/// <summary>
/// 获取一个图层数据源所在的要素数据集
/// </summary>
/// <returns></returns>
private static string GetLayerFeatureDataset(IDataLayer dataLayer)
{
string datasetName = null;
try
{
IDatasetName2 datasetName2 = (IDatasetName2)dataLayer.DataSourceName;
IEnumDatasetName enumDatasetName = datasetName2.ControllerNames[esriDatasetType.esriDTFeatureDataset];
IDatasetName ds = enumDatasetName.Next();
datasetName = ds.Name;
}
catch
{
}
return(datasetName);
}
/// <summary>
/// 获取图层数据源完整路径
/// </summary>
/// <param name="layer"></param>
/// <returns></returns>
public static string GetSourcePath(this ILayer layer)
{
switch (layer)
{
case IFeatureLayer featureLayer:
if (featureLayer is IDataLayer dataLayer)
{
IDatasetName2 datasetName = (IDatasetName2)dataLayer.DataSourceName;
var dataSourceType = featureLayer.DataSourceType.ToLower();
var extension = string.Empty;
if (dataSourceType.Contains("shapefile"))
{
extension = ".shp";
}
else if (dataSourceType.Contains("cad"))
{
extension = ".dwg";
}
var featureDatasetName = GetLayerFeatureDataset(dataLayer);
if (featureDatasetName == null)
{
return(Path.Combine(datasetName.WorkspaceName.PathName, datasetName.Name + extension));
}
else
{
return(Path.Combine(datasetName.WorkspaceName.PathName, featureDatasetName, datasetName.Name + extension));
}
}
break;
case IRasterLayer rasterLayer:
return(rasterLayer.FilePath);
case IGroupLayer groupLayer:
throw new Exception("该图层对象为图层组(IGroupLayer)，无法获取图层组的数据源，请指定到具体的图层");
default:
throw new NotImplementedException("图层不是要素图层(IFeatureLayer)，也不是栅格图层(IRasterLayer)，未实现其他类型图层的数据源获取");
}
return(null);
}
