retreiving images from database and display as thumbnail images

hi, iam using asp.net with c#

i have table images

shop  nvarchar(50),

imgc  image

imgo   image

iam saving images in a database but while retreving it is showing blank images. i want to display as thumb nail images ,

can you correct my code which helps  me

saving code

========
protected void Button1_Click(object sender, EventArgs e)
{
 
if (FileUpload1.HasFile && FileUpload2.HasFile)
{
img1.ImageUrl = imgc.ImageUrl;
img2.ImageUrl = imgo.ImageUrl;
FileUpload1.SaveAs(MapPath("~/images/" + FileUpload1.FileName));
imgc.ImageUrl = "~/images/" + FileUpload1.FileName;
FileUpload2.SaveAs(MapPath("~/images/" + FileUpload2.FileName));
imgo.ImageUrl = "~/images/" + FileUpload2.FileName;
con.Open();
SqlCommand cmd = new SqlCommand("Addimgproc",con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.AddWithValue("@Shop","Alsafa");
FileInfo imageinfo = new FileInfo(FileUpload1.PostedFile.FileName.Trim());
byte[] content = new byte[imageinfo.Length];
FileStream imagestream = imageinfo.OpenRead();
imagestream.Read(content,0,content.Length);
imagestream.Close();
//2nd upload
FileInfo imageinfo1 = new FileInfo(FileUpload2.PostedFile.FileName.Trim());
byte[] content1 = new byte[imageinfo1.Length];
FileStream imagestream1 = imageinfo1.OpenRead();
imagestream1.Read(content1, 0, content1.Length);
imagestream1.Close();
cmd.Parameters.AddWithValue("@imgc", content);
cmd.Parameters.AddWithValue("@imgo",content1);
cmd.ExecuteNonQuery();
con.Close();
}
 
}

retreving code:

==============

 
protected void Page_Load(object sender, EventArgs e)
{
SqlCommand cmd = new SqlCommand("select imgc,imgo from images where Shop='Alsafa'",con);

con.Open();

SqlDataReader dr = cmd.ExecuteReader();
if (dr.HasRows)
{
while (dr.Read())

{
Image1.ImageUrl = dr["imgc"].ToString();
Image2.ImageUrl = dr["imgo"].ToString();

}
dr.Close();

}
con.Close();
}