C#限制MDI子窗体重复打开——C#判断窗体是否已经打开

private bool HaveOpened(Form 父窗体, string 子窗体Name)
        {
            //查看窗口是否已经被打开

            bool bReturn = true;
            for (int i = 0; i < 父窗体.MdiChildren.Length; i++)
            {
                if (父窗体.MdiChildren[i].Name == 子窗体Name)
                {
                    父窗体.MdiChildren[i].BringToFront();
                    bReturn = false;
                    break;
                }
            }
            return bReturn;
        }

 

 

打开窗体时调用上述方法：

 

Form1 f1=new Form();

if (HaveOpened(父窗体, "子窗体Name"))
            {
                f1.MdiParent = 父窗体;
                f1.Show();
            }