將項目從一個列表框移動到另一個列表框時，如何添加到進入第二個列表框的字符串中？

Question

好吧，所以我的應用程序是一個簡單的嬰兒禮物註冊表。在左邊的組框中，我有2個輸入文本框（item，store）和一個listBox（lstWish）用於輸出。這邊是願望清單。在正確的groupBox中，我有2個輸入文本框（firstName，lastName）和一個listBox（lstPurchased）用於輸出。在button_click上，從lstWish中選擇的項目被移動到lstPurchased。 lstWish目前輸出如「商店可用的商品」。

當物品從lstWish變爲lstPurchased時，我想添加「from firstName lastName」。因此，lstPurchased將讀取「Store from firstName lastName」中提供的商品。如何在移動字符串的同時添加字符串的後半部分？

下面是在移動項目的方法：

private void MoveListBoxItems(ListBox lstWish, ListBox lstPurchased) 
    { 
     ListBox.SelectedObjectCollection sourceItems = lstWish.SelectedItems; 
     foreach (var item in sourceItems) 
     { 
      lstPurchased.Items.Add(item); 
     } 
     while (lstWish.SelectedItems.Count > 0) 
     { 
      lstWish.Items.Remove(lstWish.SelectedItems[0]); 
     } 
    } 

這裏是按鈕單擊代碼：

private void btnBuy_Click(object sender, EventArgs e) 
    { 
     if (txtFirst.Text == "" || txtLast.Text == "") 
     { 
      MessageBox.Show("Please enter first and last name.", "Warning"); 
      this.DialogResult = DialogResult.None; 
     } 
     else 
     { 
      DialogResult result = MessageBox.Show("Click Yes to confirm purchase. Click No to cancel." 
       , "Thank You", MessageBoxButtons.YesNo); 
      if (lstWish.SelectedIndex >=0) 
      { 
       MoveListBoxItems(lstWish, lstPurchased);     
      } 
      else 
      { 
       return; 
      } 
     } 
    } 

該列表是一個集合是一個列表。有兩個自定義類，Gift和Guest。這裏是具有用於填充ListBox中的toString類禮品：

namespace GiftRegistry 
{ 
class Gift 
{ 
    #region Fields 
    private string _item; 
    private string _store; 
    //private string _purchaser; 
    #endregion 

    #region Properties 
    public string Item { get; set; }//modify the set clauses to include regex and title case and   .trim() 

    public string Store { get; set; } 

    //public string Purchaser { get; set; } 
    #endregion 

    #region Constructors 
    public Gift() 
    { 
     this.Item = String.Empty; 
     this.Store = String.Empty; 
    } 

    public Gift(string Item, string Store) 
    { 
     this.Item = Item; 
     this.Store = Store; 
    } 
    #endregion 

    #region Method 
    public override string ToString() 
    { 
     return string.Format("{0} availble at {1}", this.Item, this.Store); 
    } 
    #endregion   
} 

}

遊客等級：

class Guest 
{ 
    #region Fields 
    private string _lastName; 
    private string _firstName; 
    #endregion 

    #region Properties 
    public string LastName 
    { 
     get { return _lastName; } 
     set 
     {     
      if (value == null) 
       throw new ArgumentNullException("Name", "Please enter a name"); 
      _lastName = value.Trim(); 
     } 
    } 
    public string FirstName 
    { 
     get { return _firstName; } 
     set 
     {//see above about regular expressions 
      if (value == null) 
       throw new ArgumentNullException("Name", "Please enter a name"); 
      _firstName = value.Trim(); 
     } 
    } 
    #endregion 

    #region Constructors 
    public Guest() 
    { 
     this.LastName = String.Empty; 
     this.FirstName = String.Empty; 
    } 

    public Guest(string lastName) 
    { 
     this.LastName = lastName; 
     this.FirstName = String.Empty; 
    } 

    public Guest(string lastName, string firstName) 
    { 
     this.LastName = lastName; 
     this.FirstName = firstName; 
    } 
    #endregion 

    #region Method 
    public override string ToString() 
    { 
     return string.Format("{0} {1}", this.FirstName, this.LastName); 
    } 
    #endregion 

} 

Answer 1

在MoveListBoxItems()，您可以連接名字和姓氏有：

lstPurchased.Items.Add(string.Format("{0} from {1} {2}", item.ToString(), firstName, lastName));