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: }