如何转义 HTML 或取消转义 HTML？

Question

我有一个使用 jquerybuilder 返回结果的查询，但结果为空，因为它需要将"<" 转换为 html 结果中的"<";。当我从搜索栏中启动小于“某物”时，它显示空结果

这是我要添加此更改的代码：

// GET: Search/GetJsonForQuery
public JsonResult GetJsonForQuery(ObjectJson serializedJson) {

    if (serializedJson.MainObjects == null) {
        JsonResult result = Json(new {
            updated = DateTime.UtcNow.ToString("o"),
            errorNoItemSelected = true
        },
        JsonRequestBehavior.AllowGet);

        result.MaxJsonLength = Int32.MaxValue;
        return result;
    }

    if (!IsColumnSelected(serializedJson)) {
        JsonResult result = Json(new {
            updated = DateTime.UtcNow.ToString("o"),
            errorNoColumnSelected = true
        },
        JsonRequestBehavior.AllowGet);

        result.MaxJsonLength = Int32.MaxValue;
        return result;
    }
}

Answer 1

不太确定确切的问题？有多种方法可以转义/取消转义 HTML。下面建议的答案只需要System.Net

using System.Net;
void Main()
{
   string encoded = WebUtility.HtmlEncode("<p>hello</p>");
   
   //&lt;p&gt;take me to the river&lt;/p&gt;
   Console.WriteLine($"encoded: {encoded}");

   string decoded = WebUtility.HtmlDecode("&lt;p&gt;hello&lt;/p&gt;");
   //<p>hello</p>
   Console.WriteLine($"decoded: {decoded}");

}
public class FormatObject {

        public int Id { get; set; }

        public int IdObject { get; set; }

        public string Conditions { get; set; }

        public List<int> SelectedAttributesId { get; set; }

        public override string ToString() {
            string result = "[" + Id + "," + IdObject + ", \"" + Conditions + "\"";
            if (SelectedAttributesId != null)
                result += ", [" + string.Join(",", SelectedAttributesId.ToArray()) + "]";

            return result + "]";
        }

    }
}