DropDownList绑定数据的问题？谢谢
错误：
System.ArgumentOutOfRangeException: 指定的参数已超出有效值的范围。参数名: value

数据返回的是DataSet
以下绑定代码
this.dl_stair_params_name.DataSource = bll.GetList(strWhere);
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataBind();

如何解决问题？？谢谢

[解决办法]
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataTextField = "Parameter_Name ";

老兄，第二个应该是DataValueField吧？
[解决办法]
是啊 应该是DataValueField吧
[解决办法]
兄弟，是不是没有数据啊。
[解决办法]
绑定前
this.dl_stair_params_name.selectedindex = -1;

[解决办法]
感觉 你是不是没清空参数啊 scmd.Parameters.Clear();
[解决办法]
这样试试:
DataSet st = bll.GetList(strWhere);
this.dl_stair_params_name.DataSource = st.Tables[0].DefaultView;
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataBind();
[解决办法]
把其中的一个DataTextField 改为DataValueField
可能是你在绑定具体的值时发生了错误
[解决办法]
DataTable dt = bll.GetList(strWhere);
this.dl_stair_params_name.DataSource = st.Tables[0].DefaultView;
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataValueField = "Parameter_id ";
this.dl_stair_params_name.DataBind();

[解决办法]
DataTable dt = bll.GetList(strWhere);
this.dl_stair_params_name.DataSource = dt.DefaultView;
this.dl_stair_params_name.DataTextField = "Parameter_Name ";
this.dl_stair_params_name.DataValueField = "Parameter_id ";
this.dl_stair_params_name.DataBind();