/// <summary>
///
/// </summary>
/// <param name="itemID"></param>
/// <param name="likeCount">1/-1点赞和取消赞</param>
private void SaveLikeUnLike(int itemID, int likeCount)
{
SPUser loginUser = SPContext.Current.Web.CurrentUser;
Guid webID = SPContext.Current.Web.ID;
SPSecurity.RunWithElevatedPrivileges(delegate()
{
using (SPSite mySite = new SPSite(SPContext.Current.Site.Url))
{
using (SPWeb thisWeb = mySite.AllWebs[webID])
{
thisWeb.AllowUnsafeUpdates = true;
try
{
string listUrl = Page.Request.FilePath;;
SPList list = thisWeb.GetList(listUrl);
SPListItem lstItem = list.GetItemById(itemID);
SPFieldUserValueCollection users = lstItem["LikedBy"] as SPFieldUserValueCollection;
SPFieldUserValue userValue = new SPFieldUserValue(thisWeb, loginUser.ID, loginUser.Name);
if (users != null)
{
lstItem["LikesCount"] = (double)lstItem["LikesCount"] + likeCount;
if (likeCount > 0)//点赞
{
users.Add(userValue);
lstItem["LikedBy"] = users;
}
else //取消赞
{
for (int i = 0; i < users.Count; i++)
{
if (users[i].LookupId == loginUser.ID)
{
users.RemoveAt(i);
break;
}
}
lstItem["LikedBy"] = users;
}
}
else
{
lstItem["LikedBy"] = loginUser;
lstItem["LikesCount"] = likeCount;
}
lstItem.Update();
}
catch (Exception ex)
{
this.Controls.Add(new LiteralControl(ex.ToString()));
}
thisWeb.AllowUnsafeUpdates = false;
}
}
});
}