c# - 如果复选框列表未选中 C#，则显示警告消息

Question

我有一个存储在数组中的复选框列表。假设我有 6 个复选框，如果没有一个复选框被选中，那么它会在消息框中显示一条消息，提示“不允许使用空字段。我知道该怎么做，但它似乎不正确. 帮助将不胜感激

这是我的代码。

   private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            CheckBox[] mySecondaryCheckBoxArray = new CheckBox[6];

            mySecondaryCheckBoxArray[0] = secondaryCheckBox1;
            mySecondaryCheckBoxArray[1] = secondaryCheckBox2;
            mySecondaryCheckBoxArray[2] = secondaryCheckBox3;
            mySecondaryCheckBoxArray[3] = secondaryCheckBox4;
            mySecondaryCheckBoxArray[4] = secondaryCheckBox5;
            mySecondaryCheckBoxArray[5] = secondaryCheckBox6;


                //if check box "ALL" is checked, disable the other check box
                foreach(CheckBox secondaryCB in mySecondaryCheckBoxArray)
                {
                    if(secondaryCheckBoxALL.Checked== true)
                    {
                        secondaryCB.Enabled = false;
                    }else
                    {
                        secondaryCB.Enabled = true;
                    }

                }


        }

    //button name call button1
     private void button_Click(object sender, EventArgs e)
        {
         //When this button is clicked, it checked if all the checkbox is checked. If not, display an message in the message box

          CheckBox[] myConfirmSecondaryCheckBoxArray = new CheckBox[6];

            myConfirmSecondaryCheckBoxArray[0] = classCheckBoxALL;
            myConfirmSecondaryCheckBoxArray[1] = classCheckBoxA;
            myConfirmSecondaryCheckBoxArray[2] = classCheckBoxB;
            myConfirmSecondaryCheckBoxArray[3] = classCheckBoxC;
            myConfirmSecondaryCheckBoxArray[4] = classCheckBoxD;
            myConfirmSecondaryCheckBoxArray[5] = classCheckBoxE;

           //Check for loop
           foreach (CheckBox secondaryCB in myConfirmSecondaryCheckBoxArray)
            {   
                //This part doesn't work because the message box showed up 6                  times
               if (secondaryCB.Check ==false)
                {
                    MessageBox.Show("Empty field not allowed");
                }
            }



       }

Answer 1

测试可能是这样的 (Linq):

  private void button_Click(object sender, EventArgs e) {
    ...    
    if (myConfirmSecondaryCheckBoxArray.All(checkBox => !checkBox.Checked))
      MessageBox.Show("Empty field not allowed");
  }

您也可以简化其他代码，例如

  ...
  secondaryCB.Enabled = myConfirmSecondaryCheckBoxArray.Any(checkBox => checkBox.Checked);