C# 如何确定服务器端C上的浏览器窗口大小#
如何获取当前打开的浏览器屏幕窗口的确切高度和宽度?您可以使用Javascript获取视口宽度和高度。然后通过隐藏的表单输入或ajax将值传回 简单地说 使用隐藏形式输入的完整方法 假设您有: 首先,添加这些隐藏的表单输入以存储宽度和高度,直到回发C# 如何确定服务器端C上的浏览器窗口大小#,c#,asp.net,.net,C#,Asp.net,.net,如何获取当前打开的浏览器屏幕窗口的确切高度和宽度?您可以使用Javascript获取视口宽度和高度。然后通过隐藏的表单输入或ajax将值传回 简单地说 使用隐藏形式输入的完整方法 假设您有: 首先,添加这些隐藏的表单输入以存储宽度和高度,直到回发 <asp:HiddenField ID="width" runat="server" /> <asp:HiddenField ID="height" runat="server" /> 此方法在回发时提供高度和宽度,但在初始页
<asp:HiddenField ID="width" runat="server" />
<asp:HiddenField ID="height" runat="server" />
此方法在回发时提供高度和宽度,但在初始页面加载时不提供
关于UpdatePanel的注意事项:如果您是通过UpdatePanel发回的,我相信隐藏的输入需要在UpdatePanel中
或者,您可以通过ajax调用发回这些值。如果要对窗口大小调整做出反应,这将非常有用
jquery 3.1.1的更新
我必须将JavaScript更改为:
$("#width").val($(window).width());
$("#height").val($(window).height());
下面是你将如何做到这一点 编写一个javascript函数,该函数在调整窗口大小时触发
window.onresize = function(event) {
var height=$(window).height();
var width=$(window).width();
$.ajax({
url: "/getwindowsize.ashx",
type: "POST",
data : { Height: height,
Width:width,
selectedValue:selectedValue },
contentType: "application/json; charset=utf-8",
dataType: "json",
success: function (response) {
// do stuff
}
}
处理程序的代码隐藏:
public class getwindowsize : IHttpHandler {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "application/json";
string Height = context.Request.QueryString["Height"];
string Width = context.Request.QueryString["Width"];
}
有一个解决方案可以解决页面加载问题(在页面加载完成之前无法获取大小):创建userControl:
<%@ Control Language="VB" AutoEventWireup="false" CodeFile="ClientSizeDetector.ascx.vb" Inherits="Project_UserControls_ClientSizeDetector" %>
<%If (IsFirstTime) Then%>
<script type="text/javascript">
var pageURL = window.location.href.search(/\?/) > 0 ? "&" : "?";
window.location.href = window.location.href + pageURL + "clientHeight=" + window.innerHeight + "&clientWidth=" + window.innerWidth;
</script>
<%End If%>
因此,之后,您可以调用控件属性我使用regex from检查
用户代理
字符串。尽管它说它最后一次更新是在2014年,但在我测试的设备上它是准确的
以下是我在提交此答案时从他们那里得到的C#
代码:
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Text.RegularExpressions" %>
<%
string u = Request.ServerVariables["HTTP_USER_AGENT"];
Regex b = new Regex(@"(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|mobile.+firefox|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows ce|xda|xiino", RegexOptions.IgnoreCase | RegexOptions.Multiline);
