C# winform Listbox添加和删除items

两个listbox添加和删除items

  1         #region 添加/移除
  2         //添加
  3         private void btnAdd_Click(object sender, EventArgs e)
  4         {
  5             if (listboxA.Items.Count <= 0)
  6             {
  7                 return;
  8             }
  9             this.AddItems(listboxB, listboxA.SelectedItems);
 10             this.RemoveItems(listboxA, listboxA.SelectedItems);
 11             //UpdateListViewHandler();//调用委托，更新原列表 刷新MainForm窗体
 12         }
 13         //移除
 14         private void btnRemove_Click(object sender, EventArgs e)
 15         {
 16             if (listboxB.Items.Count <= 0)
 17             {
 18                 return;
 19             }
 20             this.AddItems(listboxA, listboxB.SelectedItems);
 21             this.RemoveItems(listboxB, listboxB.SelectedItems);
 22             //UpdateListViewHandler();//调用委托，更新原列表 刷新MainForm窗体
 23         }
 24         /// <summary>
 25         /// 向一个ListBox中添加Items
 26         /// </summary>
 27         /// <param name="lstBox"></param>
 28         /// <param name="items"></param>
 29         private void AddItems(UI.ListBoxEx lstBox, IEnumerable items)
 30         {
 31             DataTable dt = null;
 32             foreach (object item in items)
 33             {
 34                 if (item is DataRowView)
 35                     dt = ((DataRowView)item).Row.Table.Clone();
 36                 if (item is DataRow)
 37                     dt = ((DataRow)item).Table.Clone();
 38                 break;
 39             }
 40             if (lstBox.DataSource != null)
 41                 dt = ((DataTable)lstBox.DataSource).Copy();
 42             foreach (object item in items)
 43             {
 44                 if (item is DataRowView)
 45                     dt.Rows.Add(((DataRowView)item).Row.ItemArray);
 46                 if (item is DataRow)
 47                     dt.Rows.Add(((DataRow)item).ItemArray);
 48             }
 49             lstBox.DataSource = dt;
 50             if (this.Text.Contains("Add or Remove Exc"))
 51             {
 52                 lstBox.DisplayMember = "ExcName";
 53                 lstBox.ValueMember = "ExcID";
 54             }
 55             else if (this.Text.Contains("Add or Remove Cs"))
 56             {
 57                 lstBox.DisplayMember = "CsName";
 58                 lstBox.ValueMember = "CsID";
 59             }
 60         }
 61         /// <summary>
 62         /// 从一个ListBox中删除Items
 63         /// </summary>
 64         /// <param name="lstBox"></param>
 65         /// <param name="items"></param>
 66         private void RemoveItems(UI.ListBoxEx lstBox, IEnumerable items)
 67         {
 68             DataTable dt = ((DataTable)lstBox.DataSource);
 69             DataTable newDt = dt.Clone();
 70             bool flag = false;
 71             //因为直接删除DataRow会保存，所以用这样丑陋的方式处理了
 72             foreach (DataRow dr in dt.Rows)
 73             {
 74                 foreach (DataRowView item in items)
 75                 {
 76                     if (dr == item.Row)
 77                     {
 78                         flag = true;
 79                         break;
 80                     }
 81                     else
 82                         flag = false;
 83                 }
 84                 if (!flag)
 85                     newDt.Rows.Add(dr.ItemArray);
 86                 else
 87                     continue;
 88             }
 89             lstBox.DataSource = newDt;
 90             if (this.Text.Contains("Add or Remove Exc"))
 91             {
 92                 lstBox.DisplayMember = "ExcName";
 93                 lstBox.ValueMember = "ExcID";
 94             }
 95             else if (this.Text.Contains("Add or Remove Cs"))
 96             {
 97                 lstBox.DisplayMember = "CsName";
 98                 lstBox.ValueMember = "CsID";
 99             }
100         }
101         #endregion

 

posted @ 2016-05-11 10:53  zhyue93  阅读(11240)  评论(2)  编辑  收藏  举报