c# - 在通用 handler.ashx 中另存为提示 "image name"？

Question

当我使用 Handler.ashx 显示文件夹中的图像然后尝试通过右键单击它来保存图像时，它一直给我“保存类型”asp.net 通用处理程序选项和处理程序名称作为文件名..

Bitmap target = new Bitmap(width, height);
    using (Graphics graphics = Graphics.FromImage(target)) {
        graphics.CompositingQuality = CompositingQuality.HighSpeed;
        graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
        graphics.CompositingMode = CompositingMode.SourceCopy;
        graphics.DrawImage(photo, 0, 0, width, height);
        using (MemoryStream memoryStream = new MemoryStream()) {
            target.Save(memoryStream, ImageFormat.Png);
            OutputCacheResponse(context, File.GetLastWriteTime(photoPath));
            using (FileStream diskCacheStream = new FileStream(cachePath, FileMode.CreateNew))
            {
                memoryStream.WriteTo(diskCacheStream);
            }
            memoryStream.WriteTo(context.Response.OutputStream);
        }
    }

上面是处理程序和

ImageTiff.ImageUrl = "Handler.ashx?p=" + Parameter; 

这是背后的代码。

我需要用图片名称保存它而不是 handler.ashx

Answer 1

您应该在发送数据之前设置 ContentType 和 Content-Disposition HTTP header :

context.Response.ContentType = "image/png";
context.Response.Headers["Content-Disposition"] = "attachment; filename=yourfilename.png";