CheckedListBox与下拉框联动代码

private void yewubind(string id)
{
//给业务类型下拉框绑定业务类型数据
DataTable dtyewu = sb.SelectLast(id, 0);
bool flag = false;
foreach (Control con in panel1.Controls)
{
if (con.Name == id)
{
con.Visible = true;
flag = true;
if (dtyewu.Rows.Count > 0)
{ }
else
{
((CheckedListBox)con).DataSource = null;
}
}
else
{
con.Visible = false;
} }
if (!flag)
{
CheckedListBox clb_yewu = new CheckedListBox();
clb_yewu.Name = id;
clb_yewu.Visible = true;
if (dtyewu.Rows.Count > 0)
{
clb_yewu.DataSource = dtyewu;
clb_yewu.DisplayMember = "name";
clb_yewu.ValueMember = "id";
}
Size ss = new Size(200, 100);
clb_yewu.Size = ss;
panel1.Controls.Add(clb_yewu); } } private void cbb_jrh_SelectedIndexChanged(object sender, EventArgs e)
{
yewubind(cbb_jrh.SelectedValue.ToString()); }

DataTable dtjrh = sb.SelectSyscode(2, true);
if (dtjrh.Rows.Count > 0)
{
cbb_jrh.DataSource = dtjrh;
cbb_jrh.DisplayMember = "name";
cbb_jrh.ValueMember = "id";
this.cbb_jrh.SelectedIndex = 0;
}
yewubind(cbb_jrh.SelectedValue.ToString());

foreach (Control c in panel1.Controls)
{
foreach (DataRowView dr in ((CheckedListBox)c).CheckedItems)
{
yewuid += dr["id"].ToString() + ";";
}
}

panel1.Controls.Clear();
this.cbb_jrh.SelectedIndex = 0;