Then create a WebPart with checkbox list which displays the users and button to add user to the list.
using System;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Web.UI;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.WebControls;
using Microsoft.SharePoint;
namespace userselect
{
[Guid("cdcee41f-cb36-42eb-b2d8-36af57fbcbd8")]
public class userselect : Microsoft.SharePoint.WebPartPages.WebPart
{
private bool _error = false;
private string _myProperty = null;
Dictionary<int,string> UserInfo= new Dictionary<int,string>();
Button AddUser;
TextBox txtInfo;
CheckBoxList UserList;
public userselect()
{
this.ExportMode = WebPartExportMode.All;
}
protected override void CreateChildControls()
{
if (!_error)
{
try
{
base.CreateChildControls();
UserList = new CheckBoxList();
Get_UserList();
UserList.ID = "UserList";
UserList.DataSource =UserInfo;
UserList.DataValueField = "Key";
UserList.DataTextField = "Value";
UserList.DataBind();
Controls.Add(UserList);
AddUser = new Button();
AddUser.ID = "AddUser";
AddUser.Text = "Add User";
AddUser.Click += new EventHandler(AddUser_Click);
this.Controls.Add(AddUser);
}
catch (Exception ex)
{
HandleException(ex);
}
}
}
void AddUser_Click(object sender, EventArgs e)
{
string temp=string.Empty;
SPSite site = new SPSite("http://url");
SPWeb web = site.OpenWeb();
for (int index = 0; index < UserList.Items.Count; index++)
{
if (UserList.Items[index].Selected)
{
int id=int.Parse(UserList.Items[index].Value);
temp = id.ToString()+";#"+web.Users.GetByID(id).LoginName+";#";
}
}
txtInfo.Text = temp;
//remove the extra symbol
if (temp.EndsWith(";#"))
{
temp = temp.Substring(0, temp.Length - 2);
}
SPList list = web.Lists["newlist"];
SPListItem item = list.Items.Add();
item["Title"] = "from sugu";
item["user"] = temp;
item.Update();
}
/// <summary>
/// Ensures that the CreateChildControls() is called before events.
/// Use CreateChildControls() to create your controls.
/// </summary>
/// <param name="e"></param>
protected override void OnLoad(EventArgs e)
{
if (!_error)
{
try
{
base.OnLoad(e);
this.EnsureChildControls();
// Your code here...
}
catch (Exception ex)
{
HandleException(ex);
}
}
}
/// <summary>
/// Clear all child controls and add an error message for display.
/// </summary>
/// <param name="ex"></param>
private void HandleException(Exception ex)
{
this._error = true;
this.Controls.Clear();
this.Controls.Add(new LiteralControl(ex.Message));
}
private void Get_UserList()
{
UserInfo.Clear();
SPSite site = new SPSite("http://url");
SPWeb web = site.OpenWeb();
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Important: