DropDownList list = this.findContol("aas") as DropDownList;list.DataSource = new DataTable() ------------------------------- Control ctl = this.FindControl("NAME"); if (ctl != null) { if (ctl is Dro
在运行期间,ListBox控件突然消失,同时给出如下错误提示: Warning: single-selection listbox control requires that Value be an integer within String rangeControl will not be rendered until all of its parameter values are valid 此错误经常出现在清空List之后.原因在于,List的Value属性指示当前选中的列表项序号,如果超