topic Re: Add a multi Layer files to mxd using python in Python Questions

Add a multi Layer files to mxd using python

Yaron_YosefCohen — Mon, 19 Jan 2015 09:57:59 GMT

Hello

I have more than 300 layer files located in many sub-Folders and sub-sub-Folders. All Sub Folders are located in one large directory.I read http://gis.stackexchange.com/questions/35693/use-python-to-add-layers-to-toc?rq=1

and I try, with arcpy, to detect all the layers and add them to mxd.

Is it possible?

Re: Add a multi Layer files to mxd using python

KishorGhatage — Mon, 19 Jan 2015 11:36:16 GMT

I believe it is possible.

Search the layer using .lyr extension in the directory and then use Add layer to add the searched lyr in MXD.

Add layer

http://resources.arcgis.com/en/help/main/10.2/index.html#//00s300000025000000

import arcpy, os

folderPath = r"C:\Project"

for filename in os.listdir(folderPath):

fullpath = os.path.join(folderPath, filename)

if os.path.isfile(fullpath):

basename, extension = os.path.splitext(fullpath)

if extension.lower() == ".mxd":

# Use Add layer here

mxd.save()

del mxd

In the above code .mxd files are searched. Using the same code you can search your .lyr and add then in the desired mxd.

I am not python expert. Hope this information is helpful.

Re: Add a multi Layer files to mxd using python

XanderBakker — Sat, 11 Dec 2021 19:03:25 GMT

Hi,

First of all you should really use syntax highlighting: Posting Code blocks in the new GeoNet

To recursively loop through folder and sub folder and detect the layerfiles (.lyr) you can use the arcpy.da.Walk functionality (asuming you have a recent version of ArcGIS).

import arcpy
import os

workspace = r"D:\Xander\GeoNet"

walk = arcpy.da.Walk(workspace, datatype="Layer")
for dirpath, dirnames, filenames in walk:
    for filename in filenames:
        print (os.path.join(dirpath, filename))

This prints each .lyr file it finds:

D:\Xander\GeoNet\StackedLabels\aLayer.lyr

D:\Xander\GeoNet\StackedLabels\subfolder\subsubfolder\subsubsubfolder\AnotherLayer.lyr

In case you want to add all the layer found to an existing MXD you should open the MXD before the loop and add put the add layerfile logic inside the loop. Adding a lot of layer to an MXD will probably make it very slow.

Your code might look like this (in case you run this inside a session of ArcMap and want to add the layers to the current session of ArcMap, hence the keyword "CURRENT"):

import arcpy
import os

# suppose you want to add it to the current MXD (open MXD)
mxd = arcpy.mapping.MapDocument("CURRENT")
dataFrame = arcpy.mapping.ListDataFrames(mxd, "*")[0]

# base folder
workspace = r"D:\Xander\GeoNet"
walk = arcpy.da.Walk(workspace, datatype="Layer")

for dirpath, dirnames, filenames in walk:
    for filename in filenames:
        layerfile = os.path.join(dirpath, filename)
        addlayer = arcpy.mapping.Layer(layerfile)
        arcpy.mapping.AddLayer(dataFrame, addlayer, "BOTTOM")

arcpy.RefreshTOC()
arcpy.RefreshActiveView()
del addlayer, mxd

In case you want to run it as a standalone script and/or add the layers to a different existing MXD, you should replace the keyword "CURRENT" on line 5 by a reference (string containing path and filename) to the MXD.

Re: Add a multi Layer files to mxd using python

KishorGhatage — Mon, 19 Jan 2015 12:41:54 GMT

Thanks Xander. It's very helpful.

Re: Add a multi Layer files to mxd using python

Yaron_YosefCohen — Tue, 20 Jan 2015 08:45:33 GMT

Hello

I cant find the >> sign so the code will marked...

i run this code and nothing happend. the first code is working

what to do now?

import arcpy

import os

# suppose you want to add it to the current MXD (open MXD)

mxd = arcpy.mapping.MapDocument(r"C:\Project\Project.mxd")

dataFrame = arcpy.mapping.ListDataFrames(mxd, "*")[0]

# base folder

workspace = r"C:\Project\layers"

walk = arcpy.da.Walk(workspace, datatype="Layer")

for dirpath, dirnames, filenames in walk:

for filename in filenames:

layerfile = os.path.join(dirpath, filename)

addlayer = arcpy.mapping.Layer(layerfile)

arcpy.mapping.AddLayer(dataFrame, addlayer, "BOTTOM")

arcpy.RefreshTOC()

arcpy.RefreshActiveView()

del addlayer, mxd

Re: Add a multi Layer files to mxd using python

KishorGhatage — Sat, 11 Dec 2021 19:03:27 GMT

Just added save statement

import arcpy
import os

# suppose you want to add it to the current MXD (open MXD)
mxd = arcpy.mapping.MapDocument(r"C:\Project\Project.mxd")
dataFrame = arcpy.mapping.ListDataFrames(mxd, "*")[0]

# base folder
workspace = r"C:\Project\layers"
walk = arcpy.da.Walk(workspace, datatype="Layer")

for dirpath, dirnames, filenames in walk:
    for filename in filenames:
        layerfile = os.path.join(dirpath, filename)
        addlayer = arcpy.mapping.Layer(layerfile)
        arcpy.mapping.AddLayer(dataFrame, addlayer, "BOTTOM")
        mxd.save()

arcpy.RefreshTOC()
arcpy.RefreshActiveView()
del addlayer, mxd

Re: Add a multi Layer files to mxd using python

Yaron_YosefCohen — Tue, 20 Jan 2015 12:32:54 GMT

the code added just 2 lyr.file in the workspace. it didn't added the lyr in the sub folders