如何在代码隐藏中检查请求是否是ajax - ASP.NET Webforms

Question

我试过了,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？

Answer 1

您可以创建自己的扩展方法,就像MVC代码中的扩展方法一样

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"));
}

HTHs,
查尔斯

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");
    }

Answer 2

尝试检查 ScriptManager IsInAsyncPostBack 是否：

ScriptManager.GetCurrent(Page).IsInAsyncPostBack