如何计算组框中选中的复选框的数量 [英] how to count no of check box checked in a group box

问题描述

在一个分组框内，我使用了5个复选框.当用户尝试2单击大于2时，复选框消息应该像无法选择两个以上一样抛出.因此，用户必须取消选中已选择的任何一个，然后再选择另一个1

Inside a group box i used 5 checked box. when user try 2 click more than 2 check box message should throw like unable to choose more than two.,so user have to uncheck any of one which choosed already then choose another 1

推荐答案

简单-尽管可以控制它:

Easy - loop though it''s controls:

int count = 0;
foreach (Control c in myGroupBox.Controls)
   {
   CheckBox cb = c as CheckBox;
   if (cb != null && cb.Checked)
      {
      count++;
      }
   }

我按照您所说的那样使用了上面的编码.但是所有5个复选框都被选中了."

添加这个...

"i used above coding as u said., but all the 5 checkboxes are getting check.,"

Add this...

if (count > 2)
   {
   cb = sender as CheckBox;
   if (cb != null && cb.Checked)
      {
      cb.Checked = false;
      }
   errorLabel.Text = "You can only select two options";
   }

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