计算器,单击数字按钮,将数字显示在文本框result中,点clear按钮清除文本框内容,报错System.FormatException: Input string was not in a correct format<%@page language="vb"%>
<script runat="server">
sub express(ob as object,ev as eventargs)
select case ob.text
case 1,2,3,4,5,6,7,8,9,0
result.text=result.text & ob.text
case "clear"
result.text="" “报错。。end select
end sub
</script>
<html>
<body>
<form runat="server">
<table border=1>
<tr><td colspan="4"><asp:textbox text="" id="result" runat="server"/></td></tr>
<tr>
<td><asp:button onclick="express" text="1" runat="server"/></td>
<td><asp:button onclick="express" text="2" runat="server"/></td>
<td><asp:button onclick="express" text="3" runat="server"/></td>
<td><asp:button onclick="express" text="+" runat="server"/></td>
</tr>
<tr>
<td><asp:button onclick="express" text="4" runat="server"/></td>
<td><asp:button onclick="express" text="5" runat="server"/></td>
<td><asp:button onclick="express" text="6" runat="server"/></td>
<td><asp:button onclick="express" text="-" runat="server"/></td>
</tr>
<tr>
<td><asp:button onclick="express" text="7" runat="server"/></td>
<td><asp:button onclick="express" text="8" runat="server"/></td>
<td><asp:button onclick="express" text="9" runat="server"/></td>
<td><asp:button onclick="express" text="*" runat="server"/></td>
</tr>
<tr>
<td><asp:button onclick="express" text="0" runat="server"/></td>
<td><asp:button onclick="express" text="=" runat="server"/></td>
<td><asp:button onclick="express" text="/" runat="server"/></td>
<td><asp:button onclick="express" text="clear" runat="server"/></td>
</tr>
</table>
</form>
</body>
</html>
<script runat="server">
sub express(ob as object,ev as eventargs)
select case ob.text
case 1,2,3,4,5,6,7,8,9,0
result.text=result.text & ob.text
case "clear"
result.text="" “报错。。end select
end sub
</script>
<html>
<body>
<form runat="server">
<table border=1>
<tr><td colspan="4"><asp:textbox text="" id="result" runat="server"/></td></tr>
<tr>
<td><asp:button onclick="express" text="1" runat="server"/></td>
<td><asp:button onclick="express" text="2" runat="server"/></td>
<td><asp:button onclick="express" text="3" runat="server"/></td>
<td><asp:button onclick="express" text="+" runat="server"/></td>
</tr>
<tr>
<td><asp:button onclick="express" text="4" runat="server"/></td>
<td><asp:button onclick="express" text="5" runat="server"/></td>
<td><asp:button onclick="express" text="6" runat="server"/></td>
<td><asp:button onclick="express" text="-" runat="server"/></td>
</tr>
<tr>
<td><asp:button onclick="express" text="7" runat="server"/></td>
<td><asp:button onclick="express" text="8" runat="server"/></td>
<td><asp:button onclick="express" text="9" runat="server"/></td>
<td><asp:button onclick="express" text="*" runat="server"/></td>
</tr>
<tr>
<td><asp:button onclick="express" text="0" runat="server"/></td>
<td><asp:button onclick="express" text="=" runat="server"/></td>
<td><asp:button onclick="express" text="/" runat="server"/></td>
<td><asp:button onclick="express" text="clear" runat="server"/></td>
</tr>
</table>
</form>
</body>
</html>
解决方案 »
- 如何在listview中获取itemtemplate内的控件
- asp.net怎样仅在第一次打开时产生一随机数,以后刷新页面值都不变。
- QueryString传值问题
- 如何解决网通用户访问慢的问题?
- The file '/Default.aspx' has not been pre-compiled, and cannot be requested.
- 求解密 eval function ///2
- 求教高人;网络安全,加密揭密的问题。。
- vs2005调用存储过程出错
- 如何在转到另外的页面之前进行提示是否要保存
- TreeView中取得节点值时遇到问题!时间太紧了,请帮忙!
- URL重写之后,如何处理Gridview分页按钮实现URL重写后的地址调用??散尽分数,为此问题..................
- 关于money类型字段的问题?
Select Case ob.text
Case "1", "2", "3", "4", "5", "6", "7", "8", "9", "0"
result.Text = result.Text & ob.text
Case "clear"
result.Text = ""
End Select
End Sub