How to Delete Layer using C#.NET.

Anonymous · ‎01-12-2009

Hey,
How to Delete Layer using C#.NET.
I have tried Erase method of LayerTableRecord but it is giving me error.
Please take me out of this.
I hv searched forum but not found any relevance ans.

Anonymous · ‎01-12-2009

Show the code that is not working so someone can
help you fix it...

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<proplantvr> wrote in message
href="news:6102564@discussion.autodesk.com">news:6102564@discussion.autodesk.com...
Hey,
How to Delete Layer using C#.NET. I have tried Erase method of
LayerTableRecord but it is giving me error. Please take me out of this. I hv
searched forum but not found any relevance ans.

Anonymous · ‎01-12-2009

This is a function i have used to delete all layers that i hv created using function createLayer() --->
private void eraseLayers()
{
Database db = HostApplicationServices.WorkingDatabase;
Editor editor = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;

try
{
using (Transaction tran = db.TransactionManager.StartTransaction())
{
LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId, OpenMode.ForWrite);

SymbolTableEnumerator sysTabEnum = layerTable.GetEnumerator();

while (sysTabEnum.MoveNext() == true)
{
ObjectId objEntr = (ObjectId)sysTabEnum.Current;
LayerTableRecord ltr = (LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name);
ltr.Erase();
}
tran.Commit();
}
}
catch (System.Exception e)
{
editor.WriteMessage("Error in iterateLayers :: " + e.Message);
}
}

Anonymous · ‎01-12-2009

No need to enumerate the table as you can just
check the layertable.Has() method. See

the tags use here to post so we can read you
code...

size=2><code>
[code]
{code}

      using (Transaction tr =


db.TransactionManager.StartTransaction())

{
        LayerTable layerTable
=

(LayerTable)tr.GetObject(db.LayerTableId,
OpenMode.ForRead);
        //drawing may
have objects that use this
layer...
        if
((layerTable.Has(layername) &&

          layerTable[layername]
!= db.Clayer))

{
          LayerTableRecord ltr
=

(LayerTableRecord)

tr.GetObject(layerTable["foo"],
OpenMode.ForRead);


          if (ltr !=
null)

{

ltr.UpgradeOpen();

ltr.Erase();

tr.Commit();

}

}

}
{code}
[/code]
</code>

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<proplantvr> wrote in message
href="news:6102599@discussion.autodesk.com">news:6102599@discussion.autodesk.com...
This
is a function i have used to delete all layers that i hv created using
function createLayer() ---> private void eraseLayers() { Database db =
HostApplicationServices.WorkingDatabase; Editor editor =
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
try { using (Transaction tran = db.TransactionManager.StartTransaction()) {
LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId,
OpenMode.ForWrite); SymbolTableEnumerator sysTabEnum =
layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) { ObjectId
objEntr = (ObjectId)sysTabEnum.Current; LayerTableRecord ltr =
(LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); } tran.Commit(); }
} catch (System.Exception e) { editor.WriteMessage("Error in iterateLayers ::
" + e.Message); } }

Anonymous · ‎01-12-2009

Actually this looks like crap in the
webbrowser...

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"Paul Richardson" <prichardson<lastpoint> wrote in message
href="news:6102696@discussion.autodesk.com">news:6102696@discussion.autodesk.com...

No need to enumerate the table as you can just
check the layertable.Has() method. See

the tags use here to post so we can read you
code...

size=2><code>
[code]
{code}

      using (Transaction tr =


db.TransactionManager.StartTransaction())

{
        LayerTable layerTable
=

(LayerTable)tr.GetObject(db.LayerTableId,
OpenMode.ForRead);
        //drawing may
have objects that use this
layer...
        if
((layerTable.Has(layername) &&


layerTable[layername] !=
db.Clayer))

{
          LayerTableRecord
ltr =

(LayerTableRecord)

tr.GetObject(layerTable["foo"],
OpenMode.ForRead);


          if (ltr !=
null)

{

ltr.UpgradeOpen();

ltr.Erase();

tr.Commit();

}

}

}
{code}
[/code]
</code>

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

<proplantvr> wrote in message
href="news:6102599@discussion.autodesk.com">news:6102599@discussion.autodesk.com...
This
is a function i have used to delete all layers that i hv created using
function createLayer() ---> private void eraseLayers() { Database db
= HostApplicationServices.WorkingDatabase; Editor editor =
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
try { using (Transaction tran = db.TransactionManager.StartTransaction()) {
LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId,
OpenMode.ForWrite); SymbolTableEnumerator sysTabEnum =
layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) { ObjectId
objEntr = (ObjectId)sysTabEnum.Current; LayerTableRecord ltr =
(LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); } tran.Commit();
} } catch (System.Exception e) { editor.WriteMessage("Error in iterateLayers
:: " + e.Message); } }

Anonymous · ‎01-12-2009

missed a 'foo'. change to match variable you
use for

layername...

