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我在使用Magick.NET时遇到了一些问题。 我想将我从URL下载的图像转换为内存流，然后我试图将图像转换为png。 我的代码执行时没有任何错误，并且创建（并上传）了一个文件，但由于某种原因该文件为0kb，并且无法读取。Magick.Net将ai转换成png
我的类看起来是这样的：
/// <summary>
/// Used to help with image control
/// </summary>
public class ImageProvider
{
// Private property for the azure container
private readonly CloudBlobContainer container;
/// <summary>
/// Default constructor
/// </summary>
public ImageProvider()
{
// Get our absolute path to our ghostscript files
var path = HostingEnvironment.MapPath("~/App_Data/Ghostscript");
// Set our ghostscript directory
MagickNET.SetGhostscriptDirectory(path);
// Assign our container to our controller
var storageAccount = CloudStorageAccount.Parse(ConfigurationManager.ConnectionStrings["AzureStorage"].ConnectionString);
var blocClient = storageAccount.CreateCloudBlobClient();
this.container = blocClient.GetContainerReference("kudos-sports");
// Create the container if it doesn't already exist
container.CreateIfNotExists();
// Give public access to the blobs
container.SetPermissions(new BlobContainerPermissions
{
PublicAccess = BlobContainerPublicAccessType.Blob
});
}
/// <summary>
/// Uploads an image to the azure storage container
/// </summary>
/// <param name="provider">The multipart memorystream provider</param>
/// <returns></returns>
public async Task<string> UploadImageAsync(MultipartMemoryStreamProvider provider)
{
// Read our content
using (var content = provider.Contents.FirstOrDefault())
{
// If the content is empty, throw an error
if (content == null)
throw new Exception("The file was not found.");
// Create a new blob block to hold our image
var extension = this.GetFileExtension(content);
var blockBlob = container.GetBlockBlobReference(Guid.NewGuid().ToString() + extension);
// Upload to azure
var stream = await content.ReadAsStreamAsync();
await blockBlob.UploadFromStreamAsync(stream);
// Return the blobs url
return blockBlob.StorageUri.PrimaryUri.ToString();
}
}
public async Task<string> ConvertImage(string path)
{
// Create our web client
using (var client = new WebClient())
{
// Get our data as bytes
var data = client.DownloadData(path);
// Create our image
using (var image = new MagickImage(data))
{
// Create a new memory stream
using (var memoryStream = new MemoryStream())
{
// Set to a png
image.Format = MagickFormat.Png;
image.Write(memoryStream);
// Create a new blob block to hold our image
var blockBlob = container.GetBlockBlobReference(Guid.NewGuid().ToString() + ".png");
// Upload to azure
await blockBlob.UploadFromStreamAsync(memoryStream);
// Return the blobs url
return blockBlob.StorageUri.PrimaryUri.ToString();
}
}
}
}
/// <summary>
/// Deletes and image from the azure storage container
/// </summary>
/// <param name="name">The name of the file to delete</param>
public void DeleteImage(string name)
{
// Get our item
var blockBlob = container.GetBlockBlobReference(name);
// Delete the item
blockBlob.Delete();
}
/// <summary>
/// Gets the extension from a file
/// </summary>
/// <param name="content">The HttpContent of an uploaded file</param>
/// <returns></returns>
private string GetFileExtension(HttpContent content)
{
// Get our filename
var filename = content.Headers.ContentDisposition.FileName.Replace("\"", string.Empty);
// Split our filename
var parts = filename.Split('.');
// If we have any parts
if (parts.Length > 0)
{
// Get our last part
var extension = parts[parts.Length - 1];
// Return our extension
return "." + extension;
}
// If we don't have an extension, mark as png
return ".png";
}
}
这是转换方法，似乎有这个问题，但我想不出是什么问题。 有谁知道这个问题可能是什么？