如何使用 Object c# .NET Core 在 blob 存储 Azure 上创建 csv 文件？

Question

我正在尝试从对象创建 CSV 文件并将其上传到 blob 存储。我还希望该列与对象中的属性具有相同的名称。 (.NET Core 5.0/C#)

Answer 1

请使用以下代码：

    using Microsoft.WindowsAzure.Storage;
    using Microsoft.WindowsAzure.Storage.Blob;
    using System;
    using System.Collections.Generic;
    using System.IO;
    using System.Linq;
    using System.Threading.Tasks;

    namespace TestKeyVault.Services
    {

    public class Sample
    { 
        public string FirstName { get; set; }
        public int Id { get; set; }
        public string LastName { get; set; }

    }

    public class Demo
    {
        public async Task startAsync()
        {
            var Friends = new List<Sample> { 
                new Sample { FirstName="Naman",LastName="Sinha",Id = 1},
                new Sample {FirstName="Naman",LastName="Sinha",Id = 2},  
                new Sample {FirstName = "Naman", LastName = "Sinha", Id = 3}
            };

            string properties = string.Join(",", Friends[0].GetType().GetProperties().Select(i => i.Name));

            var info = from member in Friends
                       let record = string.Join(",", member.GetType().GetProperties().Select(j => j.GetValue(member)))
                       select record;

            var csv = new List<string>
            {
                properties
            };

            csv.AddRange(info);

            string newPath = Directory.GetCurrentDirectory() + "/Data";

            // Determine whether the directory exists.  
            if (Directory.Exists(newPath))
                Directory.Delete(newPath, true);

            Directory.CreateDirectory(newPath);

            File.WriteAllLines(newPath + "/FileToBeUploaded.csv", csv);

            try
            {

                CloudStorageAccount account = CloudStorageAccount.Parse("YOUR_STORAGE_ACCOUNT_CONNECTION_STRING");

                CloudBlobClient client = account.CreateCloudBlobClient();

                CloudBlobContainer container = client.GetContainerReference("YOUR_CONTAINER_NAME");

                await container.CreateIfNotExistsAsync();

                CloudBlockBlob blob = container.GetBlockBlobReference("FileToBeUploaded.csv");

                await blob.UploadFromFileAsync(newPath);

                Console.WriteLine("File Uploaded!");

            }
            catch (Exception ex)
            {
                Console.WriteLine("File could not be downloaded due to: "+ex.Message);
            }

        }
    }

}

代码从示例对象创建一个 CSV 文件并从中生成一个 .csv 文件，然后将其作为 blob 上传到指定存储帐户的容器中。 您只需要更改类和命名空间，并指定 Azure 存储帐户的连接字符串和容器名称。