C # WinForm ListBox Add and remove items

Two listbox add and remove items

1         #regionAdd/Remove2         //Add3         Private voidbtnAdd_Click (Objectsender, EventArgs e)4         {5             if(ListboxA.Items.Count <=0)6             {7                 return;8             }9              This. Additems (Listboxb, listboxa.selecteditems);Ten              This. Removeitems (Listboxa, listboxa.selecteditems); One             //Updatelistviewhandler ();//invoke delegate, update original list refresh MainForm form A         } -         //removed from -         Private voidBtnremove_click (Objectsender, EventArgs e) the         { -             if(ListboxB.Items.Count <=0) -             { -                 return; +             } -              This. Additems (Listboxa, listboxb.selecteditems); +              This. Removeitems (Listboxb, listboxb.selecteditems); A             //Updatelistviewhandler ();//invoke delegate, update original list refresh MainForm form at         } -         /// <summary> -         ///Add items to a ListBox -         /// </summary> -         /// <param name= "Lstbox" ></param> -         /// <param name= "items" ></param> in         Private voidAdditems (UI. Listboxex Lstbox, IEnumerable items) -         { toDataTable dt =NULL; +             foreach(ObjectIteminchitems) -             { the                 if(item isDataRowView) *DT =((DataRowView) item). Row.Table.Clone (); $                 if(item isDataRow)Panax NotoginsengDT =(DataRow) item). Table.clone (); -                  Break; the             } +             if(Lstbox.datasource! =NULL) ADT =(DataTable) (Lstbox.datasource). Copy (); the             foreach(ObjectIteminchitems) +             { -                 if(item isDataRowView) $ dt. Rows.Add ((DataRowView) item). Row.itemarray); $                 if(item isDataRow) - dt. Rows.Add ((DataRow) item). ItemArray); -             } theLstbox.datasource =DT; -             if( This. Text.contains ("Add or Remove Exc"))Wuyi             { theLstbox.displaymember ="Excname"; -Lstbox.valuemember ="Excid"; Wu             } -             Else if( This. Text.contains ("Add or Remove Cs")) About             { $Lstbox.displaymember ="CSName"; -Lstbox.valuemember ="CsID"; -             } -         } A         /// <summary> +         ///remove items from a ListBox the         /// </summary> -         /// <param name= "Lstbox" ></param> $         /// <param name= "items" ></param> the         Private voidRemoveitems (UI. Listboxex Lstbox, IEnumerable items) the         { theDataTable dt =(DataTable) lstbox.datasource); theDataTable NEWDT =dt. Clone (); -             BOOLFlag =false; in             //because the direct deletion of the DataRow is saved, so it's handled in such an ugly way the             foreach(DataRow Drinchdt. Rows) the             { About                 foreach(DataRowView Iteminchitems) the                 { the                     if(dr = =item. Row) the                     { +Flag =true; -                          Break; the                     }Bayi                     Else theFlag =false; the                 } -                 if(!flag) - NewDt.Rows.Add (Dr. ItemArray); the                 Else the                     Continue; the             } theLstbox.datasource =NEWDT; -             if( This. Text.contains ("Add or Remove Exc")) the             { theLstbox.displaymember ="Excname"; theLstbox.valuemember ="Excid";94             } the             Else if( This. Text.contains ("Add or Remove Cs")) the             { theLstbox.displaymember ="CSName";98Lstbox.valuemember ="CsID"; About             } -         }101         #endregion

C # WinForm ListBox Add and remove items