ASP.NET實現License Key輸入功能的小例子

這個演示，在輸入時，是不需要與服務端交互，只有全部輸入完畢之後，用戶點铵鈕才進行驗證。因此在這裡，寫Javascript來實現即可。

js:

復制代碼 代碼如下:

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

Html code:

復制代碼 代碼如下:

  License Key:
            <asp:TextBox ID="Number1" runat="server" onkeyup="JumpToNextTextBox(this, 'Number2')" Width="65"></asp:TextBox>
            -
        <asp:TextBox ID="Number2" runat="server" onkeyup="JumpToNextTextBox(this, 'Number3')" Width="65"></asp:TextBox>
            -
        <asp:TextBox ID="Number3" runat="server" onkeyup="JumpToNextTextBox(this, 'Number4')" Width="65"></asp:TextBox>
            -
        <asp:TextBox ID="Number4" runat="server" onkeyup="JumpToNextTextBox(this, 'Number5')" Width="65"></asp:TextBox>
            -
        <asp:TextBox ID="Number5" runat="server" MaxLength ="5" Width="65"></asp:TextBox>