如何在Windows窗体应用程序只允许字母在一个文本框?
问题描述:
我怎么能允许字母从A到Z的在Windows文本框窗体应用程序。什么是源$ C $ C在C#?
How can I permit letters from A to Z in a textbox in a Windows Forms application. What is the source code in C#?
答
在构造函数或通过设计师:
in your constructor or via designer:
textBox.KeyPress += new KeyPressEventHandler(textBox_KeyPress);
然后事件处理程序:
Then the event handler:
private void textBox_KeyPress(object sender, KeyPressEventArgs e)
{
if (e.KeyChar < 65 || e.KeyChar > 122)
{
e.Handled = true;
}
}