确认脚本中的Java脚本IIF
在我的服务器端页面上,我有一段遗留脚本,我想在打开确认窗口之前修改它以测试字段是否为空。这就是我尝试的,添加$(#hdfldRecId),因为如果此字段为空,我不希望打开确认确认脚本中的Java脚本IIF,java,javascript,vb.net,Java,Javascript,Vb.net,在我的服务器端页面上,我有一段遗留脚本,我想在打开确认窗口之前修改它以测试字段是否为空。这就是我尝试的,添加$(#hdfldRecId),因为如果此字段为空,我不希望打开确认 scriptBlock = "function beforeDelete()" & vbCrLf & _ "{return($('#hdfldRecId').val() !> '' && confirm('Are you sure y
scriptBlock = "function beforeDelete()" & vbCrLf & _
"{return($('#hdfldRecId').val() !> '' && confirm('Are you sure you want to delete this item?'));}"
If (Not ClientScript.IsClientScriptBlockRegistered("deletePromptScript")) Then
ClientScript.RegisterClientScriptBlock(Me.GetType(), _
"deletePromptScript", _
scriptBlock, _
True)
End If
'use the OnClientClick property of the button to cause the above
'script to be executed when the button is clicked
btndelete.OnClientClick = "return(beforeDelete());"
当我执行页面时,调试指示()缺失,但所有配对都匹配
<script type="text/javascript">
//<![CDATA[
function beforeDelete()
{return($('#hdfldRecId').val() !> '' && confirm('Are you sure you want to delete this item?'));}//]]>
</script>
//''&&confirm('您确定要删除此项目吗?');}/]>
因此,我不确定如何添加此测试,以查看$(hdfldRecId)中是否有值,以及是否有值,然后执行确认对话框
谢谢返回不是一种方法,所以请摆脱(和) 不知道是什么!>应该是。猜猜你想检查长度
function beforeDelete() {
return $('#hdfldRecId').val().length && confirm('Are you sure you want to delete this item?');
}
您是否尝试过:
btndelete.OnClientClick = "beforeDelete;"
或者实际上:
btndelete.OnClientClick = "return beforeDelete();"
以及修复epascarello指出的打字错误。return不是一种方法,所以请去掉(and)
“return beforeDelete();”
我看到在“vbCrLf&”这是什么?@patricK这是VB的惯例,表示代码在下一行继续(因为VB的表达式结束符是换行符)。
btndelete.OnClientClick = "return beforeDelete();"