使用ASP.NET Membership的方法

最简单的过程如下：

1.建立一个名为 CustomMemberShipProvider类，从MembershipProvider继承；并重写其中的ValidateUser方法：

public class CustomMemberShipProvider : MembershipProvider
    {
        /// <summary>
        /// 验证用户
        /// </summary>
        /// <param name="username"></param>
        /// <param name="password"></param>
        /// <returns></returns>
        public override bool ValidateUser(string username, string password)
        {
            //查询用户
            return 1 == new xxxEntities().Table_User
                .Count(x => x.UserId == username && x.Password == password);            
        }


        public override string ApplicationName
        {
            get
            {
                return "xxx";
            }
            set
            {
                throw new NotImplementedException();
            }
        }

        //其余代码不做任何修改
    }

2.修改web.config文件，添加一个MembershipProvide，设置如下：

    <membership defaultProvider="CustomMembershipProvide">
      <providers >
        <clear />
        <!--<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />-->
        <add name="CustomMembershipProvide" type="xxx.Models.CustomMemberShipProvider" />
      </providers>
    </membership>
    <profile>

3.如果在Asp.net MVC中，在Action前面加上 [Authorize]，即可实现匿名的身份认证。