无法检索隐藏字段值 [英] Trouble Retrieving Hidden Field Value

问题描述

你好，

这是我在主页上的代码背后的代码

受保护的 Sub Page_Load（ ByVal sender As < font color ="＃0000ff"size = 2>对象 ， ByVal e As System.EventArgs） 句柄 Me .Load
如果 HF_Country.Value = 没什么 然后
HF_Country.Value = 124
结束 如果
Page.ClientScript.RegisterClientScriptBlock（ < font color ="＃0000ff"size = 2> Me .GetType， " ClientScript" ， "< script type ='text / jscript'> function get_c（）{var c = this.document.getElementByID（'" & HF_Country.ClientID& "'）。value;国家（c）;}< / script>" ， False ）
结束 Sub

当页面加载相关的HTML时是

< script type ='text / jscript'> function get_c（）{ var c = 此 .document .getElementByID（ 'ctl00_HF_Country' ）。值;国家（c）;} < / script >

从上面生成的
和

Hello,

This is the code from my code behind on a masterpage

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If HF_Country.Value = Nothing Then
HF_Country.Value = 124
End If
Page.ClientScript.RegisterClientScriptBlock(Me.GetType, "ClientScript", "<script type='text/jscript'> function get_c() {var c = this.document.getElementByID('" & HF_Country.ClientID & "').value; Country(c);} </script>", False)
End Sub

When the page loads the relevant HTML is

<script type='text/jscript'> function get_c() {var c = this.document.getElementByID('ctl00_HF_Country').value; Country(c);} </script>

which is generated from the above
and

< 输入 type =" hidden" 名称 =" ctl00 $ HF_Country" id =" ctl00_HF_Country" value =" 124" />

哪个来自页面作为asp：hiddenfield

当页面加载时我得到一个

Microsoft JScript运行时错误：对象不支持这个属性或方法

请指教。

谢谢

迈克尔

<input type="hidden" name="ctl00$HF_Country" id="ctl00_HF_Country" value="124" />

which is from the page as an asp:hiddenfield

When the page loads I get an

Microsoft JScript runtime error: Object doesn't support this property or method

Please advise.

Thanks

Michael

推荐答案

你写错了.document.getElementByID。将其替换为document.getElementById

you wrote this.document.getElementByID wrong. replace it with document.getElementById

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