Regex v = new Regex(@"1207|6310|6590|3gso|4thp|50[1-6]i|770s|802s|a wa|abac|ac(er|oo|s\-)|ai(ko|rn)|al(av|ca|co)|amoi|an(ex|ny|yw)|aptu|ar(ch|go)|as(te|us)|attw|au(di|\-m|r |s )|avan|be(ck|ll|nq)|bi(lb|rd)|bl(ac|az)|br(e|v)w|bumb|bw\-(n|u)|c55\/|capi|ccwa|cdm\-|cell|chtm|cldc|cmd\-|co(mp|nd)|craw|da(it|ll|ng)|dbte|dc\-s|devi|dica|dmob|do(c|p)o|ds(12|\-d)|el(49|ai)|em(l2|ul)|er(ic|k0)|esl8|ez([4-7]0|os|wa|ze)|fetc|fly(\-|_)|g1 u|g560|gene|gf\-5|g\-mo|go(\.w|od)|gr(ad|un)|haie|hcit|hd\-(m|p|t)|hei\-|hi(pt|ta)|hp( i|ip)|hs\-c|ht(c(\-| |_|a|g|p|s|t)|tp)|hu(aw|tc)|i\-(20|go|ma)|i230|iac( |\-|\/)|ibro|idea|ig01|ikom|im1k|inno|ipaq|iris|ja(t|v)a|jbro|jemu|jigs|kddi|keji|kgt( |\/)|klon|kpt |kwc\-|kyo(c|k)|le(no|xi)|lg( g|\/(k|l|u)|50|54|\-[a-w])|libw|lynx|m1\-w|m3ga|m50\/|ma(te|ui|xo)|mc(01|21|ca)|m\-cr|me(rc|ri)|mi(o8|oa|ts)|mmef|mo(01|02|bi|de|do|t(\-| |o|v)|zz)|mt(50|p1|v )|mwbp|mywa|n10[0-2]|n20[2-3]|n30(0|2)|n50(0|2|5)|n7(0(0|1)|10)|ne((c|m)\-|on|tf|wf|wg|wt)|nok(6|i)|nzph|o2im|op(ti|wv)|oran|owg1|p800|pan(a|d|t)|pdxg|pg(13|\-([1-8]|c))|phil|pire|pl(ay|uc)|pn\-2|po(ck|rt|se)|prox|psio|pt\-g|qa\-a|qc(07|12|21|32|60|\-[2-7]|i\-)|qtek|r380|r600|raks|rim9|ro(ve|zo)|s55\/|sa(ge|ma|mm|ms|ny|va)|sc(01|h\-|oo|p\-)|sdk\/|se(c(\-|0|1)|47|mc|nd|ri)|sgh\-|shar|sie(\-|m)|sk\-0|sl(45|id)|sm(al|ar|b3|it|t5)|so(ft|ny)|sp(01|h\-|v\-|v )|sy(01|mb)|t2(18|50)|t6(00|10|18)|ta(gt|lk)|tcl\-|tdg\-|tel(i|m)|tim\-|t\-mo|to(pl|sh)|ts(70|m\-|m3|m5)|tx\-9|up(\.b|g1|si)|utst|v400|v750|veri|vi(rg|te)|vk(40|5[0-3]|\-v)|vm40|voda|vulc|vx(52|53|60|61|70|80|81|83|85|98)|w3c(\-| )|webc|whit|wi(g |nc|nw)|wmlb|wonu|x700|yas\-|your|zeto|zte\-", RegexOptions.IgnoreCase | RegexOptions.Multiline);
if ((b.IsMatch(u) || v.IsMatch(u.Substring(0, 4)))) {
Response.Redirect("http://detectmobilebrowser.com/mobile");
}
%>
这是一种Ajax、
asxh
处理程序和会话变量方法:
处理程序:
using System;
using System.Web;
public class windowSize : IHttpHandler , System.Web.SessionState.IRequiresSessionState {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "application/json";
var json = new System.Web.Script.Serialization.JavaScriptSerializer();
var output = json.Serialize(new { isFirst = context.Session["BrowserWidth"] == null });
context.Response.Write(output);
context.Session["BrowserWidth"] = context.Request.QueryString["Width"];
context.Session["BrowserHeight"] = context.Request.QueryString["Height"];
}
public bool IsReusable
{
get { throw new NotImplementedException(); }
}
}
window.onresize = function (event) {
SetWidthHeight();
}
function SetWidthHeight() {
var height = $(window).height();
var width = $(window).width();
$.ajax({
url: "windowSize.ashx",
data: {
'Height': height,
'Width': width
},
contentType: "application/json; charset=utf-8",
dataType: "json"
}).done(function (data) {
if (data.isFirst) {
window.location.reload();
};
}).fail(function (xhr) {
alert("Problem to retrieve browser size.");
});
}
$(function () {
SetWidthHeight();
});
...
