ChangeType() [2/4]

static ? object System.Convert.ChangeType ( object? value, Type conversionType, IFormatProvider? provider )

inlinestatic

Definition at line 365 of file Convert.cs.

    {
        if ((object)conversionType == null)
        {
            throw new ArgumentNullException("conversionType");
        }
        if (value == null)
        {
            if (conversionType.IsValueType)
            {
                throw new InvalidCastException(SR.InvalidCast_CannotCastNullToValueType);
            }
            return null;
        }
        if (!(value is IConvertible convertible))
        {
            if (value.GetType() == conversionType)
            {
                return value;
            }
            throw new InvalidCastException(SR.InvalidCast_IConvertible);
        }
        if ((object)conversionType == ConvertTypes[3])
        {
            return convertible.ToBoolean(provider);
        }
        if ((object)conversionType == ConvertTypes[4])
        {
            return convertible.ToChar(provider);
        }
        if ((object)conversionType == ConvertTypes[5])
        {
            return convertible.ToSByte(provider);
        }
        if ((object)conversionType == ConvertTypes[6])
        {
            return convertible.ToByte(provider);
        }
        if ((object)conversionType == ConvertTypes[7])
        {
            return convertible.ToInt16(provider);
        }
        if ((object)conversionType == ConvertTypes[8])
        {
            return convertible.ToUInt16(provider);
        }
        if ((object)conversionType == ConvertTypes[9])
        {
            return convertible.ToInt32(provider);
        }
        if ((object)conversionType == ConvertTypes[10])
        {
            return convertible.ToUInt32(provider);
        }
        if ((object)conversionType == ConvertTypes[11])
        {
            return convertible.ToInt64(provider);
        }
        if ((object)conversionType == ConvertTypes[12])
        {
            return convertible.ToUInt64(provider);
        }
        if ((object)conversionType == ConvertTypes[13])
        {
            return convertible.ToSingle(provider);
        }
        if ((object)conversionType == ConvertTypes[14])
        {
            return convertible.ToDouble(provider);
        }
        if ((object)conversionType == ConvertTypes[15])
        {
            return convertible.ToDecimal(provider);
        }
        if ((object)conversionType == ConvertTypes[16])
        {
            return convertible.ToDateTime(provider);
        }
        if ((object)conversionType == ConvertTypes[18])
        {
            return convertible.ToString(provider);
        }
        if ((object)conversionType == ConvertTypes[1])
        {
            return value;
        }
        return convertible.ToType(conversionType, provider);
    }

References System.Convert.ConvertTypes, System.SR.InvalidCast_CannotCastNullToValueType, System.SR.InvalidCast_IConvertible, System.Type.IsValueType, and System.value.