HTML不包含名为 CssClass 的属性。



ASP.NET控件包含 property 名为 CssClass ，它映射到名为 class 的HTML属性。此属性包含CSS文件中定义的类名列表。这些CSS类的样式将应用于元素。



您提供的值不是CSS类名;它是内联样式定义。因此，您需要使用样式属性：

 data.Attributes [  style] =   text-decoration：line-through; color：red;; 

或者，您可以使用 Style property：

 data.Style [  text-decoration] =   line-through; 
 data.Style [  color] =   red; 

你也会需要检索StrikeLabel控件的文本;在它上面调用 .ToString（）只会返回类型名称。



文本很可能是True，这与true的值不同，因此您需要修改测试。

标签strikeLabel =（标签）e.Item.FindControl（  StrikeLabel跨度>）; 
 string  strike =（strikeLabel！=  null ）？ strikeLabel.Text： string  .Empty; 
 if （ string  .Equals（strike，   True，StringComparison.OrdinalIgnoreCase））
 {
 ... 
} 

I have a simple listview (in ASP.NET website using C#) with two columns - data and strike. If the value of strike is 'true', i want the contents of 'data' to strikeout. My listview code is as follows:

<asp:ListView ID="ListView1" runat="server" DataKeyNames="FSID" DataSourceID="SqlDataSource1" GroupItemCount="3" OnItemDataBound="ListView1_ItemDataBound">

            <GroupTemplate>
                <tr id="itemPlaceholderContainer" runat="server">
                    <td id="itemPlaceholder" runat="server"></td>
                </tr>
            </GroupTemplate>

            <ItemTemplate>
                <td runat="server" style="">FSID:
                   <asp:Label ID="DataLabel" runat="server" Text='<%# Eval("Data") %>' />
                    <br />
                    <asp:Label ID="strikeLabel" runat="server" Text='<%# Eval("strike") %>' />
                    <br />
               </td>
            </ItemTemplate>

In code behind i have:

protected void ListView1_ItemDataBound(object sender, ListViewItemEventArgs e)
    {
        string strike = e.Item.FindControl("StrikeLabel").ToString();
        if(strike == "true")
        {
            Label data = e.Item.FindControl("DataLabel") as Label;
            data.Attributes.Add("CssClass", "text-decoration:line-through; color:red;");
        }
    }

This does not seem to work, as i still get normal text in data filed

Kindly advise.

Thanks for your help

HTML does not contain an attribute called CssClass.

ASP.NET controls contain a property called CssClass, which maps to the HTML attribute called class. This attribute contains a list of class names defined in your CSS file(s). The styles for those CSS classes will be applied to the element.

The value you're supplying is not a CSS class name; it is an inline style definition. Therefore, you need to use the style attribute:

data.Attributes["style"] = "text-decoration:line-through; color:red;";

Alternatively, you could use the Style property:

data.Style["text-decoration"] = "line-through";
data.Style["color"] = "red";

You'll also need to retrieve the text of the "StrikeLabel" control; calling .ToString() on it will only return the type name.

The text will most likely be "True", which is not the same value as "true", so you'll need to modify your test.

Label strikeLabel = (Label)e.Item.FindControl("StrikeLabel");
string strike = (strikeLabel != null) ? strikeLabel.Text : string.Empty;
if (string.Equals(strike, "True", StringComparison.OrdinalIgnoreCase))
{
    ...
}