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Added DEVPROPKEY.TryGetReadOnly method to look at read-only flag.

pull/229/head
dahall 2021-05-05 19:40:46 -06:00
parent d3d6119f3a
commit 56de5f0c91
1 changed files with 21 additions and 5 deletions
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26
PInvoke/SetupAPI/DevPropDef.cs
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@ -839,16 +839,32 @@ namespace Vanara.PInvoke
/// <summary>Performs a lookup of this <see cref="DEVPROPKEY"/> against defined values in this assembly to find a name.</summary>
/// <returns>The name, if found, otherwise <see langword="null"/>.</returns>
public string LookupName()
public string LookupName() => Lookup()?.Name;
/// <inheritdoc/>
public override string ToString() => LookupName() ?? $"{fmtid}:{pid}";
/// <summary>
/// Tries to determine if the property is read-only by performing a reverse lookup on known keys and, if found, reading its attributes.
/// </summary>
/// <param name="readOnly">if set to <see langword="true"/>, the property is known to be read-only.</param>
/// <returns>If <see langword="true"/>, the known key was found and the <paramref name="readOnly"/> output is valid.</returns>
public bool TryGetReadOnly(out bool readOnly)
{
readOnly = false;
var fi = Lookup();
if (fi is null) return false;
readOnly = !fi.GetCustomAttributes(typeof(CorrespondingTypeAttribute), false).Cast<CorrespondingTypeAttribute>().Any(a => a.Action.IsFlagSet(CorrespondingAction.Set));
return true;
}
private System.Reflection.FieldInfo Lookup()
{
var dpkType = GetType();
var lthis = this;
return dpkType.DeclaringType.GetFields(System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Static).
Where(fi => fi.FieldType == dpkType && lthis.Equals(fi.GetValue(null))).Select(fi => fi.Name).FirstOrDefault();
Where(fi => fi.FieldType == dpkType && lthis.Equals(fi.GetValue(null))).FirstOrDefault();
}
/// <inheritdoc/>
public override string ToString() => LookupName() ?? $"{fmtid}:{pid}";
}
}
}