documentum DFS下载指定的文件

通过DFS 下载指定的文件

下载文件要用 objectService服务的 Get 方法.

先上实例代码

public static DataObject GetContent(ObjectIdentity objIdentity)
        {
            try
            {
                ObjectIdentitySet objectIdSet = new ObjectIdentitySet();
                List<ObjectIdentity> objIdList = objectIdSet.Identities;
                objIdList.Add(objIdentity);

                //OperationOptions operationOptions = null;
                OperationOptions operationoptions = new OperationOptions();

                PropertyProfile propertyprofile = new PropertyProfile();
                propertyprofile.FilterMode = (PropertyFilterMode.ALL_NON_SYSTEM);

                ContentTransferProfile contenttransferprofile = new ContentTransferProfile();
                contenttransferprofile.TransferMode = (ContentTransferMode.MTOM);

                ContentProfile contentprofile = new ContentProfile();
                contentprofile.FormatFilter = (FormatFilter.ANY);
                contentprofile.PageFilter = (PageFilter.ANY);
                contentprofile.PageModifierFilter = (PageModifierFilter.ANY);

                operationoptions.Profiles.AddRange(new Emc.Documentum.FS.DataModel.Core.Profiles.Profile[] {
            contenttransferprofile, propertyprofile, contentprofile});
                DataPackage dataPackage = objectService.Get(objectIdSet, operationoptions);
                if (dataPackage.DataObjects.Count > 0)
                {
                    return dataPackage.DataObjects[0];
                }
            }
            catch (Exception e)
            {
                //Console.WriteLine("Failed with exception " + e.Message);
            }
            finally
            {
                //sampleContentManager.DeleteTestCabinet();
            }
            return null;
        }

ObjectIdentity  对象 DFS 的解释是:

An ObjectIdentity instance contains a repository name and a unique identifier
 that can take various forms, specified by Emc.Documentum.FS.DataModel.Core.ObjectIdentityType
 enum constants. When constructing a DataObject to pass to the create operation,
 or in any case when the DataObject represents a repository object that does
not yet exist, the ObjectIdentity need only be populated with a repository
 name. If the ObjectIdentity does contain a unique identifier, it must represent
 an existing repository object.

ObjectIdentityType 包含

UNDEFINED = 0,
//
// Summary:
// Object ID represents some proprietary mechanism (public URI structure is
// not required) for combining object and repository identification. For example
// in Documentum, ObjectId would be a string based identifier with position
// encoded repository ID. This repository ID can be uniquely mapped to a repositoryName.
// Object ID would normally require persistent object schema helpers to identify
// repository name.
OBJECT_ID = 1,
//
// Summary:
// A set of properties that together (logical AND) compose the object identity.
// Note that PropertyBasedIdentity also contains repositoryName necessary to
// globally identify the object.
OBJECT_KEY = 2,
//
// Summary:
// Object Path is used to identify the object. Path object contains a string
// based path expression, repository name as well as optional path type.
OBJECT_PATH = 3,
//
// Summary:
// Qualification object is used, containing qualification expression as well
// as repository name. For example, Qualification object can contain a portion
// of a DQL query without "select attr_list" clause. Constraint: If Qualification
// is used as object identity it must be resolvable to a unique object.
QUALIFICATION = 4,
//
// Summary:
// An object id made up of more than one attribute. Works like a composite key.
COMPOSITE_OBJECT_ID = 5,
//
// Summary:
// Any URI structure compliant identity of the object. It must include/encode
// repository identification and thus represent a complete global object reference
// with PUBLIC structure. Example: "documentum:/dm_notes/12345"
STRING_URI = 6

因此 通过object_id 并下载到本地文件夹中 代码为 

 public static string GetContentById(string objectId, string localDirName)
        {
            ObjectId op = new ObjectId(objectId);
            ObjectIdentity objIdentity = new ObjectIdentity(op, DFSConfig.Repository);
            return GetContent(objIdentity, localDirName);   
        }

　　通过 文件路径下载文件的代码为 

        public static string GetContentByPath(string path,string localDir) {
            ObjectPath op = new ObjectPath(path);
            ObjectIdentity objIdentity = new ObjectIdentity(op, DFSConfig.Repository);
            return GetContent(objIdentity, localDir);            
        }

　　

调用方法分别为:
　　DFSCore.GetContentById("09030d41800001c3", "d:\\download");

//System 为文件柜的名称(cabinet)
//test 为文件夹名称
DFSCore.GetContentByPath("/System/test", "d:\\download");