Using SharePoint People Editor Control

Hi All,
In one of my requirments , I was supposed to develop a custom visual webpart. The webpart was having people editor controls in it.
So this Post is all about People Editor Control.
To have this control on your *.acsx page(user control page), you have to first Register Assembly for it.
Code:

<%@ Register Tagprefix="SharePoint" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=14.0.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c" %>
For Adding People Editor Control to your Page :

<SharePoint:PeopleEditor  AllowEmpty="true" ID="pplprimarycontact"
                runat="server" MultiSelect="false"  SelectionSet="User" />
                                           or
<SharePoint:PeopleEditor ID="spAttendies" runat="server" MultiSelect="true"
                SelectionSet="User" />
Here  MultiSelect="true" will allow you to more than one users the the control.

SharePoint Column should be of Person or Group  type which hold the value for the input given by the user.
Now  some code listing:
1. Getting SPSite and SPWeb Objects
                   SPSite osite = SPContext.Current.Site;
                    SPWeb oweb = SPContext.Current.Web;
                      using (SPSite site = new SPSite(osite.ID))
                        {
                            using (SPWeb thisWeb = site.OpenWeb(oweb.ID))
                            {
                                //getting items values stored in item id.
                                SPList lststats = thisWeb.Lists["your list name here"];
                             //   -----------------------------------------------------
                                 // SPListItem edititemid = lststats.AddItem();
                                                        or(as per requirment)
                                 //SPListItem edititemid = lststats.Items.GetItemById(itemid);
                         //   .......
                          //    .......
                           //    ...         // Rest of the Source code will come here..  which iam providing.
                               }
1. Converting the user id into SPFieldUserValue (Important)
 This Method i will be using  in all other Listings.  It simply converts a user id into SPFieldUserValue object.

 public SPFieldUserValue ConvertLoginAccount(string userid, SPSite site, SPWeb web)
        {

            SPFieldUserValue uservalue;
            using (SPSite thissite = new SPSite(site.ID))
            {
                using (SPWeb thisweb = thissite.OpenWeb(web.ID))
                {
                    SPUser requireduser = thisweb.EnsureUser(userid);
                    uservalue = new SPFieldUserValue(thisweb, requireduser.ID, requireduser.LoginName);
                }

            }
            return uservalue;

        }

2. For adding single user to sharepoint list                  

                         string srprimaryuser=string .Empty;         
                        if (pplprimarycontact.ResolvedEntities.Count > 0)
                        { 
                        PickerEntity primarypickerEntity = (PickerEntity)pplprimarycontact.ResolvedEntities[0];
                        Hashtable primaryuser = primarypickerEntity.EntityData;
                         srprimaryuser = primaryuser["AccountName"].ToString();
                         item["Primary Contact Name"] = ConvertLoginAccount(srprimaryuser, site, thisWeb);
                        }

3. For adding many users to sharepoint list

                                      string[] userarray = spAttendies.CommaSeparatedAccounts.ToString().Split(',');
                                       SPFieldUserValueCollection usercollection = new SPFieldUserValueCollection();
                                       for (int i = 0; i < userarray.Length; i++)
                                       {
                                           SPFieldUserValue usertoadd = ConvertLoginAccount(userarray[i], osite, oweb);
                                           usercollection.Add(usertoadd);
                                       }
                                      item["Attendees"] = usercollection;

 

 

4. Fetching a single user and  displaying in people editor control.

                        ArrayList lst_contactuser = new ArrayList();
                        string stpuser = Convert.ToString(edititem["Primary Contact Name"]);
                        int phashindex = stpuser.IndexOf("#");
                        stpuser = stpuser.Remove(0, phashindex + 1);

                      
                        if (!stpuser.Equals(string.Empty))
                        {
                            SPFieldUserValue puser = ConvertLoginAccount(stpuser, site, thisWeb);
                            if (puser != null)
                            {

                                PickerEntity primarypicker = new PickerEntity();
                                primarypicker.Key = puser.User.Name;
                                primarypicker.IsResolved = true;
                                lst_contactuser.Add(primarypicker);
                                pplprimarycontact.UpdateEntities(lst_contactuser);
                                lst_contactuser.Clear();

                            }

 

5.  Fetching a Multiple users and  displaying in people editor control.

 

                                ArrayList _arrayList = new ArrayList();
                                SPFieldUserValueCollection users = edititemid["Attendees"] as SPFieldUserValueCollection;
                                if (users != null)
                                {
                                    foreach (SPFieldUserValue user in users)
                                    {
                                        PickerEntity _pickerEntity = new PickerEntity();
                                        _pickerEntity.Key = user.User.LoginName;
                                        _pickerEntity.IsResolved = true;
                                        _arrayList.Add(_pickerEntity);
                                    }
                                    spAttendies.UpdateEntities(_arrayList);
                                }

If you are facing any difficulty in using above please reply.