1 Answer, 1 is accepted
0
Accepted
Hello,
Thank you for the shared pictures.
In order to change the format, you can implement a custom WmsTiledProvider and a custom tile source.
public class CustomWmsTiledProvider : TiledProvider, ICloneable
{
/// <summary>
/// Identifies the BaseUri dependency property.
/// </summary>
public static readonly DependencyProperty BaseUriProperty = DependencyProperty.Register(
"BaseUri",
typeof(string),
typeof(WmsTiledProvider),
new PropertyMetadata(null, ParametersChanged));
/// <summary>
/// Identifies the Layers dependency property.
/// </summary>
public static readonly DependencyProperty LayersProperty = DependencyProperty.Register(
"Layers",
typeof(string),
typeof(WmsTiledProvider),
new PropertyMetadata("Countries,Borders,Coastlines", ParametersChanged));
/// <summary>
/// Identifies the Projection dependency property.
/// </summary>
public static readonly DependencyProperty ProjectionProperty = DependencyProperty.Register(
"Projection",
typeof(string),
typeof(WmsTiledProvider),
new PropertyMetadata("EPSG:4326", ParametersChanged));
/// <summary>
/// Identifies the Version dependency property.
/// </summary>
public static readonly DependencyProperty VersionProperty = DependencyProperty.Register(
"Version",
typeof(string),
typeof(WmsTiledProvider),
new PropertyMetadata("1.3.0", ParametersChanged, VersionCoerced));
private static readonly string[] SupportedVersions = new string[]
{
"1.3.0",
"1.1.1",
"1.1.0",
"1.0.7",
"1.0.0"
};
private MercatorProjection projection = new MercatorProjection();
/// <summary>
/// Initializes a new instance of the WmsTiledProvider class.
/// </summary>
public CustomWmsTiledProvider()
: base()
{
}
/// <summary>
/// Initializes a new instance of the WmsTiledProvider class.
/// </summary>
/// <param name="baseUri">Base URI of the WMS server.</param>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1054:UriParametersShouldNotBeStrings", MessageId = "0#")]
public CustomWmsTiledProvider(string baseUri)
{
this.BaseUri = baseUri;
}
public void Setup()
{
this.Layers = "osm";
this.Version = "1.1.0";
this.Projection = "EPSG:4326";
var tileSource = new CustomWmsTileSource(this.BaseUri, 256, 256);
this.InitializeTileSource(tileSource);
this.MapSources.Add(tileSource.UniqueId, tileSource);
}
/// <summary>
/// Gets or sets Base URI of the WMS server.
/// </summary>
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1056:UriPropertiesShouldNotBeStrings")]
public string BaseUri
{
get
{
return (string)this.GetValue(BaseUriProperty);
}
set
{
this.SetValue(BaseUriProperty, value);
}
}
/// <summary>
/// Gets or sets layers are requested from the WMS server.
/// </summary>
public string Layers
{
get
{
return (string)this.GetValue(LayersProperty);
}
set
{
this.SetValue(LayersProperty, value);
}
}
/// <summary>
/// Gets or sets coordinate Reference System (CRS) or Spatial Reference System (SRS) identifier.
/// Reserved for future use.
/// </summary>
public string Projection
{
get
{
return (string)this.GetValue(ProjectionProperty);
}
set
{
this.SetValue(ProjectionProperty, value);
}
}
/// <summary>
/// Gets or sets the version of the requested service.
/// </summary>
public string Version
{
get
{
return (string)this.GetValue(VersionProperty);
}
set
{
this.SetValue(VersionProperty, value);
}
}
/// <summary>
/// Returns the SpatialReference for the map provider.
/// </summary>
public override ISpatialReference SpatialReference
{
get
{
return this.projection;
}
}
/// <summary>
/// Implements the ICloneable interface.
/// </summary>
/// <returns>Cloned object.</returns>
public new object Clone()
{
CustomWmsTiledProvider clone = new CustomWmsTiledProvider(this.BaseUri);
clone.Layers = this.Layers;
this.InheritParameters(clone);
return clone;
}
private static void ParametersChanged(DependencyObject source, DependencyPropertyChangedEventArgs eventArgs)
{
CustomWmsTiledProvider provider = source as CustomWmsTiledProvider;
if (provider != null)
{
provider.OnParametersChanged();
}
}
private static object VersionCoerced(DependencyObject source, object value)
{
string version = value as string;
if (version != null)
{
if (!CustomWmsTiledProvider.SupportedVersions.Contains(version))
{
version = "1.3.0";
}
}
else
{
version = "1.3.0";
}
return version;
}
public void InitializeTileSource(CustomWmsTileSource source)
{
source.BaseUri = this.BaseUri;
source.Layers = this.Layers;
source.Projection = this.Projection;
source.Version = this.Version;
}
private void OnParametersChanged()
{
if (this.ValidateParameters())
{
if (this.MapSources.Count > 0)
{
CustomWmsTileSource source = this.MapSources[this.MapSources.Keys.FirstOrDefault()] as CustomWmsTileSource;
if (source != null)
{
this.InitializeTileSource(source);
}
}
else
{
CustomWmsTileSource source = new CustomWmsTileSource(this.BaseUri, 256, 256);
this.InitializeTileSource(source);
this.MapSources.Add(source.UniqueId, source);
}
}
}
private bool ValidateParameters()
{
return !string.IsNullOrEmpty(this.BaseUri)
&& !string.IsNullOrEmpty(this.Layers);
}
}
public class CustomWmsTileSource : WmsTileSource
{
public CustomWmsTileSource(string baseUri, int tileWidth, int tileHeight) : base(baseUri, tileWidth, tileHeight)
{
}
protected override Uri GetTile(int tileLevel, int tilePositionX, int tilePositionY)
{
var uri = base.GetTile(tileLevel, tilePositionX, tilePositionY);
return new Uri(uri.ToString().Replace("PNG", "image/png"), UriKind.Absolute);
}
}This approach uses the default code for the WmsTiledProvider and replaces its tile source with a custom one. The imporant code is within the GetTile method of the CustomWmsTileSource class, which allows for replacing the "PNG" in the created Uri.
On a side note, we also have a feature request: Map: Expose an option to set the "FORMAT" parameter of the url used in the WmsTileSource to allow for an easier way to achieve this behavior.
I hope you find this information helpful.
Regards,
Vladimir Stoyanov
Progress Telerik