How Can I Efficiently Convert a Complex JSON Response into Custom DTOs in C# ASP.NET?

C# ASP.NET: Streamlining Complex JSON to Custom DTO Conversion

Working with external APIs often involves navigating complex JSON responses. This article demonstrates a straightforward method to convert a challenging JSON structure into custom Data Transfer Objects (DTOs) within a C# ASP.NET environment. The challenge lies in extracting a list of Leads as custom DTOs from a rigid and unpredictable JSON response.

Leveraging Visual Studio's JSON to Classes Functionality

Visual Studio offers a built-in solution for simplifying this process. Follow these steps to generate C# classes directly from your JSON data:

1. Copy the JSON response data.
2. In Visual Studio, go to Edit > Paste Special > Paste JSON as Classes.
3. Visual Studio will automatically create C# classes that mirror the JSON's structure.

Creating and Customizing Your Lead DTO

After generating the classes, refine them to create your desired LeadDto class. For example:

<code class="language-csharp">public class LeadDto
{
    public string LeadId { get; set; }
    public string Company { get; set; }
}</code>

Parsing the JSON and Populating the Lead List

Now, parse the JSON response and populate your List<LeadDto>:

<code class="language-csharp">// Assuming 'response' is your deserialized JSON response object
var leads = new List<LeadDto>();
foreach (var row in response.result.Leads.row)
{
    var lead = new LeadDto { LeadId = row.FL[0].content, Company = row.FL[1].content };
    leads.Add(lead);
}</code>

This approach ensures your data is extracted into the specified DTO format, making subsequent data processing significantly easier.

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