Winform初学

 /// <summary>
        /// 遍历选中
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ckItem_CheckedChanged(object sender, EventArgs e)
        {
            if (ckItem.Checked == true)
            {
                for (int k = 0; k < this.ckBoxItem.Items.Count; k++)
                { ckBoxItem.SetItemChecked(k, true); }
                this.ckItem.Text = "反选";
            }
            else
            {
                for (int k = 0; k < this.ckBoxItem.Items.Count; k++)
                { ckBoxItem.SetItemChecked(k, false); }
                ckItem.Text = "全选";
            }
          
        }
        /// <summary>
        /// 取得值
        /// </summary>
        public void GetValue()
        {
            string positionIDs = string.Empty;
            foreach (DataRowView item in this.ckBoxPosition.CheckedItems)
            {
                positionIDs += item.Row["lngpositionid"].ToString() + ",";
            }
            MessageBox.Show(positionIDs);
        }