asp.net – 将MemoryStream文件存储到Azure Blob

我有一个通过System.Drawing动态生成的图像.然后我将生成的图像输出到MemoryStream以存储到我的Azure blob中.

但我似乎无法将我的文件存储在我选择的blob中.没有错误发生,我的图像成功保存到MemoryStream.正如所料,我的blob是空的.

我确保我的blob容器具有公共读/写访问权限.

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);
}

任何帮助,将不胜感激.

更新

我设法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("CMSAzureSharedKey").ToString()));

至

CloudStorageAccount storageAccount = CloudStorageAccount.Parse(RoleEnvironment.GetConfigurationSettingValue("DiagnosticsConnectionString"));

但我会将“Gaurav Mantri”的回应标记为正确.如果不是他的见解,我的图像将不会上传到blob.

解决方法

尝试将内存流的位置设置为0,看看是否有帮助.类似下面的代码：

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);
}