<script src="Scripts/jquery-1.9.1.min.js"></script>
<script src="Scripts/BrowserWindowSize.js"></script>
...
<asp:Label ID="lblDim" runat="server" Text=""></asp:Label>
...
protected void Page_Load(object sender, EventArgs e)
{
if (Session["BrowserWidth"] != null)
{
// Do all code here to avoid double execution first time
// ....
lblDim.Text = "Width: " + Session["BrowserWidth"] + " Height: " + Session["BrowserHeight"];
}
}
Javascript:
using System;
using System.Web;
public class windowSize : IHttpHandler , System.Web.SessionState.IRequiresSessionState {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "application/json";
var json = new System.Web.Script.Serialization.JavaScriptSerializer();
var output = json.Serialize(new { isFirst = context.Session["BrowserWidth"] == null });
context.Response.Write(output);
context.Session["BrowserWidth"] = context.Request.QueryString["Width"];
context.Session["BrowserHeight"] = context.Request.QueryString["Height"];
}
public bool IsReusable
{
get { throw new NotImplementedException(); }
}
}
window.onresize = function (event) {
SetWidthHeight();
}
function SetWidthHeight() {
var height = $(window).height();
var width = $(window).width();
$.ajax({
url: "windowSize.ashx",
data: {
'Height': height,
'Width': width
},
contentType: "application/json; charset=utf-8",
dataType: "json"
}).done(function (data) {
if (data.isFirst) {
window.location.reload();
};
}).fail(function (xhr) {
alert("Problem to retrieve browser size.");
});
}
$(function () {
SetWidthHeight();
});
...
<script src="Scripts/jquery-1.9.1.min.js"></script>
<script src="Scripts/BrowserWindowSize.js"></script>
...
<asp:Label ID="lblDim" runat="server" Text=""></asp:Label>
...
protected void Page_Load(object sender, EventArgs e)
{
if (Session["BrowserWidth"] != null)
{
// Do all code here to avoid double execution first time
// ....
lblDim.Text = "Width: " + Session["BrowserWidth"] + " Height: " + Session["BrowserHeight"];
}
}
在aspx文件上:
using System;
using System.Web;
public class windowSize : IHttpHandler , System.Web.SessionState.IRequiresSessionState {
public void ProcessRequest (HttpContext context) {
context.Response.ContentType = "application/json";
var json = new System.Web.Script.Serialization.JavaScriptSerializer();
var output = json.Serialize(new { isFirst = context.Session["BrowserWidth"] == null });
context.Response.Write(output);
context.Session["BrowserWidth"] = context.Request.QueryString["Width"];
context.Session["BrowserHeight"] = context.Request.QueryString["Height"];
}
public bool IsReusable
{
get { throw new NotImplementedException(); }
}
}
window.onresize = function (event) {
SetWidthHeight();
}
function SetWidthHeight() {
var height = $(window).height();
var width = $(window).width();
$.ajax({
url: "windowSize.ashx",
data: {
'Height': height,
'Width': width
},
contentType: "application/json; charset=utf-8",
dataType: "json"
}).done(function (data) {
if (data.isFirst) {
window.location.reload();
};
}).fail(function (xhr) {
alert("Problem to retrieve browser size.");
});
}
$(function () {
SetWidthHeight();
});
...
<script src="Scripts/jquery-1.9.1.min.js"></script>
<script src="Scripts/BrowserWindowSize.js"></script>
...
<asp:Label ID="lblDim" runat="server" Text=""></asp:Label>
...
protected void Page_Load(object sender, EventArgs e)
{
if (Session["BrowserWidth"] != null)
{
// Do all code here to avoid double execution first time
// ....
