/// <summary>
/// Modifies the source data before passing it to the target for display in the UI.
/// </summary>
/// <param name="value">The source data being passed to the target.</param>
/// <param name="targetType">The <see cref="T:System.Type"/> of data expected by the target dependency property.</param>
/// <param name="parameter">An optional parameter to be used in the converter logic.</param>
/// <param name="culture">The culture of the conversion.</param>
/// <returns>
/// The value to be passed to the target dependency property.
/// </returns>
public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
{
if (parameter == null || string.IsNullOrEmpty(Field) || value == null)
{
return("");
}
#if SILVERLIGHT
PropertyInfo fieldProperty = value.GetType().GetProperty(Field);
if (fieldProperty == null)
{
return("");
}
var code = fieldProperty.GetValue(value, null);
#else
var code = value;
#endif
if (code == null)
{
return("");
}
CodedValueSources codedValueSources = parameter as CodedValueSources;
if (codedValueSources != null)
{
CodedValueSource codedValueSource = codedValueSources.FirstOrDefault(x => x.Code != null && x.Code.ToString() == code.ToString());
if (codedValueSource != null)
{
return(codedValueSource.DisplayName);
}
}
return("");
}
/// <summary>
/// Returns a CodedValueSources object constructed form the CodedValueDomain value.
/// </summary>
/// <param name="field">The field to make a CodedValueSource from.</param>
/// <returns>The CodedValueSources object used for a code to value lookup.</returns>
internal static CodedValueSources BuildCodedValueSource(Field field)
{
CodedValueDomain codedValueDomain = field.Domain as CodedValueDomain;
CodedValueSources codedValueSources = null;
if (codedValueDomain != null)
{
foreach (KeyValuePair <object, string> codedValue in codedValueDomain.CodedValues)
{
if (codedValueSources == null)
{
codedValueSources = new CodedValueSources();
if (field.Nullable)
{
CodedValueSource nullableSource = new CodedValueSource()
{
Code = null, DisplayName = " "
};
codedValueSources.Add(nullableSource);
}
}
codedValueSources.Add(new CodedValueSource()
{
Code = codedValue.Key, DisplayName = codedValue.Value
});
}
}
return(codedValueSources);
}
/// <summary>
/// Returns CodedValueSources that make up the display text of each value of the TypeIDField.
/// </summary>
/// <param name="field">TypeIDField</param>
/// <param name="layerInfo">FeatureLayerInof used to construct the CodedValueSources from the FeatureTypes.</param>
/// <returns>CodedValueSoruces that contain code an value matches to all possible TypeIDField values.</returns>
internal static CodedValueSources BuildTypeIDCodedValueSource(Field field, FeatureLayerInfo layerInfo)
{
CodedValueSources codedValueSources = null;
foreach (KeyValuePair <object, FeatureType> kvp in layerInfo.FeatureTypes)
{
if (kvp.Key == null)
{
continue;
}
string name = (kvp.Value != null && kvp.Value.Name != null) ? kvp.Value.Name : "";
CodedValueSource codedValueSource = new CodedValueSource()
{
Code = kvp.Key, DisplayName = name
};
if (codedValueSources == null)
{
codedValueSources = new CodedValueSources();
if (field.Nullable)
{
CodedValueSource nullableSource = new CodedValueSource()
{
Code = null, DisplayName = " "
};
codedValueSources.Add(nullableSource);
}
}
codedValueSources.Add(codedValueSource);
}
return(codedValueSources);
}
/// <summary>
/// Builds a DynamicCodedValueSource object used to lookup display value.
