/// <summary>
/// WebForm输出方法(在单独的页面输出)
/// </summary>
/// <param name="context"></param>
public void CreateImageOnPage(System.Web.HttpContext context)
{
ValidateCode vCode = new ValidateCode();
string code = vCode.CreateValidateCode(4);
byte[] bytes = vCode.CreateValidateGraphic(code);
context.Response.ClearContent();
context.Response.ContentType = "image/Jpeg";
context.Response.BinaryWrite(bytes);
}