Add Raster File to empty table of content in Arcmap Desktop

[TessaKhairaniErmanto]

Hello,

I am trying to add a raster file from my directory to my current mxd file, but with arcpy.mapping.AddLayer function seems only adding one band per file, is there a sign for me to add RGB composite automatically using arcpy? Thankyou for your help.

[DanPatterson]

Did you try 

Make Raster Layer (Data Management)—ArcMap | Documentation (arcgis.com) arcmap

Make Raster Layer (Data Management)—ArcGIS Pro | Documentation Pro

first?

[TessaKhairaniErmanto]

Thank you for your response Dan,

I did, but I am getting confused when making a layer file from table of content, because if I run it manually, the script will only adding 1 band instead of 3 composite band, so I need a trigger to make a layer.

Is it possible for me to making an automize script that will adding the raster layer of my directory file without any trigger? 

Here is my code :

import arcpy, os, glob, pythonaddins

import Tkinter as tk

import tkFileDialog as filedialog

mxd = arcpy.mapping.MapDocument("Current")

mxd.author = "Me"

mxd.save()

root=tk.Tk()

root.withdraw()    

folder_selected = filedialog.askdirectory()

root.destroy

# mxd = arcpy.mapping.MapDocument("Current")

df = arcpy.mapping.ListDataFrames(mxd)[0]

file_name=[]

for file in os.listdir(folder_selected😞

    if file.endswith(".tif"😞

        file_name.append(file)

# arcpy.mapping.AddLayer(df, arcpy.mapping.Layer(os.path.join(folder_selected,file_name[0])))

for lyr in arcpy.mapping.ListLayers(mxd😞

    lyr.saveACopy(file_name[0] + ".lyr")

source_layer = arcpy.mapping.Layer(os.path.join(folder_selected,(file_name[0] + ".lyr")))

count = 0

for file in os.listdir(folder_selected😞

    if file.endswith(".tif"😞

        name = file.split(".")[0]

        rasterPath = os.path.join(folder_selected,file)

        update_layer = arcpy.mapping.Layer(rasterPath)

        arcpy.mapping.UpdateLayer(df, update_layer, source_layer, True)

        arcpy.mapping.AddLayer(df,update_layer,"BOTTOM")

        count = count + 1

[DanPatterson]

I would go with makerasterlayer.  perhaps it behaves differently than mapping's AddLayer