.NET 中的数字分组

Question

C#中如何输入数字分组？我的代码有效，但仅适用于一个实例。我必须不断点击它才能对计算器中的每个数字进行分组。我们如何对其进行分组，以便如果我们单击它，它将对每个数字（而不仅仅是显示的数字）进行分组，而如果我们取消选中该复选框，则不会分组？

这是当前的代码：

NumberFormatInfo nFI = new CultureInfo("en-US", false).NumberFormat;


double int_value = Convert.ToDouble(textboxt1.text);


textbox1.Text = int_Value.ToString("N", nFI);

Answer 1

听起来您在错误的位置调用了格式。除了单击复选框（即，每当您单击计算器时），当您的值发生变化时，您可能还想调用 textbox1.Text = int_Value.ToString("N", nFI);按钮或 textboxt1.TextChanged 或其他），并且仅当您的复选框被选中时（if (checkbox1.Checked == true) textbox1.Text...）。它也可能应该在一个单独的函数中，在所有需要它的地方调用它。

为了清晰起见进行编辑

您可能遇到的问题是您有多个源正在更改 textbox1 中的显示。您发布的代码很可能位于某些 checkbox_CheckChanged(sender, e) 事件处理程序中。

您可能在其他地方也有代码（可能是计算器按钮或其他东西），它们会更改文本框中的值（例如...

double value = Convert.ToDouble(textbox.Text);
value = value + 1;
textbox1.Text = value.ToString();

在 +1 按钮中？）

您想要做的是有一个单独的 displayValue (double value) 函数将始终正确地格式化它，也许像...

private void SetDisplayValue(double value)
{
    NumberFormatInfo nFI = new CultureInfo("en-US", false).NumberFormat
    if (checkBox.Checked == true)
        textbox1.Text = value.ToString("N", nFI);
    else
        textbox1.Text = value.ToString();
}

以及您在代码中设置 textbox1.Text 的每个位置，无论它是在按钮中还是在 _CheckChanged 中或无论如何，调用该私有函数即可。

Answer 2

好的，这就是代码：

using System;
使用 System.Collections.Generic；
使用 System.ComponentModel；
使用系统数据；
使用系统绘图；
使用系统文本；
使用 System.Windows.Forms；
使用系统全球化；

命名空间_3rdQuarterExam_ADLM
{
公共部分类 Form1 ：表格
{

    public Form1()
    {
        InitializeComponent();
    }



    double x;
    double y;
    string operation;
    double memory;
    string current;


    private void button1_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button1.Text;
        }

        else
        {
            textBox1.Text += button1.Text;
        }

    }

    private void button13_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button13.Text;
        }

        else
        {
            textBox1.Text += button13.Text;
        }

    }

    private void button6_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button6.Text;
        }

        else
        {
            textBox1.Text += button6.Text;
        }

    }

    private void button16_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button16.Text;
        }

        else
        {
            textBox1.Text += button16.Text;
        }

    }

    private void button9_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button9.Text;
        }

        else
        {
            textBox1.Text += button9.Text;
        }

    }

    private void button3_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button3.Text;
        }

        else
        {
            textBox1.Text += button3.Text;
        } 
    }

    private void button10_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button10.Text;
        }

        else
        {
            textBox1.Text += button10.Text;
        } 


    }

    private void button15_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button15.Text;
        }

        else
        {
            textBox1.Text += button15.Text;
        }

    }

    private void button8_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button8.Text;
        }

        else
        {
            textBox1.Text += button8.Text;
        }

    }

    private void button4_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button4.Text;
        }

        else
        {
            textBox1.Text += button4.Text;
        }


    }

    private void Plus_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = Plus.Text;
        }
        else
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = Plus.Text;
            textBox1.Text = "";
        }
    }

    private void MINUS_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = MINUS.Text;
        }
        else
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = MINUS.Text;
            textBox1.Text = "";
        }
    }

    private void Times_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = Times.Text;
        }
        else
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = Times.Text;
            textBox1.Text = "";
        }
    }

    private void DIVIDE_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = DIVIDE.Text;
        }
        else
        {
            x = Convert.ToDouble(textBox1.Text);
            operation = DIVIDE.Text;
            textBox1.Text = "";
        }
    }

    private void button24_Click(object sender, EventArgs e)
    {
        y = Convert.ToDouble(textBox1.Text);

        if (operation == Plus.Text)
        {
            textBox1.Text = Convert.ToString(x + y);
        }
        else if (operation == MINUS.Text)
        {
            textBox1.Text = Convert.ToString(x - y);
        }
        else if (operation == Times.Text)
        {
            textBox1.Text = Convert.ToString(x * y);
        }
        else if (operation == DIVIDE.Text)
        {
            textBox1.Text = Convert.ToString(x / y);
        }
    }

    private void button25_Click(object sender, EventArgs e)
    {
        textBox1.Text = textBox1.Text.Substring(0, textBox1.Text.Length - 1);
    }

    private void button27_Click(object sender, EventArgs e)
    {
        textBox1.Text = "0.";
    }

    private void button26_Click(object sender, EventArgs e)
    {
        textBox1.Text = "0.";
        operation = Convert.ToString(ConsoleCancelEventArgs.Empty);
    }

    private void button21_Click(object sender, EventArgs e)
    {
        x = Convert.ToDouble(textBox1.Text);
        textBox1.Text = Convert.ToString(Math.Sqrt(x));
    }

    private void button19_Click(object sender, EventArgs e)
    {
        x = Convert.ToDouble(textBox1.Text);
        textBox1.Text = Convert.ToString(1 / x);
    }

    private void button20_Click(object sender, EventArgs e)
    {

        y = Convert.ToDouble(textBox1.Text);

        textBox1.Text = Convert.ToString(x * (y / 100));
    }

    private void button2_Click(object sender, EventArgs e)
    {
        x = Convert.ToDouble(textBox1.Text);

        if (textBox1.Text == "0.")
        {
            textBox1.Text = textBox1.Text;
        }
        else
        {
            textBox1.Text = Convert.ToString(-1 * x);
        }
    }

    private void button5_Click(object sender, EventArgs e)
    {
        if (textBox1.Text == "0.")
        {
            textBox1.Text = button5.Text;
        }
        else
        {
            textBox1.Text += button5.Text;
        }
    }

    private void copyToolStripMenuItem_Click(object sender, EventArgs e)
    {
        current = textBox1.Text;
    }

    private void pasteToolStripMenuItem_Click(object sender, EventArgs e)
    {
        textBox1.Text = "";
        textBox1.Paste(current);
    }

    private void aboutUToolStripMenuItem_Click(object sender, EventArgs e)
    {
        Form2 form = new Form2();
        form.Show();

    }

    private void button18_Click(object sender, EventArgs e)
    {
        memory = 0;
        textBox1.Text = "0.";
    }

    private void button12_Click(object sender, EventArgs e)
    {
        textBox1.Text = Convert.ToString(memory);
    }

    private void button17_Click(object sender, EventArgs e)
    {
        memory = 0;
        memory += Convert.ToDouble(textBox1.Text);
    }

    private void button11_Click(object sender, EventArgs e)
    {
        memory += Convert.ToDouble(textBox1.Text);
    }

    private void digitGroupingToolStripMenuItem_Click(object sender, EventArgs e)
    {

        if (digitGroupingToolStripMenuItem.Checked)
        {
            NumberFormatInfo nFI = new CultureInfo("en-US", false).NumberFormat;
            double int_value = Convert.ToDouble(textBox1.Text);
            textBox1.Text = int_value.ToString("N", nFI);
        }
        else
        {

        }
     }



    }

}

我们应该把它放在哪里？