List<KeyValuePair<object, string>> dit = new List<KeyValuePair<object, string>>();

            dit.Add(new KeyValuePair<object, string>(1, "测试操作类型"));

            dit.Add(new KeyValuePair<object, string>(2, "操作类型"));

           

            this.cbxMethod.DataSource = dit;

            this.cbxMethod.DisplayMember = "Value";

            this.cbxMethod.ValueMember = "Key";