How to populate people group field in sharepoint list -- server object model

                   

using System;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using Microsoft.SharePoint;

using Microsoft.SharePoint.WebControls;

using System.Data;

using System.IO;

namespace peoplegroup

{

    public partial class peoplegroupUserControl : UserControl

    {

       protected void btnSubmit_Click(object sender, EventArgs e)

        {

             string owneraccounts = pplpicker.CommaSeparatedAccounts;

             char[] split = { ',' };

            SPSite site = SPContext.Current.Site;

            SPWeb web = site.RootWeb;

            SPList ownerList = web.Lists["ownerdetails"];

            SPListItem ownerListItem = ownerList.Items.Add();

            ownerListItem["owner"] = PersonIncharge();

           

            web.AllowUnsafeUpdates = false;

            ownerListItem.Update();

            web.AllowUnsafeUpdates = true;

                 }

}

}

Aspx  Code

<SharePoint:PeopleEditor ID="pplpicker" runat="server" Height="25px"

                Width="200px" AutoPostBack="True" BorderStyle="Groove" DialogHeight="200"

                DialogWidth="200" MultiSelect="False" Rows="1"

                SelectionSet="User,SecGroup,SPGroup" />

<asp:Button ID="btnSubmit" runat="server" Text="Submit" onclick="btnSubmit_Click"/>

             

             string[] splitPeoplePickerData = owneraccounts.Split(split);

            

             SPFieldUserValueCollection pplgrpcoll = new SPFieldUserValueCollection();

              for (int i = 0; i < splitPeoplePickerData.Length; i++)

            string[] splitPPData = Accounts.Split(splitter);

              {

                string SelectedAccount = splitPeoplePickerData[i];

                if (SelectedAccount != string.))

                 {

                  SPUser user = web.SiteUsers[SelAccount];

                  

                 SPFieldUserValue pplgrpfld = new SPFieldUserValue(web, user.ID, user.LoginName);

                    pplgrpcoll.Add(pplgrpfld);

                 }

               }