如何使用C#上传文件?我需要从对话框窗口上传文件。
using Microsoft.WindowsAzure.Storage;
using Microsoft.WindowsAzure.Storage.Auth;
using Microsoft.WindowsAzure.Storage.Blob;
// Retrieve storage account from connection string.
CloudStorageAccount storageAccount = CloudStorageAccount.Parse("StorageKey");
// Create the blob client.
CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient();
// Retrieve reference to a previously created container.
CloudBlobContainer container = blobClient.GetContainerReference("mycontainer");
// Retrieve reference to a blob named "myblob".
CloudBlockBlob blockBlob = container.GetBlockBlobReference("myblob");
// Create or overwrite the "myblob" blob with contents from a local file.
using (var fileStream = System.IO.File.OpenRead(@"path\myfile"))
{
blockBlob.UploadFromStream(fileStream);
}
请参阅here关于所需的SDK和参考资料
我认为这就是你需要的
我们可以使用BackgroundUploader类,然后我们需要提供StorageFile对象和一个Uri:Required Namespaces:
using System;
using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;
using Windows.Foundation;
using Windows.Foundation.Collections;
using Windows.Networking.BackgroundTransfer;
using Windows.Storage.Pickers;
using Windows.Storage;
过程如下:使用通过UI输入字段提供的字符串值定义Uri,并且当最终用户通过由UI提供的UI选择文件时,返回由StorageFile对象表示的上载所需文件。 PickSingleFileAsync操作
Uri uri = new Uri(serverAddressField.Text.Trim());
FileOpenPicker picker = new FileOpenPicker();
picker.FileTypeFilter.Add("*");
StorageFile file = await picker.PickSingleFileAsync();
然后:
BackgroundUploader uploader = new BackgroundUploader();
uploader.SetRequestHeader("Filename", file.Name);
UploadOperation upload = uploader.CreateUpload(uri, file);
// Attach progress and completion handlers.
await HandleUploadAsync(upload, true);
就这样
这是完整的方法。
[HttpPost]
public ActionResult Index(Doctor doct, HttpPostedFileBase photo)
{
try
{
if (photo != null && photo.ContentLength > 0)
{
// extract only the fielname
var fileName = Path.GetFileName(photo.FileName);
doct.Image = fileName.ToString();
CloudStorageAccount cloudStorageAccount = DoctorController.GetConnectionString();
CloudBlobClient cloudBlobClient = cloudStorageAccount.CreateCloudBlobClient();
CloudBlobContainer cloudBlobContainer = cloudBlobClient.GetContainerReference("images");
string imageName = Guid.NewGuid().ToString() + "-" +Path.GetExtension(photo.FileName);
CloudBlockBlob BlockBlob = cloudBlobContainer.GetBlockBlobReference(imageName);
BlockBlob.Properties.ContentType = photo.ContentType;
BlockBlob.UploadFromStreamAsync(photo.InputStream);
string imageFullPath = BlockBlob.Uri.ToString();
var memoryStream = new MemoryStream();
photo.InputStream.CopyTo(memoryStream);
memoryStream.ToArray();
memoryStream.Seek(0, SeekOrigin.Begin);
using (var fs = photo.InputStream)
{
BlockBlob.UploadFromStreamAsync(memoryStream);
}
}
}
catch (Exception ex)
{
}
return View();
}
其中getconnectionstring方法就是这样。
static string accountname = ConfigurationManager.AppSettings["accountName"];
static string key = ConfigurationManager.AppSettings["key"];
public static CloudStorageAccount GetConnectionString()
{
string connectionString = string.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}", accountname, key);
return CloudStorageAccount.Parse(connectionString);
}