mapxtreme最新版_mapxtreme_mapxtreme 售价(5)

// MapInfo.Data.Table table

=MapInfo.Engine.Session.Current.Catalog.CreateTable(tableInfo);

MapInfo.Mapping.FeatureLayer featureLayer =

newMapInfo.Mapping.FeatureLayer(table);

this.mapControl1.Map.Layers.Add(featureLayer);

return table;

}

private void AddFeaturesAndSave()

{

MapInfo.Styles.SimpleLineStyle LineStyle =

newMapInfo.Styles.SimpleLineStyle(new

MapInfo.Styles.LineWidth(1,MapInfo.Styles.LineWidthUnit.Point));

MapInfo.Styles.CompositeStyle compositeStyle =

newMapInfo.Styles.CompositeStyle(null,LineStyle, null, null);

MapInfo.Geometry.CoordSys coordSys =mapControl1.Map.GetDisplayCoordSys();

MapInfo.Data.Table table = CreateNewMapDataTable("NewTable");

MapInfo.Data.TableInfo tableInfo = table.TableInfo;

while(……)

{

MapInfo.Data.Feature feature = newMapInfo.Data.Feature(tableInfo.Columns);

feature.Geometry = ……

feature.Style = ……

feature["ID"] = ……

table.InsertFeature(feature);

}

tableInfo.WriteTabFile(); //保存为.tab文件

mapControl1.Refresh();

}

10 计算缩放比例

/**//// <summary>

/// 重画控件时计算缩放比例

/// </summary>

/// <param></param>

/// <param></param>

protected void mapControl1_Paint(object sender,PaintEventArgs e)

{

MapInfo.Geometry.Distance zoomDistance=this.mapControl1.Map.Zoom;

double zoom=Convert.ToDouble(Convert.ToInt32(zoomDistance.Value*16.09))/10;

this.statusBar1.Text="缩放比例："+zoom.ToString()+" 千米";

}

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