我有以下两个任务的示例。第一个完成时,第二个应该使用第一个结果。我在这个领域II新,如果有人指导我如何IT连锁将不胜感激:连锁继续与任务
public async Task<string> UploadFile(string containerName, IFormFile file)
{
//string blobPath = "";
var container = GetContainer(containerName);
var fileName = file.FileName;
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
using (var memoryStream = new MemoryStream())
{
// await file.CopyToAsync(memoryStream);
// await blob.UploadFromStreamAsync(memoryStream);
// upload only when the 'memoryStream' is ready
Task.Factory.StartNew(() => file.CopyToAsync(memoryStream))
.ContinueWith(m => blob.UploadFromStreamAsync(m.Result)); // ??
}
return blob.Uri.AbsoluteUri;
}
如果没有第二方案:
public string UploadFile(string containerName, IFormFile file)
{
var container = GetContainer(containerName);
var fileName = file.FileName;
CloudBlockBlob blob = container.GetBlockBlobReference(fileName);
using (var memoryStream = new MemoryStream())
{
file.CopyToAsync(memoryStream).Wait();
blob.UploadFromStreamAsync(memoryStream).Wait();
//Task.Factory.StartNew(() => file.CopyToAsync(memoryStream))
// .ContinueWith(m => blob.UploadFromStreamAsync(m.Result)); // ??
}
return blob.Uri.AbsoluteUri;
}
要小心你的memoryStream生命周期,它会在你的第一个任务完成之前处理。 – GhostTW