C# winform Listbox添加和删除items

两个listbox添加和删除items

         #region 添加/移除
         //添加
         private void btnAdd_Click(object sender, EventArgs e)
         {
             if (listboxA.Items.Count <= )
             {
                 return;
             }
             this.AddItems(listboxB, listboxA.SelectedItems);
             this.RemoveItems(listboxA, listboxA.SelectedItems);
             //UpdateListViewHandler();//调用委托，更新原列表 刷新MainForm窗体
         }
         //移除
         private void btnRemove_Click(object sender, EventArgs e)
         {
             if (listboxB.Items.Count <= )
             {
                 return;
             }
             this.AddItems(listboxA, listboxB.SelectedItems);
             this.RemoveItems(listboxB, listboxB.SelectedItems);
             //UpdateListViewHandler();//调用委托，更新原列表 刷新MainForm窗体
         }
         /// <summary>
         /// 向一个ListBox中添加Items
         /// </summary>
         /// <param name="lstBox"></param>
         /// <param name="items"></param>
         private void AddItems(UI.ListBoxEx lstBox, IEnumerable items)
         {
             DataTable dt = null;
             foreach (object item in items)
             {
                 if (item is DataRowView)
                     dt = ((DataRowView)item).Row.Table.Clone();
                 if (item is DataRow)
                     dt = ((DataRow)item).Table.Clone();
                 break;
             }
             if (lstBox.DataSource != null)
                 dt = ((DataTable)lstBox.DataSource).Copy();
             foreach (object item in items)
             {
                 if (item is DataRowView)
                     dt.Rows.Add(((DataRowView)item).Row.ItemArray);
                 if (item is DataRow)
                     dt.Rows.Add(((DataRow)item).ItemArray);
             }
             lstBox.DataSource = dt;
             if (this.Text.Contains("Add or Remove Exc"))
             {
                 lstBox.DisplayMember = "ExcName";
                 lstBox.ValueMember = "ExcID";
             }
             else if (this.Text.Contains("Add or Remove Cs"))
             {
                 lstBox.DisplayMember = "CsName";
                 lstBox.ValueMember = "CsID";
             }
         }
         /// <summary>
         /// 从一个ListBox中删除Items
         /// </summary>
         /// <param name="lstBox"></param>
         /// <param name="items"></param>
         private void RemoveItems(UI.ListBoxEx lstBox, IEnumerable items)
         {
             DataTable dt = ((DataTable)lstBox.DataSource);
             DataTable newDt = dt.Clone();
             bool flag = false;
             //因为直接删除DataRow会保存，所以用这样丑陋的方式处理了
             foreach (DataRow dr in dt.Rows)
             {
                 foreach (DataRowView item in items)
                 {
                     if (dr == item.Row)
                     {
                         flag = true;
                         break;
                     }
                     else
                         flag = false;
                 }
                 if (!flag)
                     newDt.Rows.Add(dr.ItemArray);
                 else
                     continue;
             }
             lstBox.DataSource = newDt;
             if (this.Text.Contains("Add or Remove Exc"))
             {
                 lstBox.DisplayMember = "ExcName";
                 lstBox.ValueMember = "ExcID";
             }
             else if (this.Text.Contains("Add or Remove Cs"))
             {
                 lstBox.DisplayMember = "CsName";
                 lstBox.ValueMember = "CsID";
             }
         }
         #endregion