选择取决于其他选择 [英] Selection Dependent On Other Selection

问题描述

嘿.

因此，我希望用户选择一个客户.例如ABSA银行.然后选择一个分支.根据他们选择的客户.他们只会是他们可以选择的某些分支.一旦他们做到了.他们将在分支机构中选择一个联系人.再次取决于他们选择了哪个分支.这是下拉菜单的代码.

Hey there.

So I want a user to select a customer. Eg ABSA bank. Then select a Branch. Depending on which customer they select. Their will only be certain branches they can select from. Once they have done this. They will select a contact at the branch. Again depending on which branch they selected. Here is the code for the drop down.

<td>
                        Customer:
                    </td>
                    <td>
                        <asp:dropdownlist id="CustomerdD" runat="server" datatextfield="CustomerName" datavaluefield="CustomerID" xmlns:asp="#unknown">
                            DataSourceID="LinqDataSourceCustomers"&gt;
                            <asp:listitem selected="True" value="-1"></asp:listitem>
                        </asp:dropdownlist>
                    </td>
                
                <tr>
                    <td>
                        Branch:
                    </td>
                    <td>
                        <asp:dropdownlist id="BranchdD" runat="server" datatextfield="BranchName" datavaluefield="BranchID" xmlns:asp="#unknown">
                            DataSourceID="LinqDataSourceBranches"&gt;
                            <asp:listitem></asp:listitem>
                        </asp:dropdownlist>
                    </td>
                </tr>
                <tr>
                    <td>
                        Contact:
                    </td>
                    <td>
                        <asp:dropdownlist id="ContactdD" runat="server" datatextfield="Name" datavaluefield="ContactID" xmlns:asp="#unknown">
                            DataSourceID="LinqDataSourceContacts"&gt;
                            <asp:listitem></asp:listitem>
                        </asp:dropdownlist>
                    </td>

但后来我不确定该怎么做....任何帮助或链接将不胜感激.
:)
Thanks

But then I''m not sure what to do.... Any help or links would be appreciated.
:)
thanks

推荐答案

是否存在执行相同操作的问题?为此，您需要具有级联下拉列表功能.使用Codeproject搜索或Google来获取示例.

Is there any issue doing the same? You need a cascading dropdown feature in order to do it. Use Codeproject search or Google to get examples.

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