clsrenderstatlayer.cs

以构建的方式来实现对通用的查询统计

	    {
		    pColor = pEnumColors.Next();
		    ISimpleFillSymbol pFillSymbol = new SimpleFillSymbolClass();
		    //if(iBreakIndex < 1) pColor->put_NullColor(VARIANT_TRUE);
		    pFillSymbol.Color = pColor;
		    pFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;
		    ILineSymbol pLine = new SimpleLineSymbolClass();
		    pLine.Color = pColor;
         pLine.Width = 1;
		    pFillSymbol.Outline = pLine;
		    ISymbol pSym = pFillSymbol as ISymbol;
		    pClassBreaksRenderer.set_Symbol(iBreakIndex, pSym);
        dbValue0 += dbMax / iSegNum;

        pClassBreaksRenderer.set_Break(iBreakIndex, dbValue0);
        string strTemp = "";
        strTemp = dbValue0.ToString("0.00");
		    pClassBreaksRenderer.set_Label(iBreakIndex, strTemp);
		    pClassBreaksRenderer.set_Description(iBreakIndex, strTemp);
	    }
      IFeatureRenderer pFRend = pClassBreaksRenderer as IFeatureRenderer;
	    pGeoFeatureLayer.Renderer = pFRend;
      return true;
    }

    private double GetStatMax(IFeatureLayer pFLayer, string strField)
    {
	    if(pFLayer == null) return 0;
	    IGeoFeatureLayer pGeoLayer = pFLayer as IGeoFeatureLayer;
	    if(pGeoLayer == null) return 0;
	    ITable pTable = pGeoLayer as ITable;
	    if(pTable == null) return 0;
	    IQueryFilter pQueryFilter = new QueryFilterClass();
	    pQueryFilter.AddField(strField);
      
	    IFeatureClass ipFeatureClass = pFLayer.FeatureClass;
      if(ipFeatureClass.FindField(strField) <0) return 0;
	    IFeatureCursor ipFeatureCursor;
	    //------------------------------------------------------------------------
	    //这里有时返回零,和数据有一定的关系,如何来处理
	    ipFeatureCursor = ipFeatureClass.Search(pQueryFilter, false);
      if(ipFeatureCursor == null) return 0;

      ICursor pCursor = ipFeatureCursor as ICursor;	

	    if(pCursor == null) return 0;
	    IDataStatistics pDataStatistics = new DataStatisticsClass();
      pDataStatistics.Cursor = pCursor;
      pDataStatistics.Field = strField;

	    IStatisticsResults  pStatisticsResult;
      pStatisticsResult = pDataStatistics.Statistics;
	    if(pStatisticsResult == null) return 0;
	    double dbMaxValue;
      return pStatisticsResult.Maximum;
    }

    #endregion


    #region "类的辅助函数"
    private string GetRenField()//当有次分组时，只有一个照色字段起作用
    {
      foreach (StatItem var in StatTable.StatItemList)
      {
        if (var.isRenField) return var.fieldName;
      }
      return "";
    }

    private double GetStatMax(IFeatureClass  pFClass)
    {
      if (pFClass == null) return 0.00;
      IFeatureCursor FCursor = clsGISPub.SearchFeature(pFClass, "");
      if (FCursor == null) return 0.00;
      double dbTemp = 0.00;
      while (true)
      {
        IFeature Feat = FCursor.NextFeature();
        if (Feat == null) break;

        if (StatEnv.SecondGroupField == "")//没有次分组
        {
          foreach (StatItem var in StatTable.StatItemList)
          {
            int iFieldIndex = Feat.Fields.FindField(var.fieldName);

            double dd =0;
            if (Feat.get_Value(iFieldIndex) == null || Feat.get_Value(iFieldIndex).ToString() == "") dd = 0;
            else Convert.ToDouble(Feat.get_Value(iFieldIndex));
            if (dd > dbTemp) dbTemp = dd;
          }
        }
        else
        {
          string renFieldName = GetRenField().ToLower();
          foreach (DataColumn var in StatTable.workTable.Columns)
          {
            if (var.ColumnName.ToLower().Contains(renFieldName))
            {
              int iFieldIndex = Feat.Fields.FindField(var.ColumnName);

              double dd = 0;
              if (Feat.get_Value(iFieldIndex) == null || Feat.get_Value(iFieldIndex).ToString() == "") dd = 0;
              else Convert.ToDouble(Feat.get_Value(iFieldIndex));
              if (dd > dbTemp) dbTemp = dd;
            }
          }
        }

