与TextBox控件联合用于增加或减少TextBox中的Value值。
属性：
TargetControlID：该控件的目标作用控件。
Width：该控件加上目标TextBox控件的宽度，要是不设定将看不到TextBox控件。
RefValues：该控件中使用的一个字符串列，用于在TextBox中递增递减。
ServiceUpPath：调用增加值的web方法时的路径。
ServiceDownPath：调用减少值的web方法时的路径。
ServiceUpMethod：调用增加值的web方法。
ServiceDownMethod：调用减少值的web方法。
TargetButtonUpID：自定义的增加值的控件按钮。
TargetButtonDownID：自定义的减少值的控件按钮。
实例代码：
<html xmlns="http://www.w3.org/1999/xhtml"><head runat="server"> <title>Untitled Page</title></head><body> <form id="form1" runat="server"> <center><h1>NumericUpDown控件的使用</h1></center> <asp:ScriptManager ID="ScriptManager1" runat="server"> </asp:ScriptManager> Enter a numeric value and use the up and down buttons to <br />increment/decrement(min:1 and max:7) <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> <br /> <br /> Choose your favorite month <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox><br /> <br /> Let the web service pick a random number between 0 and <br /> 1000 that is higher/lower than the displayed value <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox><br /> <br /> Use the arrow images to increment/decrement the value <asp:TextBox ID="TextBox4" runat="server" Height="15px"></asp:TextBox> <ajaxToolkit:NumericUpDownExtender ID="NumericUpDownExtender4" TargetControlID="TextBox4" Width="150" TargetButtonUpID="ImageButtonUp" TargetButtonDownID="ImageButtonDown" runat="server"> </ajaxToolkit:NumericUpDownExtender> <asp:ImageButton ID="ImageButtonDown" runat="server" Width="15px" Height="15px" ImageUrl="~/Images/ArrowDown01.gif" /> <asp:ImageButton ID="ImageButtonUp" runat="server" Width="15px" Height="15px" ImageUrl="~/Images/ArrowUp01.gif" /> <br /> <ajaxToolkit:NumericUpDownExtender ID="NumericUpDownExtender1" TargetControlID="TextBox1" Width="150" Minimum=1 Maximum=7 runat="server"> </ajaxToolkit:NumericUpDownExtender> <ajaxToolkit:NumericUpDownExtender ID="NumericUpDownExtender2" TargetControlID="TextBox2" Width="150" RefValues="January;February;March;April;May;June;July;August;September;October;November;December" runat="server"> </ajaxToolkit:NumericUpDownExtender> <ajaxToolkit:NumericUpDownExtender ID="NumericUpDownExtender3" TargetControlID="TextBox3" Width="150" ServiceUpPath="WebServiceNumbericUpDown.asmx" ServiceUpMethod="PreNumber" ServiceDownPath="WebServiceNumbericUpDown.asmx" ServiceDownMethod="NextNumber" Tag="3" runat="server"> </ajaxToolkit:NumericUpDownExtender> </form></body></html>
public class WebServiceNumbericUpDown : System.Web.Services.WebService {
public WebServiceNumbericUpDown () {
//Uncomment the following line if using designed components //InitializeComponent(); 
} [WebMethod] public int NextNumber(int current, string tag) { Random r1 = new Random(); return r1.Next(Math.Min(Math.Max(0,current), 1000), 1001); } [WebMethod] public int PreNumber(int current, string tag) { Random r2 = new Random(); return r2.Next(0, Math.Min(Math.Max(0,current), 1000)); }
}运行结果：
