javascript - 将变量放入return中确认()

Question

我有一个按钮

<asp:Button ID="btnPresent" runat="server" OnClientClick="return confirm('N student Absent?');"  />

我想用一个服务器端变量(lstAbsent.Count)替换这个“N”

我已经尝试过

<asp:Button ID="btnPresent" runat="server" OnClientClick="return confirm("+lstAbsent.Count+" student Absent?');"  />

和

<asp:Button ID="btnPresent" runat="server" OnClientClick="return confirm(''"+lstAbsent.Count+"' student Absent?');"  />

但它不起作用......我缺少什么？

Answer 1

你可以像这样定义一个 JS 函数:-

 function confirmStudentsMsg()
 {
     var studentsAbsent = '<%= lstAbsent.Count %>';
     return confirm(studentsAbsent + ' student(s) absent?');
 }

然后，只需单击按钮即可调用它:-

<asp:Button ID="btnPresent" runat="server" OnClientClick="return confirmStudentsMsg();" />