Mapxtreme7.0 主题图透明色

   1:  #region 主题图

   2:   

   3:          private MapInfo.Mapping.Thematics.RangedTheme thm;

   4:   

   5:          private void SetMapGray(string name)

   6:          {

   7:              try

   8:              {

   9:                  ClearTheme();

  10:   

  11:                

  12:                  //全部设置为0

  13:                  MapInfo.Data.MIConnection mapconn = new MapInfo.Data.MIConnection();

  14:                  mapconn.Open();

  15:                  MapInfo.Data.MICommand command = mapconn.CreateCommand();

  16:                  command.CommandText = "update 上海乡镇街道new set num =0";

  17:                  command.ExecuteNonQuery();

  18:                  command.Dispose();

  19:                  mapconn.Close();

  20:   

  21:                  //选择的设置为1

  22:                  string mapsql = "update 上海乡镇街道new  set num = 1 where district like '%" + name + "%'";

  23:                  mapconn = new MapInfo.Data.MIConnection();

  24:                  mapconn.Open();

  25:                  command = mapconn.CreateCommand();

  26:                  command.CommandText = mapsql;

  27:                  command.ExecuteNonQuery();

  28:                  mapconn.Close();

  29:   

  30:   

  31:                  this.mapControl1.Map.DrawingAttributes.EnableTranslucency = true;

  32:                  this.mapControl1.Map.DrawingAttributes.SmoothingMode = SmoothingMode.AntiAlias;

  33:   

  34:   

  35:                  //通过专题图显示

  36:                  MapInfo.Mapping.FeatureLayer flyr = mapControl1.Map.Layers["上海乡镇街道new"] as MapInfo.Mapping.FeatureLayer;

  37:                  thm = new MapInfo.Mapping.Thematics.RangedTheme(flyr, "num", "num", 1, MapInfo.Mapping.Thematics.DistributionMethod.CustomRanges);

  38:   

  39:                  thm.Bins[0].Min = 0;

  40:                  thm.Bins[0].Max = 0;

  41:                  thm.RecomputeBins();

  42:   

  43:   

  44:                  int startAlpha = (int)(255 * 0.25);

  45:                  int endAlpha = (int)(255 * 0.75);

  46:   

  47:                  thm.Bins[0].Style.AreaStyle.Interior = new MapInfo.Styles.SimpleInterior((int)MapInfo.Styles.PatternStyle.Solid, System.Drawing.Color.FromArgb(endAlpha, System.Drawing.Color.LightGray));

  48:                  thm.SpreadBy = MapInfo.Mapping.Thematics.SpreadByPart.Color;

  49:                  thm.ApplyStylePart = MapInfo.Mapping.Thematics.StylePart.Color;

  50:                  thm.ColorSpreadBy = MapInfo.Mapping.Thematics.ColorSpreadMethod.Rgb;

  51:   

  52:   

  53:    

  54:   

  55:                  thm.RecomputeStyles();

  56:   

  57:                  flyr.Modifiers.Append(thm);

  58:   

  59:                  mapControl1.Refresh();

  60:              }

  61:              catch (Exception ex)

  62:              {

  63:                  PubFun.Log.WriteLog(ex.ToString());

  64:              }

  65:          }