listbox相互传值

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<html>

void AddBtn_Click(Object Src, EventArgs E) {

if (AvailableFonts.SelectedIndex != -1) {

               InstalledFonts.Items.Add(new ListItem(AvailableFonts.SelectedItem.Value));
               AvailableFonts.Items.Remove(AvailableFonts.SelectedItem.Value);
            }
        }

void AddAllBtn_Click(Object Src, EventArgs E) {

while (AvailableFonts.Items.Count != 0) {

               InstalledFonts.Items.Add(new ListItem(AvailableFonts.Items[0].Value));
               AvailableFonts.Items.Remove(AvailableFonts.Items[0].Value);
            }
        }

void RemoveBtn_Click(Object Src, EventArgs E) {

if (InstalledFonts.SelectedIndex != -1) {

               AvailableFonts.Items.Add(new ListItem(InstalledFonts.SelectedItem.Value));
               InstalledFonts.Items.Remove(InstalledFonts.SelectedItem.Value);
            }
        }

void RemoveAllBtn_Click(Object Src, EventArgs E) {

while (InstalledFonts.Items.Count != 0) {

               AvailableFonts.Items.Add(new ListItem(InstalledFonts.Items[0].Value));
               InstalledFonts.Items.Remove(InstalledFonts.Items[0].Value);
            }
        }

</script>

<body>

<h3><font face="Verdana">Handling Multiple Control Action Events</font></h3>

<p>

This sample demonstrates how to handle multiple control action events raised from
different <asp:button> controls.

<p>

<hr>

<table>
             <tr>
               <td>
                 Available Fonts
               </td>
               <td>
                 
               </td>
               <td>
                 Installed Fonts
               </td>
             </tr>
             <tr>
               <td>
                 <asp:listbox id="AvailableFonts" width="100px" runat=server>
                    <asp:listitem>Roman</asp:listitem>
                    <asp:listitem>Arial Black</asp:listitem>
                    <asp:listitem>Garamond</asp:listitem>
                    <asp:listitem>Somona</asp:listitem>
                    <asp:listitem>Symbol</asp:listitem>
                 </asp:listbox>
               </td>
               <td>
                 
               </td>
               <td>
                 <asp:listbox id="InstalledFonts" width="100px" runat=server>
                    <asp:listitem>Times</asp:listitem>
                    <asp:listitem>Helvetica</asp:listitem>
                    <asp:listitem>Arial</asp:listitem>
                 </asp:listbox>
               </td>
             </tr>
             <tr>
               <td>
                 
               </td>
               <td>
                 <asp:button text="<<" OnClick="RemoveAllBtn_Click" runat=server/>
                 <asp:button text="<" OnClick="RemoveBtn_Click" runat=server/>
                 <asp:button text=">" OnClick="AddBtn_Click" runat=server/>
                 <asp:button text=">>" OnClick="AddAllBtn_Click" runat=server/>
               </td>
               <td>
                 
               </td>
             </tr>
          </table>

</form>

</body>

</html>