[重写默认的4个权限设置相关的类：二]实现自定义成员提供程序MembershipProvider…

/// <summary>
///OverrideMembershipProvider 的摘要说明
/// </summary>
public class OverrideMembershipProvider:MembershipProvider
{

    public OverrideMembershipProvider()
    {

      
        //
        //TODO: 在此处添加构造函数逻辑
        //
    }

    protected XmlDocument GetDoc()//专门读取XML文件并返回一个XmlDocument对象的方法,自定义的一个方法，并非继承自MembershipProvider
    {

        XmlDocument doc = new XmlDocument();
        doc.Load(System.Web.Hosting.HostingEnvironment.MapPath(“~/Users.xml“));
        return doc;
    }

    protected void SaveDoc(XmlDocument doc)//保存对XML文件的修改（比如添加用户）,自定义的一个方法，并非继承自MembershipProvider
    {

        doc.Save(System.Web.Hosting.HostingEnvironment.MapPath(“~/Users.xml“));    
    }

    private string applicationName;
    public override string ApplicationName//应用程序名
    {

        get
        {

            return applicationName;
        }
        set
        {

            applicationName = value;
        }
    }

    public override string Description//一些描述
    {

        get
        {

            return “没啥说的吧.“;
        }
    }

    public override bool EnablePasswordReset//是否允许用户重置其密码
    {

        get { return false; }
    }

    public override bool EnablePasswordRetrieval//是否允许用户检索其密码
    {

        get { return false; }
    }

    public override void Initialize(string name, System.Collections.Specialized.NameValueCollection config)
    {

        applicationName = System.Web.Hosting.HostingEnvironment.ApplicationVirtualPath;
        base.Initialize(name!=null?name:“OverrideMembershipProvider“, config);       
    }

    public override bool ValidateUser(string username, string password)
    {

        if (GetDoc().SelectSingleNode(“//User[@Name=’“ + username + “‘ and PassWord=’“ + password + “‘]“) == null)
        {

            return false;
        }
        else
        {

            return true;
        }

    }

    public override MembershipUser GetUser(string username, bool userIsOnline)
    {

        XmlNode x = GetDoc().SelectSingleNode(“//User[@Name=’“ + username +  “‘]“);
        if (x == null)
            return null;
        else
        {

            MembershipUser user = new MembershipUser(Name, x.Attributes[“Name“].Value, null, x[“Email“].InnerText, x[“PassWordQuestion“].InnerText,string.Empty, Convert.ToBoolean(x[“IsLockedOut“].InnerText), Convert.ToBoolean(x[“IsApproved“].InnerText), Convert.ToDateTime(x[“CreatingDate“].InnerText), Convert.ToDateTime(x[“LastLoginDate“].InnerText), Convert.ToDateTime(x[“LastActivityDate“].InnerText), Convert.ToDateTime(x[“LastPassWordChangedDate“].InnerText), Convert.ToDateTime(x[“LastLockOutDate“].InnerText));
            return user;
        } 
    }

    public override MembershipUserCollection GetAllUsers(int pageIndex, int pageSize, out int totalRecords)
    {

        XmlNodeList xl = GetDoc().DocumentElement.ChildNodes;
        totalRecords = xl.Count;
        if (pageIndex * pageSize > xl.Count) return null;
        else
        {

            MembershipUserCollection mc = new MembershipUserCollection();
            for (int i = pageIndex * pageSize ; i < xl.Count&&pageSize>0; i++,pageSize—)
            {

                XmlNode x = xl[i];
                mc.Add(new MembershipUser(Name, x.Attributes[“Name“].Value, null, x[“Email“].InnerText, x[“PassWordQuestion“].InnerText, null, Convert.ToBoolean(x[“IsLockedOut“].InnerText), Convert.ToBoolean(x[“IsApproved“].InnerText), Convert.ToDateTime(x[“CreatingDate“].InnerText), Convert.ToDateTime(x[“LastLoginDate“].InnerText), Convert.ToDateTime(x[“LastActivityDate“].InnerText), Convert.ToDateTime(x[“LastPassWordChangedDate“].InnerText), Convert.ToDateTime(x[“LastLockOutDate“].InnerText)));
            }
            return mc;

        }
    }

    public override string GetUserNameByEmail(string email)
    {

        XmlNode x = GetDoc().SelectSingleNode(“//User[Email=’“ + email + “‘]“);
        if (x == null)
           return null;
        else
            return x.Attributes[“Name“].Value;
    }

    public override MembershipUser CreateUser(string username, string password, string email, string passwordQuestion, string passwordAnswer, bool isApproved, object providerUserKey, out MembershipCreateStatus status)
    {

        XmlDocument x=GetDoc();
        if (x.SelectSingleNode(“//User[@Name=’“ + username + “‘]“) != null) 
        {

            status = MembershipCreateStatus.DuplicateUserName;
            return null;
        }
        XmlElement xe = x.DocumentElement;
        MembershipUser user = new MembershipUser(Name, username, null, email, passwordQuestion, “”, isApproved, false, DateTime.Now, DateTime.Now, DateTime.Now, DateTime.Now, DateTime.Now);

        xe.InnerXml+= “ <User Name=\“”+username+“\“>“+
        “<PassWord>“+password+“</PassWord>“+
        “<Email>“+email+“</Email>“+
        “<PassWordQuestion>“ + passwordQuestion + “</PassWordQuestion>“ +
        “<PassWordAnswer>“ + passwordAnswer + “</PassWordAnswer>“ +
        “<IsApproved>“ + isApproved + “</IsApproved>“ +
        “<IsLockedOut>false</IsLockedOut>“ +
        “<CreatingDate>“ +user.CreationDate.ToString() + “</CreatingDate>“ +
        “<LastLoginDate>“ + user.LastLoginDate.ToString() + “</LastLoginDate>“ +
        “<LastActivityDate>“ +user.LastActivityDate.ToString() + “</LastActivityDate>“ +
        “<LastPassWordChangedDate>“ + user.LastPasswordChangedDate.ToString() + “</LastPassWordChangedDate>“ +
        “<LastLockOutDate>“ + user.LastLockoutDate.ToString() + “</LastLockOutDate></User>“;
        SaveDoc(x);
        status = MembershipCreateStatus.Success;
        return user;

    }

}