<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajaxToolkit" %>
<form id="form1" runat="server"> <ajaxToolkit:ToolkitScriptManager runat="Server" ID="ScriptManager1" />
<table style="width: 98%"> <tr> <td> <asp:UpdatePanel ID="UpdatePanel1" runat="server" > <ContentTemplate>
...其中页面使用ajaxToolkit:TextBoxWatermarkExtender
达到点击可输入,移开显示默认值的效果
<tr> <td class="style1"> 用户数<font color="red">*</font>:</td> <td class="style2" colspan="2"> <asp:TextBox ID="TextBoxUserCount" runat="server" MaxLength="10" Width="250px"></asp:TextBox> <ajaxToolkit:TextBoxWatermarkExtender ID="TextBoxUserCount_TextBoxWatermarkExtender" runat="server" TargetControlID="TextBoxUserCount" WatermarkCssClass="Watermark" WatermarkText="请输入正整数"> </ajaxToolkit:TextBoxWatermarkExtender> </td> <td class="style1"> </td> <td class="style1"> </td> <td class="style1"> </td> </tr>
</ContentTemplate> </asp:UpdatePanel> (编辑:李大同)
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