(C#) Shopify Update Inventory Level for a Product (Adjust available quantity)

Use the adjust endpoint with the location ID and inventory item ID to increase or decrease the available quantity for an inventory level:

For more information, see https://shopify.dev/tutorials/manage-product-inventory-with-admin-api#update-inventory-levels-for-a-product-variant

Chilkat .NET Downloads Chilkat .NET Framework Chilkat for .NET Core

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Chilkat.Http http = new Chilkat.Http();

http.Login = "SHOPIFY_PRIVATE_API_KEY";
http.Password = "SHOPIFY_PRIVATE_API_KEY";

// Also see: How to retrieve inventory levels

http.Accept = "application/json";

// The following JSON is sent in the request body:

// {
//   "location_id": 6884556842,
//   "inventory_item_id": 12250274365496,
//   "available_adjustment": 1
// }

// Use this online tool to generate the code from sample JSON: 
// Generate Code to Create JSON

Chilkat.JsonObject jsonRequestBody = new Chilkat.JsonObject();
jsonRequestBody.UpdateInt("location_id",6884556842);
jsonRequestBody.UpdateInt("inventory_item_id",12250274365496);
jsonRequestBody.UpdateInt("available_adjustment",1);

string url = "https://{shop}.myshopify.com/admin/api/2020-04/inventory_levels/adjust.json";

Chilkat.HttpResponse resp = http.PText("POST",url,jsonRequestBody.Emit(),"utf-8","application/json",false,false);
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("Response Status Code: " + Convert.ToString(resp.StatusCode));

Chilkat.JsonObject jsonResponse = new Chilkat.JsonObject();
jsonResponse.Load(resp.BodyStr);
jsonResponse.EmitCompact = false;
Debug.WriteLine(jsonResponse.Emit());

if (resp.StatusCode >= 300) {
    Debug.WriteLine("Failed.");

    return;
}

// Sample output...
// (See the parsing code below..)
// 
// Use the this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// {
//   "inventory_level": {
//     "inventory_item_id": 12250274365496,
//     "location_id": 6884556842,
//     "available": 9,
//     "updated_at": "2018-06-26T15:04:49-04:00",
// ...
//     "admin_graphql_api_id": "gid://shopify/InventoryLevel/6485147690?inventory_item_id=12250274365496"
// ...
//   }
// }
// 

int inventory_levelInventory_item_id = jsonResponse.IntOf("inventory_level.inventory_item_id");
int inventory_levelLocation_id = jsonResponse.IntOf("inventory_level.location_id");
int inventory_levelAvailable = jsonResponse.IntOf("inventory_level.available");
string inventory_levelUpdated_at = jsonResponse.StringOf("inventory_level.updated_at");
string inventory_levelAdmin_graphql_api_id = jsonResponse.StringOf("inventory_level.admin_graphql_api_id");