急！Login控件的访问问题

Question

我在页面上创建一个Login控件，为了使用Access数据库来验证，我把它转换为模板，然后我在它<LayoutTemplate>里嵌入一个用来输入验证码的TexBox控件，我在后台尝试获该TextBox的值，但以失败告终，请问应该如何访问TextBox中的值呢，麻烦各位赐教，先谢过！

Answer 1

TextBox tb = (TextBox)Login1.FindControl("UserName");
 tb.Text.Trim();UserName是你TextBox 控件的ID

Answer 2

使用Login控件，结合MembershipProvider，UI里不需要任何代码。WEB.CONFIG的配置，放到system.web之内：
  <authentication mode="Forms">
      <forms loginUrl="logon.aspx"/>
    </authentication>    <membership defaultProvider="MyMembership">
      <providers>
          <clear />
          <add name="MyMembership" type="YourNameSpace.YourMembership" applicationName="YourApplicationName" />
      </providers>
    </membership>//这段放到 system.Web之外
<location path="需要验证访问的WEB文件夹，所有需要验证访问的aspx文件都放到这个文件夹里">
    <system.web>
      <authorization>
        <deny users="?"/>
      </authorization>
    </system.web>
</location>代码：
public class YourMembership:MembershipProvider 
    {
        public override string ApplicationName
        {
            get
            {
                return this.ApplicationName;
            }
            set
            {
                this.ApplicationName = value;
            }
        }    public override bool ValidateUser(string username, string password)
        {
            //联接数据库验证用户名和密码。返回true or false;
        }//下面的方法根据LoginControl需要实现。
        public override bool ChangePassword(string username, string oldPassword, string newPassword)
        {
            throw new NotImplementedException();
        }        public override bool ChangePasswordQuestionAndAnswer(string username, string password, string newPasswordQuestion, string newPasswordAnswer)
        {
            throw new NotImplementedException();
        }        public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status)
        {
            throw new NotImplementedException();
        }        public override bool DeleteUser(string username, bool deleteAllRelatedData)
        {
            throw new NotImplementedException();
        }        public override bool EnablePasswordReset
        {
            get { throw new NotImplementedException(); }
        }        public override bool EnablePasswordRetrieval
        {
            get { throw new NotImplementedException(); }
        }        public override MembershipUserCollection FindUsersByEmail(string emailToMatch, int pageIndex, int pageSize, out int totalRecords)
        {
            throw new NotImplementedException();
        }        public override MembershipUserCollection FindUsersByName(string usernameToMatch, int pageIndex, int pageSize, out int totalRecords)
        {
            throw new NotImplementedException();
        }        public override MembershipUserCollection GetAllUsers(int pageIndex, int pageSize, out int totalRecords)
        {
            throw new NotImplementedException();
        }        public override int GetNumberOfUsersOnline()
        {
            throw new NotImplementedException();
        }        public override string GetPassword(string username, string answer)
        {
            throw new NotImplementedException();
        }        public override MembershipUser GetUser(string username, bool userIsOnline)
        {
            throw new NotImplementedException();
        }        public override MembershipUser GetUser(object providerUserKey, bool userIsOnline)
        {
            throw new NotImplementedException();
        }        public override string GetUserNameByEmail(string email)
        {
            throw new NotImplementedException();
        }        public override int MaxInvalidPasswordAttempts
        {
            get { throw new NotImplementedException(); }
        }        public override int MinRequiredNonAlphanumericCharacters
        {
            get { throw new NotImplementedException(); }
        }        public override int MinRequiredPasswordLength
        {
            get { throw new NotImplementedException(); }
        }        public override int PasswordAttemptWindow
        {
            get { throw new NotImplementedException(); }
        }        public override MembershipPasswordFormat PasswordFormat
        {
            get { throw new NotImplementedException(); }
        }        public override string PasswordStrengthRegularExpression
        {
            get { throw new NotImplementedException(); }
        }        public override bool RequiresQuestionAndAnswer
        {
            get { throw new NotImplementedException(); }
        }        public override bool RequiresUniqueEmail
        {
            get { throw new NotImplementedException(); }
        }        public override string ResetPassword(string username, string answer)
        {
            throw new NotImplementedException();
        }        public override bool UnlockUser(string userName)
        {
            throw new NotImplementedException();
        }        public override void UpdateUser(MembershipUser user)
        {
            throw new NotImplementedException();
        }
    }