ClemensFischer/XAML-Map-Control
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Update WmsImageLayer.cs

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This commit is contained in:
ClemensF 2020-04-26 12:20:20 +02:00
parent 44901a45ed
commit 4542c37a3d
1 changed files with 36 additions and 43 deletions
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79
MapControl/Shared/WmsImageLayer.cs
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@ -82,16 +82,28 @@ namespace MapControl
public async Task<IEnumerable<string>> GetLayerNamesAsync()
{
IEnumerable<string> layerNames = null;
var capabilities = await GetCapabilities();
if (capabilities != null)
if (ServiceUri != null)
{
var ns = capabilities.Name.Namespace;
var uri = GetRequestUri("GetCapabilities").Replace(" ", "%20");
layerNames = capabilities
.Descendants(ns + "Layer")
.Select(e => e.Element(ns + "Name")?.Value)
.Where(n => !string.IsNullOrEmpty(n));
try
{
using (var stream = await ImageLoader.HttpClient.GetStreamAsync(uri))
{
var capabilities = XDocument.Load(stream).Root;
var ns = capabilities.Name.Namespace;
layerNames = capabilities
.Descendants(ns + "Layer")
.Select(e => e.Element(ns + "Name")?.Value)
.Where(n => !string.IsNullOrEmpty(n));
}
}
catch (Exception ex)
{
Debug.WriteLine("WmsImageLayer: {0}: {1}", uri, ex.Message);
}
}
return layerNames;
@ -102,18 +114,25 @@ namespace MapControl
/// </summary>
protected override async Task<ImageSource> GetImageAsync()
{
if (Layers == null && // get first Layer
ServiceUri != null &&
ServiceUri.ToString().IndexOf("LAYERS=", StringComparison.OrdinalIgnoreCase) < 0)
ImageSource image = null;
if (ServiceUri != null)
{
Layers = (await GetLayerNamesAsync())?.FirstOrDefault() ?? "";
if (Layers == null &&
ServiceUri.ToString().IndexOf("LAYERS=", StringComparison.OrdinalIgnoreCase) < 0)
{
Layers = (await GetLayerNamesAsync())?.FirstOrDefault() ?? ""; // get first Layer from Capabilities
}
var uri = GetImageUri();
if (uri != null)
{
image = await ImageLoader.LoadImageAsync(new Uri(uri.Replace(" ", "%20")));
}
}
var uri = GetImageUri();
return uri != null
? await ImageLoader.LoadImageAsync(new Uri(uri.Replace(" ", "%20")))
: null;
return image;
}
/// <summary>
@ -124,7 +143,7 @@ namespace MapControl
string uri = null;
var projection = ParentMap?.MapProjection;
if (ServiceUri != null && projection != null && !string.IsNullOrEmpty(projection.CrsId))
if (projection != null && !string.IsNullOrEmpty(projection.CrsId))
{
uri = GetRequestUri("GetMap");
@ -175,31 +194,5 @@ namespace MapControl
return uri + "REQUEST=" + request;
}
private async Task<XElement> GetCapabilities()
{
XElement capabilities = null;
if (ServiceUri != null)
{
var uri = GetRequestUri("GetCapabilities").Replace(" ", "%20");
try
{
using (var stream = await ImageLoader.HttpClient.GetStreamAsync(uri))
{
capabilities = XDocument.Load(stream).Root;
}
var ns = capabilities.Name.Namespace;
}
catch (Exception ex)
{
Debug.WriteLine("WmsImageLayer: {0}: {1}", uri, ex.Message);
}
}
return capabilities;
}
}
}