隐藏标签-调用JavaScript服务器端 [英] Hide label - call javascript serverside

问题描述

我必须能够隐藏/取消隐藏标签客户端.该标签必须首先隐藏，并且我无法将Visible属性设置为false，因为随后从html中删除了该控件.我尝试通过调用javascript服务器端来加载页面时隐藏标签:

I must be able to hide/unhide a label clientside. The label must be hidden at first and I can''t set the Visible property to false because then the control is removed from html. I try to hide the label when a page is loaded by calling javascript serverside:

protected void Page_Unload(object sender, EventArgs e)
{
     //hide case number label
     this.Page.ClientScript.RegisterClientScriptBlock(typeof(string), "hidelabel", "<script language=javascript>$get(''" +
     "ContentPlaceHolder1_lblCase'').style.display = ''none'';</script>");
}

这是行不通的-没有任何反应.请告诉我我在做什么错.

This doesn''t work - nothing happens. Please tell me what I''m doing wrong.

推荐答案

get(''"+ " ContentPlaceHolder1_lblCase).style.display =``none'';</script>")); }

get(''" + "ContentPlaceHolder1_lblCase'').style.display = ''none'';</script>"); }

这是行不通的-没有任何反应.请告诉我我在做错什么.

This doesn''t work - nothing happens. Please tell me what I''m doing wrong.

仅设置CssClass [样式 [

It''s probably easier just to set the CssClass [^] or Style [^] properties of your label depending on some condition

Personally, I''d create a class in CSS called ''hidden'' like so.

.hidden
{
   display: none;
}

然后，直接将样式应用于标签HTML

Then, either apply the style to the label HTML directly

<asp:Label id="label1" 
            CssClass="hideen" 
            runat="server" />

...或根据某些先决条件在您的代码中应用

...or apply in your code based on some precondition

protected void Page_Load(object sender, EventArgs e)
{
    if (SomethingToTest) 
    {
        label1.CssClass = "hidden";
    }
}

ContentPlaceHolder1_lblCase最有可能是标签的服务器端名称.为了获取客户端ID，您必须调用ContentPlaceHolder1_lblCase.ClientId.看到这里:

ContentPlaceHolder1_lblCase is most likely the server side name of your label. In order to get the client side ID for it you''ll have to call ContentPlaceHolder1_lblCase.ClientId. See here:

protected void Page_Unload(object sender, EventArgs e)
{
     //hide case number label
     this.Page.ClientScript.RegisterClientScriptBlock(typeof(string), "hidelabel", "<script language="javascript">

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