使用C＃获取IP地理位置WPF [英] Get IP geolocation using C# & WPF
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问题描述
我正在做一个模块，可以使用我使用的设备的IP地址显示我的城市，州，经度和纬度。
但是，我无法理解。下面，我介绍了另一个网站的代码：
内部GeoLoc GetMyGeoLocation（）
{
尝试
{
//创建一个请求到geoiptool.com
var request = WebRequest.Create（new Uri（http://geoiptool.com/data.php））as HttpWebRequest的;
if（request！= null）
{
//设置请求用户代理
request.UserAgent =Mozilla / 4.0（compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727）;
//获取响应
使用（var webResponse =（request.GetResponse（）as HttpWebResponse））
if（webResponse！= null）
using（var reader = new StreamReader（webResponse.GetResponseStream（）））
{
//获取XML文档
var doc = new XmlDocument（）;
doc.Load（reader）;
//现在我们解析XML文档
var nodes = doc.GetElementsByTagName（marker）;
Guard.AssertCondition（nodes.Count> 0，nodes，new object（））;
//确保循环前有节点
// if（nodes.Count> 0）
// {
//获取第一个响应
var marker = nodes [0]作为XmlElement;
Guard.AssertNotNull（marker，marker）;
//获取数据并返回
_geoLoc.City = marker.GetAttribute（city）;
_geoLoc.Country = marker.GetAttribute（country）;
_geoLoc.Code = marker.GetAttribute（code）;
_geoLoc.Host = marker.GetAttribute（host）;
_geoLoc.Ip = marker.GetAttribute（ip）;
_geoLoc.Latitude = marker.GetAttribute（lat）;
_geoLoc.Lognitude = marker.GetAttribute（lng）;
_geoLoc.State = GetMyState（_geoLoc.Latitude，_geoLoc.Lognitude）;
return _geoLoc;
//}
}
}
//只有在出现错误时才能达到此代码
//否标记节点或许？
返回新的GeoLoc（）;
}
catch（Exception ex）
{
throw;
}
}
所有的代码都没有问题。唯一的问题是 _geoLoc ，它会在每一个下面都提示出红线。这是什么意思？谢谢。
解决方案
正如其他人指出的，_geoLoc没有定义。尝试像这样
内部GeoLoc GetMyGeoLocation（）
{
尝试
{
//创建一个请求到geoiptool.com
var request = WebRequest.Create（new Uri（http://geoiptool.com/data.php））作为HttpWebRequest;
if（request！= null）
{
//设置请求用户代理
request.UserAgent =Mozilla / 4.0（compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727）;
//获取响应
使用（var webResponse =（request.GetResponse（）as HttpWebResponse））
if（webResponse！= null）
using（var reader = new StreamReader（webResponse.GetResponseStream（）））
{
//获取XML文档
var doc = new XmlDocument（）;
doc.Load（reader）;
//现在我们解析XML文档
var nodes = doc.GetElementsByTagName（marker）;
Guard.AssertCondition（nodes.Count> 0，nodes，new object（））;
//确保循环前有节点
// if（nodes.Count> 0）
// {
//获取第一个响应
var marker = nodes [0]作为XmlElement;
Guard.AssertNotNull（marker，marker）;
var _geoLoc = new GeoLoc（）;
//获取数据并返回
_geoLoc.City = marker.GetAttribute（city）;
_geoLoc.Country = marker.GetAttribute（country）;
_geoLoc.Code = marker.GetAttribute（code）;
_geoLoc.Host = marker.GetAttribute（host）;
_geoLoc.Ip = marker.GetAttribute（ip）;
_geoLoc.Latitude = marker.GetAttribute（lat）;
_geoLoc.Lognitude = marker.GetAttribute（lng）;
_geoLoc.State = GetMyState（_geoLoc.Latitude，_geoLoc.Lognitude）;
return _geoLoc;
//}
}
}
//只有在出现错误时才能达到此代码
//否标记节点或许？
返回新的GeoLoc（）;
}
catch（Exception ex）
{
throw;
}
}
I am doing a module which can display my city, state, latitude and longitude, using IP address of the device I am using. However, I can't get it right. Below, there is my code which I referred to another website:
internal GeoLoc GetMyGeoLocation()
{
try
{
//create a request to geoiptool.com
var request = WebRequest.Create(new Uri("http://geoiptool.com/data.php")) as HttpWebRequest;
if (request != null)
{
//set the request user agent
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727)";
//get the response
using (var webResponse = (request.GetResponse() as HttpWebResponse))
if (webResponse != null)
using (var reader = new StreamReader(webResponse.GetResponseStream()))
{
//get the XML document
var doc = new XmlDocument();
doc.Load(reader);
//now we parse the XML document
var nodes = doc.GetElementsByTagName("marker");
Guard.AssertCondition(nodes.Count > 0,"nodes",new object());
//make sure we have nodes before looping
//if (nodes.Count > 0)
//{
//grab the first response
var marker = nodes[0] as XmlElement;
Guard.AssertNotNull(marker, "marker");
//get the data and return it
_geoLoc.City = marker.GetAttribute("city");
_geoLoc.Country = marker.GetAttribute("country");
_geoLoc.Code = marker.GetAttribute("code");
_geoLoc.Host = marker.GetAttribute("host");
_geoLoc.Ip = marker.GetAttribute("ip");
_geoLoc.Latitude = marker.GetAttribute("lat");
_geoLoc.Lognitude = marker.GetAttribute("lng");
_geoLoc.State = GetMyState(_geoLoc.Latitude, _geoLoc.Lognitude);
return _geoLoc;
//}
}
}
// this code would only be reached if something went wrong
// no "marker" node perhaps?
return new GeoLoc();
}
catch (Exception ex)
{
throw;
}
}
All the code has no problem. The only problem would be the _geoLoc, it keep prompt out red lines below each of them. What does it mean? Thank you.
解决方案
As others have pointed out, _geoLoc isn't defined. Try something like this
internal GeoLoc GetMyGeoLocation()
{
try
{
//create a request to geoiptool.com
var request = WebRequest.Create(new Uri("http://geoiptool.com/data.php")) as HttpWebRequest;
if (request != null)
{
//set the request user agent
request.UserAgent = "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727)";
//get the response
using (var webResponse = (request.GetResponse() as HttpWebResponse))
if (webResponse != null)
using (var reader = new StreamReader(webResponse.GetResponseStream()))
{
//get the XML document
var doc = new XmlDocument();
doc.Load(reader);
//now we parse the XML document
var nodes = doc.GetElementsByTagName("marker");
Guard.AssertCondition(nodes.Count > 0,"nodes",new object());
//make sure we have nodes before looping
//if (nodes.Count > 0)
//{
//grab the first response
var marker = nodes[0] as XmlElement;
Guard.AssertNotNull(marker, "marker");
var _geoLoc = new GeoLoc();
//get the data and return it
_geoLoc.City = marker.GetAttribute("city");
_geoLoc.Country = marker.GetAttribute("country");
_geoLoc.Code = marker.GetAttribute("code");
_geoLoc.Host = marker.GetAttribute("host");
_geoLoc.Ip = marker.GetAttribute("ip");
_geoLoc.Latitude = marker.GetAttribute("lat");
_geoLoc.Lognitude = marker.GetAttribute("lng");
_geoLoc.State = GetMyState(_geoLoc.Latitude, _geoLoc.Lognitude);
return _geoLoc;
//}
}
}
// this code would only be reached if something went wrong
// no "marker" node perhaps?
return new GeoLoc();
}
catch (Exception ex)
{
throw;
}
}
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