Question

I am trying to write a generic extension to turn a ManagementObjectCollection into a DataTable. This is just to make things easier for a startup script/program I am writing. I have ran into a problem with CimType. I have included the code I have written so far below.

    public static DataTable GetData(this ManagementObjectCollection objectCollection)
    {
        DataTable table = new DataTable();

        foreach (ManagementObject obj in objectCollection)
        {
            if (table.Columns.Count == 0)
            {
                foreach (PropertyData property in obj.Properties)
                {
                    table.Columns.Add(property.Name, property.Type);
                }
            }

            DataRow row = table.NewRow();

            foreach (PropertyData property in obj.Properties)
            {
                row[property.Name] = property.Value;
            }

            table.Rows.Add(row);
        }

        return table;
    }
}

I have found the a method which I think will work at http://www.devcow.com/blogs/adnrg/archive/2005/09/23/108.aspx. However it seems to me like there may be a better way, or even a .net function I am overlooking.

I guess I didn’t make it clear. The problem I am having is that I need to convert from System.Management.CimType to System.Type. I almost thought this would be a common problem, but I suppose I’m trying to solve it in a general way.

Answer 1

Hi You can also try the following code:

public static class CimConvert
{

private readonly static IDictionary<CimType, Type> Cim2TypeTable =
    new Dictionary<CimType, Type>
        {
            {CimType.Boolean, typeof (bool)},
            {CimType.Char16, typeof (string)},
            {CimType.DateTime, typeof (DateTime)},
            {CimType.Object, typeof (object)},
            {CimType.Real32, typeof (decimal)},
            {CimType.Real64, typeof (decimal)},
            {CimType.Reference, typeof (object)},
            {CimType.SInt16, typeof (short)},
            {CimType.SInt32, typeof (int)},
            {CimType.SInt8, typeof (sbyte)},
            {CimType.String, typeof (string)},
            {CimType.UInt8, typeof (byte)},
            {CimType.UInt16, typeof (ushort)},
            {CimType.UInt32, typeof (uint)},
            {CimType.UInt64, typeof (ulong)}
        };

public static Type Cim2SystemType(this PropertyData data)
{
    Type type = Cim2TypeTable[data.Type];
    if (data.IsArray)
        type = type.MakeArrayType();
    return type;
}

public static object Cim2SystemValue(this PropertyData data)
{
    Type type = Cim2SystemType(data);
    if (data.Type == CimType.DateTime)
        return DateTime.ParseExact(data.Value.ToString(), "yyyyMMddHHmmss.ffffff-000", CultureInfo.InvariantCulture);
    return Convert.ChangeType(data.Value, type);
}
}