从某容器/控件获取指定类型的子控件（C#）

语言：C#

环境：多文档

示例：

private void GetControl(Control control)

        {

            //获取选定容器/控件的子控件

            System.Windows.Forms.Control.ControlCollection controls = this.control.Controls;             

            foreach (Control c in controls)

            {

                //判断控件是否为目标控件类型，此处为RichTextBox

                if (c is RichTextBox)

                {

                    RichTextBox rtb = c as RichTextBox;

                    ……;

                }

            }

        }