验证文本框以避免字母和其他字符 [英] Validation for Textbox to avoid alphabets and other characters

问题描述

hi frnds，

如何用数字验证文本框.用户不应输入字母或其他字符...只能输入$数字编号.

用户只能输入4位数字作为2010.

所以，我们该怎么做，您有想法吗，请给我一个好的解决方案.

谢谢.

hi frnds,

how to validate the Textbox with numbers. User should not enter alphabets or other characters...ONLY HE SHOULD ENTER $ DIGIT NUMBER.

user must enter only 4 digits as 2010.

So, how can we do this, do u have idea, please give me a good solution.

Thanks.

推荐答案

数字编号.

用户只能输入4位数字作为2010.

所以，我们该怎么做，您有想法吗，请给我一个好的解决方案.

谢谢.

DIGIT NUMBER.

user must enter only 4 digits as 2010.

So, how can we do this, do u have idea, please give me a good solution.

Thanks.

尝试一下:

Try this:

void CharacterValidation(object sender, KeyPressEventArgs e)
       {
           if ((e.KeyChar >= 65 && e.KeyChar <= 90) || (e.KeyChar >= 97 && e.KeyChar <= 122) || e.KeyChar == 32 || e.KeyChar == 8 || e.Keychar != 36)
           {
               e.Handled = false;
           }
           else
           {
               e.Handled = true;
           }
       }

用户只能输入4位数字作为2010.
您需要设置textBox1.MaxLength = 4;

user must enter only 4 digits as 2010.
You need to set textBox1.MaxLength = 4;

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