界面上的内容
1 <asp:DropDownList ID="company" runat="server" AppendDataBoundItems=true> 2 <asp:ListItem Selected="true">-请选择-</asp:ListItem> 3 </asp:DropDownList>
后台代码
1 for (int i = company.Items.Count - 1; i > 0; i--) 2 { 3 company.Items.RemoveAt(i); 4 } 5 this.company.DataSource = ds_company; 6 this.company.DataValueField = "department_no"; 7 this.company.DataTextField = "department_name"; 8 this.company.DataBind();
解析:
1.下拉列表中要添加 AppendDataBoundItems=true 属性
或者:
this.company.DataSource = ds_company; this.company.DataValueField = "department_no"; this.company.DataTextField = "department_name"; this.company.DataBind(); this.company.Items.Add(new ListItem("请选择", "000000000")); this.company.SelectedValue = "000000000";