SqlConnection conn;
SqlCommand cmd1;
protected void Page_Load(object sender, EventArgs e)
{
conn = new SqlConnection(..............);
conn.Open();

cmd1 = new SqlCommand("select * from user_information where name='alex'", conn);

dg1.DataSource = cmd1.ExecuteReader(CommandBehavior.CloseConnection);
dg1.DataBind();


}
public string FormatURL(object strArgument)
{
return ("format.aspx?guid=" + strArgument);
}

format.aspx:
// No Need To Write Any Thing.

.cs:
page_load()
{
cmd = new SqlCommand("Select logo from user_information where name='alex'", conn);

reader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
while (reader.Read())
{
Response.ContentType = "image/gif";
Response.BinaryWrite((byte[])reader["logo"]);
}
reader.Close();
}