登陆与注册中发生错误。

Question

这个是注册界面
----------------------using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Text;
using System.Security.Cryptography;public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            txtName.Attributes["onkeyup"] = "value=value.replace(/[^\\w+$]/g,'')";
        }
    }
    protected bool isName(string UserName)
    {
        string strcon = ConfigurationSettings.AppSettings["strCon"];
        string sqlstr = "select count(*) from Users where UserName = '" + UserName + "'";
        SqlConnection conn = new SqlConnection(strcon);
        conn.Open();
        SqlCommand cmd = new SqlCommand(sqlstr, conn);
        if (Convert.ToInt32(cmd.ExecuteScalar()) > 0)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    protected void queren_Click(object sender, EventArgs e)
    {
        if (isName(txtName.Text))
        {
            labIsName.Text = "用户名已存在！";
            labIsName.ForeColor = System.Drawing.Color.Red;
            RegisterStartupScript("", "<script>alert('请正确填写信息！')</script>");
        }
        else
        {
            string strcon = ConfigurationSettings.AppSettings["strCon"].ToString();
            string UserName;
            string MdPswdStr = GetMd5(txtPWD.Text.ToString());
            UserName = txtName.Text.ToString();
            string UserPWD = MdPswdStr;
            string UserEmail = UserEmail.Text.ToString();
            string UserSex = "";
            if (radlistSex.SelectedValue.Trim() == "男")
            {
                UserSex = "男";
            }
            else
            {
                UserSex = "女";
            }
            string UserQue = UserQue.Text;
            string UserAns = UserAns.Text;
            if (!isName(txtName.Text))
            {
                SqlConnection conn = new SqlConnection(strcon);
                conn.Open();
                string strsql = "insert into Users(UserName,UserSex,UserPWD,UserEmail,UserQue,UserAns) values( '" + UserName + "','" + UserSex + "','" + UserPWD + "','" + UserEmail + "','" + UserQue + "','" + UserAns + "')";
                SqlCommand cmd = new SqlCommand(strsql, conn);
                if (Convert.ToInt32(cmd.ExecuteNonQuery()) > 0)
                {
                    RegisterStartupScript("true", "<script>alert('恭喜您，注册成功……')</script>");
                    txtName.Text = txtPWD.Text = txtEmail.Text = txtPWD2.Text = "";
                    labIsName.Text = "";
                }
                else
                {
                    RegisterStartupScript("true", "<script>alert('请正确填写信息！')</script>");
                }
                conn.Close();
            }
            else
            {
                RegisterStartupScript("true", "<script>alert('用户名不能为空！')</script>");
            }
        }    }
    public static string GetMd5(string str)
    {
        string cl = DateTime.Now.Month + str + DateTime.Now.Day;
        string UawePWD = "";
        MD5 md5 = MD5.Create();
        byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
        s.Reverse();   
        for (int i = 3; i < s.Length - 1; i++) 
        {
            UawePWD = UawePWD + (s[i] < 198 ? s[i] + 28 : s[i]).ToString("X");
        }
        return UawePWD;
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (txtName.Text == "")
        {
            labIsName.Text = "用户名不能为空";
            labIsName.ForeColor = System.Drawing.Color.Red;
        }
        else
        {
            if (isName(txtName.Text))
            {
                labIsName.Text = "用户名已存在！";
                labIsName.ForeColor = System.Drawing.Color.Red;
            }
            else
            {
                labIsName.Text = "可以注册！";
                labIsName.ForeColor = System.Drawing.Color.Blue;
            }
        }
    }
}--------------------------------

这个是登陆界面---------------------------------
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
using System.Text;
using System.Security.Cryptography;
public partial class Default2 : System.Web.UI.Page
{
    string UserName;
    string UserPWD;
    protected void Page_Load(object sender, EventArgs e)
    {    }
    protected void denglu_Click(object sender, EventArgs e)
    {
        if (UserName.Text.Trim() != "" & UserPWD.Text.Trim() != "")
        {
            string MdPswdStr = GetMd5(UserPWD.Text.ToString());
            UserName = UserName.Text.ToString();
            UserPWD = MdPswdStr;
            if (Request.Cookies["user"] != null & Request.Cookies["pwd"] != null)
            {
                
                HttpCookie cuser = Request.Cookies["user"];
                cuser.Expires = DateTime.Now.AddDays(-1);
                Response.Cookies.Add(cuser);
                HttpCookie cpwd = Request.Cookies["pwd"];
                cpwd.Expires = DateTime.Now.AddDays(-1);
                Response.Cookies.Add(cpwd);
            }
            string strcon = ConfigurationSettings.AppSettings["strCon"];
            
            SqlConnection myconn = new SqlConnection(strcon);
            
            string strsql = "select * from Users where UserName=@name and PassWord=@pass";
            SqlCommand comm = new SqlCommand(strsql, myconn);
            myconn.Open();
            
            comm.Parameters.Add(new SqlParameter("name", SqlDbType.NVarChar, 50));
           
            comm.Parameters["name"].Value = UserName;
            comm.Parameters.Add(new SqlParameter("pass", SqlDbType.NVarChar, 50));
            comm.Parameters["pass"].Value = UserPWD;
            if (Convert.ToInt32(comm.ExecuteScalar()) > 0)
            {
                switch (ddlSave.SelectedValue)
                {
                    case "1":
                        CacheAddDate(7);
                        break;
                    case "2":
                        CacheAddDate(14);
                        break;
                }
                Response.Write("<script>alert('登录成功！');location='UserRegister.aspx'</script>");
               
                UserName.Text = UserPWD.Text = "";
            }
            else
            {
                Response.Write("<script>alert('用户名或密码错误！');location='UserRegister.aspx'</script>");
            }
            
            myconn.Close();
        }
        else
        {
            
            if (Request.Cookies["user"] != null & Request.Cookies["pwd"] != null)
            {                Response.Write("<script>alert('登录成功！');location='Default.aspx'</script>");
            }
            Response.Write("<script>alert('用户名或密码错误！');location='Default.aspx'</script>");
        }
    }    protected void CacheAddDate(int adddate)
    {
        Response.Cookies["user"].Value = UserName;
        Response.Cookies["user"].Expires = DateTime.Now.AddDays(adddate);
        Response.Cookies["pwd"].Value = UserPWD;
        Response.Cookies["pwd"].Expires = DateTime.Now.AddDays(adddate);
    }    public static string GetMd5(string str)
    {
        string cl = DateTime.Now.Month + str + DateTime.Now.Day;
        string UserPWD = "";
        MD5 md5 = MD5.Create();
        byte[] s = md5.ComputeHash(Encoding.UTF8.GetBytes(cl));
        s.Reverse();   
        for (int i = 3; i < s.Length - 1; i++)
        {
            UserPWD = UserPWD + (s[i] < 198 ? s[i] + 28 : s[i]).ToString("X");
        }
        return UserPWD;
    }
}错误是这些的：错误：“string”不包含“Text”的定义，并且找不到可接受类型为“string”的第一个参数的扩展方法“Text”(是否缺少 using 指令或程序集引用?) F:\WebSite38\Default2.aspx.cs 69 26 F:\WebSite38\

Answer 1

string UserQue = UserQue.Text;
string UserAns = UserAns.Text;这个地方你定义的变量和控件重名了。

Answer 2

控件尽量要标注开，
例如 一个textbox的，的name属性，命名为 txbUserName，你的变量可以命名为 strUserName

Answer 3

string UserEmail = UserEmail.Text.ToString();
=>
string UserEmail = txtEmail.Text.ToString();应该是你打错了的缘故