如果，Else If Statement帮助 [英] If, Else If Statement help

问题描述

我可以使用If语句检查并查看三个级别吗？我正在做的是我有两个不同级别的登录工作。我想添加第三级登录。这就是我到目前为止。

Can I have the If statement to check and see for three levels? What I am doing is that I have it working for two different levels for login. I wanted to add a third level login. This is what I have so far.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;
using System.Configuration;
using System.Data;

public partial class Login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        
    }

    protected void Button1_Click(object sender, EventArgs e)
    {

        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["PassConnectionString"].ConnectionString);
        con.Open();

        if (true)
        {
            SqlCommand level = new SqlCommand("select AccessLevel, Password from TableSecurity where EmailAddress = @EmailAddress AND Password = @Password", con);
            level.Parameters.Add(new SqlParameter("EmailAddress", TextBoxEA.Text));
            level.Parameters.Add(new SqlParameter("Password", TextBoxPW.Text));

            SqlDataReader reader = level.ExecuteReader();
            DataTable dt1 = new DataTable();
            dt1.Load(reader);

            foreach (DataRow dr1 in dt1.Rows)
            {
                int returnedLevel = Convert.ToInt32(dr1[0].ToString());
                if (returnedLevel == 1)
                {
                    Response.Redirect("CEOPage.aspx");
                }

                else if (returnedLevel == 2)
                {
                    Response.Redirect("IALOPage.aspx");
                }
            }
        }
        con.Close();
    }
    
}

如何在代码中添加3级？

How can I add level 3 to the code?

推荐答案

继续CHill60的回答：

Further to CHill60's answer:

string[] levelPages = new string[] { "CEOPage.aspx", "IALOPage.aspx", "SomeOtherPage.aspx", };

//...

Response.Redirect(levelPages[returnedLevel - 1]);

-SA

继续jkirkerx的建议...

Further to jkirkerx' suggestion ...

switch (returnedlevel)
           {
               case 1:
                   Response.Redirect("CEOPage.aspx");
                   break;
               case 2:
                   Response.Redirect("IALOPage.aspx");
                   break;
               case 3:
                   Response.Redirect("SomeOtherPage.aspx");
                   break;
               default:
                   break;
           }

您可以根据需要添加任意数量的其他级别，也可以在最后添加一个catch-all其他块：

You can add as many elseif levels as you like, and optionally at the end, you could add a catch-all else block:

if (returnedLevel == 1)
                {
                    Response.Redirect("CEOPage.aspx");
                }
                else if (returnedLevel == 2)
                {
                    Response.Redirect("IALOPage.aspx");
                }
                else if (returnedLevel == 3)
                {
                    Response.Redirect("SomeOtherPage.aspx");
                }
                else
                {
                    Response.Redirect("SomeDefaultPage.aspx");
                }

正如jkirkerx在评论中所建议的，开关/ Case语句也可以。

And as jkirkerx suggested in the comments, a switch/Case statement would work as well.

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