winformcomcobox赋值问题

当使用SelectedIndexChanged时，ValueMember在DataSource前进行赋值，

comcobox.ValueMember = "value";

comcobox.DisplayMember = "name";

comcobox.DataSource = dt1;

当使用SelectedValueChanged时，ValueMember在DataSource后进行赋值。

comcobox.DataSource = dt1;

comcobox.ValueMember = "value";

comcobox.DisplayMember = "name";