如何在代码隐藏中检查请求是否为 ajax - ASP.NET Webforms [英] How to check if request is ajax or not in codebehind - ASP.NET Webforms

问题描述

我尝试了 Request.IsAjaxRequest 但这在 WebForms 中不存在.我正在进行 JQuery ajax 调用.如何在 C# 中检查这是否是 ajax 请求?

I tried the Request.IsAjaxRequest but this does not exist in WebForms. I am making a JQuery ajax call. How do I check if this is a ajax request or not in C#?

推荐答案

您可以创建自己的扩展方法，就像 MVC 代码

You could create your own extension method much like the one in the MVC code

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"));
}

HTH，
查尔斯

HTHs,
Charles

其实回调请求也是ajax请求，

Actually Callback requests are also ajax requests,

    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");
    }

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