如何在代码隐藏中检查请求是否为Ajax-ASP.NET Webforms

您可以创建自己的扩展方法，就像MVC代码中的方法一样

例如

public static bool IsAjaxRequest(this HttpRequest request){    if (request == null)    {        throw new ArgumentNullException("request");    }    return (request["X-Requested-With"] == "XMLHttpRequest") || ((request.Headers != null) && (request.Headers["X-Requested-With"] == "XMLHttpRequest"));}

查尔斯· HTH

编辑： 实际上，回调请求也是ajax请求，

    public static bool IsAjaxRequest(this HttpRequest request)    {        if (request == null)        { throw new ArgumentNullException("request");        }        var context = HttpContext.Current;        var isCallbackRequest = false;// callback requests are ajax requests        if (context != null && context.CurrentHandler != null && context.CurrentHandler is System.Web.UI.Page)        { isCallbackRequest = ((System.Web.UI.Page)context.CurrentHandler).IsCallback;        }        return isCallbackRequest || (request["X-Requested-With"] == "XMLHttpRequest") || (request.Headers["X-Requested-With"] == "XMLHttpRequest");    }