The MgLayer instance actually keeps a copy of the ScaleRange values.
I assume that this is used to select what layers to render and speed up
the process.
Unfortunately there are no relevant properties exposed on the MgLayer class,
so you cannot change the values.
Instead, you can create a new MgLayer instance, and copy all the
properties from
the original MgLayer to the new MgLayer.
Then remove the original MgLayer and insert the new one in the same
position as
the previous one.
You should file a bug report stating that the scale ranges cannot be
refreshed from the API.
If you use the MaestroAPI, the values are exposed as a an array of
doubles, and thus modify-able.
Regards, Kenneth Skovhede, GEOGRAF A/S
SriRam007 skrev:
Hi Kenneth,
I m trying with the Sheboygan
+Sheboygan
+Layers
. Buildings
. CityLimits
. Roads
Here road layer is having Scale ranges like
Range From To
-------------------------
1 0 10000
2 10000 24000
Am showing all the ranges to let the user edit at runtime . And changing
scale below 24000 is working
but beyond 24000 it is not working.
And its XML file is like below. And I am changing the bold line
<?xml version="1.0" encoding="UTF-8"?>
<LayerDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xsi:noNamespaceSchemaLocation="LayerDefinition-1.3.0.xsd" version="1.3.0">
<VectorLayerDefinition>
<ResourceId>Library://Samples/Sheboygan/Data/RoadCenterLines.FeatureSource</ResourceId>
<FeatureName>SHP_Schema:RoadCenterLines</FeatureName>
<FeatureNameType>FeatureClass</FeatureNameType>
<Geometry>SHPGEOM</Geometry>
<VectorScaleRange>
<MaxScale>10000</MaxScale> <LineTypeStyle>
<LineRule>
<LegendLabel>
</LegendLabel>
<Label>
<Unit>Points</Unit>
<SizeContext>DeviceUnits</SizeContext>
<SizeX>0</SizeX>
<SizeY>8</SizeY>
<Text>"NAME"</Text>
<FontName>Verdana</FontName>
<ForegroundColor>FF000000</ForegroundColor>
<BackgroundColor>FFFFFFFF</BackgroundColor>
<BackgroundStyle>Transparent</BackgroundStyle>
<HorizontalAlignment>'Center'</HorizontalAlignment>
<VerticalAlignment>'Baseline'</VerticalAlignment>
<AdvancedPlacement>
<ScaleLimit>0.5</ScaleLimit>
</AdvancedPlacement>
</Label>
<LineSymbolization2D>
<LineStyle>Solid</LineStyle>
<Thickness>0.5</Thickness>
<Color>FFFF00FF</Color>
<Unit>Millimeters</Unit>
<SizeContext>DeviceUnits</SizeContext>
</LineSymbolization2D>
</LineRule>
</LineTypeStyle>
</VectorScaleRange>
<VectorScaleRange>
<MinScale>"10000"</MinScale>
<MaxScale>24000</MaxScale>
<LineTypeStyle>
<LineRule>
<LegendLabel>
</LegendLabel>
<LineSymbolization2D>
<LineStyle>Solid</LineStyle>
<Thickness>0.5</Thickness>
<Color>FF808080</Color>
<Unit>Millimeters</Unit>
<SizeContext>DeviceUnits</SizeContext>
</LineSymbolization2D>
</LineRule>
</LineTypeStyle>
</VectorScaleRange>
</VectorLayerDefinition>
</LayerDefinition>
After modification my XML file :::
Range From To style(BK color)
------------------------------------------
1 0 11000 Pink
2 11000 25000 Green
<?xml version="1.0" encoding="UTF-8"?>
<LayerDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xmlns:xsd="http://www.w3.org/2001/XMLSchema";
xsi:noNamespaceSchemaLocation="LayerDefinition-1.3.0.xsd" version="1.3.0">
<VectorLayerDefinition>
<ResourceId>Library://Samples/Sheboygan/Data/RoadCenterLines.FeatureSource</ResourceId>
<FeatureName>SHP_Schema:RoadCenterLines</FeatureName>
<FeatureNameType>FeatureClass</FeatureNameType>
<Geometry>SHPGEOM</Geometry>
<VectorScaleRange>
<MiniScale>0</MiniScale>
<MaxScale>11000</MaxScale> <LineTypeStyle>
<LineRule>
<LegendLabel>
</LegendLabel>
<Label>
<Unit>Points</Unit>
<SizeContext>DeviceUnits</SizeContext>
<SizeX>0</SizeX>
<SizeY>8</SizeY>
<Text>"NAME"</Text>
<FontName>Verdana</FontName>
<ForegroundColor>FF000000</ForegroundColor>
<BackgroundColor>FFFFFFFF</BackgroundColor>
<BackgroundStyle>Transparent</BackgroundStyle>
<HorizontalAlignment>'Center'</HorizontalAlignment>
<VerticalAlignment>'Baseline'</VerticalAlignment>
<AdvancedPlacement>
<ScaleLimit>0.5</ScaleLimit>
</AdvancedPlacement>
</Label>
<LineSymbolization2D>
<LineStyle>Solid</LineStyle>
<Thickness>0.5</Thickness>
<Color>FFFF00FF</Color>
<Unit>Millimeters</Unit>
<SizeContext>DeviceUnits</SizeContext>
</LineSymbolization2D>
</LineRule>
</LineTypeStyle>
</VectorScaleRange>
<VectorScaleRange>
<MinScale>"11000"</MinScale>
<MaxScale>25000</MaxScale>
<LineTypeStyle>
<LineRule>
<LegendLabel>
</LegendLabel>
<LineSymbolization2D>
<LineStyle>Solid</LineStyle>
<Thickness>0.5</Thickness>
<Color>FF808080</Color>
<Unit>Millimeters</Unit>
<SizeContext>DeviceUnits</SizeContext>
</LineSymbolization2D>
</LineRule>
</LineTypeStyle>
</VectorScaleRange>
</VectorLayerDefinition>
</LayerDefinition>
And i m saving like
resourceService.SetResource(layerResId, new MgByteReader(layerDefinition,
"text/xml"), null);
layer.SetLayerDefinition(layerResId, resourceService);
map.Save(resourceService);
then refreshing the map by mapFrame.Refresh();
But the second range is visible upto 24000.
If i will give below 24000 instead of beyond 24000 then everything is
working
Layer is showing with its style
(0 - 11000 :Pink color
And 11000 - 24000 (Or below) : Green Color is showing)
for the respective ranges.
thanks
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