如何在vb.net中使用javascript清除标签. [英] how to clear a label with javascript in vb.net.

问题描述

我的代码是:

My Code is:

<script type="text/javascript">
  function clear(){
     var labelObj = document.getElementById("<%= lbler.ClientID %>");

if (labelObj.innerHTML !="")
{
    labelObj .innerHTML="";
   }

  }
</script>

When label is Null initially ,then javascript throws an error Null or object already Null
how to prevent this error

推荐答案

您仅应在页面加载时调用Clear()方法.
从该错误看来，该代码似乎是在页面加载期间被调用的，而这本来就不会发生.

You should call the Clear() method only when the page loads.
From the error, it looks like the code is called during page load which should not happen in the first place.

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