asp.net (C #) write a cookie problem across domains and across domains _ practical tips

The solution is:

Copy Code code as follows:

The called page in www.B.com needs to write a P3P header to unblock ie from writing cookies
Context. Response.AddHeader ("P3P", "Cp=cao PSA our");

Www.A.com in the www.B.com through Ajax call content, is cross-domain access, need to use JSONP, in order to match its work need to add the following two sentences, generate JSONP return
Context. Response.ContentType = "Text/plain";
Context. Response.Write (String. Format ("{0} (' OK ')", context. Request["Callback"]);

Copy Code code as follows:

JSONP calls for Cross-domain access
Jquery.ajax ({
Url:url,
Type: ' Get ',
Data:data,
DataType: ' Jsonp ',
Success:function (data) {
Window.location.href = Tourl;
}
});