界面如下：

然后，click filter button后的UI：

看，筛选出来了，代码如下（js能调C#写的UserInfo类的各个属性）

private void btnSearch_Click(object sender, EventArgs e)
        {
            List<UserInfo> users = FilterUsers(txtFilter.Text.Trim());
            lstUsers.DataSource = users;
        }

        private List<UserInfo> FilterUsers(string jsFilter)
        {
            List<UserInfo> results = new List<UserInfo>();
            if (jsFilter.Trim().Length == 0)
                return this.users;

            try
            {
                using (JavascriptContext context = new JavascriptContext())
                {
                    foreach (UserInfo user in this.users)
                    {
                        context.SetParameter(\"user\", user);
                        context.SetParameter(\"isInclude\", false);
                        string js = string.Format(@\"
                                                if({0})
                                                    isInclude=true;
                                                else
                                                    isInclude=false;\", jsFilter);
                        context.Run(js);
                        bool isInclude = (bool)context.GetParameter(\"isInclude\");
                        if (isInclude)
                            results.Add(user);
                    }
                }
            }
            catch
            {
                txtFilter.Focus();
                txtFilter.SelectAll();
                return this.users;
            }

            return results;
        }