public static string GetDisplayNameOnly(this MetadataDictionary metadata)
{
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
if (metadata.ContainsKey("DisplayName", true))
{
object o = metadata["DisplayName", true];
if (o != null)
{
return(o.ToString());
}
}
else if (metadata.ContainsKey("long_name", true))
{
object o = metadata["long_name", true];
if (o != null)
{
return(o.ToString());
}
}
else if (metadata.ContainsKey("longname", true))
{
object o = metadata["longname", true];
if (o != null)
{
return(o.ToString());
}
}
return(null);
}
private static string GetName(MetadataDictionary vm)
{
if (vm == null)
{
throw new ArgumentNullException("metadata");
}
if (vm.ContainsKey(vm.KeyForName))
{
return((string)vm[vm.KeyForName, SchemaVersion.Committed]);
}
else if (vm.ContainsKey(vm.KeyForName, SchemaVersion.Proposed))
{
return((string)vm[vm.KeyForName, SchemaVersion.Proposed]);
}
return("");
}
/// <summary>
/// Gets the value of "units" attribute, if exists; otherwise, returns null.
/// </summary>
/// <param name="metadata"></param>
/// <returns></returns>
public static string GetUnits(this MetadataDictionary metadata)
{
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
if (metadata.ContainsKey("units", true))
{
return(metadata["units", true].ToString());
}
return(null);
}
/// <summary>
/// Gets the value of the attribute with name "max" if it is presented;
/// otherwise returns null.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="metadata"></param>
/// <param name="default"></param>
/// <returns></returns>
public static object GetMax(this MetadataDictionary metadata)
{
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
if (metadata.ContainsKey("max"))
{
return(metadata["max"]);
}
return(null);
}
/// <summary>
/// Gets the value of the attribute with name "min" if it is presented;
/// otherwise returns <paramref name="default"/>.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="metadata"></param>
/// <param name="default"></param>
/// <returns></returns>
public static T GetMax <T>(this MetadataDictionary metadata, T @default)
{
if (metadata == null)
{
throw new ArgumentNullException("metadata");
}
if (metadata.ContainsKey("max"))
{
return((T)metadata["max"]);
}
return(@default);
}
/// <summary>
/// Returns the display name from the metadata, if exists.
/// Otherwise, returns the name of the variable.
/// If there is no name, returns empty string.
/// </summary>
/// <param name="metadata"></param>
/// <returns></returns>
public static string GetDisplayName(this MetadataDictionary metadata)
{
string dname = GetDisplayNameOnly(metadata);
if (!String.IsNullOrEmpty(dname))
{
return(dname);
}
if (metadata.ContainsKey(metadata.KeyForName))
{
return((string)metadata[metadata.KeyForName]);
}
return(String.Empty);
}