将图像保存到数据库以在asp.net中检索图像

Question

How to save image multipal in sql server in byte format ,and retrieve it in image tool without using httphandlar also convert it to pdf. please guid me the easy way .

I tried:

if (FileUpload2.HasFile)
        {
            int length = FileUpload2.PostedFile.ContentLength;
            byte[] imgbyt = new byte[length];
            HttpPostedFile img = FileUpload2.PostedFile;
            img.InputStream.Read(imgbyt, 0, length);
            string filename = Path.GetFileName(FileUpload2.FileName);
            lbl_image.Text = filename;
            con.Open();
            cmd = new SqlCommand("update StudData set student_image = @image, image_name= @filename where userid='" + Session["Loginname"] + "'", con);
            cmd.Parameters.Add("@image", SqlDbType.Image).Value = imgbyt;
            cmd.Parameters.Add("@filename", SqlDbType.VarChar, 50).Value = filename;
            int count = cmd.ExecuteNonQuery();
            con.Close();

        }

It store image in sql in byte format but How I retrieve it? please suggest me easiest way

Answer 1

Try this

Add an image tag on your aspx page

<img src='"<%=imageSrc%>"' />

Then on the code behind page get the Base64 of the image from the byte array that will come from the db.

string imageSrc = string.Format("data:image/jpeg;base64,{0}", Convert.ToBase64String(bytes, 0, bytes.Length));