我需要用户选择组合框，然后才能保存或执行任何其他操作. [英] i need the user to select combobox before he can save or do any other operations.

问题描述

我的内容页面上有一个组合框.

我想对组合框使用验证并将其结果作为布尔值发送到我的母版页，因为我在母版页上有一个返回类型为bool的方法.

我需要用户选择组合框，然后才能保存或执行任何其他操作.

我在网上搜索，但没有很好的例子.

I have a combobox in my content page.

I want to use validation for combobox & send its result as boolean to my master page because I have a method on master page which returns type as bool.

I need the user to select combobox before he can save or do any other operations.

I searched the net but didn''t get good examples.

推荐答案

如果可能，请使用RequiredFieldValidator.在其他情况下，您可以配置和使用CustomValidator，因为您自己编写验证逻辑，所以更灵活.

Use RequiredFieldValidator if it''s possible. In other cases you can configure and use CustomValidator which is more flexible cause you write your validation logic yourself.

尝试此

try this

<asp:RequiredFieldValidator ID="rfv_Users" ControlToValidate="ddl_UserList" runat="server" ErrorMessage="Country"

                                    SetFocusOnError="true" InitialValue="Select" Display="dynamic">*</asp:RequiredFieldValidator>

给您的下拉列表0索引值作为选择

dropdown.items.insert(0，"Select");

give your dropdown 0 index value as select

dropdown.items.insert(0,"Select");

这篇关于我需要用户选择组合框，然后才能保存或执行任何其他操作.的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！