javascript 如何防止javascript回发
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how to prevent postback by javascript
提问by Nishant Kumar
actually this code is working well in firefox mozilla but it's not working in IE8
实际上，这段代码在 firefox mozilla 中运行良好，但在 IE8 中不起作用
<asp:Button ID="btnSubmit" runat="server" Text="Submit" CssClass="btnPrimary" OnClientClick="return doSubmit('this');"
OnClick="btnSubmit_Click" />
<script type="text/javascript">
function doSubmit()
{
var ansLength = oDOM.body.innerText.trim().length;
if (ansLength == 0 && smielyPresent == -1)
{
alert("you cannot submit blank answer");
return false;
}
}
</script>
protected void btnSubmit_Click(object sender, EventArgs e)
{
// i am doing some stuff
}
here i want to prevent postback when answerlength == 0 ;but when answer length ==0then it alert alert("u can't submit blank answer")message and postback to server io want to prevent it how i do ?
在这里，我想在什么answerlength == 0 ;时候阻止回发，但是什么时候answer length ==0它会alert("u can't submit blank answer")发出警报 消息并回发到服务器 io 想要阻止它，我该怎么办？
采纳答案by jgauffin
It's not working since you have a script error in your javascript.
它不起作用，因为您的 javascript 中有脚本错误。
<script type="text/javascript">
function doSubmit()
{
//I've removed the first equal sign
var ansLength = oDOM.body.innerText.trim().length;
if (ansLength == 0 && smielyPresent == -1) //typo on smielyPresent ?
{
alert("u can't submit blank answer")
return false;
}
}
</script>
回答by shashi
try this
试试这个
OnClientClick="doSubmit(this); return false;"
