验证图片

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>无标题页</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:FileUpload ID="FileUpload1" runat="server" />
        <asp:Button ID="Button1" runat="server" OnClick="Button1_Click" Text="Button" />
    <input type="file" lang="de" />&nbsp;
        <asp:CustomValidator ID="CustomValidator1" runat="server" ControlToValidate="FileUpload1"
            ErrorMessage="CustomValidator" ClientValidationFunction="clientValidate"></asp:CustomValidator></div>
    </form>
    <script type="text/javascript">
    function clientValidate(source,arguments){
        var rgx=/(jpg|gif|bmp)/i;
        var sFilePath=document.getElementById("<%=FileUpload1.ClientID %>").value;
        var ext=sFilePath.substring(sFilePath.lastIndexOf(".")+1);
        arguments.IsValid=rgx.test(ext);
    }
    </script>
</body>
</html>
posted @ 2013-05-30 15:23  tmacxzh  阅读(143)  评论(0)    收藏  举报