lblDim.Text = "Width: " + Session["BrowserWidth"] + " Height: " + Session["BrowserHeight"];
}
}
来源:这里是我如何使用Cookies解决的: 首先,在网站主脚本中:
var browserWindowSize = getCookie("_browserWindowSize");
var newSize = $(window).width() + "," + $(window).height();
var reloadForCookieRefresh = false;
if (browserWindowSize == undefined || browserWindowSize == null || newSize != browserWindowSize) {
setCookie("_browserWindowSize", newSize, 30);
reloadForCookieRefresh = true;
}
if (reloadForCookieRefresh)
window.location.reload();
function setCookie(name, value, days) {
var expires = "";
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
expires = "; expires=" + date.toUTCString();
}
document.cookie = name + "=" + (value || "") + expires + "; path=/";
}
function getCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') c = c.substring(1, c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length, c.length);
}
return null;
}
var-browserWindowSize=getCookie(“_-browserWindowSize”);
var newSize=$(窗口).width()+,“+$(窗口).height();
var reloadforCookiierefresh=false;
如果(BrowserWindowsSize==undefined | | BrowserWindowsSize==null | | | newSize!=BrowserWindowsSize){
setCookie(“浏览器窗口大小”,新闻大小,30);
RELOADFORCOOKEIEREFRESH=真;
}
if(重新加载ForCookiierefresh)
window.location.reload();
函数setCookie(名称、值、天数){
var=”;
如果(天){
变量日期=新日期();
date.setTime(date.getTime()+(天*24*60*60*1000));
expires=“;expires=“+date.toutString();
}
document.cookie=name+“=”+(值| |“”)+expires+“path=/”;
}
函数getCookie(名称){
变量nameEQ=name+“=”;
var ca=document.cookie.split(“;”);
对于(变量i=0;i
和内部MVC动作过滤器:
public class SetCurrentRequestDataFilter : ActionFilterAttribute
{
public override void OnActionExecuting(ActionExecutingContext filterContext)
{
// currentRequestService is registered per web request using IoC
var currentRequestService = iocResolver.Resolve<ICurrentRequestService>();
if (filterContext.HttpContext.Request.Cookies.AllKeys.Contains("_browserWindowSize"))
{
var browserWindowSize = filterContext.HttpContext.Request.Cookies.Get("_browserWindowSize").Value.Split(',');
currentRequestService.browserWindowWidth = int.Parse(browserWindowSize[0]);
currentRequestService.browserWindowHeight = int.Parse(browserWindowSize[1]);
}
}
}
公共类SetCurrentRequestDataFilter:ActionFilterAttribute
{
公共覆盖无效OnActionExecuting(ActionExecutingContext filterContext)
{
//使用IoC为每个web请求注册currentRequestService
var currentRequestService=iocResolver.Resolve();
if(filterContext.HttpContext.Request.Cookies.AllKeys.Contains(“\u BrowserWindowsSize”))
{
var BrowserWindowsSize=filterContext.HttpContext.Request.Cookies.Get(“_BrowserWindowsSize”).Value.Split(“,”);
currentRequestService.browserWindowWidth=int.Parse(browserWindowSize[0]);
currentRequestService.browserWindowHeight=int.Parse(browserWindowSize[1]);
}
}
}
我想您必须使用JavaScript检测它,然后通过AJAX调用将其传递回服务器。在服务器端呈现页面之前,无法确定此信息。是否检查了document.body.clientWidth
document.body.clientHeight
C代码在服务器上运行,而不是在客户端上运行。没问题,很高兴我能提供帮助。这可以将值输入到隐藏的输入中,但javascript会在Page_Load事件之后触发,而此时我需要窗口高度。页面无法知道页面加载事件中的窗口大小吗?matthew_360,请查看页面中的page.Request.Params[]_Load@tony那么如何在页面加载之前获得窗口大小???我不明白这个页面。Request.Params thingy!!有人能解释一下怎么做吗?@alinem,第一个例子将窗口大小放在隐藏的输入中,如果你查看Page.Request.Params[“width”],你可以在页面加载(甚至是OnInit)中看到这个值。如果这不起作用,请查看隐藏值的ClientID,看看id是什么(可能类似于myUserControl.Width),如果没有事件限制,这不是一个很好的解决方案。请谷歌的概念。总而言之,每次在客户端发生调整大小事件时,您都会向服务器发出AJAX调用,在Chrome和FF中,当用户单击并拖动浏览器宽度时,这种情况每秒可能发生数十次。这太多AJAX调用了!