ASP.NET实现License Key输入功能的小例子

这个演示，在输入时，是不需要与服务端交互，只有全部输入完毕之后，用户点铵钮才进行验证。因此在这里，写Javascript来实现即可。

js:

复制代码 代码如下:

<script type="text/javascript">
        function JumpToNextTextBox(currentTxtBox, nextTextBoxID) {
            if (currentTxtBox.value.length >= 5) {
                document.getElementById(nextTextBoxID).focus();
            }
        }
    </script>

Html code:

复制代码 代码如下:

  License Key:
            <asp:TextBox runat="server" onkeyup="JumpToNextTextBox(this, 'Number2')"></asp:TextBox>
            -
        <asp:TextBox runat="server" onkeyup="JumpToNextTextBox(this, 'Number3')"></asp:TextBox>
            -
        <asp:TextBox runat="server" onkeyup="JumpToNextTextBox(this, 'Number4')"></asp:TextBox>
            -
        <asp:TextBox runat="server" onkeyup="JumpToNextTextBox(this, 'Number5')"></asp:TextBox>
            -
        <asp:TextBox runat="server" MaxLength ="5"></asp:TextBox>