/// <summary>
/// Create an array of FileItem objects based on a data object that contains
/// FileContents
/// </summary>
/// <param name="dataObject">data object containing FileContents</param>
/// <returns>Array of FileItem objects. Returns null if the FileContents
/// could not be extracted from the passed dataObject</returns>
public static FileItem[] CreateArrayFromDataObject(IDataObject dataObject)
{
try
{
// get the ole data object
OleDataObject oleDataObject = OleDataObject.CreateFrom(dataObject);
if (oleDataObject == null)
{
Debug.Fail("Unable to access OleDataObject!");
return(null);
}
// get an array of file descriptors specifying the file contents
FileDescriptor[] fileDescriptors =
FileContentsHelper.GetFileDescriptors(dataObject);
// allocate a FileItem object for each descriptor
FileItem[] fileItems = new FileItem[fileDescriptors.Length];
// initialize the file items
for (int i = 0; i < fileDescriptors.Length; i++)
{
fileItems[i] = new FileItemFromFileContents(
fileDescriptors[i], oleDataObject, i);
}
// return the file items
return(fileItems);
}
// this is a sketchy operation involving all kinds of interop voodoo,
// if we fail in release mode it is likely due to a drop source giving
// us invalid or unexpected data -- handle this gracefully while
// logging the error
catch (Exception e)
{
Debug.Fail("Unexpected error accessing FileContents", e.Message);
return(null);
}
}
/// <summary>
/// Create an array of file items based on the specified data object
/// </summary>
/// <param name="dataObject">data object</param>
/// <returns>array of file items</returns>
public FileItem[] CreateFileItems(IDataObject dataObject)
{
return(FileItemFromFileContents.CreateArrayFromDataObject(dataObject));
}
/// <summary>
/// Create an array of FileItem objects based on a data object that contains
/// FileContents
/// </summary>
/// <param name="dataObject">data object containing FileContents</param>
/// <returns>Array of FileItem objects. Returns null if the FileContents
/// could not be extracted from the passed dataObject</returns>
public static FileItem[] CreateArrayFromDataObject(IDataObject dataObject)
{
try
{
// get the ole data object
OleDataObject oleDataObject = OleDataObject.CreateFrom(dataObject);
if (oleDataObject == null)
{
Debug.Fail("Unable to access OleDataObject!");
return null;
}
// get an array of file descriptors specifying the file contents
FileDescriptor[] fileDescriptors =
FileContentsHelper.GetFileDescriptors(dataObject);
// allocate a FileItem object for each descriptor
FileItem[] fileItems = new FileItem[fileDescriptors.Length];
// initialize the file items
for (int i = 0; i < fileDescriptors.Length; i++)
{
fileItems[i] = new FileItemFromFileContents(
fileDescriptors[i], oleDataObject, i);
}
// return the file items
return fileItems;
}
// this is a sketchy operation involving all kinds of interop voodoo,
// if we fail in release mode it is likely due to a drop source giving
// us invalid or unexpected data -- handle this gracefully while
// logging the error
catch (Exception e)
{
Debug.Fail("Unexpected error accessing FileContents", e.Message);
return null;
}
}