把图片在数据库中读出来并显示在页面上

   这个前台没有代码，我是在后台用代码从数据库里把图片读出来显示在页面上的，

百度了半天，也没看懂网上的是什么意思，只好自己弄了，

效果出来之后需要自己设置图片的显示大小，要不然在界面上显示的乱七八糟的

namespace FriendWeb{    public partial class pic : System.Web.UI.Page    {        public System.Drawing.Image SetByteToImage(byte[] mybyte)         {            System.Drawing.Image image; MemoryStream mymemorystream = new MemoryStream(mybyte, 0, mybyte.Length);            image = System.Drawing.Image.FromStream(mymemorystream);             return image;        }       int i=0;        protected void Page_Load(object sender, EventArgs e)        {                    if (!Page.IsPostBack)            {                using (SqlConnection conn = new SqlConnection())                {                    conn.ConnectionString = "data source=QZC-PC;initial catalog=student;User Id=sa;password=123";                    string strSql = "select FIamge from boke";                    using (SqlCommand cmd = new SqlCommand(strSql, conn))                    {                        conn.Open();                                               using (SqlDataReader reader = cmd.ExecuteReader())                        {                            while (reader.Read())                            {                                i++;                                System.Drawing.Image img = SetByteToImage((Byte[])reader["FIamge"]);

                                img.Save(Server.MapPath("~/upload")+"/" + i.ToString() + ".jpg", System.Drawing.Imaging.ImageFormat.Jpeg);                                                                //string jpg = Server.MapPath("~/upload") + "\\" + i.ToString() + ".jpg";                                string jpg = "upload/"+i.ToString() + ".jpg";                               Response.Write("<img src='"+jpg+"' />");

                            }                        }                    }                }                //Response.End();                //reader.Close();            }          }    }}

转载于:https://www.cnblogs.com/qzc900809/archive/2013/01/04/2844914.html

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