<bdo id='dwtPs'></bdo><ul id='dwtPs'></ul>
  • <small id='dwtPs'></small><noframes id='dwtPs'>

      <legend id='dwtPs'><style id='dwtPs'><dir id='dwtPs'><q id='dwtPs'></q></dir></style></legend>

      <tfoot id='dwtPs'></tfoot>

        <i id='dwtPs'><tr id='dwtPs'><dt id='dwtPs'><q id='dwtPs'><span id='dwtPs'><b id='dwtPs'><form id='dwtPs'><ins id='dwtPs'></ins><ul id='dwtPs'></ul><sub id='dwtPs'></sub></form><legend id='dwtPs'></legend><bdo id='dwtPs'><pre id='dwtPs'><center id='dwtPs'></center></pre></bdo></b><th id='dwtPs'></th></span></q></dt></tr></i><div id='dwtPs'><tfoot id='dwtPs'></tfoot><dl id='dwtPs'><fieldset id='dwtPs'></fieldset></dl></div>
      1. 如何只允许在 TextBox 中输入 0 或 1?

        时间:2023-06-09

          <small id='TUy72'></small><noframes id='TUy72'>

          <i id='TUy72'><tr id='TUy72'><dt id='TUy72'><q id='TUy72'><span id='TUy72'><b id='TUy72'><form id='TUy72'><ins id='TUy72'></ins><ul id='TUy72'></ul><sub id='TUy72'></sub></form><legend id='TUy72'></legend><bdo id='TUy72'><pre id='TUy72'><center id='TUy72'></center></pre></bdo></b><th id='TUy72'></th></span></q></dt></tr></i><div id='TUy72'><tfoot id='TUy72'></tfoot><dl id='TUy72'><fieldset id='TUy72'></fieldset></dl></div>
          • <bdo id='TUy72'></bdo><ul id='TUy72'></ul>
          • <legend id='TUy72'><style id='TUy72'><dir id='TUy72'><q id='TUy72'></q></dir></style></legend>
          • <tfoot id='TUy72'></tfoot>

                <tbody id='TUy72'></tbody>

                  本文介绍了如何只允许在 TextBox 中输入 0 或 1?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                  问题描述

                  如何将 TextBox 控件限制为仅允许值 0 和 1?

                  How can I limit the TextBox control to only allow the values 0 and 1?

                  谢谢.我还有一个问题:如何禁用将剪贴板中的文本放入我的文本框控件?

                  Thanks. And I have one more question: How can I disable put text from clipboard in my textbox control?

                  推荐答案

                  通过使用事件KeyPress

                  private void NumericOnlyKeyBox_KeyPress(object sender, KeyPressEventArgs e)
                  {
                      var validKeys = new[] { Keys.Back, Keys.D0, Keys.D1 };
                  
                      e.Handled = !validKeys.Contains((Keys)e.KeyChar);
                  }
                  

                  e.Handled 设置为 true/false 表示该字符是否应该被框接受.

                  Setting e.Handled to true / false indicates if the character should be accepted to the box or not.

                  您可以阅读更多关于 KeyPressEventArgs 在 MSDN 上.

                  You can read more about KeyPressEventArgs on MSDN.

                  注意

                  Keys.Delete 应涵盖 Keys.Delete、Keys.Backspace 和其他返回"按钮.

                  Keys.Delete should cover Keys.Delete, Keys.Backspace and other "Back" buttons.

                  这篇关于如何只允许在 TextBox 中输入 0 或 1?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

                  上一篇:带有“新行"的文本框 下一篇:如何读取文本框中的最后一行?

                  相关文章

                • <tfoot id='1tZS0'></tfoot>
                  <legend id='1tZS0'><style id='1tZS0'><dir id='1tZS0'><q id='1tZS0'></q></dir></style></legend>

                  1. <small id='1tZS0'></small><noframes id='1tZS0'>

                      <bdo id='1tZS0'></bdo><ul id='1tZS0'></ul>

                    <i id='1tZS0'><tr id='1tZS0'><dt id='1tZS0'><q id='1tZS0'><span id='1tZS0'><b id='1tZS0'><form id='1tZS0'><ins id='1tZS0'></ins><ul id='1tZS0'></ul><sub id='1tZS0'></sub></form><legend id='1tZS0'></legend><bdo id='1tZS0'><pre id='1tZS0'><center id='1tZS0'></center></pre></bdo></b><th id='1tZS0'></th></span></q></dt></tr></i><div id='1tZS0'><tfoot id='1tZS0'></tfoot><dl id='1tZS0'><fieldset id='1tZS0'></fieldset></dl></div>