问题描述
在我的 Textbox 上，使用 Keypressed 事件仅接受字母数字字符和下划线，但是当我右键单击文本框并粘贴特殊字符并接受它时遇到问题
On my Textbox only accepts Alphanumeric characters and a underscore using the Keypressed event but I am having problems when I right click on the textbox and pasted special characters and accepts it
有没有办法在点击粘贴之前从那里验证字符串?
Is there a way to validate the string from there before clicking paste?
任何答案都会有所帮助，谢谢！
Any answers will help thanks!
推荐答案
你可以
1- 禁用将禁用 Ctrl-C、Ctrl-V 和第二行的文本框的快捷方式(将分配一个空的上下文菜单，没有项目并将覆盖原始上下文菜单)并且不会出现上下文菜单(因为它没有项目):
1- Disable shortcuts for the textbox that would disable Ctrl-C, Ctrl-V, and the second line(will assign a empty context menu, with no items and will override the original context menu) and no context menu will appear (as it has no items):
textBox1.ShortcutsEnabled = false;
textBox1.ContextMenu = new ContextMenu();
2-如果您不想禁用粘贴选项，您可以使用文本框的 TextChanged 事件并在那里验证粘贴的文本.
2-If you don't want to disable paste option, you may use TextChanged event of the textbox and validate the pasted text there.
这篇关于字母数字文本框 - 粘贴前验证/清理剪贴板文本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编程学习网！