Read in a Json File in powershell, and get values out of it

Question

I try to extract data from a json file i imported into powershell, the import part works fine for me, i am also able to see my output, but i want to get only the date of the Categorie "v", i have no idea how to figure it out. i tried something like:

$vPSObject.v.getValue(0)

but this dont work for me.

by code looks like:

$file= Get-Content "C:\Users\xxxx\OneDrive\Desktop\test.json"   

#write-host $file

$file= $file -split '"d":'


$file2=$file 

$file=$file2 | ConvertFrom-Json



$vPSObject= $file2 | ConvertFrom-Json 



$vPSObject.v

$vPSObject.n

my output looks like:

t n        v                                                                                                                                                                                
- -        -                                                                                                                                                                                
d 000064s2 {10.05.2021, , , testfile (user)}                                                                                                           
d 00006deCE {06.11.2020, , , testfile2}                                                                                                              
d 00006dasdCA {06.11.2020, , , testfile3 (user2)}     

my output should look like:

000064s2 10.05.2021
00006deCE 06.11.2020                                                                                                            
00006dasdCA 06.11.2020    

so i could store it into a array to work with it later.

part of my json file:

{
      "t": "d",
      "n": "000061B6",
      "v": [
        "20.07.2016",
        "",
        "",
        "test"
      ]
    },

Answer 1

Assuming your json looks like this when converted to object[]:

t n           v                     
- -           -                     
d 000061B6    {10.05.2021, , , test}
d 00006deCE   {06.11.2020, , , test}
d 00006dasdCA {06.11.2020, , , test}

You can use a calculated property to get the result you want (this is assuming that the Date on the v property is always the position 0 of the array):

$json | Select-Object n, @{n='v';e={$_.v[0]}}

Output:

n           v         
-           -         
000061B6    10.05.2021
00006deCE   06.11.2020
00006dasdCA 06.11.2020

After converting this output to json:

[
    {
        "n":  "000061B6",
        "v":  "10.05.2021"
    },
    {
        "n":  "00006deCE",
        "v":  "06.11.2020"
    },
    {
        "n":  "00006dasdCA",
        "v":  "06.11.2020"
    }
]

---

$newJson = $json | Select-Object n, @{n='v';e={$_.v[0]}}

PS /> $newJson.n
000061B6
00006deCE
00006dasdCA

PS /> $newJson.v
10.05.2021
06.11.2020
06.11.2020

PS /> $newJson.v[0]
10.05.2021

Answer 2

Assuming you really want to create an array of strings each of which is composed of property values joined with a space, use the following:

(ConvertFrom-Json (Get-Content -Raw C:\Users\xxxx\OneDrive\Desktop\test.json)) | 
  ForEach-Object { '{0} {1}' -f $_.n, $_.v[0] }

You can prepend [array] $strings = to the command above in order to collect all resulting strings.

If, by contrast, you want to create objects with the properties of interest, see Santiago Squarzon's helpful answer.