我有一些图像(主要是png和jpg),我存储在SQL Server 2008的FileStream中。我能够检索所述图像并将它们存储在MemoryStream中。
我有一个网页,我需要在MemoryStream中显示图像。我是否可以通过某种方式在HTML图像标记内显示MemoryStream的内容(甚至更好,在ASP.NET图像控件中)?
答案 0 :(得分:10)
HTML
<img src="loadimage.ashx?id=..."/>
为项目和loadimage添加通用处理程序 处理
class loadimage: ihttphandler
{
public void Process(HttpContext context)
{
var id = context.Request["id"];
var row = GetImageFromDb(id);
var response = context.Response;
response.AddHeader("content-disposition", "attachment; filename=" + row["anem of image"]);
response.ContentType = row["mime type"].ToString(); //png or gif etc.
response.BinaryWrite((byte[])row["image blob"]);
}
public bool Reuse { get {return true; } }
}
答案 1 :(得分:1)
我使用以下代码从远程URL获取图像 - MemoryStream - System.Drawing.Image
// Set image url
string imgURL = ("http://cdn.flikr.com/images/products/" + imageName);
// Get image into memory
WebClient lWebClient = new WebClient();
byte[] lImageBytes = lWebClient.DownloadData(imgURL);
MemoryStream imgStream = new MemoryStream(lImageBytes);
image = System.Drawing.Image.FromStream(imgStream);
if (image.Width >= 200)
{
// do something
}