asp.net - 页面中只能添加一个 ScriptManager 实例

Question

“只能将 ScriptManager 的一个实例添加到页面中。”当我将脚本管理器添加到 AJAX 工具包的密码强度时出现此错误。

我在我的 createuserwizard 的密码字段旁边添加了密码强度。 当这是我网站中唯一的脚本管理器时，为什么会出现此错误？

代码如下:

 <asp:TextBox runat="server" ID="Password" TextMode="Password" MaxLength="20" />
<asp:ScriptManager ID="ScriptManager2" runat="server">
</asp:ScriptManager>
 <asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate> 
 <asp:PasswordStrength ID="Password_PasswordStrength" runat="server" 
                                Enabled="True" TargetControlID="Password"   DisplayPosition="RightSide"
                             StrengthIndicatorType="BarIndicator"
                              BarBorderCssClass="barBorder"
                               BarIndicatorCssClass="barInternal">
                         </asp:PasswordStrength>

                            <asp:RequiredFieldValidator runat="server" ID="RequiredFieldValidator10" ControlToValidate="Password" 
                                ErrorMessage="Password is required." />   
      </ContentTemplate> </asp:UpdatePanel> 
                        </td>
                    </tr>

Answer 1

只要删除这个 ScriptManager，它就可以正常工作了。

<asp:ScriptManager ID="ScriptManager2" runat="server">
</asp:ScriptManager>

您肯定在页面或 MasterPage 的其他位置添加了 ScriptManager。

ScriptManager Control Overview

Only one instance of the ScriptManager control can be added to the page. The page can include the control directly, or indirectly inside a nested component such as a user control, content page for a master page, or nested master page. If a page already contains a ScriptManager control, but a nested or parent component needs additional features of the ScriptManager control, the component can include a ScriptManagerProxy control. For example, the ScriptManagerProxy control enables you to add scripts and services that are specific to nested components.