asp.net显示来自字节数组的图像

Question

我有一个字节数组,并试图从中显示图像.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.Linq;

namespace RealPortableTerminal
{
public partial class resim : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        PortableTerminalDbEntities entity = new PortableTerminalDbEntities();
        byte[] arr = (from b in entity.Sicil where b.Id == 31 select b.Fotograf).First();

        Image rImage = null;
        using (MemoryStream ms = new MemoryStream(arr))
        {
            rImage = Image.FromStream(ms);
        }
    }
}
}

它强调FromStream并说'System.Web.UI.WebControls.Image'不包含'FromStream'的定义.似乎添加System.Data.Linq引用没有改变任何东西.我错过了什么吗？顺便说一下,我很确定我正确地从数据库中获取字节数组.

Answer 1

另一种方法是将您的字节数组转换为基本的64字符串并将其分配给ImageUrl属性rImage,如下所示:

rImage.ImageUrl = "data:image;base64," + Convert.ToBase64String(arr);

您不需要中间MemoryStream页面或单独的页面...如果字节数组是浏览器支持的图像格式,它将显示.祝好运.

Answer 2

<img id="img" runat="server" alt=""/>

在代码背后

string base64String = Convert.ToBase64String(arr, 0, arr.Length);
img.Src = "data:image/jpg;base64," + base64String;

你不需要MemoryStream.