checkbox的值

  /**//// <summary>
            /// 获得check的值
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="e"></param>
            private void chkLSelect_SelectedIndexChanged(object sender, EventArgs e)
            ...{
                if (chkLSelect.GetItemChecked(0))//判断第0项是否选中
                ...{
                    chkLSelect.SetItemChecked(0, true);//设置第0项是否选中
                }

                this.Txt_FieldValue.Text = null;
                for (int j = 0; j < chkLSelect.Items.Count; j++)
                ...{
                    if (chkLSelect.GetItemChecked(j))
                    ...{
                        this.Txt.Text = this.txt.Text + chkLSelect.Items[j].ToString() + " ";
                    }
                }

            }