Question

我们如何在C＃中输入数字分组？我的代码可以工作但只适用于一个实例。我必须不断点击它来对计算器中的每个数字进行分组。我们如何对它进行分组，以便如果我们点击它，它会对每个数字进行分组（不仅仅是显示的数字），如果我们取消选中该复选框，它就不会？

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

听起来你在错误的地方调用格式。除了单击复选框（即，每当您点击计算器按钮或textbox1.Text = int_Value.ToString("N", nFI);或其他任何内容）时，您可能希望在值发生变化时调用textboxt1.TextChanged，并且仅在您选中复选框时已选中（if (checkbox1.Checked == true) textbox1.Text...）。它也应该在一个单独的函数中，在所需的所有位置调用。

为了清晰起见而编辑

您可能遇到的问题是您有多个来源正在更改textbox1中的显示内容。您发布的代码最有可能出现在某个checkbox_CheckChanged(sender, e)事件处理程序中。

您可能还有其他地方的代码（可能是计算器按钮或其他内容）会改变文本框中的值（类似......

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

在+1按钮中，例如？）

你想要做的是有一个单独的displayValue(double value)函数，它会一直正确地格式化它，可能就像......

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();
}

以及在代码中设置textbox1.Text的每个地方，无论是在按钮中还是在_CheckChanged或whatnot中，都会调用该私有函数。

Answer 2

好的，这就是代码：

使用System; 使用System.Collections.Generic; 使用System.ComponentModel; 使用System.Data; 使用System.Drawing; 使用System.Text; 使用System.Windows.Forms; 使用System.Globalization;

namespace _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？

.NET中的数字分组

2 个答案: