How to convert a TypeCode to an actual type?

Question

In the code below I get colType which is a code number for the type. But how would I convert that number into the actual type? Thx!!

for (int j = 0;         


        

Answer 1

Here's how I like to do it. I prefer using a static table vs. a big switch or reflection for this.

/// 

/// Table that maps TypeCode to it's corresponding Type.
/// 
static IReadOnlyDictionary TypeCodeToTypeMap = new Dictionary
{
    { TypeCode.Boolean, typeof(bool) },
    { TypeCode.Byte, typeof(byte) },
    { TypeCode.Char, typeof(char) },
    { TypeCode.DateTime, typeof(DateTime) },
    { TypeCode.DBNull, typeof(DBNull) },
    { TypeCode.Decimal, typeof(decimal) },
    { TypeCode.Double, typeof(double) },
    { TypeCode.Empty, null },
    { TypeCode.Int16, typeof(short) },
    { TypeCode.Int32, typeof(int) },
    { TypeCode.Int64, typeof(long) },
    { TypeCode.Object, typeof(object) },
    { TypeCode.SByte, typeof(sbyte) },
    { TypeCode.Single, typeof(Single) },
    { TypeCode.String, typeof(string) },
    { TypeCode.UInt16, typeof(UInt16) },
    { TypeCode.UInt32, typeof(UInt32) },
    { TypeCode.UInt64, typeof(UInt64) }
};

/// 

/// Convert a TypeCode ordinal into it's corresponding Type instance.
/// 
public static Type ToType(this TypeCode code)
{
    Type type = null;

    TypeCodeToTypeMap.TryGetValue(code, out type);

    return type;
}