Question

每次选中复选框，我都希望能够以增量方式添加到进度条。因此，如果检查4个复选框中的1个，则等于让我们说25％的进度条。此外，如果取消选中4个复选框中的一个，则进度条将相应减少。这就是我遇到的问题。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication1
{
  public partial class Form1 : Form
  {
    public Form1()
    {
        InitializeComponent();
    }

    private void progressBar1_Click(object sender, EventArgs e)
    {
        progressBar1.Minimum = 0;
        progressBar1.Maximum = 100;
        int num1 = progressBar1.Maximum / 4;
        int num2 = progressBar1.Maximum / 4;
        int num3 = progressBar1.Maximum / 4;
        int num4 = progressBar1.Maximum / 4;
        int numAns;
        numAns = num1 + num2 + num3 + num4;
        progressBar1.Value = numAns;
    }

    private void checkBox1_CheckedChanged(object sender, EventArgs e)
    {
        if(checkBox1.Checked == true)
        {  


        }
        else if (checkBox1.Checked == false)
        {

        }
    }
    private void checkBox2_CheckedChanged(object sender, EventArgs e)
   {

    }
    private void checkBox3_CheckedChanged(object sender, EventArgs e)
    {

    }
    private void checkBox4_CheckedChanged(object sender, EventArgs e)
    {

    }
}

}

Answer 1

您可以为所有复选框使用相同的事件处理程序，而无需为4个复选框制作4个方法...

private const Int32 TOTAL_CHECKBOXES = 4;
private static Int32 s_Checks = 0;

private void OnCheckedChanged(object sender, EventArgs e)
{
    if (((CheckBox)sender).Checked)
        ++s_Checks;
    else
        --s_Checks;

    progressBar.Value = s_Checks * (progressBar.Maximum / TOTAL_CHECKBOXES);
}

Answer 2

废弃ProgressBar1_click，对于每个框，只需在CheckedChanged上的ProgressBar1.Value中添加（如果已选中）或减去（如果不是）25。

Answer 3

您可以将同一事件连接到所有复选框。我将我添加到列表中，因此如果您希望将来添加更多内容，您只需添加处理程序并将其添加到列表中即可完成。

public Form1()
{

    InitializeComponent();

    checkBox1.CheckedChanged += CheckedChanged_1;
    checkBox2.CheckedChanged += CheckedChanged_1;
    checkBox3.CheckedChanged += CheckedChanged_1;
    checkBox4.CheckedChanged += CheckedChanged_1;

    checkboxesToCount.AddRange(new CheckBox[] {checkBox1, checkBox2, checkBox3, checkBox4});


}

private void CheckedChanged_1(object sender, EventArgs e)
{
    progressBar1.Value = 100 * checkboxesToCount.Count((c) => { return c.Checked; }) / checkboxesToCount.Count;
}

进度条应该反映所选复选框的数量

3 个答案: