/// <summary>
/// 通过路径获取工作空间
/// </summary>
/// <param name="eType">要打开的工作空间类别</param>
/// <param name="path">文件或文件夹路径</param>
/// <returns></returns>
public static IWorkspace GetWorkspaceFromFile(string path, EWorkspaceType eType)
{
try
{
IWorkspaceName workspaceName = new WorkspaceNameClass();
workspaceName.WorkspaceFactoryProgID = eType.GetDescription(1);
workspaceName.PathName = path;
IName iName = (IName)workspaceName;
IWorkspace workspace = iName.Open() as IWorkspace;
Marshal.ReleaseComObject(iName);
Marshal.ReleaseComObject(workspaceName);
return(workspace);
}
catch (Exception ex)
{
var msg = ex.Message;
//判断路径长度是否符合要求（Windows默认的字符的长度限制为260，一个中文字符长度为2）（路径超长不一定出错，mdb数据会出错，shp数据不一定出错）
if (!FileOpt.PathLengthValidate(path, out var length))
{
msg += $"\r\n 可能原因为：路径长度超出限制，无法识别“{path}”的数据，请修改数据存放路径\r\n（允许路径最大长度为260，该路径长度为{length}）\r\n";
}
throw new Exception($"打开{eType.GetDescription(2)}工作空间“{path}”出错：{msg}");
}
}
/// <summary>
/// 通过路径获取工作空间
/// </summary>
/// <param name="eType">要打开的工作空间类别</param>
/// <param name="path">文件或文件夹路径</param>
/// <returns></returns>
public static IWorkspace GetWorkspaceFromFile(string path, EWorkspaceType eType)
{
try
{
IWorkspaceName workspaceName = new WorkspaceNameClass();
workspaceName.WorkspaceFactoryProgID = eType.GetDescription(1);
workspaceName.PathName = path;
IName iName = (IName)workspaceName;
return(iName.Open() as IWorkspace);
}
catch (Exception ex)
{
throw new Exception($"打开{eType.GetDescription(2)}工作空间“{path}”出错：{ex.Message}");
}
}
/// <summary>
/// 通过连接字符串获取工作空间，连接字符串参考：
/// <para>①sde： SERVER=ditu.test.com;INSTANCE=5151;DATABASE=sde_test;USER=sa;PASSWORD=sa;VERSION=dbo.DEFAULT</para>
/// <para>②sql： server=localhost;uid=sa;pwd=sa;database=myDatabase</para>
/// <para>③oleDb： Provider=Microsoft.Jet.OLEDB.4.0;Data Source=x:\xxx.mdb;User Id=admin;Password=xxx;</para>
/// </summary>
/// <param name="eType">要打开的工作空间类别</param>
/// <param name="connnectString">连接字符串</param>
/// <returns></returns>
public static IWorkspace GetWorksapceFromConnStr(string connnectString, EWorkspaceType eType)
{
try
{
IWorkspaceName workspaceName = new WorkspaceNameClass();
workspaceName.WorkspaceFactoryProgID = eType.GetDescription(1);
workspaceName.ConnectionProperties = ConnectStringToPropetySet(connnectString);
IName iName = (IName)workspaceName;
return(iName.Open() as IWorkspace);
}
catch (Exception ex)
{
throw new Exception($"打开{eType.GetDescription(2)}工作空间“{connnectString}”出错：{ex.Message}");
}
}
/// <summary>
/// 设置图层数据源
/// </summary>
/// <param name="layer">设置数据源的图层</param>
/// <param name="workspacePath">工作空间路径</param>
/// <param name="dataSetName">数据集名称，数据源不在数据集中则应为null</param>
/// <param name="objectName">图层关联对象的名称，即要素类名称或栅格数据集名称</param>
public static void SetSourcePath(this ILayer layer, string workspacePath, string dataSetName, string objectName)
{
if (!WorkspaceEx.IsWorkspacePath(workspacePath) &&
!WorkspaceEx.IsConnectionString(workspacePath))
{
throw new ArgumentException($"找不到数据源({workspacePath})，请指定正确的数据源！");
}
switch (layer)
{
case IFeatureLayer featureLayer:
if (featureLayer is IDataLayer dataLayer)
{
IDatasetName datasetName = (IDatasetName)dataLayer.DataSourceName;
EWorkspaceType eWorkspaceType = WorkspaceEx.GetDefaultWorkspaceType(workspacePath);
datasetName.WorkspaceName.WorkspaceFactoryProgID = eWorkspaceType.GetDescription(1);
datasetName.WorkspaceName.PathName = workspacePath;
//TODO:
if (!string.IsNullOrWhiteSpace(dataSetName))
{
datasetName.Category = dataSetName;
}
if (!string.IsNullOrWhiteSpace(objectName))
{
datasetName.Name = objectName;
}
}
break;
case IRasterLayer rasterLayer:
objectName = string.IsNullOrWhiteSpace(objectName)
? ((rasterLayer as IDataLayer)?.DataSourceName as IDatasetName)?.Name
: objectName;
if (objectName == null)
{
throw new Exception($"指定数据源名称（参数{nameof(objectName)}）不能为空！");
}
rasterLayer.CreateFromFilePath(!string.IsNullOrWhiteSpace(dataSetName)
? Path.Combine(workspacePath, dataSetName, objectName)
: Path.Combine(workspacePath, objectName));
break;
case IGroupLayer groupLayer:
throw new Exception("该图层对象为图层组(IGroupLayer)，无法设置图层组的数据源，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设置");
}
}
/// <summary>
/// 创建工作空间（地理数据库）
/// </summary>
/// <param name="eType">工作空间类别</param>
/// <param name="parentDirectory">
/// 工作空间所在的父目录，具体为：
/// <para>①shp文件所在文件夹再上一层目录，e.g. c:\gis；</para>
/// <para>②mdb文件所在文件夹，e.g. c:\gis；</para>
/// <para>③dwg文件所在文件夹，e.g. c:\gis；</para>
/// <para>④gdb文件夹的上一层目录，e.g. c:\gis；</para>
/// </param>
/// <param name="strWorkspaceName">
/// 工作空间名称，具体为：
/// <para>①shp文件所在文件夹，e.g. testShpFolder；</para>
/// <para>②mdb文件名，e.g. testMdbFile(.mdb)；</para>
/// <para>③dwg文件所在文件夹，e.g. testCadFolder；</para>
/// <para>④gdb文件夹名，e.g. testGdb(.gdb)；</para>
/// </param>
/// <returns></returns>
public static IWorkspace NewWorkspace(EWorkspaceType eType, string parentDirectory, string strWorkspaceName)
{
if (eType == EWorkspaceType.Default)
{
eType = GetDefaultWorkspaceType(strWorkspaceName);
}
var extension = System.IO.Path.GetExtension(strWorkspaceName);
if (!string.IsNullOrEmpty(extension))
{
strWorkspaceName = strWorkspaceName.Replace(extension, "");
}
switch (eType)
{
case EWorkspaceType.ShapeFile: return(NewWorkspace(new ShapefileWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.FileGDB: return(NewWorkspace(new FileGDBWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.Access: return(NewWorkspace(new AccessWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.CAD: return(NewWorkspace(new CadWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.InMemory: return(NewWorkspace(new InMemoryWorkspaceFactoryClass(), "", strWorkspaceName));
case EWorkspaceType.Sde: return(NewWorkspace(new SdeWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.Excel: return(NewWorkspace(new ExcelWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.TextFile: return(NewWorkspace(new TextFileWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.OleDb: return(NewWorkspace(new OLEDBWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.Raster: return(NewWorkspace(new RasterWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.Sql: return(NewWorkspace(new SqlWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
default: throw new ArgumentException($"未实现创建{eType.GetDescription()}的操作，请联系系统管理员");
}
}
/// <summary>
/// 创建工作空间（地理数据库）
/// </summary>
/// <param name="eType">工作空间类别</param>
/// <param name="parentDirectory">
/// 工作空间所在的父目录，具体为：
/// ①shp文件所在文件夹再上一层目录，e.g. c:\gis；
/// ②mdb文件所在文件夹，e.g. c:\gis；
/// ③dwg文件所在文件夹，e.g. c:\gis；
/// ④gdb文件夹的上一层目录，e.g. c:\gis；
/// </param>
/// <param name="strWorkspaceName">
/// 工作空间名称，具体为：
/// ①shp文件所在文件夹，e.g. testShpFolder；
/// ②mdb文件名，e.g. testMdbFile(.mdb)；//去掉扩展名
/// ③dwg文件所在文件夹，e.g. testCadFolder；
/// ④gdb文件夹名，e.g. testGdb.gdb；
/// </param>
/// <returns></returns>
public static IWorkspace NewWorkspace(EWorkspaceType eType, string parentDirectory, string strWorkspaceName)
{
if (eType == EWorkspaceType.Default)
{
eType = GetDefaultWorkspaceType(strWorkspaceName);
}
switch (eType)
{
case EWorkspaceType.ShapeFile: return(NewWorkspace(new ShapefileWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.FileGDB: return(NewWorkspace(new FileGDBWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.Access: return(NewWorkspace(new AccessWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
case EWorkspaceType.CAD: return(NewWorkspace(new CadWorkspaceFactoryClass(), parentDirectory, strWorkspaceName));
default:
throw new ArgumentException($"未实现创建{eType.GetDescription()}的操作，请联系系统管理员");
}
}
