public class UserInfo{public string FirstName { get; set; }public string LastName { get; set; }public int Age { get; set; }public override string ToString(){return string.Format("{0}, {1}: {2}", FirstName, LastName, Age);}}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;elseisInclude=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;}

private void btnTest_Click(object sender, EventArgs e){using (JavascriptContext context = new JavascriptContext()){Stopwatch sw = new Stopwatch();sw.Start();int i=1000000;while(i-- > 0){context.SetParameter("ii", 1);context.SetParameter("jj", 2);context.SetParameter("sum", 0);string js = string.Format(@"sum=ii+jj;");context.Run(js);int sum = (int)context.GetParameter("sum");}sw.Stop();long useJS_Total = sw.ElapsedMilliseconds;float useJS_Average = ((float)sw.ElapsedMilliseconds) / 1000000;sw.Reset();sw.Start();i = 1000000;while (i-- > 0){int ii = 1;int jj = 2;int sum = 0;sum = ii + jj;}sw.Stop();long nouseJS_Total = sw.ElapsedMilliseconds;float nouseJS_Average = ((float)sw.ElapsedMilliseconds) / 1000000;string msg = "";msg += string.Format("useJS_Total: {0}\r\n", useJS_Total);msg += string.Format("useJS_Average: {0}\r\n\r\n\r\n", useJS_Average);msg += string.Format("nouseJS_Total: {0}\r\n", nouseJS_Total);msg += string.Format("nouseJS_Average: {0}\r\n\r\n\r\n", nouseJS_Average);MessageBox.Show(msg);}}