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"Paul Richardson" <prichardson<lastpoint> wrote in message
href="news:6102696@discussion.autodesk.com">news:6102696@discussion.autodesk.com...

No need to enumerate the table as you can just
check the layertable.Has() method. See

the tags use here to post so we can read you
code...

size=2><code>
[code]
{code}

      using (Transaction tr =


db.TransactionManager.StartTransaction())

{
        LayerTable layerTable
=

(LayerTable)tr.GetObject(db.LayerTableId,
OpenMode.ForRead);
        //drawing may
have objects that use this
layer...
        if
((layerTable.Has(layername) &&


layerTable[layername] !=
db.Clayer))

{
          LayerTableRecord
ltr =

(LayerTableRecord)

tr.GetObject(layerTable["foo"],
OpenMode.ForRead);


          if (ltr !=
null)

{

ltr.UpgradeOpen();

ltr.Erase();

tr.Commit();

}

}

}
{code}
[/code]
</code>

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<proplantvr> wrote in message
href="news:6102599@discussion.autodesk.com">news:6102599@discussion.autodesk.com...
This
is a function i have used to delete all layers that i hv created using
function createLayer() ---> private void eraseLayers() { Database db
= HostApplicationServices.WorkingDatabase; Editor editor =
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
try { using (Transaction tran = db.TransactionManager.StartTransaction()) {
LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId,
OpenMode.ForWrite); SymbolTableEnumerator sysTabEnum =
layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) { ObjectId
objEntr = (ObjectId)sysTabEnum.Current; LayerTableRecord ltr =
(LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); } tran.Commit();
} } catch (System.Exception e) { editor.WriteMessage("Error in iterateLayers
:: " + e.Message); } }

Anonymous · ‎01-12-2009

I'm just curious, I notice you checked
for current layer but what if the layer is not empty, frozen or
locked?

Joe ...

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"Paul Richardson" <prichardson<lastpoint> wrote in message
href="news:6102699@discussion.autodesk.com">news:6102699@discussion.autodesk.com...

missed a 'foo'. change to match variable you
use for

layername...

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"Paul Richardson" <prichardson<lastpoint> wrote in message
href="news:6102696@discussion.autodesk.com">news:6102696@discussion.autodesk.com...

No need to enumerate the table as you can just
check the layertable.Has() method. See

the tags use here to post so we can read you
code...

size=2><code>
[code]
{code}

      using (Transaction tr =


db.TransactionManager.StartTransaction())

{
        LayerTable layerTable
=

(LayerTable)tr.GetObject(db.LayerTableId,
OpenMode.ForRead);
        //drawing
may have objects that use this
layer...
        if
((layerTable.Has(layername) &&


layerTable[layername] !=
db.Clayer))

{
          LayerTableRecord
ltr =

(LayerTableRecord)

tr.GetObject(layerTable["foo"],
OpenMode.ForRead);


          if (ltr !=
null)

{

ltr.UpgradeOpen();

ltr.Erase();

tr.Commit();

}

}

}
{code}
[/code]
</code>

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

<proplantvr> wrote in message
href="news:6102599@discussion.autodesk.com">news:6102599@discussion.autodesk.com...
This
is a function i have used to delete all layers that i hv created using
function createLayer() ---> private void eraseLayers() { Database
db = HostApplicationServices.WorkingDatabase; Editor editor =
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
try { using (Transaction tran = db.TransactionManager.StartTransaction())
{ LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId,
OpenMode.ForWrite); SymbolTableEnumerator sysTabEnum =
layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) {
ObjectId objEntr = (ObjectId)sysTabEnum.Current; LayerTableRecord ltr =
(LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); }
tran.Commit(); } } catch (System.Exception e) { editor.WriteMessage("Error
in iterateLayers :: " + e.Message); }
}

Anonymous · ‎01-12-2009

Locked or frozen won't matter... Obviously you
cannot delete a layer that entities are using.

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"Steve" <
href="mailto:NoWay@YouveGotToBeKidding.com">NoWay@YouveGotToBeKidding.com>
wrote in message
href="news:6102839@discussion.autodesk.com">news:6102839@discussion.autodesk.com...

I'm just curious, I notice you checked
for current layer but what if the layer is not empty, frozen or
locked?

Joe ...

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"Paul Richardson" <prichardson<lastpoint> wrote in message
href="news:6102699@discussion.autodesk.com">news:6102699@discussion.autodesk.com...

missed a 'foo'. change to match
variable you use for

layername...

