DataTable dt = new DataTable();
        DataTable dtab = new DataTable();
        private void ChooseBtn_Click(object sender, RoutedEventArgs e)
        {
            dt = GetImportExcel();
            if (dt != null && dt.Columns.Count > 0)
            {
                dtab.Columns.Add("旧的列名");
                dtab.Columns.Add("新的列名");
                for (int i = 0; i < dt.Columns.Count; i++)
                {
                    DataRow dr = dtab.NewRow();
                    dr[0] = dt.Columns[i].ColumnName;
                    dr[1] = GetCombox();
                    dtab.Rows.Add(dr);
                }
                gridheader.ItemsSource = dtab.DefaultView;
            }
        }

        public ComboBox GetCombox()
        {
            ComboBox com = new ComboBox();
            com.Width = 150;
            com.Items.Add("姓名");
            com.Items.Add("年龄");
            com.Items.Add("性别");
            com.Items.Add("身高");
            com.SelectedIndex = 0;
            return com;
        }