我有一个Windows窗体(WinForm)计费产品,该产品当前正在运行.Net Framework 4.6.1,并在Visual Studio 2015中进行维护。
我们被要求修改映射工具,该工具需要一个物理地址并返回纬度/经度网格坐标。
我得到了用于测试的密钥,并将其应用到了代码中。
private void GoogleGeoCodeSearch(LocationRecord currentRecord, String key)
{
var street = String.Format("{0}", currentRecord.street_name).Trim();
var city = String.Format("{0}", currentRecord.city).Trim();
var state = String.Format("{0}", currentRecord.state).Trim();
var postal = String.Format("{0}", currentRecord.postal_code).Trim();
var country = (state.Length == 2 && STATES.Contains(state)) ? "USA" : String.Format("{0}", currentRecord.country).Trim();
var address = String.Format("{0}, {1}, {2}, {3} {4}", street, city, state, postal, country).Replace("-", String.Empty).Replace("'", String.Empty);
var requestUri = string.Format("http://maps.googleapis.com/maps/api/geocode/xml?address={0}&sensor=false®ion={1}&key={2}", Uri.EscapeDataString(address), country, key);
var request = System.Net.WebRequest.Create(requestUri);
using (var response = request.GetResponse())
{
var ok = false;
var title = String.Format("{0}::Google API WebRequest", _title);
var source = "response stream";
var element = "XDocument";
var xdoc = System.Xml.Linq.XDocument.Load(response.GetResponseStream());
if (xdoc != null)
{
source = element;
element = "GeocodeResponse";
var geoResponse = xdoc.Element(element);
if (geoResponse != null)
{
source = element;
element = "result";
var result = geoResponse.Element(element);
if (result != null)
{
source = element;
element = "geometry";
var geometry = result.Element(element);
if (geometry != null)
{
source = element;
element = "location";
var locationElement = geometry.Element(element);
if (locationElement != null)
{
source = element;
element = "lat/lng";
var lat = locationElement.Element("lat");
var lng = locationElement.Element("lng");
if ((lat != null) && (lng != null))
{
Double latitude, longitude;
Double.TryParse(lat.Value, out latitude);
Double.TryParse(lng.Value, out longitude);
SaveCoordinates(currentRecord, latitude, longitude);
ok = true;
}
}
}
} else
{
result = geoResponse.Element("status");
if (result != null)
{
var msg = result.Value;
result = geoResponse.Element("error_message");
if (result != null)
{
msg = String.Format("{0}{1}{1}{2}", msg, Environment.NewLine, result.Value);
}
MessageBox.Show(msg, title, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}
}
if (!ok)
{
MessageBox.Show(String.Format("No [{0}] information found in [{1}] element.", element, source), title, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
}
}
每当我到达这一行时,都会收到一个
NULL
响应:var result = geoResponse.Element(element);
这是解释:
<GeocodeResponse>
<status>REQUEST_DENIED</status>
<error_message>The provided API key is invalid.</error_message>
</GeocodeResponse>
可以在Windows窗体应用程序中使用Google GeoCoding API吗?
最佳答案
当然,您可以从WinForms应用程序中使用地理编码API。对于API,发送请求的内容无关紧要。重要的是请求参数正确并且API密钥有效。
确实,我刚刚使用自己的API密钥测试了您的代码,并且工作正常,这使我认为您的API密钥有问题。
因此,请按照以下步骤尝试创建一个新的:
登录developer console
选择您的项目或创建一个新项目(1)
转到Library
(2)并搜索Geocoding API
(3)
进入内部后,单击Enable
(4)启用它
转到凭据并点击Create credentials
按钮(5)
从凭据类型中选择API key
(6)
关于c# - GeoCoding Maps API是否仅对网站有效?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/41265805/