“内容"页面上使用的主控件 [英] Master control used on Content page

问题描述

你好，
我喜欢您关于内部母版页"的文章.现在，我可以隐藏用于菜单的面板.

我的问题是我已经在主数据库上放置了一个下拉列表，当我进行更改时，我希望根据我所在的页面来进行特定的处理.

这也是下拉列表在那里时我在内容页面上拥有的代码.

Hello,
I loved your article about "Inside Master Page". I now can hide a panel that I use for a menu.

My question is that I have placed a dropdownlist on the master and when I make a change, I want specific things to occur depending on the page that I am on.

Here is the code that I use to have on the content page when the dropdownlist was there as well.

 Protected Sub ddlPrintGroup_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlPrintGroup.SelectedIndexChanged
        On Error GoTo sub_error
        Dim strSub As String
        strSub = "ddlPrintGroup_SelectedIndexChanged"
        ''================================================================================
        myddlLocs.SelectedIndex = -1
        PreviewReport()
        ''================================================================================
sub_exit:
        Exit Sub
sub_error:
        If mytxtMsg.Text = "" Then
            mytxtMsg.Text = "Error in Sub " & strSub & " - " & Err.Number & " : " & Err.Description
        End If
        mytxtMsg.Visible = True
    End Sub

我在类的顶部添加了一个名为以下内​​容的变量:

I have added a variable called the following at the top of the class:

Public myddlPrintGroup As DropDownList

在Page_Init中，我有以下内容:

In the Page_Init, I have the following:

myddlPrintGroup = CType(myMaster.FindControl("ddlPrintGroup"), DropDownList)

如何获取子例程ddlPrintGroup_SelectedIndexChanged来查看母版页上的myddlPrintGroup?

谢谢！
Eddi Rae

How do I get the subroutine ddlPrintGroup_SelectedIndexChanged to look at the myddlPrintGroup that is on the master page?

Thanks!
Eddi Rae

推荐答案

写道:​​

我喜欢您关于内部母版页"的文章".

I loved your article about "Inside Master Page".

如果您想与文章作者交谈，文章下方有一个论坛.

使用委托在您编写的每个页面中挂接事件.

If you want to talk to an article author, there''s a forum under the article.

Use a delegate to hook the event up in each page that you write.

写道:​​

myddlPrintGroup = CType(myMaster.FindControl("ddlPrintGroup")，DropDownList)

myddlPrintGroup = CType(myMaster.FindControl("ddlPrintGroup"), DropDownList)

您应该提供一个自定义的基类，而不是像这样的讨厌的代码，该基类强烈地在属性中键入母版，然后可以在其上公开诸如委托和属性之类的东西.

Instead of nasty code like this, you should provide a custom base page class, which strongly types your master page in a property, then you can expose things like delegates and properties on it.

这篇关于“内容"页面上使用的主控件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！