实现XmlHttp跨域访问用ASP.NET后台代码_[Asp.Net教程] 最近项目需要实现XmlHttp的POST方法到另一服务器上的页面进行数据的更新,可是IE会提出“该页正在访问其控制范围之外的信息,是否继续?”等警告信息,而在其他浏览器上直接禁止掉,GOOGLE一下原来是XmlHttp的跨域访问问题,找了很多资料,说是提供很多解决方案,可是都没有用处。
原来由于浏览器的安全限制,网络连接的跨域访问时不被允许的。我们不能在浏览器端直接使用AJAX来跨域访问资源,但是在服务器端是没有这种跨域安全限制的。所以,我们只需要让服务器端帮我们完成“跨域访问”的工作,然后直接获取服务器端“跨域访问”的结果就可以了。分享下我的解决办法,希望能有所帮助。
CertCheck.aspx:
using MSXML2; namespace CA2 { public partial class CertCheck : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Request["resultid"] != null) { string s = Request["resultid"]; string[] result = s.Split(’@’); Label1.Text = result[1]; System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument(); xmlDoc.Load("VBR.xml"); System.Xml.XmlElement RegNode = xmlDoc.CreateElement("Id"); RegNode.InnerText = result[0]; xmlDoc.DocumentElement.AppendChild(RegNode); RegNode = xmlDoc.CreateElement("Serial"); RegNode.InnerText = result[1]; xmlDoc.DocumentElement.AppendChild(RegNode); MSXML2.XMLHTTP xh = new MSXML2.XMLHTTPClass(); xh.open("POST", "http://222.19.211.119/CAProcess.aspx", false, null, null); xh.setRequestHeader("Content-Type", "text/xml"); xh.setRequestHeader("Content-Type", "gb2312"); xh.send(xmlDoc.InnerXml); if (xh.readyState == 4) { if (xh.status == 200) { Label1.Text += "###" + xh.responseText; } } } } } }
VBR.xml:
PS: 在xh.send()中可以直接写参数, CertCheck.aspx:
using System.Net; using System.IO; namespace CA2 { public partial class CertCheck : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { if (Request["resultid"] != null) { string s = Request["resultid"]; string[] result = s.Split(’@’); Label1.Text = result[1]; string param = "Id="+result[0]+"&Serial="+result[1]; byte[] bs = Encoding.ASCII.GetBytes(param); HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create("http://222.19.211.119/CAProcess.aspx"); req.Method = "POST"; req.ContentType = "application/x-www-form-urlencoded"; req.ContentLength = bs.Length; Stream reqStream = req.GetRequestStream(); reqStream.Write(bs, 0, bs.Length); reqStream.Close(); HttpWebResponse myResponse = (HttpWebResponse)req.GetResponse(); StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.GetEncoding("GB2312")); string content = reader.ReadToEnd(); reader.Close(); myResponse.Close(); Label1.Text += "###" + content.ToString(); } } } }
CAProcess.aspx
protected void Page_Load(object sender, EventArgs e) { int Id = int.Parse(Request.Form["Id"]); string Serial = Request.Form["Serial"]; // Response.Write(Id.ToString()+" "+Serial); Response.End(); }
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