DataGrid 通过内部控件获取所在控件的列索引

DataGrid 通过内部控件获取所在控件的列索引， 原来以为列所引很容易通过属性得到，没想到费了一番周转，花了不少时间，太过费劲了，不知有更简单的方法没？

foreach (DataGridItem i in this.DtGrid.Controls[0].Controls)
            {
                if (i.ItemType == ListItemType.Header)
                {
                    for (int month_i = 1; month_i <= 12; month_i++)
                    {
                        Label myLabel = (Label)i.FindControl("lblMonth" + month_i.ToString());
                        myLabel.Text = myYear.ToString() + "." + myMonth.ToString();

                        myMonth++;
                        if (myMonth > 12)
                        {
                            myMonth = myMonth - 12;
                            myYear += 1;
                        }

                        //判断改列是否要隐藏，是则隐藏
                        for(int m =0; m < i.Cells.Count; m++)
                        {
                            if(i.Cells[m].Controls.Contains(myLabel))
                            {
                                bool isHas = false;
                                for (int n = 0; n < yearMonth.Length; n++)
                                {
                                    if(myLabel.Text == yearMonth[n].Replace('-','.'))
                                    {
                                        isHas= true;
                                        break;
                                    }
                                }

                                if(!isHas)
                                {
                                    DtGrid.Columns[m].Visible = false;
                                }
                                 break;

                            }

                         }
                    }

                    break;
                }

            }

        }

关键是通过 i.Cells[m].Controls.Contains（控件）判断是否在cells[m]存在要找的控件

用cells[].findControls()是找不到对应列的控件，居然会把整个cells[]所在行的控件都找出来

如cells[0]。findControls()可以找到cells[1]中的控件 不解