如何验证用户在文本框中输入的字符串? [英] How can I validate user entered string in textbox?

问题描述

如何验证文本框中用户输入的字符串?
我的意思是只应使用字母字符，如果有人输入数字或标点符号，则不应在该文本框中接受该字符.

How can I validate user entered string in textbox?
I mean it should be alphabetic characters only, if anybody enter digits or punctuation symbols it should not be accepted in that textbox.

推荐答案

使用

Use a Masked Text box[^] and set the mask to only upper and lower A-Z

现在C#的Windows应用程序中的文本框具有称为事件的名称
您要做的就是使用文本框的KeyPress事件并粘贴以下代码...

Now TextBox in Windows application of C# have something called as events
all u have to do is use the KeyPress event of the textbox and paste in the following code...

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
        {
            //only numbers code

            if (char.IsNumber(e.KeyChar) == false)
            {
                e.Handled = true;
            }
            //backspace workin keycode
            if (e.KeyChar == (char)Keys.Back)
            {
                e.Handled = false;
            }
            //if u want that alphabets must be entered then just use
           // char.IsLower in place of char.IsNumber
        }

和你做了...

一旦找到有用的答案，就对我的答案进行评分

谢谢&问候
基数:rose:

and ur done...

Do rate my answer once u find it useful

Thanks & Regards
Radix :rose:

针对此类问题，我创建了一篇文章

只需检查以下链接，您将得到您问题的答案
增强的文本框控件

for this kind of issue i have created a one article

just check below link you will get answer to your question
Enhanced Textbox Control

这篇关于如何验证用户在文本框中输入的字符串?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IT屋！