mapxtreme最新版_mapxtreme_mapxtreme 售价(2)

OnFeatureUnclick();

}

4 放大缩小地图

/**//// <summary>

/// 放大地图

/// </summary>

/// <param>放大倍数，有效值1－10</param>

public void ZoomIn(uint times)

{

if(times<1 || times>10) return;

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

mapControl1.Map.Zoom=new MapInfo.Geometry.Distance(previousZoom.Value/

(2*times),previousZoom.Unit);

}

/**//// <summary>

/// 缩小地图

/// </summary>

/// <param>缩小倍数,有效值1－10</param>

public void ZoomOut(uint times)

{

if(times<1 || times>10) return;

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

mapControl1.Map.Zoom=new MapInfo.Geometry.Distance(previousZoom.Value*

(2*times),previousZoom.Unit);

}

5 移动层的顺序

mapControl1.Map.Layers.Move(index1,index2);

6 图元/图层透明

/**//// <summary>

/// 设置层的透明与否

/// </summary>

/// <param>层名</param>

/// <param>不透明类型 ALL 全部不透明 BORDER 只有边界不透明（内部透明）

NONE 全部透明</param>

/// <param>如果是边界不透明，此处设置边界颜色</param>

public void LayerTransparent(string layerName,OpaqueType opaqueType,System.Drawing.Color

borderColor)

{

MapInfo.Styles.CompositeStyle compositeStyle = GetOpaqueStyle(opaqueType,borderColor);

//创建连接和命令来更新table中的数据

MapInfo.Data.MIConnection connection=new MapInfo.Data.MIConnection();

connection.Open();

MapInfo.Data.MICommand command=connection.CreateCommand();

command.CommandText = "update " + layerName + " set obj=obj,MI_Style=@style";

command.Parameters.Add("@style",compositeStyle);

command.Prepare();

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