listbox的重新载入问题

[fuxiangxin]

用Listbox绑定了数据库代码如下：
SqlConnection con = new SqlConnection("Data Source=.;Initial Catalog=TestOnline;Integrated Security=True");

SqlDataAdapter da = new SqlDataAdapter("select DepName,DepID,DepAdminTeacherID from TblDepartment", con);
DataTable dt = new DataTable("DepTable");

dt = ds.Tables["DepTable"];

DataSet ds = new DataSet();
da.Fill(ds, "DepTable");
　　　　　　this.LstDep.DataSource = dt;
this.LstDep.DisplayMember = "DepName";
this.LstDep.ValueMember = "DepID";
想在新加入一条记录后即时的显示出来，但是试图用clear方法清除掉列表框里原有的记录再重新绑定时，提示“设置了datasource属性以后无法修改”
　谁能给我个意见啊？

[owennol]

用this.LstDep.DataSource = dt;
this.LstDep.DisplayMember = "DepName";
this.LstDep.ValueMember = "DepID";
绑定后，不能修改

建议用For循环加入Item

[wj0728]

晕死，告诉你一个好的方法，在数据绑定之前
this.LstDep.DataSource = null;
this.LstDep.DataSource = dt;
this.LstDep.DisplayMember = "DepName ";
this.LstDep.ValueMember = "DepID ";