Convert array to string variable in Logic App - azure-logic-apps

Question

What's the quickest way to convert an array to a string variable (whilst keeping all the line breaks) using Logic App? Below is my definition which reads each array and append to a string variable, works fine but not the most efficient. The idea is that I can then create a BLOB from the final output without the ["..."]
{
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"actions": {
"For_each": {
"actions": {
"Append_to_string_variable": {
"inputs": {
"name": "Result String",
"value": "#concat(substring(items('For_each'), 0, sub(length(items('For_each')), 0)), '\r\n')"
},
"runAfter": {},
"type": "AppendToStringVariable"
}
},
"foreach": "#variables('CSV Content')",
"runAfter": {
"Initialize_Result_String": [
"Succeeded"
]
},
"runtimeConfiguration": {
"concurrency": {
"repetitions": 1
}
},
"type": "Foreach"
},
"Initialize_Result_String": {
"inputs": {
"variables": [
{
"name": "Result String",
"type": "string"
}
]
},
"runAfter": {
"Initialize_variable": [
"Succeeded"
]
},
"type": "InitializeVariable"
},
"Initialize_variable": {
"inputs": {
"variables": [
{
"name": "CSV Content",
"type": "array",
"value": [
"Header1,Header2",
"Data1,Data2",
"Data3,Data4"
]
}
]
},
"runAfter": {},
"type": "InitializeVariable"
},
"Initialize_variable_2": {
"inputs": {
"variables": [
{
"name": "Final Result",
"type": "string",
"value": "#variables('Result String')"
}
]
},
"runAfter": {
"For_each": [
"Succeeded"
]
},
"type": "InitializeVariable"
}
},
"contentVersion": "1.0.0.0",
"outputs": {},
"parameters": {},
"triggers": {
"manual": {
"inputs": {},
"kind": "Http",
"type": "Request"
}
}
},
"parameters": {}
}
Basically I'm looking for a way to convert the array
[
"Header1,Header2",
"Data1,Data2",
"Data3,Data4"
]
to a string
Header1,Header2
Data1,Data2
Data3,Data4

Answer 1

One of the workarounds is to use the Join Connector which takes joins each item in the array. Here is the screenshot of my logic app
RESULT:-
In Storage account:-
Below is the codeview of my logic app
{
"definition": {
"$schema": "https://schema.management.azure.com/providers/Microsoft.Logic/schemas/2016-06-01/workflowdefinition.json#",
"actions": {
"Create_blob_(V2)": {
"inputs": {
"body": "#body('Join')",
"headers": {
"ReadFileMetadataFromServer": true
},
"host": {
"connection": {
"name": "#parameters('$connections')['azureblob']['connectionId']"
}
},
"method": "post",
"path": "/v2/datasets/#{encodeURIComponent(encodeURIComponent('AccountNameFromSettings'))}/files",
"queries": {
"folderPath": "/container1",
"name": "sample1",
"queryParametersSingleEncoded": true
}
},
"runAfter": {
"Join": [
"Succeeded"
]
},
"runtimeConfiguration": {
"contentTransfer": {
"transferMode": "Chunked"
}
},
"type": "ApiConnection"
},
"Initialize_variable": {
"inputs": {
"variables": [
{
"name": "CSV Content",
"type": "array",
"value": [
"Header1,Header2",
"Data1,Data2",
"Data3,Data4"
]
}
]
},
"runAfter": {},
"type": "InitializeVariable"
},
"Join": {
"inputs": {
"from": "#variables('CSV Content')",
"joinWith": "\n"
},
"runAfter": {
"Initialize_variable": [
"Succeeded"
]
},
"type": "Join"
}
},
"contentVersion": "1.0.0.0",
"outputs": {},
"parameters": {
"$connections": {
"defaultValue": {},
"type": "Object"
}
},
"triggers": {
"manual": {
"inputs": {},
"kind": "Http",
"type": "Request"
}
}
},
"parameters": {
"$connections": {
"value": {
"azureblob": {
"connectionId": "/subscriptions/<Your_Subscription_Id>/resourceGroups/<Your_ResourceGroup>/providers/Microsoft.Web/connections/azureblob",
"connectionName": "azureblob",
"id": "/subscriptions/<Your_Subscription_Id>/providers/Microsoft.Web/locations/northcentralus/managedApis/azureblob"
}
}
}
}
}