比较输入值的ASCII以检查它是字符还是数字 [英] Compare ASCII of Input values to check whether it is Character or Numeric
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问题描述
我需要检查用户是否在 DataGridViewTextBoxCell 中输入了字符或数字.如何根据DataGridView的KeyPress事件中输入的键的ASCII值执行此比较..
有任何建议吗?
I need to check whether user entered a character or numeric digit in DataGridViewTextBoxCell. How to perform this comparison on the basis of ASCII values of entered key in KeyPress Event of DataGridView.
Any Suggestion ?
推荐答案
在 ^ ].
我主要使用此代码段来验证文本框用户输入.但是我认为您也可以在DataGridViewCell上使用它.试试看.
而且您不必在C#中使用ASCII代码.您可以将 e.KeyChar 与一个直接表示ASCII值的整数进行比较.
I mostly used this code snippet to validate textbox user input. But I think you can use it on a DataGridViewCell as well. Give it a try.
And you don''t have to use ASCII codes in C#. You can compare e.KeyChar to an integer which represents the ASCII value directly.
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
//97 - 122 = Ascii codes for simple letters
//65 - 90 = Ascii codes for capital letters
//48 - 57 = Ascii codes for numbers
if (e.KeyChar != 8)
{
if (e.KeyChar < 48 | e.KeyChar > 57)
{
e.Handled = true;
}
}
}
使用[^ ]方法检查其内容.
Use one of the System.Char
[^] methods to check what it is.
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