不是count，无用，往下判断
                          }
                       }
                   }
                  return elevation;
             }
           catch (Exception ex)
               {
                  Console.WriteLine(ex.Message);
                  return 0;
               }
            }
           else
         {
               MessageBox.Show(“提取栅格数据失败！”);
                return 0;
           }

       }

本文参照了http://blog.csdn.net/gisoracle/article/details/4297650博文，博主很强大，在次拜谢

转载自：https://blog.csdn.net/chhdxzq/article/details/43453569