public static ExifItem Convert(this PropertyItem item)
{
if (!Items.TryGetValue(item.Id, out ExifItem result))
{
result = new ExifItem();
result.Id = item.Id;
}
DataType type = (DataType)item.Type;
result.DataType = type;
object value = item.Value.GetSpecifiedFormatObject(type, item.Len);
if (value is string str)
{
if (str.EndsWith("\0"))
{
result.Value = str.Substring(0, str.Length - 1);
}
else
{
result.Value = value;
}
}
else
{
result.Value = value;
}
result.Length = item.Len;
return(result);
}
public static string ConvertValue(ExifItem item)
{
if (Converters.ContainsKey(item.Id))
{
return(Converters[item.Id](item.Value));
}
throw new Exception("不存在ID为" + item.Id + "的转换器");
}
public static string TryConvertValue(ExifItem item)
{
if (!Converters.ContainsKey(item.Id))
{
return(null);
}
try
{
return(ConvertValue(item));
}
catch (Exception ex)
{
return(null);
}
}