使用C#简单完成用户注册功能

using UnityEngine;
using System.Collections;
public class UserRegister : MonoBehaviour
{

    // Use this for initialization

    void Start(){}

    public string username = "";
    public string password = "";
    public string rePassword="";
    public string age="";
    public string email = "";
    public string gender = "";

    public string showmessage = "";

    public void OnGUI()
    {
        GUILayout.Label(showmessage);

        GUILayout.Label("用户名：");
        username = GUILayout.TextField(username);

        GUILayout.Label("密码：");
        password = GUILayout.TextField(password);

        GUILayout.Label("重复密码：");
        rePassword = GUILayout.TextField(rePassword);

        GUILayout.Label("年龄：");
        age = GUILayout.TextField(age);

        GUILayout.Label("Email：");
        email = GUILayout.TextField(email);

        GUILayout.Label("性别：");
        gender = GUILayout.TextField(gender);

        checkInput();
    }

    private string[] domainArray = new string[]{ //判断邮箱后缀
        ".com",
        ".net",
        ".cn"
    };

    private void checkInput()
    {
        showmessage = "";
        if (username == "")
        {
            showmessage += "用户名不能为空\n";
        }
        else if (username.Length < 5 || username.Length > 10)
        {
            showmessage += "用户名的长度为5-10";
        }
        else
        {
            for (int i = 0; i < username.Length; i++)
            {
                char c = username[i];
                if (
                 (c >= 'a' && c <= 'z') ||
                  (c >= 'A' && c <= 'Z') ||
                         (c >= '0' && c <= '9') ||
                             (c == '_'))
                {
                    // is a right string
                }
                else
                {
                    showmessage += "用户名只能由字母，数字，_组成\n ";
                }
            }

            if (username.IndexOf("sb") != -1)
            {
                showmessage += "用户名里面不能有敏感字眼\n";
            }
        }
        

        if (password.Length < 6 || password.Length > 10) {
            showmessage += "密码长度为6-10位\n";
        }
        if (rePassword != password) {
            showmessage += "两次输入的密码不一致\n";
        }
        int ageTemp = 0;
        if (!int.TryParse(age, out ageTemp)) {
            showmessage += "姓名必须输入数字\n";
        } else {
            if (ageTemp <= 0 || ageTemp > 100) {
                showmessage += "年龄的范围必须为1-100\n";
            }
        }


        if (email.IndexOf("@") == -1) {
            showmessage += "邮箱输入的格式不合法\n";
        } else {
            bool isRight=false;
            for (int i = 0; i < domainArray.Length; i++) {
                if (email.EndsWith(domainArray[i])) {
                    isRight = true; break;
                }
            }
            if (!isRight) {
                showmessage += "邮箱输入的格式不合法\n";
            }
        }

        if (gender == "男" || gender == "女") {
        } else {
            showmessage += "性别必须填写男或者女";
        }
    }

}