Question 86248 in ASP.NET Question posted in
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Add double quotations in List to send API request in JSON – Asp.net

I want to add double quotation in list of each string item so that I can make a JSON request to send to api.
var response = default(HttpResponseMessage);
using var httpClient = CreateHttpClientForRequest();

        var kpis = string.Join<string>(",", (IEnumerable<string>)keyProcessInstance);
       
        using var requestMessage = new HttpRequestMessage(HttpMethod.Delete, PathfinderDeleteActiveUri)
        {             
            Content = new StringContent ($@"[""{kpis}""]", Encoding.UTF8, "application/json")            
        };

I need this type of format in kpis variable.
["string1","string2","string"]

but not able to add "" for each string in the kpis.

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2

Answers


  1. 0

    You should use System.Text.Json.JsonSerializer to serialize your list to JSON.

    using System.Text.Json;

...

string kpis = JsonSerializer.Serialize(keyProcessInstance);
       
using var requestMessage = new HttpRequestMessage(HttpMethod.Delete, PathfinderDeleteActiveUri)
{             
    Content = new StringContent(kpis, Encoding.UTF8, "application/json")            
};

    For educational purposes only, this is what you could do to make it work with your own approach.

    var kpis = string.Join<string>("","", (IEnumerable<string>)keyProcessInstance);
       
using var requestMessage = new HttpRequestMessage(HttpMethod.Delete, PathfinderDeleteActiveUri)
{             
    Content = new StringContent($"["{kpis}"]", Encoding.UTF8, "application/json")            
};

    You have to use backslash to use quotes in a string ".

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  2. 0

    You don’t need to quote array values, the JSON serializer will do it automatically. In .NET 5 and later you can use JsonContent.Create to create a JsonContent object that serializes its payload automatically:

    var jsonContent=JsonContent.Create(keyProcessInstance);
using var requestMessage = new HttpRequestMessage(HttpMethod.Delete, uri)
        {             
            Content = jsonContent           
        };
await client.SendAsync(requestMessage);

    The default media type for JsonContent is application/json with CharSet utf-8

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