How to Role-Provider Implementation into LINQ in Asp.Net MVC?
2265
23-Dec-2013
How to Role-Provider Implementation into LINQ in Asp.Net MVC?
Pravesh Singh
23-Dec-2013using System.Web.Security;
using System.Configuration.Provider;
using System;
using System.Linq;
/*
This provider works with the following schema for the tables of role data.
CREATE TABLE [tblRoles] (
[Rolename] NVARCHAR (255) NOT NULL,
[ApplicationName] NVARCHAR (255) NOT NULL,
CONSTRAINT [PKRoles] PRIMARY KEY
CLUSTERED ([Rolename] ASC, [ApplicationName] ASC)
);
CREATE TABLE [tblUsersInRoles] (
[Username] NVARCHAR (255) NOT NULL,
[Rolename] NVARCHAR (255) NOT NULL,
[ApplicationName] NVARCHAR (255) NOT NULL,
CONSTRAINT [PKUsersInRoles] PRIMARY KEY
CLUSTERED ([Username] ASC, [Rolename] ASC, [ApplicationName] ASC)
);
*/
namespace mvc2.Models
{
public class CustomRoleProvider : RoleProvider
{
private string pApplicationName = "MyApplicationName";
Database1Entities db; //ADO.NET Entity Data Mode(Entity Framework 6.0)
public override string ApplicationName
{
get { return pApplicationName; }
set { pApplicationName = value; }
}
public override bool DeleteRole(string rolename, bool throwOnPopulatedRole)
{
db = new Database1Entities();
if (!RoleExists(rolename))
{
throw new ProviderException("Role does not exist.");
}
if (throwOnPopulatedRole && GetUsersInRole(rolename).Length > 0)
{
throw new ProviderException("Cannot delete a populated role.");
}
var resultRoles = db.tblRoles.Where(x => x.Rolename == rolename &&
x.ApplicationName == ApplicationName);
db.tblRoles.RemoveRange(resultRoles);
var resultUserInRoles = db.tblUsersInRoles.Where(x => x.Rolename == rolename &&
x.ApplicationName == ApplicationName);
db.tblUsersInRoles.RemoveRange(resultUserInRoles);
db.SaveChanges();
return true;
}
public override string[] GetAllRoles()
{
db = new Database1Entities();
return db.tblRoles.Where(x => x.ApplicationName == ApplicationName)
.Select(x => x.Rolename).ToArray();
}
public override string[] GetUsersInRole(string rolename)
{
db = new Database1Entities();
return db.tblUsersInRoles.Where(x => x.Rolename == rolename &&
x.ApplicationName == ApplicationName).Select(x => x.Username).ToArray();
}
public override void RemoveUsersFromRoles(string[] usernames, string[] rolenames)
{
foreach (string rolename in rolenames)
{
if (!RoleExists(rolename))
{
throw new ProviderException("Role name not found.");
}
}
foreach (string username in usernames)
{
foreach (string rolename in rolenames)
{
if (!IsUserInRole(username, rolename))
{
throw new ProviderException("User is not in role.");
}
}
}
db = new Database1Entities();
foreach (string username in usernames)
{
foreach (string rolename in rolenames)
{
tblUsersInRole result = db.tblUsersInRoles.Where(x =>
x.Username == username &&
x.Rolename == rolename &&
x.ApplicationName == ApplicationName).FirstOrDefault();
if (result != null)
{
db.tblUsersInRoles.Remove(result);
}
}
}
db.SaveChanges();
}
public override string[] FindUsersInRole(string rolename, string usernameToMatch)
{
db = new Database1Entities();
return db.tblUsersInRoles.Where(x =>
x.Username == usernameToMatch &&
x.Rolename == rolename &&
x.ApplicationName == ApplicationName
).Select(x => x.Username).ToArray();
}
public override bool RoleExists(string rolename)
{
Database1Entities db = new Database1Entities();
bool exists = db.tblRoles.Where(x => x.Rolename == rolename &&
x.ApplicationName == ApplicationName).Count() > 0 ? true : false;
return exists;
}
public override void AddUsersToRoles(string[] usernames, string[] rolenames)
{
db = new Database1Entities();
int RoleCheck = rolenames.Where(x => RoleExists(x)).Count();
if (RoleCheck == 0)
{
throw new ProviderException("Role name not found.");
}
int CheckCommasInUsername = usernames.Where(x => x.ToString().Contains(",")).Count();
if (CheckCommasInUsername > 0)
{
throw new ArgumentException("User names cannot contain commas.");
}
foreach (string username in usernames)
{
foreach (string rolename in rolenames)
{
if (IsUserInRole(username, rolename))
{
throw new ProviderException("User is already in role.");
}
}
}
foreach (string username in usernames)
{
foreach (string rolename in rolenames)
{
tblUsersInRole newRecord = new tblUsersInRole();
newRecord.Username = username;
newRecord.Rolename = rolename;
newRecord.ApplicationName = ApplicationName;
db.tblUsersInRoles.Add(newRecord);
}
}
db.SaveChanges();
}
public override void CreateRole(string rolename)
{
if (rolename.Contains(","))
{
throw new ArgumentException("Role names cannot contain commas.");
}
if (RoleExists(rolename))
{
throw new ProviderException("Role name already exists.");
}
db = new Database1Entities();
tblRole newRole = new tblRole();
newRole.Rolename = rolename;
newRole.ApplicationName = ApplicationName;
db.tblRoles.Add(newRole);
db.SaveChanges();
}
public override string[] GetRolesForUser(string username)
{
db = new Database1Entities();
return db.tblUsersInRoles.Where(x => x.Username == username &&
x.ApplicationName == ApplicationName).Select(x => x.Rolename).ToArray();
}
public override bool IsUserInRole(string username, string rolename)
{
db = new Database1Entities();
return db.tblUsersInRoles.Where(x =>
x.Username == username &&
x.Rolename == rolename &&
x.ApplicationName == ApplicationName).Count() > 0 ? true : false;
}
}
}