通过javascript从内容页面访问母版页控件 [英] Accessing master page control from content page through javascript

问题描述

大家好，

有人可以告诉我如何通过javascript访问内容页面中的母版页控件吗?

我有一些代码如下.

Hi All,

Could somebody please tell me how do i access the master page control in content page through javascript?

I have got some code as follows.

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs)
            Dim tb As TextBox = CType(Master.FindControl("txtMaster"), TextBox)
            Dim val As String = tb.ClientID
            Dim script As String = "<script>" & ControlChars.CrLf & "        function PopulateMaster() {" & ControlChars.CrLf & "            document.getElementById(''" & val & "'').value = ''Via Content Page.;                " & ControlChars.CrLf & "        }" & ControlChars.CrLf & "        PopulateMaster();" & ControlChars.CrLf & "        </script>"
            If (Not Page.ClientScript.IsStartupScriptRegistered("Mast")) Then
                  Page.ClientScript.RegisterStartupScript(Me.GetType(), "Mast", script)
            End If
 
   End Sub

这里的问题是我不想从后面的代码中调用javascript，我想从aspx页面中调用它，并且我想基于内容页面中客户端的一些单击来更改放置在母版页中的标签的文本.

有人可以帮我吗！

最好的问候，
Snigdha

The problem here is I do not want to call the javascript from code behind, I want to call it from aspx page and i want to change the text of a label placed in master page, based on some clicks in client side in content page.

Could somebody help me!!

Best Regards,
Snigdha

推荐答案

也可以有其他方法，但最简单的方法是:
1.运行应用程序.
2.转到所需的页面.
3.做一个查看源代码"
4.查找母版页控件名称.
5.在ASPX javascript中使用该名称.

There can be other ways too, but easiest would be:
1. Run the application.
2. Go to the desired page.
3. Do a ''View Source''
4. Find the Master page control name.
5. Use that name in your ASPX javascript.

我建​​议您为控件提供一个唯一的CSS类，然后使用document.getElementsByClassName从内容页面中找到该控件.
https://developer.mozilla.org/en/dom/document.getelementsbyclassname [ ^ ]
http://robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/ [ ^ ]

I will suggest you to provide a unique css class to the control, then find the control from content page with document.getElementsByClassName.
https://developer.mozilla.org/en/dom/document.getelementsbyclassname[^]
http://robertnyman.com/2005/11/07/the-ultimate-getelementsbyclassname/[^]

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