updatepanl&&dropdownlist

Question

点击 button 重新从数据库取值赋给 updatepanl 里的 dropdownlist

Answer 1

在button1_click()中,从数据库中获得数据
DropDownLis1.Items.Clear();
DropDownListTeam.DataSource = 获得的数据;
//DropDownListTeam.DataValueField = "Name";
//DropDownListTeam.DataTextField = "Name";
DropDownListTeam.DataBind();

Answer 2

我也这样但是
updatepanl 里的 dropdownlist否不刷新

Answer 3

怎么使用的
   <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
    <div>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
               <asp:DropDownList ID="ddl" runat="server" Width="15%" AutoPostBack="True" OnSelectedIndexChanged="ddl_SelectedIndexChanged">
               </asp:DropDownList>
                 </ContentTemplate>
        </asp:UpdatePanel>
        </div> 
还可
<asp:DropDownList ID="ddl" runat="server" Width="150px" onchange="ddlChange(this);">
</asp:DropDownList>  

Answer 4

button1_click()中,从数据库中获得数据DropDownListTeam.DataSource = 获得的数据;
DropDownListTeam.DataValueField = "值字段";
DropDownListTeam.DataTextField = "显示字段";
DropDownListTeam.DataBind();

Answer 5

 <asp:ScriptManager ID="ScriptManager1" runat="server">
  </asp:ScriptManager>
  <div>
  <asp:UpdatePanel ID="UpdatePanel1" runat="server">
  <ContentTemplate>
  <asp:DropDownList ID="ddl" runat="server" Width="15%" AutoPostBack="True" OnSelectedIndexChanged="ddl_SelectedIndexChanged">
  </asp:DropDownList>
  </ContentTemplate>
  </asp:UpdatePanel>
  </div> 
点击button 后重新给dropdownlist 赋值就不行了
button 在UpdatePane外

Answer 6

button 在UpdatePane外
定义UpdatePanel的异步刷新触发器为button的单击事件，这样就ok了

Answer 7

button 在UpdatePane外
定义UpdatePanel的异步刷新触发器为button的单击事件
但是dropdownlist不能重新取值，不知怎么搞的

Answer 8

<asp:ScriptManager ID="ScriptManager1" runat="server" />
        <div>
            <asp:UpdatePanel ID="UpdatePanel1" runat="server">
                <ContentTemplate>
                    <asp:DropDownList ID="ddl" runat="server" Width="15%" AutoPostBack="True" OnSelectedIndexChanged="ddl_SelectedIndexChanged">
                    </asp:DropDownList>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="btnSub" EventName="Click" />
                </Triggers>
            </asp:UpdatePanel>
            <asp:Button ID="btnSub" runat="server" OnClick="btnSub_Click" />
        </div>正解！！！

Answer 9

检查dropdownlist的属性Autopostback值是否为true,不知道这样行不行，楼主试试吧！我也是新手！

Answer 10

<asp:AsyncPostBackTrigger ControlID="btnSub" EventName="Click" />
这个也用了但就刷新不了，救急