/// <summary>
/// 返回验证码
/// </summary>
/// <returns></returns>
public ActionResult GetValidateCode()
{
ValidateCode vCode = new ValidateCode();
string code = vCode.CreateValidateCode(5);
Session["ValidateCode"] = code;
byte[] bytes = vCode.CreateValidateGraphic(code);
return File(bytes, @"image/jpeg");
}
{// #### #一般处理程序中如果要用session，必须条件上边这个接口
public void ProcessRequest(HttpContext context)
{
context.Response.ContentType = "text/plain";
Common.ValidateCode vc = new Common.ValidateCode();
string code = vc.CreateValidateCode(4);
context.Session["code"] = code;//#### #
vc.CreateValidateGraphic(code, context);
}
/// <summary>
/// 展示验证码并将验证码中的字符串保存至Session中
/// </summary>
/// <returns></returns>
public ActionResult ValidateCode()
{
//1 创建自定义验证码类
Common.ValidateCode validateCode = new Common.ValidateCode();
//2 调用该类中的创建验证码的方法，给我们返回验证码对应的字符串（4个数字）
string code = validateCode.CreateValidateCode(4);//创建长度为4个字母的图片
Session["validateCode"] = code; //将验证码保存至Session（未保存至分布式缓存）
byte[] buffer = validateCode.CreateValidateGraphic(code);
return File(buffer, "imge.jpg");
}