循环遍历动态表单和面板并检查单选按钮是否选中 [英] loop through a dynamic form and panel and check if radio buttons check or not

问题描述

我有一个动态创建的表单，在这个表单上有几个在运行时创建的单选按钮.此表单上有一个按钮，例如下一步"，当用户单击下一个时我想循环并检查是否选中了其中一​​个单选按钮，然后再继续，我尝试了以下操作:

I have a form that is dynamically created, on this form are several radio buttons that are created at runtime. There is a button on this form eg "Next" when the user clicks on the next I want to loop through and check if one of the radio buttons are checked before I continue, I have tried the following:

    void nextButton_Click(object sender, EventArgs e)
    {
        foreach (Control c in _form.Controls)
        {
            if (c is RadioButton)
            {
                RadioButton radio = c as RadioButton;

                if (radio is RadioButton)
                {
                    if (radio.Checked == true)
                    {
                        //code continue to next 
                    }
                    else
                    {
                        MessageBox.Show("You must select at least one.");
                    }
                }

            }
        } 
    }

亲切的问候地理

推荐答案

你可以使用 Linq 让它更简单

You can use Linq to make it simpler

bool checked = _form.Controls.OfType<RadioButton>().Any(rb => rb.Checked);

--编辑--

我更新了递归搜索所有控件的答案.

I updated the answer to recursively search all controls.

bool IsChecked(Control parent)
{
    if (parent.Controls.OfType<RadioButton>().Any(rb => rb.Checked)) return true;

    foreach (Control c in parent.Controls)
        if (IsChecked(c)) return true;

    return false;
}

bool checked = IsChecked(_form);

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