ARCGIS PRO SDK VB2022 图层要素类类型判断

arcgis pro 常见要素类类型有以下几种：
FeatureLayer            ——要素图层（矢量数据）
RasterLayer              ——栅格图层
MapImageLayer       ——地图图像图层
VectorTileLayer        ——矢量切片图层
SceneLayer              ——场景图层（3D）
GroupLayer             ——组图层
WMSLayer - WMS    ——服务图层
WMTSLayer - WMTS——服务图层

Public Sub ProcessLayer(layer As Layer)
    If layer Is Nothing Then Return

    If TypeOf layer Is FeatureLayer Then
        Dim featureLayer As FeatureLayer = CType(layer, FeatureLayer)
        MessageBox.Show($"要素图层: {featureLayer.Name}")
        
    ElseIf TypeOf layer Is RasterLayer Then
        Dim rasterLayer As RasterLayer = CType(layer, RasterLayer)
        MessageBox.Show($"栅格图层: {rasterLayer.Name}")
        
    ElseIf TypeOf layer Is GroupLayer Then
        Dim groupLayer As GroupLayer = CType(layer, GroupLayer)
        MessageBox.Show($"组图层包含 {groupLayer.Layers.Count} 个子图层")
        
    ElseIf TypeOf layer Is MapImageLayer Then
        Dim mapImageLayer As MapImageLayer = CType(layer, MapImageLayer)
        MessageBox.Show($"地图图像图层: {mapImageLayer.Name}")
        
    Else
        MessageBox.Show($"未知图层类型: {layer.GetType().Name}")
    End If
End Sub