Question

以下是我认为可行的代码

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
<style type="text/css">
                .watermark{
                    color: Gray;
                    background-color: #dddddd;
                    font-size: smaller;
                    font-style: italic;
                }
</style>
</head>

<body>
    <form id="form1" runat="server">

    <div>

            <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>

            <asp:TextBox ID="txtInput" runat="server" AutoPostBack="True" 
            ontextchanged="txtInput_TextChanged"></asp:TextBox>


            <cc1:TextBoxWatermarkExtender ID="txtInput_TextBoxWatermarkExtender" 
                runat="server" Enabled="True" TargetControlID="txtInput"  CssClass="watermark"
                WatermarkText="Some text">
            </cc1:TextBoxWatermarkExtender>

但我收到错误Type 'AjaxControlToolkit.TextBoxWatermarkExtender' does not have a public property named 'CssClass'.

TextBoxWatermarkExtender有哪些类与CssClass相同？或者还有另一种方法可以使这项工作吗？

如何解决？

Answer 1

以下是解决方案TextBoxWatermarkExtender WatermarkCssClass overwrites TextBox CssClass

CssClass的等效类是WatermarkCssClass

更正后的代码：

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
<style type="text/css">
                .watermark{
                    color: Gray;
                    background-color: #dddddd;
                    font-size: smaller;
                    font-style: italic;
                }
</style>
</head>

<body>
    <form id="form1" runat="server">

    <div>

            <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>

            <asp:TextBox ID="txtInput" runat="server" AutoPostBack="True" 
            ontextchanged="txtInput_TextChanged"></asp:TextBox>


            <cc1:TextBoxWatermarkExtender ID="txtInput_TextBoxWatermarkExtender" 
                runat="server" Enabled="True" TargetControlID="txtInput"  WatermarkCssClass="watermark"
                WatermarkText="Some text">
            </cc1:TextBoxWatermarkExtender>

按F5时，输出

enter image description here

TextBoxWatermarkExtender属性等同于CssClass

1 个答案: