 
<div> 
<asp:ListBox ID="ListBox1" runat="server" Height="123px" Width="113px" SelectionMode="Multiple"> 
<asp:ListItem>tom</asp:ListItem> 
<asp:ListItem>jion</asp:ListItem> 
<asp:ListItem>j</asp:ListItem> 
<asp:ListItem>l</asp:ListItem> 
<asp:ListItem>k</asp:ListItem> 
</asp:ListBox> 
&nbsp;<asp:Button ID="btnAdd" runat="server" OnClick="btnAdd_Click" Text="添加" /> 
&nbsp; 
<asp:Button ID="btnRemove" runat="server" Text="移除" OnClick="btnRemove_Click" /> 
&nbsp;<asp:ListBox ID="ListBox2" runat="server" Height="123px" SelectionMode="Multiple" Width="113px"></asp:ListBox> 
</div> 

后臺代碼:

復制代碼代碼如下:

 
protected void btnAdd_Click(object sender, EventArgs e) 
{ 
#region listbox添加記錄的一種錯誤理解 
//選擇多條記錄的時候,會有一條沒有被添加,這是因為當一條記錄被移除后,原來的第二條記錄的index為0 
//for (int i = 0; i < ListBox1.Items.Count; i++) 
//{ 
// if (ListBox1.Items[i].Selected == true) 
// { 
// ListBox2.Items.Add(ListBox1.SelectedValue); 
// ListBox1.Items.Remove(ListBox1.SelectedValue); 
// } 
//} 
#endregion 
#region listbox利用index索引號進行添加的簡單寫法 
//while (0 <= ListBox1.SelectedIndex) 
//{ 
// ListBox2.Items.Add(ListBox1.SelectedItem); 
// ListBox1.Items.Remove(ListBox1.SelectedItem); 
//} 
#endregion 
#region listbox的另一種成功添加方法 
List<ListItem> list = new List<ListItem>(); 
for (int i = ListBox1.Items.Count - 1; i >= 0; i--) 
{ 
if (ListBox1.Items[i].Selected == true) 
{ 
list.Add(ListBox1.Items[i]); 
ListBox1.Items.Remove(ListBox1.Items[i]); 
} 
} 
for (int i = 0; i <=list.Count - 1; i++) 
{ 
ListBox2.Items.Add(list[i]); 
} 
#endregion 
} 
protected void btnRemove_Click(object sender, EventArgs e) 
{ 
while (0 <= ListBox2.SelectedIndex) 
{ 
ListBox1.Items.Add(ListBox2.SelectedItem); 
ListBox2.Items.Remove(ListBox2.SelectedItem); 
} 
} 