예제 #1
0
        private void GetImageReference()
        {
            IPropertyStore store = ShellPropertyCollection.CreateDefaultPropertyStore(ParentShellObject);

            using (PropVariant propVar = new PropVariant()) {
                store.GetValue(ref propertyKey, propVar);

                Marshal.ReleaseComObject(store);
                store = null;

                string refPath;
                ((IPropertyDescription2)Description.NativePropertyDescription).GetImageReferenceForValue(
                    propVar, out refPath);

                if (refPath == null)
                {
                    return;
                }

                int index = ShellNativeMethods.PathParseIconLocation(ref refPath);
                if (refPath != null)
                {
                    imageReferencePath      = refPath;
                    imageReferenceIconIndex = index;
                }
            }
        }
예제 #2
0
        /// <summary>
        /// Returns a formatted, Unicode string representation of a property value.
        /// </summary>
        /// <param name="format">One or more of the PropertyDescriptionFormat flags
        /// that indicate the desired format.</param>
        /// <returns>The formatted value as a string, or null if this property
        /// cannot be formatted for display.</returns>
        public string FormatForDisplay(PropertyDescriptionFormatOptions format)
        {
            string formattedString;

            if (Description == null || Description.NativePropertyDescription == null)
            {
                // We cannot do anything without a property description
                return(null);
            }

            IPropertyStore store = ShellPropertyCollection.CreateDefaultPropertyStore(ParentShellObject);

            using (PropVariant propVar = new PropVariant()) {
                store.GetValue(ref propertyKey, propVar);

                // Release the Propertystore
                Marshal.ReleaseComObject(store);
                store = null;

                HResult hr = Description.NativePropertyDescription.FormatForDisplay(propVar, ref format, out formattedString);

                // Sometimes, the value cannot be displayed properly, such as for blobs
                // or if we get argument exception
                if (!CoreErrorHelper.Succeeded(hr))
                {
                    throw new ShellException(hr);
                }

                return(formattedString);
            }
        }