我有一张通过 System.Drawing 动态生成的图片。然后,我将生成的图像输出到 MemoryStream 中,以便存储到 Azure blob 中。
但是我似乎无法将文件存储在我选择的 blob 中。没有发生错误,并且我的图像成功保存到 MemoryStream 中。但是,我的 blob 是空的,这是预料中的。
我已确保我的 blob 容器具有公共读/写访问权限。
代码
// 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);
}
欢迎提供帮助。
更新
我找到了错误的主要原因。我需要更改以下内容:
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()));
to
CloudStorageAccount storageAccount = CloudStorageAccount.Parse(RoleEnvironment.GetConfigurationSettingValue("DiagnosticsConnectionString"));
但是我将把"Gaurav Mantri"的回复标记为正确答案。如果不是他的洞见,我的图像就不会上传到Blob。