listbox 用法

从一个listbox添加到另一个Listbox,从一个listbox删除现有项:

///绑定listbox 

 void Bind_ListBoxDepart(ListBox lb)
    {
        dtDepart = clsDepart.GetTable(1);
        lbDepart.DataTextField = "DEPARTNAME";
        lbDepart.DataValueField = "DEPARTNO";
        lbDepart.DataSource = dtDepart;
        lbDepart.DataBind();
    }

   /// <summary>
    /// 添加部门
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
   protected void btnAddDepart_Click(object sender, EventArgs e)
    {
        foreach (ListItem li in lbDepart.Items)
        {
            if (li.Selected)
            {
                txtDepart.Items.Add(new ListItem(li.Text.Trim(),li.Value.Trim()));
            }
        }        
    }

 /// <summary>
    /// 添加所有部门
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>

    protected void btnAddAll_Click(object sender, EventArgs e)
    {
        foreach (ListItem li in lbDepart.Items)
        {
            txtDepart.Items.Add(new ListItem(li.Text, li.Value));
        
        }
    }
    /// <summary>
    /// 移去部门
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnDeleteDepart_Click(object sender, EventArgs e)
    {
        while (txtDepart.SelectedIndex != -1)
        {
            txtDepart.Items.Remove(txtDepart.SelectedItem);
        }
    }
    /// <summary>
    /// 移去所有部门
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void btnDeleteAll_Click(object sender, EventArgs e)
    {
        txtDepart.Items.Clear();
    }

前台

 <tr style="height: 27px;">
                        <td style="text-align: right; 100px">
                            添加部门
                        </td>
                        <td style="height: 100px">
                            <asp:ListBox ID="lbDepart" runat="server" SelectionMode="Multiple" Width="100px" Height="200px"></asp:ListBox>
                        </td>
                        <td style="text-align: center">
                            <asp:Button ID="btnAddDepart" runat="server" Text="添加" OnClick="btnAddDepart_Click" /><br />
                            <asp:Button ID="btnAddAll" runat="server" Text="全部添加" OnClick="btnAddAll_Click" /><br />
                            <asp:Button ID="btnDeleteDepart" runat="server" Text="删除" OnClick="btnDeleteDepart_Click" /><br />
                            <asp:Button ID="btnDeleteAll" runat="server" Text="全部删除" OnClick="btnDeleteAll_Click" />
                        </td>
                        <td style="height: 200px">
                            <asp:ListBox ID="txtDepart" Height="200px" runat="server" SelectionMode="Multiple" Width="100px"></asp:ListBox>
                        </td>
                    </tr>