环境：  服务器  geoserver2.4.1

开发机访问服务器发布的wms 存在跨域问题，研究两天终于找到解决方案。

主要思路是： 使用jquery的ajax 代替Groserver的request， 然后将wms的请求地址转发到.net的处理程序， 使用.net的处理程序进行跨域处理。

 function mouseClick(e) {var layer = new Array();layer = map.getLayersByName("Simple_Geometry");if (layer != null)for (var i = 0; i < layer.length; i++) {map.removeLayer(layer[i]);}var wms_url = "http://10.72.4.219:8089/geoserver/xj/wms?";var params ={REQUEST: "GetFeatureInfo",BBOX: map.getExtent().toBBOX(),WIDTH: map.size.w,HEIGHT: map.size.h,X: e.xy.x,Y: e.xy.y,SERVICE: "WMS",QUERY_LAYERS: map.layers[0].params.LAYERS,INFO_FORMAT: 'text/html',FEATURE_COUNT: 50,Layers: 'xj:cswl_group',Styles: "",format: "application/vnd.ogc.gml",EXCEPTIONS: "application/vnd.ogc.se_xml",                    // Exception 类型srs: 'EPSG:4326'};var domainUrl = "crossDomain.ashx?URL=";var request = parpreUrl(wms_url, params);request = encodeURIComponent(encodeURIComponent(request));$.post(domainUrl + request, "", function (e) {document.getElementById('nodelist').innerHTML = e;});OpenLayers.Event.stop(e);}function parpreUrl(url, paramsObj) {for (var k in paramsObj) {url += (k + "=" + paramsObj[k] + "&");}return url;}

如果使用Groserver.ProxyHost ， 会遇到 triggerEvent未定义问题，所以使用了jqueyr的ajax代替 Geoserver.Request ，另外

 public void Proce***equest(HttpContext context){context.Response.ContentType = "text/html";string url = "";url = context.Request.QueryString["URL"].ToString();url = context.Server.UrlDecode(url);HttpWebRequest loHttp = (HttpWebRequest)WebRequest.Create(url);loHttp.Timeout = 10000;     // 10 secsloHttp.UserAgent = "Web Client";HttpWebResponse loWebResponse = (HttpWebResponse)loHttp.GetResponse();Encoding enc = Encoding.GetEncoding(65001);StreamReader loResponseStream = new StreamReader(loWebResponse.GetResponseStream(), enc);string lcHtml = loResponseStream.ReadToEnd();context.Response.Write(lcHtml);loWebResponse.Close();loResponseStream.Close();}

这样就可以解决 跨域问题