一个 正则匹配的问题

Question

帮忙看下winform textbox1里有一下内容：<table border="0" cellpadding="0" cellspacing="0" style="width: 100%">
    <tr>
        <td colspan="6">
            录入</td>
    </tr>
    <tr>
        <td>
          sadf </td>
        <td>
            <asp:TextBox ID="txtname" runat="server"></asp:TextBox></td>
        <td>
            twe4rtd>
        <td>
            <asp:RadioButtonList ID="Radiosex" runat="server" RepeatColumns="2" Width="88px">
                <asp:ListItem Selected="True">男</asp:ListItem>
                <asp:ListItem>女</asp:ListItem>
            </asp:RadioButtonList>
            </td>
        <td>
            dsf</td>
        <td>
            <asp:TextBox ID="txtname1" runat="server"></asp:TextBox></td>
    </tr>
    <tr>
        <td>
            <asp:Label ID="lblname2" runat="server" Text="424sfd"></asp:Label></td>
        <td>
            <asp:TextBox ID="txtname2" runat="server"></asp:TextBox></td>
        <td>
            <asp:Label ID="lblzname" runat="server" Text="sdfsd"></asp:Label></td>
        <td>
            <asp:TextBox ID="txtzname" runat="server"></asp:TextBox></td>
        <td>
            <asp:Label ID="lblcardid" runat="server" Text="身份证号"></asp:Label></td>
        <td>
            <asp:TextBox ID="txtcardid" runat="server"></asp:TextBox></td>
    </tr>
   <tr>
        <td>
            <asp:Label ID="lblcountry" runat="server" Text="43"></asp:Label></td>
        <td>
            <asp:TextBox ID="txtcountry" runat="server"></asp:TextBox></td>
        <td>
            sfasadf</td>
        <td>
            <asp:TextBox ID="txtprovince" runat="server"></asp:TextBox></td>
        <td>
           </td>
        <td>
            <asp:TextBox ID="txtcity" runat="server"></asp:TextBox></td>
    </tr>    <tr>
        <td>
            <asp:Label ID="lbljuweihui" runat="server" Text="34234"></asp:Label></td>
        <td>
            <asp:TextBox ID="txtjuweihui" runat="server"></asp:TextBox></td>
        <td>
            <asp:Label ID="lblhujiaddress" runat="server" Text="yijuyfgh"></asp:Label></td>
        <td colspan="3">
            <asp:TextBox ID="txthujiaddress" runat="server"></asp:TextBox></td>
    </tr>
   </table>
我要获取所有<asp:TextBox>标签的id 用这则怎么写
高手帮帮忙，正则还是不太会

Answer 1

  Regex reg=new Regex(@"<asp:TextBox ID="(?<txtID>[^\"]+)?"[\w\W]+?>");

Answer 2

Regex re = new Regex(@"(?<=<asp:TextBox\s*ID=\")[^\"]*");

Answer 3

Regex reg=new Regex(@"<asp:TextBox ID=\"(?<txtID>[^\"]+)?\"[\w\W]+?>");

Answer 4

@"<asp:TextBox ID=\"(?<txtID>[^\"]+)?\"[\w\W]+?>"到括号那儿有错误