/// <summary>
/// 设置地图为固定比例尺模式，并设定其比例尺（及显示范围和坐标系）
/// </summary>
/// <param name="mapFrame">地图数据框</param>
/// <param name="nScale">比例尺</param>
/// <param name="featureEnv">显示范围，值为null时不修改显示范围</param>
/// <param name="spatialRef">坐标系，值为null是不修改坐标系</param>
public static void SetMapScale(this IMapFrame mapFrame, double nScale,
IEnvelope featureEnv = null, ISpatialReference spatialRef = null)
{
#region ArcGIS 9.3版本使用的代码
//if (spatialRef != null)
// mapFrame.Map.SpatialReference = spatialRef;
//if (featureEnv != null)
// (mapFrame.Map as IActiveView).Extent = featureEnv;
//mapFrame.ExtentType = esriExtentTypeEnum.esriExtentScale;
//mapFrame.MapScale = nScale;
#endregion
#region ArcGIS 10.0及以上版本使用的代码
if (spatialRef != null)
{
mapFrame.Map.SpatialReference = spatialRef;
}
if (featureEnv != null)
{
((IActiveView)mapFrame.Map).Extent = featureEnv;
}
IMapAutoExtentOptions mapAutoExtentOptions = mapFrame.Map as IMapAutoExtentOptions;
mapAutoExtentOptions.AutoExtentType = esriExtentTypeEnum.esriExtentScale;//使用固定比例尺模式
if (nScale != 0.0)
{
mapAutoExtentOptions.AutoExtentScale = nScale;
}
#endregion
}
/// <summary>
/// 设置地图为固定比例尺模式，并设定其比例尺
/// </summary>
public static void SetMapScale(this IMap map, double scale)
{
#region ArcGIS 10.0及以上版本使用的代码
IMapAutoExtentOptions mapAutoExtentOptions = map as IMapAutoExtentOptions;
mapAutoExtentOptions.AutoExtentType = esriExtentTypeEnum.esriExtentScale;//使用固定比例尺模式
mapAutoExtentOptions.AutoExtentScale = scale;
#endregion
}
private void frmExtendSet_Load(object sender, EventArgs e)
{
if (this.Map != null)
{
this.Extend = (this.Map as IActiveView).Extent;
if (this.Map.LayerCount > 0)
{
IEnumLayer layer = this.Map.get_Layers(null, true);
layer.Reset();
for (ILayer layer2 = layer.Next(); layer2 != null; layer2 = layer.Next())
{
if (((layer2 is IFeatureLayer) &&
((layer2 as IFeatureLayer).FeatureClass.ShapeType == esriGeometryType.esriGeometryPolygon)) &&
((layer2 as IFeatureLayer).FeatureClass.FeatureCount(null) > 0))
{
this.cboLayers.Items.Add(new LayerObject(layer2));
}
}
if (this.cboLayers.Items.Count > 0)
{
this.cboLayers.SelectedIndex = 0;
}
}
this.rdoLayerExtend.Enabled = this.cboLayers.Items.Count > 0;
if (this.ClipGeometry != null)
{
this.rdoCustomExtend.Checked = true;
this.method_0(this.ClipGeometry.Envelope);
}
else if (this.ExtendType == ExtendSetType.Range)
{
if (this.Map is IMapAutoExtentOptions)
{
IMapAutoExtentOptions map = this.Map as IMapAutoExtentOptions;
if (map.AutoExtentBounds != null)
{
this.rdoCustomExtend.Checked = true;
this.method_0(map.AutoExtentBounds);
}
else
{
this.method_0((this.Map as IActiveView).Extent);
}
}
}
else if (this.ExtendType == ExtendSetType.FullExtentRange)
{
this.method_0((this.Map as IActiveView).FullExtent);
}
else if (this.Map is IMapClipOptions)
{
if ((this.Map as IMapClipOptions).ClipType == esriMapClipType.esriMapClipMapExtent)
{
this.rdoCurrentMapExtend.Checked = true;
this.method_0((this.Map as IActiveView).Extent);
}
else if ((this.Map as IMapClipOptions).ClipType == esriMapClipType.esriMapClipShape)
{
this.rdoCustomExtend.Checked = true;
if ((this.Map as IMapClipOptions).ClipGeometry != null)
{
this.method_0((this.Map as IMapClipOptions).ClipGeometry.Envelope);
}
else
{
this.method_0((this.Map as IActiveView).Extent);
}
}
}
if (this.Map is IGraphicsContainerSelect)
{
this.rdoGraphicsExtend.Enabled = (this.Map as IGraphicsContainerSelect).ElementSelectionCount > 0;
}
}
}
