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I have an WEB API which have CRUD operation. For testing I have created a Console application. Create and GET all details are working fine. Now i want to get the product by using id field. Below is my code 

static HttpClient client = new HttpClient();
static void ShowProduct(Product product)
    {

        Console.WriteLine($"Name: {product.Name}\tPrice: {product.Price}\tCategory: {product.Category}", "\n");
    }
static async Task<Product> GetProductAsyncById(string path, string id)
    {
        Product product = null;
        HttpResponseMessage response = await client.GetAsync(path,id);
        if (response.IsSuccessStatusCode)
        {
            product = await response.Content.ReadAsAsync<Product>();
        }
        return product;
    }
case 3:

                    Console.WriteLine("Please enter the Product ID: ");
                    id = Convert.ToString(Console.ReadLine());

                    // Get the product by id
                    var pr = await GetProductAsyncById("api/product/", id);
                    ShowProduct(pr);

                    break;

At client.GetAsync(path,id) the id is giving me error cannot convert string to system.net.http.httpcompletionoption. For this I have checked all the articles related to it. But still unable to find the correct solution.

Any help would be highly appreciated

Moeez
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  • I have found couple of solutions [here](https://stackoverflow.com/questions/14520762/system-net-http-httpcontent-does-not-contain-a-definition-for-readasasync-an). Please try it out. – Vijayanath Viswanathan Sep 23 '17 at 08:41

1 Answers1

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You get this error because there is no method GetAsync() that accepts second argument as string.

Also, doing GET request you should pass id in url, i.e. if your api url is something like this: http://domain:port/api/Products, then your request url should be http://domain:port/api/Products/id where id is the id of product you want to get.

Change you call to GetAsync() by:

HttpResponseMessage response = await client.GetAsync(path + "/" +id);

or if C# 6 or higher:

HttpResponseMessage response = await client.GetAsync(path + $"/{id}");
Roman
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