ClemensFischer/XAML-Map-Control
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Reworked WmsImageLayer

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This commit is contained in:
ClemensF 2018-06-11 21:37:36 +02:00
parent 8048eb123f
commit de6a586bae
4 changed files with 52 additions and 95 deletions
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111
MapControl/Shared/WmsImageLayer.cs
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@ -21,16 +21,10 @@ namespace MapControl
{
public partial class WmsImageLayer : MapImageLayer
{
private const string DefaultVersion = "1.3.0";
public static readonly DependencyProperty ServiceUriProperty = DependencyProperty.Register(
nameof(ServiceUri), typeof(Uri), typeof(WmsImageLayer),
new PropertyMetadata(null, async (o, e) => await ((WmsImageLayer)o).UpdateImageAsync()));
public static readonly DependencyProperty VersionProperty = DependencyProperty.Register(
nameof(Version), typeof(string), typeof(WmsImageLayer),
new PropertyMetadata(DefaultVersion, async (o, e) => await ((WmsImageLayer)o).UpdateImageAsync()));
public static readonly DependencyProperty LayersProperty = DependencyProperty.Register(
nameof(Layers), typeof(string), typeof(WmsImageLayer),
new PropertyMetadata(string.Empty, async (o, e) => await ((WmsImageLayer)o).UpdateImageAsync()));
@ -43,20 +37,12 @@ namespace MapControl
nameof(Format), typeof(string), typeof(WmsImageLayer),
new PropertyMetadata("image/png", async (o, e) => await ((WmsImageLayer)o).UpdateImageAsync()));
private string layers = string.Empty;
public Uri ServiceUri
{
get { return (Uri)GetValue(ServiceUriProperty); }
set { SetValue(ServiceUriProperty, value); }
}
public string Version
{
get { return (string)GetValue(VersionProperty); }
set { SetValue(VersionProperty, value); }
}
public string Layers
{
get { return (string)GetValue(LayersProperty); }
@ -75,57 +61,13 @@ namespace MapControl
set { SetValue(FormatProperty, value); }
}
protected override async Task<ImageSource> GetImageAsync(BoundingBox boundingBox)
{
ImageSource imageSource = null;
if (ServiceUri != null)
{
var version = Version;
var uri = GetRequestUri(ref version) + "REQUEST=GetMap&";
var projectionParameters = ParentMap.MapProjection.WmsQueryParameters(boundingBox, version.StartsWith("1.1."));
if (!string.IsNullOrEmpty(projectionParameters))
{
if (uri.IndexOf("LAYERS=", StringComparison.OrdinalIgnoreCase) < 0)
{
uri += "LAYERS=" + (Layers ?? "") + "&";
}
if (uri.IndexOf("STYLES=", StringComparison.OrdinalIgnoreCase) < 0)
{
uri += "STYLES=" + (Styles ?? "") + "&";
}
if (uri.IndexOf("FORMAT=", StringComparison.OrdinalIgnoreCase) < 0)
{
uri += "FORMAT=" + (Format ?? "") + "&";
}
uri += projectionParameters;
try
{
imageSource = await ImageLoader.LoadImageAsync(new Uri(uri.Replace(" ", "%20")), false);
}
catch (Exception ex)
{
Debug.WriteLine("WmsImageLayer: {0}: {1}", uri, ex.Message);
}
}
}
return imageSource;
}
public async Task<IList<string>> GetLayerNamesAsync()
{
IList<string> layerNames = null;
if (ServiceUri != null)
{
var version = Version;
var uri = GetRequestUri(ref version) + "REQUEST=GetCapabilities";
var uri = GetRequestUri("GetCapabilities");
try
{
@ -158,13 +100,45 @@ namespace MapControl
return layerNames;
}
private string GetRequestUri(ref string version)
protected override async Task<ImageSource> GetImageAsync(BoundingBox boundingBox)
{
if (version == null)
ImageSource imageSource = null;
var projectionParameters = ParentMap.MapProjection.WmsQueryParameters(boundingBox);
if (ServiceUri != null && !string.IsNullOrEmpty(projectionParameters))
{
version = DefaultVersion;
var uri = GetRequestUri("GetMap&" + projectionParameters);
if (uri.IndexOf("LAYERS=", StringComparison.OrdinalIgnoreCase) < 0 && Layers != null)
{
uri += "&LAYERS=" + Layers;
}
if (uri.IndexOf("STYLES=", StringComparison.OrdinalIgnoreCase) < 0 && Styles != null)
{
uri += "&STYLES=" + Styles;
}
if (uri.IndexOf("FORMAT=", StringComparison.OrdinalIgnoreCase) < 0 && Format != null)
{
uri += "&FORMAT=" + Format;
}
try
{
imageSource = await ImageLoader.LoadImageAsync(new Uri(uri.Replace(" ", "%20")), false);
}
catch (Exception ex)
{
Debug.WriteLine("WmsImageLayer: {0}: {1}", uri, ex.Message);
}
}
return imageSource;
}
private string GetRequestUri(string request)
{
var uri = ServiceUri.ToString();
if (!uri.EndsWith("?") && !uri.EndsWith("&"))
@ -177,19 +151,12 @@ namespace MapControl
uri += "SERVICE=WMS&";
}
int versionStart = uri.IndexOf("VERSION=", StringComparison.OrdinalIgnoreCase);
int versionEnd;
if (versionStart < 0)
if (uri.IndexOf("VERSION=", StringComparison.OrdinalIgnoreCase) < 0)
{
uri += "VERSION=" + version + "&";
}
else if ((versionEnd = uri.IndexOf("&", versionStart + 8)) >= versionStart + 8)
{
version = uri.Substring(versionStart, versionEnd - versionStart);
uri += "VERSION=1.3.0&";
}
return uri;
return uri + "REQUEST=" + request;
}
private static IEnumerable<XmlElement> ChildElements(XmlElement element, string name)