/// </summary>
/// <param name="field">The field to build DynamicCodedValueSource for</param>
/// <param name="layerInfo">The FeatureLayerInfo used to lookup all the coded value domains </param>
/// <returns>DynamicCodedValueSource which is a collection of coded value domain values for a field.</returns>
internal static DynamicCodedValueSource BuildDynamicCodedValueSource(Field field, FeatureLayerInfo layerInfo)
{
DynamicCodedValueSource dynamicCodedValueSource = null;
foreach (object key in layerInfo.FeatureTypes.Keys)
{
FeatureType featureType = layerInfo.FeatureTypes[key];
if (featureType.Domains.ContainsKey(field.Name))
{
if (dynamicCodedValueSource == null)
{
dynamicCodedValueSource = new DynamicCodedValueSource();
}
CodedValueDomain codedValueDomain = featureType.Domains[field.Name] as CodedValueDomain;
if (codedValueDomain != null)
{
CodedValueSources codedValueSources = null;
foreach (KeyValuePair <object, string> kvp in codedValueDomain.CodedValues)
{
if (codedValueSources == null)
{
codedValueSources = new CodedValueSources();
if (field.Nullable)
{
CodedValueSource nullableSource = new CodedValueSource()
{
Code = null, DisplayName = " "
};
codedValueSources.Add(nullableSource);
}
}
codedValueSources.Add(new CodedValueSource()
{
Code = kvp.Key, DisplayName = kvp.Value
});
}
if (codedValueSources != null)
{
if (dynamicCodedValueSource == null)
{
dynamicCodedValueSource = new DynamicCodedValueSource();
}
dynamicCodedValueSource.Add(featureType.Id, codedValueSources);
}
}
}
}
return(dynamicCodedValueSource);
}
internal static CodedValueSources GetCodedValueSources(string lookupField, Field field, object generic, DynamicCodedValueSource dynamicCodedValueSource, CodedValueSources nullableSources)
{
if (dynamicCodedValueSource != null && generic != null && !string.IsNullOrEmpty(lookupField))
{
#if SILVERLIGHT
PropertyInfo lookupFieldProperty = generic.GetType().GetProperty(lookupField);
if (lookupFieldProperty == null)
{
return(null);
}
var key = lookupFieldProperty.GetValue(generic, null);
#else
var key = (generic is Graphic) ? (generic as Graphic).Attributes[lookupField] : null;
#endif
if (key == null)
{
object code = CodedValueSources.CodedValueCodeLookup(field.Name, generic, new CodedValueSources());
nullableSources.Clear();
if (field.Nullable)
{
CodedValueSource nullableSource = new CodedValueSource()
{
Code = null, DisplayName = " "
};
nullableSources.Add(nullableSource);
}
if (code != null)
{
CodedValueSource currentSource = new CodedValueSource()
{
Code = code, DisplayName = code.ToString()
};
nullableSources.Add(currentSource);
}
return(nullableSources);
}
CodedValueSources codedValueSoruces = null;
if (dynamicCodedValueSource.ContainsKey(key))
{
codedValueSoruces = dynamicCodedValueSource[key];
}
else if (dynamicCodedValueSource.ContainsKey(key.ToString()))
{
codedValueSoruces = dynamicCodedValueSource[key.ToString()];
}
CodedValueSource tempSource = codedValueSoruces.FirstOrDefault(x => x.Temp == true);
if (tempSource != null)
{
codedValueSoruces.Remove(tempSource);
}
#if SILVERLIGHT
object value = CodedValueSources.CodedValueNameLookup(field.Name, generic, new CodedValueSources());
if (string.IsNullOrEmpty(value as string))
{
value = null;
}
#else
object value = (generic as Graphic).Attributes[field.Name];
#endif
if (value != null)
{
CodedValueSource source = codedValueSoruces.FirstOrDefault(x => x.Code != null && x.Code.ToString() == value.ToString());
if (source == null)
{
CodedValueSource currentSource = new CodedValueSource()
{
Code = value, DisplayName = value.ToString(), Temp = true
};
if (field.Nullable)
{
codedValueSoruces.Insert(1, currentSource);
}
else
{
codedValueSoruces.Insert(0, currentSource);
}
}
}
return(codedValueSoruces);
}
return(null);
}