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

"Paul Richardson" <prichardson<lastpoint> wrote in message

href="news:6102696@discussion.autodesk.com">news:6102696@discussion.autodesk.com...

No need to enumerate the table as you can
just check the layertable.Has() method. See

the tags use here to post so we can read you
code...

size=2><code>
[code]
{code}

      using (Transaction tr =


db.TransactionManager.StartTransaction())

{
        LayerTable layerTable
=

(LayerTable)tr.GetObject(db.LayerTableId,
OpenMode.ForRead);
        //drawing
may have objects that use this
layer...
        if
((layerTable.Has(layername) &&


layerTable[layername] !=
db.Clayer))

{

LayerTableRecord ltr
=

(LayerTableRecord)

tr.GetObject(layerTable["foo"],
OpenMode.ForRead);


          if (ltr !=
null)

{

ltr.UpgradeOpen();

ltr.Erase();

tr.Commit();

}

}

}
{code}
[/code]
</code>

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

<proplantvr> wrote in message
href="news:6102599@discussion.autodesk.com">news:6102599@discussion.autodesk.com...
This
is a function i have used to delete all layers that i hv created using
function createLayer() ---> private void eraseLayers() { Database
db = HostApplicationServices.WorkingDatabase; Editor editor =
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor;
try { using (Transaction tran =
db.TransactionManager.StartTransaction()) { LayerTable layerTable =
(LayerTable)tran.GetObject(db.LayerTableId, OpenMode.ForWrite);
SymbolTableEnumerator sysTabEnum = layerTable.GetEnumerator(); while
(sysTabEnum.MoveNext() == true) { ObjectId objEntr =
(ObjectId)sysTabEnum.Current; LayerTableRecord ltr =
(LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); }
tran.Commit(); } } catch (System.Exception e) {
editor.WriteMessage("Error in iterateLayers :: " + e.Message); }
}

Anonymous · ‎01-12-2009

Hey Thanks Paul, I got it.

Also i will take care of tag next time but how to use these tags.

I tried in following way but didnt work.

<code>

[code]

if(l == null)

ed.write("aaa");

[/code]

</code>

Anonymous · ‎01-13-2009

The tags don't seem to be working - the way I did
it anyway. I saw Tony do it in a post

recently - worked for him.

style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">

<proplantvr> wrote in message
href="news:6103230@discussion.autodesk.com">news:6103230@discussion.autodesk.com...
Hey
Thanks Paul, I got it.

Also i will take care of
tag next time but how to use these tags.

I tried in following way but
didnt work.

<code>

[code]

if(l ==
null)

ed.write("aaa");

[/code]

</code>

Anonymous · ‎01-13-2009

It looks like your're posting in HTML rather than plain text.

--

http://www.caddzone.com

AcadXTabs: MDI Document Tabs for AutoCAD 2009
Supporting AutoCAD 2000 through 2009
http://www.acadxtabs.com

Introducing AcadXTabs 2010:
http://www.caddzone.com/acadxtabs/AcadXTabs2010.htm

"Paul Richardson" wrote in message news:6102697@discussion.autodesk.com...
Actually this looks like crap in the webbrowser...
"Paul Richardson" wrote in message news:6102696@discussion.autodesk.com...
No need to enumerate the table as you can just check the layertable.Has() method. See
the tags use here to post so we can read you code...



  [code]

  {code}      

        using (Transaction tr = 

          db.TransactionManager.StartTransaction())

        {

          LayerTable layerTable =

            (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);

          //drawing may have objects that use this layer...

          if ((layerTable.Has(layername) && 

            layerTable[layername] != db.Clayer))

          {

            LayerTableRecord ltr =

              (LayerTableRecord)

              tr.GetObject(layerTable["foo"], OpenMode.ForRead);

            

            if (ltr != null)

            {

              ltr.UpgradeOpen();

              ltr.Erase();

              tr.Commit();

            }

          }

        }

  {code}

  [/code]

wrote in message news:6102599@discussion.autodesk.com...
This is a function i have used to delete all layers that i hv created using function createLayer() ---> private void eraseLayers() { Database db = HostApplicationServices.WorkingDatabase; Editor editor = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor; try { using (Transaction tran = db.TransactionManager.StartTransaction()) { LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId, OpenMode.ForWrite); SymbolTableEnumerator sysTabEnum = layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) { ObjectId objEntr = (ObjectId)sysTabEnum.Current; LayerTableRecord ltr = (LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite); editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); } tran.Commit(); } } catch (System.Exception e) { editor.WriteMessage("Error in iterateLayers :: " + e.Message); } }

Anonymous · ‎01-13-2009

Joe.... errrrrr I mean "Steve" (lol)...

Where did you get the idea that you can't purge a
frozen or locked layer?

--

http://www.caddzone.com

AcadXTabs: MDI Document Tabs for AutoCAD 2009
Supporting AutoCAD 2000 through 2009
http://www.acadxtabs.com

Introducing AcadXTabs 2010:
http://www.caddzone.com/acadxtabs/AcadXTabs2010.htm

"Steve" wrote in message news:6102839@discussion.autodesk.com...
I'm just curious, I notice you checked for current layer but what if the layer is not empty, frozen or locked?

Joe ...

"Paul Richardson" wrote in message news:6102699@discussion.autodesk.com...
missed a 'foo'. change to match variable you use for
layername...
"Paul Richardson" wrote in message news:6102696@discussion.autodesk.com...
No need to enumerate the table as you can just check the layertable.Has() method. See
the tags use here to post so we can read you code...



    [code]

    {code}      

          using (Transaction tr = 

            db.TransactionManager.StartTransaction())

          {

            LayerTable layerTable =

              (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);

            //drawing may have objects that use this layer...

            if ((layerTable.Has(layername) && 

              layerTable[layername] != db.Clayer))

            {

              LayerTableRecord ltr =

                (LayerTableRecord)

                tr.GetObject(layerTable["foo"], OpenMode.ForRead);

              

              if (ltr != null)

              {

                ltr.UpgradeOpen();

                ltr.Erase();

                tr.Commit();

              }

            }

          }

    {code}

    [/code]

wrote in message news:6102599@discussion.autodesk.com...
This is a function i have used to delete all layers that i hv created using function createLayer() ---> private void eraseLayers() { Database db = HostApplicationServices.WorkingDatabase; Editor editor = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor; try { using (Transaction tran = db.TransactionManager.StartTransaction()) { LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId, OpenMode.ForWrite); SymbolTableEnumerator sysTabEnum = layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) { ObjectId objEntr = (ObjectId)sysTabEnum.Current; LayerTableRecord ltr = (LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite); editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); } tran.Commit(); } } catch (System.Exception e) { editor.WriteMessage("Error in iterateLayers :: " + e.Message); } }

Anonymous · ‎01-13-2009

Yes I was - Thanks.
"Tony Tanzillo" wrote in message news:6103296@discussion.autodesk.com...
It looks like your're posting in HTML rather than plain text.

--

http://www.caddzone.com

AcadXTabs: MDI Document Tabs for AutoCAD 2009
Supporting AutoCAD 2000 through 2009
http://www.acadxtabs.com

Introducing AcadXTabs 2010:
http://www.caddzone.com/acadxtabs/AcadXTabs2010.htm

"Paul Richardson" wrote in message news:6102697@discussion.autodesk.com...
Actually this looks like crap in the webbrowser...
"Paul Richardson" wrote in message news:6102696@discussion.autodesk.com...
No need to enumerate the table as you can just check the layertable.Has() method. See
the tags use here to post so we can read you code...



  [code]

  {code}

        using (Transaction tr =

          db.TransactionManager.StartTransaction())

        {

          LayerTable layerTable =

            (LayerTable)tr.GetObject(db.LayerTableId, OpenMode.ForRead);

          //drawing may have objects that use this layer...

          if ((layerTable.Has(layername) &&

            layerTable[layername] != db.Clayer))

          {

            LayerTableRecord ltr =

              (LayerTableRecord)

              tr.GetObject(layerTable["foo"], OpenMode.ForRead);



            if (ltr != null)

            {

              ltr.UpgradeOpen();

              ltr.Erase();

              tr.Commit();

            }

          }

        }

  {code}

  [/code]

wrote in message news:6102599@discussion.autodesk.com...
This is a function i have used to delete all layers that i hv created using function createLayer() ---> private void
eraseLayers() { Database db = HostApplicationServices.WorkingDatabase; Editor editor =
Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument.Editor; try { using (Transaction tran =
db.TransactionManager.StartTransaction()) { LayerTable layerTable = (LayerTable)tran.GetObject(db.LayerTableId, OpenMode.ForWrite);
SymbolTableEnumerator sysTabEnum = layerTable.GetEnumerator(); while (sysTabEnum.MoveNext() == true) { ObjectId objEntr =
(ObjectId)sysTabEnum.Current; LayerTableRecord ltr = (LayerTableRecord)tran.GetObject(objEntr, OpenMode.ForWrite);
editor.WriteMessage(" Layer Name: "+ltr.Name); ltr.Erase(); } tran.Commit(); } } catch (System.Exception e) {
editor.WriteMessage("Error in iterateLayers :: " + e.Message); } }

Community

How to Delete Layer using C#.NET.

How to Delete Layer using C#.NET.

How to Delete Layer using C#.NET.