Question

我试图找到当前foreach循环所在的位置，我可以根据其当前状态以不同方式处理foreach循环。如果它在groupbox1或groupbox2中。

        int Name = 1;
        string Usernames = @"C:\UPHhour\names.txt";
        using (FileStream fs = new FileStream(Usernames, FileMode.Create, FileAccess.Write))
        using (StreamWriter sw = new StreamWriter(fs))
        {
            var Names = groupBox1.Controls.Cast<Control>().Concat(groupBox2.Controls.Cast<Control>());
            foreach(Control OLR_FF in Names.Cast<Control>().OrderBy(c => c.TabIndex))
            {                   
               if(!string.IsNullOrWhiteSpace(OLR_FF.Text.ToString()))
                {
                    //if the foreach loop is in groupbox1
                    if(OLR_FF is groupbox1)
                    {                           
                        //do something
                    }
                    // or if its in groupbox2 
                    if(OLF_FF is groupbox2) 
                    {
                        //do something different.
                    }
                    //sw.WriteLine("Name"+ Name++ + "=" + OLR_FF.Text.ToString());
                }
            }
        }

如何知道循环是在groupbox1中还是在groupbox2中？

Answer 1

使用Control.Parent属性，然后检查父级是否等于两个组框之一

if(!string.IsNullOrWhiteSpace(OLR_FF.Text.ToString()))
{
    //if the foreach loop is in groupbox1
    if(groupbox1.Equals(OLR_FF.Parent))
    {                           
        //do something
    }
    // or if its in groupbox2 
    else if(groupbox2.Equals(OLF_FF.Parent))
    {
        //do something different.
    }
    //sw.WriteLine("Name"+ Name++ + "=" + OLR_FF.Text.ToString());
}

找到foreach Loop的位置

1 个答案: