如果条件为真,则代码不会返回

Question

我需要验证用户提供的信息是否在数据库中,我已经尝试输入正确的条件而不能正常工作它会返回一个在数据库中找不到的错误.你能检查我的代码并告诉我发生了什么吗？,我试图调试它,但foreach循环继续循环,并没有转到if(isexist)语句

protected void btnSubmit_Click(object sender, EventArgs e)
    {
        token = FormsAuthentication.HashPasswordForStoringInConfigFile(txtUsername.Text.ToString() + txtAcctNo.Text.ToString(), "MD5");
        try
        {
            bool isExist = false;
            DataSet ds = new DataSet();
            ds = startService.getAllUsersWithoutFilter();
            if (ds.Tables[0].Rows.Count > 0)
            {
                foreach (DataRow dRow in ds.Tables[0].Rows)
                {

                    string userName = dRow["UserName"].ToString();
                    string acctNo = dRow["AccountNumber"].ToString();
                    string question = dRow["SecretQuestion"].ToString();
                    string answer = dRow["SecretAnswer"].ToString();

                    if (userName == txtUsername.Text.ToString() && acctNo == txtAcctNo.Text.ToString() && question == cboQuestion.Text.ToString() &&  answer == txtAnswer.Text.ToString())
                    {
                        isExist = true;
                    }
                    else
                    {
                        isExist = false;
                    }

                }

                if (isExist)
                {
                    startService.sendTokenizer(txtUsername.Text.ToString(), token);
                    //update database to change password to standard password
                    startService.inserUserActivity(txtUsername.Text.ToString(), txtAcctNo.Text.ToString(), "Password Reset Request", HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]);
                    startService.requestReset(txtUsername.Text.ToString(), txtAcctNo.Text.ToString(), token);

                    lblMessage.ForeColor = System.Drawing.Color.Green;
                    lblMessage.Text = "<br>We have sent an email to you for the instructions to reset your password. Please check your email.";
                }
                else
                {
                    this.lblMessage.ForeColor = System.Drawing.Color.Red;
                    this.lblMessage.Text = "<br><br>Error - Information cannot be found. Please check and try again. Make sure all the fields are correct.";
                }

            }
        }
        catch
        {
            lblError.Text = "There was an error occured while processing your request. Please try again later.";
        }

    }

Answer 1

我认为你需要的是在将isExist设置为true时突破foreach循环.

if (userName == txtUsername.Text.ToString() && acctNo == txtAcctNo.Text.ToString() && question == cboQuestion.Text.ToString() &&  answer == txtAnswer.Text.ToString())
{
    isExist = true;
    break; //Found it, so stop looking.
}