.NET MVC Controller中生成验证码

Controller中的方法调用示例:

public ActionResult CheckCode() {
    ValidateCode2 vCode = new ValidateCode2();
    string code = vCode.CreateRandomCode(4);
    Session["ValidateCode"] = code;
    byte[] bytes = vCode.CreateImage(code);
    return File(bytes, "image/gif");
}
cs 文件大小:4.35KB