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
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"));
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);
}
