public static void EditLine()
{
Document doc = Application.DocumentManager.MdiActiveDocument;
Database db = doc.Database;
// 事务处理器
Autodesk.AutoCAD.DatabaseServices.TransactionManager tm = db.TransactionManager;
// 开始第一个事务处理 tr1
using (Transaction tr1 = tm.StartTransaction())
{
Point3d ptStart = Point3d.Origin;
Point3d ptEnd = new Point3d(100, 0, 0);
Line line1 = new Line(ptStart, ptEnd);
ObjectId id1 = db.AddToModelSpace(line1); // 添加直线到数据库中
// 开始第二个事务处理 tr2
using (Transaction tr2 = tm.StartTransaction())
{
line1.UpgradeOpen(); // 切换line1的状态为可写
line1.ColorIndex = 1; // 设置直线的颜色为红色
ObjectId id2 = id1.Copy(ptStart, ptEnd); // 复制直线
id2.Rotate(ptEnd, Math.PI / 2);
// 开始第三个事务处理 tr3
using (Transaction tr3 = tm.StartTransaction())
{
Line line2 = (Line)tr3.GetObject(id2, OpenMode.ForWrite);
line2.ColorIndex = 3; // 设置直线的颜色为绿色
tr3.Abort(); // 撤销第三个事务处理tr3，line2的颜色不变
}
// 提交第二个事务处理tr2，line1颜色变为红色，复制line1并旋转90度
tr2.Commit();
}
tr1.Commit(); // 提交第一个事务处理tr1，添加line1到数据库中
}
}
private void Process(ObjectId id)
{
RevObject obj;
try
{
if (id is RevObject)
{
obj = (RevObject)id;
if (obj.has(COMPLETE))
{
return;
}
_revWalk.parseHeaders(obj);
}
else
{
obj = _revWalk.parseAny(id);
if (obj.has(COMPLETE))
{
return;
}
}
}
catch (IOException e)
{
throw new TransportException("Cannot Read " + id.Name, e);
}
switch (obj.Type)
{
case Constants.OBJ_BLOB:
ProcessBlob(obj);
break;
case Constants.OBJ_TREE:
ProcessTree(obj);
break;
case Constants.OBJ_COMMIT:
ProcessCommit(obj);
break;
case Constants.OBJ_TAG:
ProcessTag(obj);
break;
default:
throw new TransportException("Unknown object type " + id.Name + " (" + obj.Type + ")");
}
// If we had any prior errors fetching this object they are
// now resolved, as the object was parsed successfully.
//
_fetchErrors.Remove(id.Copy());
}
private void Process(ObjectId id)
{
RevObject obj;
try
{
RevObject ro = (id as RevObject);
if (ro != null)
{
obj = ro;
if (obj.has(COMPLETE))
{
return;
}
_revWalk.parseHeaders(obj);
}
else
{
obj = _revWalk.parseAny(id);
if (obj.has(COMPLETE))
{
return;
}
}
}
catch (IOException e)
{
throw new TransportException("Cannot Read " + id.Name, e);
}
obj.DisposeBody();
switch (obj.Type)
{
case Constants.OBJ_BLOB:
ProcessBlob(obj);
break;
case Constants.OBJ_TREE:
ProcessTree(obj);
break;
case Constants.OBJ_COMMIT:
ProcessCommit(obj);
break;
case Constants.OBJ_TAG:
ProcessTag(obj);
break;
default:
throw new TransportException("Unknown object type " + id.Name + " (" + obj.Type + ")");
}
_fetchErrors.Remove(id.Copy());
}
private void Process(ObjectId id)
{
RevObject obj;
try
{
if (id is RevObject)
{
obj = (RevObject)id;
if (obj.has(COMPLETE))
return;
_revWalk.parseHeaders(obj);
}
else
{
obj = _revWalk.parseAny(id);
if (obj.has(COMPLETE))
return;
}
}
catch (IOException e)
{
throw new TransportException("Cannot Read " + id.Name, e);
}
obj.DisposeBody();
switch (obj.Type)
{
case Constants.OBJ_BLOB:
ProcessBlob(obj);
break;
case Constants.OBJ_TREE:
ProcessTree(obj);
break;
case Constants.OBJ_COMMIT:
ProcessCommit(obj);
break;
case Constants.OBJ_TAG:
ProcessTag(obj);
break;
default:
throw new TransportException("Unknown object type " + id.Name + " (" + obj.Type + ")");
}
_fetchErrors.Remove(id.Copy());
}
/// <summary>Construct a MissingObjectException for the specified object id.</summary>
/// <remarks>
/// Construct a MissingObjectException for the specified object id.
/// Expected type is reported to simplify tracking down the problem.
/// </remarks>
/// <param name="id">SHA-1</param>
/// <param name="type">object type</param>
public MissingObjectException(ObjectId id, string type) : base(MessageFormat.Format
(JGitText.Get().missingObject, type, id.Name))
{
missing = id.Copy();
}
private void Process(ObjectId id)
{
RevObject obj;
try
{
if (id is RevObject)
{
obj = (RevObject)id;
if (obj.has(COMPLETE))
return;
_revWalk.parseHeaders(obj);
}
else
{
obj = _revWalk.parseAny(id);
if (obj.has(COMPLETE))
return;
}
}
catch (IOException e)
{
throw new TransportException("Cannot Read " + id.Name, e);
}
switch (obj.Type)
{
case Constants.OBJ_BLOB:
ProcessBlob(obj);
break;
case Constants.OBJ_TREE:
ProcessTree(obj);
break;
case Constants.OBJ_COMMIT:
ProcessCommit(obj);
break;
case Constants.OBJ_TAG:
ProcessTag(obj);
break;
default:
throw new TransportException("Unknown object type " + id.Name + " (" + obj.Type + ")");
}
// If we had any prior errors fetching this object they are
// now resolved, as the object was parsed successfully.
//
_fetchErrors.Remove(id.Copy());
}
