Convert CSV to JSON or JSON to CSV Programmatically in C#

Convert_JSON_File_to_CSV_File_in_CSharp.md

You can convert CSV to JSON online or JSON to CSV large file programmatically on the cloud. In this article, you will learn how to convert CSV to JSON or JSON to CSV Programmatically in C#.

The following topics are covered in this article:

1. JSON to CSV and CSV to JSON Conversion API and C# SDK
2. How to Convert CSV to JSON in C# using REST API
3. Convert Large JSON to CSV in C# using REST API

Convert_Large_CSV_to_JSON_or_JSON_to_Large_CSV_File_in_CSharp.cs

// How to Convert CSV to JSON in C# using REST API
using System;
using GroupDocs.Conversion.Cloud.Sdk.Api;
using GroupDocs.Conversion.Cloud.Sdk.Client;
using GroupDocs.Conversion.Cloud.Sdk.Model;
using GroupDocs.Conversion.Cloud.Sdk.Model.Requests;

namespace GroupDocs.Conversion.CSharp
{
  // Change CSV to JSON File Online
  class Convert_CSV_to_JSON
  {
    static void Main(string[] args)
    {
      try
      {
        // Create necessary API instances
        var apiInstance = new ConvertApi(configuration);
        // Prepare convert settings
        var settings = new ConvertSettings
        {
          FilePath = "csharp-testing/input-sample-file.csv",
          Format = "json",
          OutputPath = "csharp-testing/output-sample-file.json"
        };
        
        // Convert to specified format
        var response = apiInstance.ConvertDocument(new ConvertDocumentRequest(settings));
        Console.WriteLine("Successfully converted CSV to JSON format online in C#: " + response[0].Url);
      }
      catch (Exception e)
      {
        Console.WriteLine("Exception when calling GroupDocs ConvertApi: " + e.Message);
      }
    }
  }
}

Convert_Nested_JSON_to_CSV_Online_in_CSharp.cs

// How to Convert Large JSON to CSV in C# using REST API
using System;
using GroupDocs.Conversion.Cloud.Sdk.Api;
using GroupDocs.Conversion.Cloud.Sdk.Client;
using GroupDocs.Conversion.Cloud.Sdk.Model;
using GroupDocs.Conversion.Cloud.Sdk.Model.Requests;

namespace GroupDocs.Conversion.CSharp
{
  // Convert From JSON to CSV Online
  class Convert_JSON_to_CSV
  {
    static void Main(string[] args)
    {
      try
      {
        // Create necessary API instances
        var apiInstance = new ConvertApi(configuration);
        // Prepare convert settings
        var settings = new ConvertSettings
        {
          FilePath = "csharp-testing/input-sample-file.json",
          Format = "csv",
          OutputPath = "csharp-testing/output-sample-file.csv"
        };
        
        // Convert to specified format
        var response = apiInstance.ConvertDocument(new ConvertDocumentRequest(settings));
        Console.WriteLine("Successfully converted JSON file to CSV file online in C#: " + response[0].Url);
      }
      catch (Exception e)
      {
        Console.WriteLine("Exception when calling GroupDocs ConvertApi: " + e.Message);
      }
    }
  }
}

Download_Convert_CSV_file_to_JSON_format_in_CSharp.cs

// How to Download converted JSON file in C#
using System;
using GroupDocs.Conversion.Cloud.Sdk.Api;
using GroupDocs.Conversion.Cloud.Sdk.Client;
using GroupDocs.Conversion.Cloud.Sdk.Model.Requests;

namespace GroupDocs.Conversion.CSharp
{
  // Download Output File
  class Download_File
  {
    static void Main(string[] args)
    {
      try
      {
        // initialize api
        var fileApi = new FileApi(configuration);
        // create download file request
        var downloadRequest = new DownloadFileRequest("csharp-testing/output-sample-file.json", myStorage);
        // download file
        Stream downloadResponse = fileApi.DownloadFile(downloadRequest);

        // save file in working directory
        using (var fileStream = System.IO.File.Create("H:\\groupdocs-cloud-data\\output-sample-file.json"))
        {
          downloadResponse.Seek(0, SeekOrigin.Begin);
          downloadResponse.CopyTo(fileStream);
        }
      }
      catch (Exception e)
      {
        Console.WriteLine("Exception when calling GroupDocs FileApi: " + e.Message);
      }

    }
  }
}

Upload_to_Import_CSV_to_JSON_or_JSON_to_CSV_in_CSharp.cs

using System;
using GroupDocs.Conversion.Cloud.Sdk.Api;
using GroupDocs.Conversion.Cloud.Sdk.Client;
using GroupDocs.Conversion.Cloud.Sdk.Model.Requests;
using System.IO;

namespace GroupDocs.Conversion.CSharp
{
  // Upload Sample File
  class Upload_File
  {
    static void Main(string[] args)
    {
      try
      {
        // initialize api
        var fileApi = new FileApi(configuration);

        // open file
        var fileStream = File.Open(@"H:\groupdocs-cloud-data\input-sample-file.csv", FileMode.Open);

        // create file upload request
        var request = new UploadFileRequest("csharp-testing/input-sample-file.csv", fileStream, myStorage);

        // upload file
        var response = fileApi.UploadFile(request);
        Console.WriteLine("CSV File Upload Process Completed: " + response.Uploaded.Count.ToString());
        fileStream.Close();
      }
      catch (Exception e)
      {
        Console.WriteLine("Exception when calling GroupDocs FileApi: " + e.Message);
      }
    }
  }
}

Utils_to_Convert_CSV_to_JSON_or_JSON_to_CSV_Online_in_CSharp.cs

//Get clientId & clientSecret from https://dashboard.groupdocs.cloud (free registration is required).
string clientId = "xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx";
string clientSecret = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
string myStorage = "test-internal-storage";

var configuration = new Configuration(clientId, clientSecret);
configuration.ApiBaseUrl = "https://api.groupdocs.cloud";