Asp.NET 中两个listbox实现值相互传递

/// <summary> /// 增加listbox的值的方法 /// </summary> /// <param name="sourceBox"></param> /// <param name="targetBox"></param> private void AddItemFromSourceListBox(ListBox sourceBox, ListBox targetBox) {  foreach (ListItem item in sourceBox.Items)  {   if (item.Selected && !targetBox.Items.Contains(item))   {    targetBox.Items.Add(item);   }  } }

 /// <summary> /// 删除listbox的值的方法 /// </summary> /// <param name="listControl"></param> private void RemoveSelectedItem(ListBox listControl) {  while (listControl.SelectedIndex != -1)  {   listControl.Items.RemoveAt(listControl.SelectedIndex);  } }

 

/// <summary> /// 增加 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnAdd_Click(object sender, EventArgs e) {  if (ListBoxOldPaper.SelectedItem == null)  {   return;  }  else  {   AddItemFromSourceListBox(ListBoxOldPaper, ListBoxNewPaper);   RemoveSelectedItem(ListBoxOldPaper);   ListBoxNewPaper.SelectedIndex = ListBoxNewPaper.Items.Count - 1;   //设置当前选中项   SetBtnEnable();  //设置按钮是否可用  } }

/// <summary> /// 删除 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnDel_Click(object sender, EventArgs e) {  if (ListBoxNewPaper.SelectedItem != null)  {   AddItemFromSourceListBox(ListBoxNewPaper, ListBoxOldPaper);   RemoveSelectedItem(ListBoxNewPaper);   ListBoxOldPaper.SelectedIndex = ListBoxOldPaper.Items.Count - 1;   //设置当前选中项  }  SetBtnEnable(); }

/// <summary> /// 全部增加 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnAddAll_Click(object sender, EventArgs e) {  foreach (ListItem item in ListBoxOldPaper.Items)  {   if (!ListBoxNewPaper.Items.Contains(item))   {    ListBoxNewPaper.Items.Add(item);   }  }  ListBoxOldPaper.Items.Clear();  //清空原有的项  SetBtnEnable(); }

 

/// <summary> /// 全部删除 /// </summary> /// <param name="sender"></param> /// <param name="e"></param> protected void btnDelAll_Click(object sender, EventArgs e) {  ListBoxOldPaper.Items.Clear();  //先清空源集合的所有项  ListBoxNewPaper.Items.Clear();    //清空新集合的所有项  GetOldPaperListBoxDataSource();   //重新绑定源集合的项  SetBtnEnable(); }