winforms 如何从多个文本框填充数组？

1rhkuytd 于 2022-12-19 发布在其他

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我正在尝试从几个文本框填充一个数组，然后用数组中的值进行计算。
我有下面的代码，但不知道为什么它不工作。在代码中解释：

private void button1_Click(object sender, EventArgs e)
{
    double[] temperaturen = new double[6];

    temperaturen[0] = double.Parse(textBox1.Text);
   
    MessageBox.Show(temperaturen[0].ToString()); //the messagebox is just to test if 
                                                 //it works
}

上面的代码可以工作，但是当我从更多的文本框中添加更多的值后，它就停止工作了：

private void button1_Click(object sender, EventArgs e)
{
    double[] temperaturen = new double[6];
    
    temperaturen[0] = double.Parse(textBox1.Text); //now it stops working and gives 
    temperaturen[1] = double.Parse(textBox2.Text); //the following error:
    temperaturen[2] = double.Parse(textBox3.Text); //format exceptions was unhandled.
    temperaturen[3] = double.Parse(textBox4.Text);
    temperaturen[4] = double.Parse(textBox5.Text);
    temperaturen[5] = double.Parse(textBox6.Text);
    temperaturen[6] = double.Parse(textBox7.Text);

    MessageBox.Show(temperaturen[0].ToString());
}

有人知道从文本框解析是不是正确的方法吗？为什么这不起作用？

winforms

来源：https://stackoverflow.com/questions/74837572/how-to-fill-an-array-from-several-textboxes

3条答案

按热度按时间

qlzsbp2j1#

请注意，您有7个文本框，而不是6，因此您应该声明new double[7]。为了避免此类错误，让我们借助 Linq 进行查询：

using System.Linq;

...

double[] temperaturen = new TextBox[] {
  textBox1, textBox2, textBox3, 
  textBox4, textBox5, textBox6,
  textBox7 }
  .Select(box => double.TryParse(box.Text, out var value) ? value : double.NaN)
  .ToArray();

注意，该文本框可以包含 * 不是 * 有效浮点值的文本（例如，"bla-bla-bla"），在本例中我将double.NaN（Nota****Nnumber）放入其中。

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k75qkfdt2#

真正解决问题的是：添加一个try catch，并将数组更改为具有7个值。
最后的代码，完全运行。

private void button1_Click(object sender, EventArgs e)
{
    decimal[] temperaturen = new decimal[7];//the array

    try // try block
    {
        temperaturen[0] = decimal.Parse(txtZondag.Text);//parsing input 
        temperaturen[1] = decimal.Parse(txtMaandag.Text);//from 
        temperaturen[2] = decimal.Parse(txtDinsdag.Text);//textboxes
        temperaturen[3] = decimal.Parse(txtWoensdag.Text);
        temperaturen[4] = decimal.Parse(txtDonderdag.Text);
        temperaturen[5] = decimal.Parse(txtVrijdag.Text);
        temperaturen[6] = decimal.Parse(txtZaterdag.Text);
        decimal temp = 10.2m;//decimal temp for calculations

        decimal uitkomst1 = 0.0m;//decimal for sum.
        uitkomst1 = temperaturen[0] - temp;//calculation
        textBox8.Text = uitkomst1.ToString();

        decimal uitkomst2 = 0;
        uitkomst2 = temperaturen[1] - temp;
        textBox9.Text = uitkomst2.ToString();

        decimal uitkomst3 = 0;
        uitkomst3 = temperaturen[2] - temp;
        textBox10.Text = uitkomst3.ToString();

        decimal uitkomst4 = 0.0m;
        uitkomst4 = temperaturen[3] = temp;
        textBox11.Text = uitkomst4.ToString();

        decimal uitkomst5 = 0;
        uitkomst5 = temperaturen[4] - temp;
        textBox12.Text = uitkomst5.ToString();

        decimal uitkomst6 = 0;
        uitkomst6 = temperaturen[5] - temp;
        textBox13.Text = uitkomst6.ToString();

        decimal uitkomst7 = 0;
        uitkomst7 = temperaturen[6] - temp;
        textBox14.Text = uitkomst7.ToString();
    }
    catch (Exception exception)//catch block
    {
        MessageBox.Show("Incorrecte invoer!  " + exception.Message);
    }
}

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7lrncoxx3#

最后的代码，完全运行。

private void button1_Click(object sender, EventArgs e)
{
    decimal[] temperaturen = new decimal[7];//the array

    try // try block
    {
        temperaturen[0] = decimal.Parse(txtZondag.Text);//parsing input 
        temperaturen[1] = decimal.Parse(txtMaandag.Text);//from 
        temperaturen[2] = decimal.Parse(txtDinsdag.Text);//textboxes
        temperaturen[3] = decimal.Parse(txtWoensdag.Text);
        temperaturen[4] = decimal.Parse(txtDonderdag.Text);
        temperaturen[5] = decimal.Parse(txtVrijdag.Text);
        temperaturen[6] = decimal.Parse(txtZaterdag.Text);
        decimal temp = 10.2m;//decimal temp for calculations

        decimal uitkomst1 = 0.0m;//decimal for sum.
        uitkomst1 = temperaturen[0] - temp;//calculation
        textBox8.Text = uitkomst1.ToString();

        decimal uitkomst2 = 0;
        uitkomst2 = temperaturen[1] - temp;
        textBox9.Text = uitkomst2.ToString();

        decimal uitkomst3 = 0;
        uitkomst3 = temperaturen[2] - temp;
        textBox10.Text = uitkomst3.ToString();

        decimal uitkomst4 = 0.0m;
        uitkomst4 = temperaturen[3] = temp;
        textBox11.Text = uitkomst4.ToString();

        decimal uitkomst5 = 0;
        uitkomst5 = temperaturen[4] - temp;
        textBox12.Text = uitkomst5.ToString();

        decimal uitkomst6 = 0;
        uitkomst6 = temperaturen[5] - temp;
        textBox13.Text = uitkomst6.ToString();

        decimal uitkomst7 = 0;
        uitkomst7 = temperaturen[6] - temp;
        textBox14.Text = uitkomst7.ToString();
    }
    catch (Exception exception)//catch block
    {
        MessageBox.Show("Incorrecte invoer!  " + exception.Message);
    }
}

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winforms 如何从多个文本框填充数组？

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