小白问题,关于如何激发验证?

<asp:Button ID="oopid" runat="server" class="button" Text="提　交" OnClick="val_num(this)" OnServerClick="btnAdd_Click" />

解决方案 »

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OnClick=val_num(传入要验证控件)
要看你的提交事件里怎么写的了
一般这样加进去myNum_field = document.myForm.myNum_field.value
if (field.value=="")
  {
  alert("错误！请输入正确数字！");
  field.focus();
  field.select();
  return false;
  }
出错:
“ASP.test_aspx”并不包含“val_num”的定义
用html控件不会出错,用服务器控件就出现错误.
那你就用html控件，一样的啊
<input type="button" ID="oopid" runat="server" class="button" value="提　交"
onClick="val_num(this)" OnServerClick="btnAdd_Click" />
1.用HTML控件是OK的!
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>test</title>
</head>
<script language="javascript">
function val_num() {
  if (field.value=="")
  {
  alert("错误！请输入正确数字！");
  field.focus();
  field.select();
  return false;
  }
}
</script> <body>
    <input id="Text1" name="field" type="text" />
    <input id="Button1" type="button" value="button" onclick="val_num()" />
</body>
</html>2.换成服务器控件怎么写呢?
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<script language="javascript">
function val_num() {
  if (field.value=="")
  {
  alert("错误！请输入正确数字！");
  field.focus();
  field.select();
  return false;
  }
}
</script> <body>
    <form id="form1" runat="server">
    <div>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:Button ID="Button1" runat="server" Text="Button" OnClick="Button1_Click" /></div>
    </form>
</body>
</html>