SPGroup 和SPUser的常用操作

    private bool RemoveUserFromGroup(string sGoupName, string sUserLoginName)
    {
bool res = false;
try
        {
            SPWeb web = SPContext.Current.Web;
            SPGroup oGroup = web.SiteGroups[sGoupName];
            SPUser oUser = GetSPUser(sUserLoginName);
if (oUser != null)
            {
                web.AllowUnsafeUpdates = true;
                oGroup.RemoveUser(oUser);
                oGroup.Update();
                res = true;
                web.AllowUnsafeUpdates = false;
            }
        }
catch (Exception ex)
        {
string sMessage = ex.Message;
//throw;
        }
return res;
    }
private bool RemoveUserFromGroup(SPGroup oGroup, SPUser oUser)
    {
bool res = false;
try
        {
            SPWeb web = SPContext.Current.Web;
if (oUser != null&&oGroup!=null)
            {
                web.AllowUnsafeUpdates = true;
                oGroup.RemoveUser(oUser);
                oGroup.Update();
                res = true;
                web.AllowUnsafeUpdates = false;
            }
        }
catch (Exception ex)
        {
string sMessage = ex.Message;
//throw;
        }
return res;
    }
private SPUser GetSPUser(string sLoginName)
    {
        SPUser oUser = null;
try
        {
if (!string.IsNullOrEmpty(sLoginName))
            {
                oUser = SPContext.Current.Web.EnsureUser(sLoginName);
            }
        }
catch (Exception ex)
        {
string sMessage = ex.Message;
        }
return oUser;
    }

private void RemoveUser(string sLoginName)
    {
        SPUser oUser = GetSPUser(sLoginName);
if (oUser!=null)
        {
            SPGroupCollection groups = oUser.Groups;
if (groups!=null&&groups.Count>0)
            {
foreach (SPGroup g in groups)
                {
                    RemoveUserFromGroup(g, oUser);
                }
            }
        }
    }


private bool AddUserIntoGroup(string sGroupName, string sUserLoginName)
    {
bool res = false;
try
        {
            SPWeb web = SPContext.Current.Web;
            web.AllowUnsafeUpdates = true;
            SPGroup oGroup = web.SiteGroups[sGroupName];
            SPUser oUser = GetSPUser(sUserLoginName);
if (oUser != null)
            {
                oGroup.AddUser(oUser);
                oGroup.Update();

                res = true;
            }
            web.AllowUnsafeUpdates = false;
        }
catch (Exception ex)
        {
string sMessage = ex.Message;
//throw;
        }
return res;
    }

private string FilterSPUserString(string str)
    {
if (string.IsNullOrEmpty(str))
        {
return str;
        }
if (str.IndexOf(";#") > 0)
        {
            str = str.Substring(str.LastIndexOf(";#") + 2);
        }
return str;
    }


private bool CreateSiteGroup(string sGroupName, string sGroupDescription)
    {
bool res = false;
using (SPWeb oWebsiteRoot = SPContext.Current.Site.RootWeb)
        {
            oWebsiteRoot.AllowUnsafeUpdates = true;
            SPGroupCollection collGroups = oWebsiteRoot.SiteGroups;
string sLoginName = SPContext.Current.Web.CurrentUser.LoginName;
            SPUser oUser = oWebsiteRoot.Users[sLoginName];
            SPMember oMember = oWebsiteRoot.Users[sLoginName];
            collGroups.Add(sGroupName, oMember, oUser, "Description");
            oWebsiteRoot.AllowUnsafeUpdates = false;
            res = true;
        }
return res;
    }
/// <summary>
/// 給組賦許可權
/// </summary>
/// <param name="sGroupName"></param>
/// <param name="sPermissionLever"></param>
/// <returns></returns>
    private bool SetGroupPermission(string sGroupName, string sPermissionLever)
    {
bool res = false;
using (SPWeb oWebsiteRoot = SPContext.Current.Site.RootWeb)
        {
            oWebsiteRoot.AllowUnsafeUpdates = true;
            SPRoleAssignment roleAssignment = new SPRoleAssignment(oWebsiteRoot.SiteGroups[sGroupName]);
            roleAssignment.RoleDefinitionBindings.Add(oWebsiteRoot.RoleDefinitions[sPermissionLever]);
            oWebsiteRoot.Update();
            oWebsiteRoot.AllowUnsafeUpdates = false;
            res = true;
        }
return res;
    }

private void DeleteSiteGroup(SPWeb web, string groupName)
    {
        web.AllowUnsafeUpdates = true;
        SPGroupCollection groups = web.SiteGroups;
        groups.Remove(groupName);
        web.Update();
        web.AllowUnsafeUpdates = false;
    }

 判斷目前使用者是否存在該組

   public  bool IsUserInGroup(string groupName)
   {  
bool inGroup = false;    
try  
       {     
           SPGroup group = SPContext.Current.Web.Groups[groupName];      
           inGroup = group.ContainsCurrentUser; 
       }  
catch (Exception ex)  
       {      
// SharePoint throws an exception if the group indexer     
// is not a group the current user belongs to.     
           inGroup = false;   
       }  
return inGroup;
   }