我必须为标记实现代码，所以我无法插入字符值帮助我 [英] I Have To Implement A Code For Marks So I Can't Insert The Character Values Help Me

问题描述

double n1, n2, n3, n4, n5, n6;
           float res;
           // n1 = Convert.ToInt32(txttui.Text);
           n1 = Convert.ToDouble(textBox1.Text);
           n2 = Convert.ToDouble(textBox2.Text);
           n3 = Convert.ToDouble(textBox3.Text);
           n4 = Convert.ToDouble(textBox4.Text);
           n5 = Convert.ToDouble(textBox5.Text);
           n6 = Convert.ToDouble(textBox6.Text);
           //  n6 = Convert.ToInt32(txthostl.Text);
           res = n1 + n2 + n3 + n4 + n5 + n6;

           //txttotalfee.Text = Convert.ToString(res);
           textBox27.Text = Convert.ToString(res);

推荐答案

我认为你试图阻止用户输入字符值。如果这是你的问题，那么我在互联网上找到了以下源代码。您可以使用此权限。

I think you are trying to prevent users to input character values. If this is your question then I have found below source code on internet. You can user this.

private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
    if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar) &&
        (e.KeyChar != '.'))
    {
            e.Handled = true;
    }

    // only allow one decimal point
    if ((e.KeyChar == '.') && ((sender as TextBox).Text.IndexOf('.') > -1))
    {
        e.Handled = true;
    }
}

您可以使用相同的方法文本框。

You can use the same method for all your textboxes.

您好，



我建议您阅读以下文章：



WPF中的简单验证 [ ^ ]



祝你好运，

Stephan

Hi,

I would like to suggest reading the following article:

Simple Validation in WPF[^]

Best regards,
Stephan

这篇关于我必须为标记实现代码，所以我无法插入字符值帮助我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！