DropDownList ddl = new DropDownList(); //具體添加的操作 ddl.Items.Clear(); ddl.ID = "ddl" + id; ddl.Items.Add(new ListItem("-" + name + "-", id)); PlaceHolder1.Controls.Add(ddl); int sonparentid = int.Parse(id); BindDrpNode(sonparentid, dt, ddl); } } private void Bind...
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