两个combobox绊定同一datatable 如何实现一combobox选择改变而另一combobox不联动

[tmd456]

如题

[ericzhangbo1982111]

用
datatable dt=数据源.Clone()
把数据库克隆一份
然后分别绑定

[蓝海D鱼]

            DataTable mytable = getDataTable();
            this.comboBox1.DataSource = mytable;
            this.comboBox1.DisplayMember = "LastName";//字段名   
            this.comboBox1.ValueMember = "FirstName";//字段名  
            DataTable thistable = mytable.Copy();   //copy 一个 table
            this.comboBox2.DataSource = thistable;
            this.comboBox2.DisplayMember = "LastName";//字段名   
            this.comboBox2.ValueMember = "FirstName";//字段名