How to Upload Files into Azure Blob Storage with ASP.NET Core Web API

using Azure.Storage.Blobs;
using Azure.Storage.Blobs.Models;
using createwebapiusingmysql.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using MySql.Data.MySqlClient;
using System;
using System.Collections.Generic;
using System.Data;
using System.Linq;
using System.Threading.Tasks;

namespace createwebapiusingmysql.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class AssetUploadController : Controller
    {
        private readonly string _azureConnectionString;
        private readonly string _azureConnectionStringsastoken;
        private readonly IConfiguration _configuration;

        public AssetUploadController(IConfiguration configuration)
        {
            _azureConnectionString = configuration.GetConnectionString("AzureBlobStorage");
            _azureConnectionStringsastoken = configuration.GetConnectionString("SASToken");
            _configuration = configuration;
        }

        List<Products> _category = new List<Products>();

        [HttpPost("{id}")]
        public async Task<IActionResult> assetAsync(int id)
        {
            try
            {
                GetcategoryFriendlyame(id);
                string containersname = _category[0].categoryFriendlyame;
                var formCollection = await Request.ReadFormAsync();
                var file = formCollection.Files.First();

                if (file.Length > 0)
                {
                    var container = new BlobContainerClient(_azureConnectionString, containersname);
                    var createResponse = await container.CreateIfNotExistsAsync();

                    if (createResponse != null && createResponse.GetRawResponse().Status == 201)
                        await container.SetAccessPolicyAsync(Azure.Storage.Blobs.Models.PublicAccessType.Blob);

                    var blob = container.GetBlobClient(file.FileName);

                    await blob.DeleteIfExistsAsync((Azure.Storage.Blobs.Models.DeleteSnapshotsOption)Azure.Storage.Blobs.Models.DeleteSnapshotsOption.IncludeSnapshots);

                    using (var fileStream = file.OpenReadStream())
                    {
                        await blob.UploadAsync(fileStream, new BlobHttpHeaders { ContentType = file.ContentType });
                        blob.SetMetadata(new Dictionary<string, string>());

                        Dictionary<string, string> metadata = new Dictionary<string, string>(2);
                        metadata.Add("ProductId", id.ToString());
                        blob.SetMetadata(metadata);
                    }

                    if (blob.Uri.ToString() != null && blob.Uri.ToString() != "")
                    {
                        UpdateProductTable(id.ToString(), blob.Uri.ToString());
                    }

                    return Ok(blob.Uri.ToString());
                }

                return BadRequest();
            }
            catch (Exception ex)
            {
                return StatusCode(500, $"Internal server error: {ex}");
            }
        }

        // we are getting category name to create container in azure
        private List<Products> GetcategoryFriendlyame(int id)
        {
            var @ProductId = id;
            string query = @"select categoryFriendlyame, ProductId from restapi.categories, restapi.products where categories.categoryid = products.categoryid AND products.ProductId=" + @ProductId + ";";
            DataTable table = new DataTable();
            string sqlDataSource = _configuration.GetConnectionString("EmployeeAppcon");
            MySqlDataReader myReader;

            using (MySqlConnection mycon = new MySqlConnection(sqlDataSource))
            {
                mycon.Open();
                using (MySqlCommand mycommond = new MySqlCommand(query, mycon))
                {
                    myReader = mycommond.ExecuteReader();
                    table.Load(myReader);
                    myReader.Close();
                    mycon.Close();
                }

                for (int i = 0; i < table.Rows.Count; i++)
                {
                    Products prd = new Products();
                    prd.ProductId = Convert.ToInt32(table.Rows[i]["ProductId"]);
                    prd.categoryFriendlyame = table.Rows[i]["categoryFriendlyame"].ToString();
                    _category.Add(prd);
                }
                return (_category);
            }
        }

        // We are updating image and model url to field in product table
        private void UpdateProductTable(string v1, string v2)
        {
            string imageuri = v2;
            var splitVals = imageuri.Split('/');
            var URL4 = splitVals[3];
            var URL5 = splitVals[4];
            string subseturi = "https://ceeademocontent.azureedge.net";
            var sastoken = _azureConnectionStringsastoken;
            string finalurl = "" + subseturi + "/" + URL4 + "/" + URL5 + sastoken;
            string imagetype = URL5.Substring(URL5.Length - 4);
            string query;

            if (imagetype.ToString() == "gltf" || imagetype.ToString() == ".glb")
            {
                query = @"update restapi.Products set productModel = '{finalurl}' where productId = {v1}";
                query = query.Replace("{finalurl}", finalurl);
                query = query.Replace("{v1}", v1);
            }
            else
            {
                query = @"update restapi.Products set productPreview = '{finalurl}' where productId = {v1}";
                query = query.Replace("{finalurl}", finalurl);
                query = query.Replace("{v1}", v1);
            }

            DataTable table = new DataTable();
            string sqlDataSource = _configuration.GetConnectionString("EmployeeAppcon");
            MySqlDataReader myReader;

            using (MySqlConnection mycon = new MySqlConnection(sqlDataSource))
            {
                mycon.Open();
                using (MySqlCommand mycommond = new MySqlCommand(query, mycon))
                {
                    myReader = mycommond.ExecuteReader();
                    table.Load(myReader);
                    myReader.Close();
                    mycon.Close();
                }
            }
        }
    }
}

Finally, with Postman try to add the file to Azure blob storage as shown in the below screen.