两个ListBox的互动方法

来源：http://cfeng518.blog.163.com/blog/static/174677322007112011553642/

效果:

ASPX页面: 

  
    

   
     
   
      
   
     <
   
     table
   
     >
   
     
 
   
     <
   
     tbody
   
     >
   
     
 
   
     <
   
     tr
   
     >
   
     
 
   
     <
   
     td
   
     >
   
     
 
   
     <
   
     asp:ListBox ID
   
     =
   
     "
   
     lbLeft
   
     "
   
      runat
   
     =
   
     "
   
     server
   
     "
   
      SelectionMode
   
     =
   
     "
   
     Multiple
   
     "
   
     >
   
     
 
   
     <
   
     asp:ListItem
   
     >
   
     添加名字
   
     </
   
     asp:ListItem
   
     >
   
     
 
   
     <
   
     asp:ListItem
   
     >
   
     出生年月
   
     </
   
     asp:ListItem
   
     >
   
     
 
   
     </
   
     asp:ListBox
   
     >
   
     
 
   
     </
   
     td
   
     >
   
     
 
   
     <
   
     td style
   
     =
   
     "
   
     width: 27px
   
     "
   
     >
   
     
 
   
     <
   
     asp:Button ID
   
     =
   
     "
   
     btnToRight
   
     "
   
      runat
   
     =
   
     "
   
     server
   
     "
   
      Text
   
     =
   
     "
   
     >>
   
     "
   
      
 OnClick
   
     =
   
     "
   
     btnToRight_Click
   
     "
   
      
   
     />
   
     
 
   
     <
   
     br 
   
     />
   
     
 
   
     <
   
     asp:Button ID
   
     =
   
     "
   
     btnToLeft
   
     "
   
      runat
   
     =
   
     "
   
     server
   
     "
   
      Text
   
     =
   
     "
   
     <<
   
     "
   
      
 OnClick
   
     =
   
     "
   
     btnToLeft_Click
   
     "
   
      
   
     />
   
     
 
   
     </
   
     td
   
     >
   
     
 
   
     <
   
     td style
   
     =
   
     "
   
     width: 3px
   
     "
   
     >
   
     
 
   
     <
   
     asp:ListBox ID
   
     =
   
     "
   
     lbRight
   
     "
   
      runat
   
     =
   
     "
   
     server
   
     "
   
      
 SelectionMode
   
     =
   
     "
   
     Multiple
   
     "
   
     ></
   
     asp:ListBox
   
     ></
   
     td
   
     >
   
     
 
   
     </
   
     tr
   
     >
   
     
 
   
     </
   
     tbody
   
     >
   
     

   
     </
   
     table
   
     >
   
     

   
     <
   
     asp:Label ID
   
     =
   
     "
   
     lblMsg
   
     "
   
      runat
   
     =
   
     "
   
     server
   
     "
   
     ></
   
     asp:Label
   
     >
  
    

CS Code ：

  
    

   
     
   
     using
   
      System;

   
     using
   
      System.Data;

   
     using
   
      System.Configuration;

   
     using
   
      System.Collections;

   
     using
   
      System.Web;

   
     using
   
      System.Web.Security;

   
     using
   
      System.Web.UI;

   
     using
   
      System.Web.UI.WebControls;

   
     using
   
      System.Web.UI.WebControls.WebParts;

   
     using
   
      System.Web.UI.HtmlControls;


 
   
     public
   
      
   
     partial
   
      
   
     class
   
      Test1 : System.Web.UI.Page
 {
 
   
     protected
   
      
   
     void
   
      Page_Load ( 
   
     object
   
      sender , EventArgs e )
 {

 }
 
   
     protected
   
      
   
     void
   
      btnToRight_Click(
   
     object
   
      sender, EventArgs e)
 {
 
   
     if
   
     (lbLeft.SelectedItem 
   
     !=
   
      
   
     null
   
     )
 {
 AddItemFromSourceListBox(lbLeft, lbRight);

 RemoveSelectedItem(lbLeft);

 lblMsg.Text
   
     =
   
     ""
   
     ; 
   
     //
   
     注意:为什么要这一行?
   
     

   
      
 
   
     foreach
   
     (ListItem item 
   
     in
   
      lbRight.Items)
 {
 
   
     if
   
     (item.Selected)
 lblMsg.Text 
   
     +=
   
     item.Text;
 }
 }
 }

 
   
     protected
   
      
   
     void
   
      btnToLeft_Click(
   
     object
   
      sender, EventArgs e)
 {
 
   
     if
   
     (lbRight.SelectedItem 
   
     !=
   
      
   
     null
   
     )
 { 
 AddItemFromSourceListBox(lbRight, lbLeft);
 RemoveSelectedItem(lbRight);
 }
 }

 
   
     private
   
      
   
     void
   
      RemoveSelectedItem(ListBox listControl)
 { 
 
   
     while
   
     (listControl.SelectedIndex 
   
     !=
   
      
   
     -
   
     1
   
     )
 {
 listControl.Items.RemoveAt(listControl.SelectedIndex);
 } 
 }

 
   
     private
   
      
   
     void
   
      AddItemFromSourceListBox(ListBox sourceBox,ListBox targetBox)
 {
 
   
     foreach
   
     (ListItem item 
   
     in
   
      sourceBox.Items)
 {
 
   
     if
   
     (item.Selected 
   
     ==
   
      
   
     true
   
      
   
     &&
   
      
   
     !
   
     targetBox.Items.Contains(item))
 {
 targetBox.Items.Add(item);
 }
 }
 }

}