运算符“+”不能应用于MvcHtmlString类型的操作数

MvcHtmlString .ToString() )或者换一种方式。

您也可以编写一个扩展方法,请参见以下示例: How to concatenate several MvcHtmlString instances

就我个人而言,我使用了一个非常精简的实用程序方法,它利用了string类中现有的Concat()方法:

public static MvcHtmlString Concat(params object[] args)
{
    return new MvcHtmlString(string.Concat(args));
}

@Anders方法作为一种推广方法。这样做的好处是,当系统自动对每个对象调用ToString时,您可以将几个MvcHtmlStrings与其他值(如normal strings、int等)附加在一起。

    /// <summary>
    /// Concatenates MvcHtmlStrings together
    /// </summary>
    public static MvcHtmlString Append(this MvcHtmlString first, params object[] args) {
        return new MvcHtmlString(string.Concat(args));
    }

MvcHtmlString result = new MvcHtmlString("");
MvcHtmlString div = new MvcHtmlString("<div>");
MvcHtmlString closediv = new MvcHtmlString("</div>");

result = result.Append(div, "bob the fish", closediv);
result = result.Append(div, "bob the fish", closediv);

会的 如果我们能让接线员过载就更好了+

这是我的方法:

        // MvcTools.ExtensionMethods.MvcHtmlStringExtensions.Concat
        public static MvcHtmlString Concat(params MvcHtmlString[] strings)
        {
            System.Text.StringBuilder sb = new System.Text.StringBuilder();

            foreach (MvcHtmlString thisMvcHtmlString in strings)
            {
                if (thisMvcHtmlString != null)
                    sb.Append(thisMvcHtmlString.ToString());
            } // Next thisMvcHtmlString

            MvcHtmlString res = MvcHtmlString.Create(sb.ToString());
            sb.Clear();
            sb = null;

            return res;
        } // End Function Concat

        public static MvcHtmlString Concat(params MvcHtmlString[] value)
        {
            StringBuilder sb = new StringBuilder();
            foreach (MvcHtmlString v in value) if (v != null) sb.Append(v.ToString());
            return MvcHtmlString.Create(sb.ToString());
        }

以@mike nelson为例,这是最适合我的解决方案:

@foreach (var item in Model)
{
    MvcHtmlString num = new MvcHtmlString(item.Number + "-" + item.SubNumber);
    <p>@num</p>
}