# ObjectTable.FindByLayer examples

Examples for [FindByLayer](https://developer.rhino3d.com/api/rhinocommon/type/rhino.docobjects.tables.objecttable/findbylayer.md) in Rhino.DocObjects.Tables.ObjectTable.

## C#

```cs
using Rhino.Commands;

partial class Examples
{
  public static Rhino.Commands.Result SelLayer(Rhino.RhinoDoc doc)
  {
    // Prompt for a layer name
    string layername = doc.Layers.CurrentLayer.Name;
    Result rc = Rhino.Input.RhinoGet.GetString("Name of layer to select objects", true, ref layername);
    if (rc != Rhino.Commands.Result.Success)
      return rc;

    // Get all of the objects on the layer. If layername is bogus, you will
    // just get an empty list back
    Rhino.DocObjects.RhinoObject[] rhobjs = doc.Objects.FindByLayer(layername);
    if (rhobjs == null || rhobjs.Length < 1)
      return Rhino.Commands.Result.Cancel;

    for (int i = 0; i < rhobjs.Length; i++)
      rhobjs[i].Select(true);
    doc.Views.Redraw();
    return Rhino.Commands.Result.Success;
  }
}
```

## Python

```py
import Rhino
import scriptcontext
import System.Guid, System.Drawing.Color

def SelLayer():
    # Prompt for a layer name
    layername = scriptcontext.doc.Layers.CurrentLayer.Name
    rc, layername = Rhino.Input.RhinoGet.GetString("Name of layer to select objects", True, layername)
    if rc!=Rhino.Commands.Result.Success: return rc
    
    # Get all of the objects on the layer. If layername is bogus, you will
    # just get an empty list back
    rhobjs = scriptcontext.doc.Objects.FindByLayer(layername)
    if not rhobjs: Rhino.Commands.Result.Cancel
    
    for obj in rhobjs: obj.Select(True)
    scriptcontext.doc.Views.Redraw()
    return Rhino.Commands.Result.Success

if __name__=="__main__":
    SelLayer()
```

## VB.NET

```vbnet
Partial Class Examples
  Public Shared Function SelLayer(ByVal doc As Rhino.RhinoDoc) As Rhino.Commands.Result
    Dim rc As Rhino.Commands.Result
    ' Prompt for a layer name
    Dim layername As String = doc.Layers.CurrentLayer.Name
    rc = Rhino.Input.RhinoGet.GetString("Name of layer to select objects", True, layername)
    If rc <> Rhino.Commands.Result.Success Then Return rc

    ' Get all of the objects on the layer. If layername is bogus, you will
    ' just get an empty list back
    Dim rhobjs As Rhino.DocObjects.RhinoObject() = doc.Objects.FindByLayer(layername)
    If rhobjs Is Nothing OrElse rhobjs.Length < 1 Then
      Return Rhino.Commands.Result.Cancel
    End If

    For i As Integer = 0 To rhobjs.Length - 1
      rhobjs(i).Select(True)
    Next
    doc.Views.Redraw()
    Return Rhino.Commands.Result.Success
  End Function
End Class
```