      }
      return dbTemp;
   }

    private double GetRowSumMin(IFeatureClass pFClass)
    {
      double dbRetun = 0.0001;
      if (pFClass == null) return dbRetun;
      IFeatureCursor FCursor = clsGISPub.SearchFeature(pFClass, "");
      if (FCursor == null) return dbRetun;
      double dbMin = 9999999;

      while (true)
      {
        IFeature Feat = FCursor.NextFeature();
        if (Feat == null) break;
        double dbTemp = 0;

        if (StatEnv.SecondGroupField == "")//没有次分组
        {
          foreach (StatItem var in StatTable.StatItemList)
          {
            int iFieldIndex = Feat.Fields.FindField(var.fieldName);

            double dd = Convert.ToDouble(Feat.get_Value(iFieldIndex));
            dbTemp += dd;
          }
        }
        else
        {
          string renFieldName = GetRenField().ToLower();
          foreach (DataColumn var in StatTable.workTable.Columns)
          {
            if (var.ColumnName.ToLower().Contains(renFieldName))
            {
              int iFieldIndex = Feat.Fields.FindField(var.ColumnName);

              double dd = Convert.ToDouble(Feat.get_Value(iFieldIndex));
              dbTemp += dd;
            }
          }
        }

      if (dbMin > dbTemp && dbMin > dbRetun) dbMin = dbTemp;

      }
      if (dbMin > dbRetun) return dbMin;
      else return dbRetun;
    }

    IColor GetColor(int i)
    {
      #region "获取颜色"
      IRgbColor pColor = new RgbColorClass();
	    switch(i)
	    {
		    case 1:
          pColor.Red = 255;
          pColor.Green = 0;
          pColor.Blue = 0;
			    return pColor;
		    case 2:
          pColor.Red = 0;
          pColor.Green = 255;
          pColor.Blue = 0;
			    return pColor;
		    case 3:
          pColor.Red = 0;
          pColor.Green = 0;
          pColor.Blue = 255;
			    return pColor;
		    case 4:
          pColor.Red = 0;
          pColor.Green = 255;
          pColor.Blue = 255;
			    return pColor;
		    case 5:
          pColor.Red = 255;
          pColor.Green = 0;
          pColor.Blue = 255;
			    return pColor;
		    case 6:
          pColor.Red = 128;
          pColor.Green = 0;
          pColor.Blue = 0;
			    return pColor;
		    case 7:
          pColor.Red = 0;
          pColor.Green = 0;
          pColor.Blue = 128;
			    return pColor;
		    case 8:
          pColor.Red = 255;
          pColor.Green = 128;
          pColor.Blue = 0;
			    return pColor;
		    case 9:
          pColor.Red = 128;
          pColor.Green = 0;
          pColor.Blue = 255;
			    return pColor;
		    case 10:
          pColor.Red = 128;
          pColor.Green = 128;
          pColor.Blue = 255;
			    return pColor;
		    case 11:
          pColor.Red = 118;
          pColor.Green = 21;
          pColor.Blue = 6;
			    return pColor;
		    case 12:
          pColor.Red = 187;
          pColor.Green = 48;
          pColor.Blue = 207;
			    return pColor;
		    case 13:
          pColor.Red = 221;
          pColor.Green = 0;
          pColor.Blue = 255;
			    return pColor;
		    case 14:
          pColor.Red = 128;
          pColor.Green = 34;
          pColor.Blue = 128;
			    return pColor;
		    case 15:
          pColor.Red = 152;
          pColor.Green = 225;
          pColor.Blue = 30;
			    return pColor;
		    case 16:
          pColor.Red = 253;
          pColor.Green = 147;
          pColor.Blue = 2;
			    return pColor;
		    case 17:
          pColor.Red = 224;
          pColor.Green = 200;
          pColor.Blue = 30;
			    return pColor;
		    case 18:
          pColor.Red = 236;
          pColor.Green = 248;
          pColor.Blue = 7;
			    return pColor;
		    case 19:
          pColor.Red = 194;
          pColor.Green = 61;
          pColor.Blue = 194;
			    return pColor;
		    case 20:
          pColor.Red = 83;
          pColor.Green = 74;
          pColor.Blue = 181;
			    return pColor;
		    default:
          pColor.Red = 0;
          pColor.Green = 0;
          pColor.Blue = 0;
			    return pColor;
	    }	
  #endregion
    }
    #endregion
















  }
}