Asp.net
將 MemoryStream 文件儲存到 Azure Blob
我有一個通過 System.Drawing 動態生成的圖像。然後我將生成的圖像輸出到一個
MemoryStream用於儲存到我的 Azure blob 中。但我似乎無法將我的文件儲存在我選擇的 blob 中。沒有發生錯誤,我的圖像已成功保存到
MemoryStream. 正如預期的那樣,我的 blob 是空的。我已確保我的 blob 容器具有公共讀/寫訪問權限。
程式碼
// Retrieve storage account from connection string. CloudStorageAccount storageAccount = CloudStorageAccount.Parse(String.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}", Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.GetConfigurationSettingValue("CMSAzureAccountName").ToString(), Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.GetConfigurationSettingValue("CMSAzureSharedKey").ToString())); // Create the blob client. CloudBlobClient blobClient = storageAccount.CreateCloudBlobClient(); // Retrieve reference to a previously created container. CloudBlobContainer container = blobClient.GetContainerReference("myimagecontainer"); // Retrieve reference to a blob named "myblob". CloudBlockBlob blockBlob = container.GetBlockBlobReference("test.jpg"); //Output image ImageCodecInfo[] Info = System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders(); EncoderParameters Params = new System.Drawing.Imaging.EncoderParameters(1); Params.Param[0] = new EncoderParameter(Encoder.Quality, 100L); System.IO.MemoryStream msImage = new System.IO.MemoryStream(); GenerateImage.Render(imageOutput).Save(msImage, Info[1], Params); //GenerateImage.Render() method creates a custom image and returns a Bitmap // Create or overwrite the "myblob" blob with contents from a local file. using (var fileStream = msImage) { blockBlob.UploadFromStream(fileStream); }任何幫助,將不勝感激。
更新
我設法找到了錯誤的主要原因。我需要更改以下內容:
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(String.Format("DefaultEndpointsProtocol=https;AccountName={0};AccountKey={1}", Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.GetConfigurationSettingValue("CMSAzureAccountName").ToString(), Microsoft.WindowsAzure.ServiceRuntime.RoleEnvironment.GetConfigurationSettingValue("CMSAzureSharedKey").ToString()));到
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(RoleEnvironment.GetConfigurationSettingValue("DiagnosticsConnectionString"));但我會將“Gaurav Mantri”回复標記為正確。如果不是他的洞察力,我的圖像不會上傳到 blob。
嘗試將記憶體流的位置設置為 0,看看是否有幫助。類似於下面的程式碼:
msImage.Position = 0;//Move the pointer to the start of stream. // Create or overwrite the "myblob" blob with contents from a local file. using (var fileStream = msImage) { blockBlob.UploadFromStream(fileStream); }
我有同樣的問題,程式碼有效,但 pdf 文件大小始終為 0,我必須使 MyMemoryStream.Position = 0; 下面是我使用的程式碼。希望它可以幫助某人。
using (pdfStream) { pdfStream.Position = 0; blob.UploadFromStream(pdfStream); _model.ConvertedPdfUrl = blob.Uri.AbsoluteUri; }