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Numeric Converter – Going mobile!

By BalaMurali Balaji
Posted On Oct 24,2009
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Category: C#
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Numeric Converter – Going mobile!




Four years ago, I wrote two methods in C#, one for the conversion of Decimal to any base and another for converting any Base to Decimal number.


It was also posted as an article in the CodeProject titled “Conversion of Decimal to any base and vice-versa” and now, I have added an additional functionality of converting a number from any base to the other. For example, using this method one could convert a binary number to octal number. Accordingly, the UI is also changed.


This newer version of the Numeric Converter is available as mobile device application and is currently configured to run on Windows Mobile 5.0 Pocket PC R2 device and the emulator.




The Numeric Converter allows you to convert a number of any bases to another base. The method DecimalToBase, it converts a number from Decimal to the specified base entered by the user. Another method BaseToDecimal converts the number from the specified base to the corresponding decimal equivalent.


The following method is not actually modified from the previous version and is left as it is to convert a number to any base user has entered.


     string DecimalToBase(int iDec, int numbase)


            string strBin = "";

            int[] result = new int[32];

            int MaxBit = 32;

            for (; iDec > 0; iDec /= numbase)


                int rem = iDec % numbase;

                result[--MaxBit] = rem;


            for (int i = 0; i < result.Length; i++)

                if ((int)result.GetValue(i) >= base10)

                    strBin += cHexa[(int)result.GetValue(i) % base10];


                    strBin += result.GetValue(i);

            strBin = strBin.TrimStart(new char[] { '0' });

            return strBin;



 The method BaseToDecimal is modified for there was an un-necessary check for hexa-decimal input.


     int BaseToDecimal(string sBase, int numbase)


            int dec = 0;

            int b;

            int iProduct = 1;

            string sHexa = "";

            if (sBase.IndexOfAny(cHexa) >= 0)

                for (int i = 0; i < cHexa.Length; i++)

                    sHexa += cHexa.GetValue(i).ToString();

            for (int i = sBase.Length - 1; i >= 0; i--, iProduct *= numbase)


                string sValue = sBase[i].ToString();

                if (sValue.IndexOfAny(cHexa) >= 0)

                    b = iHexaNumeric[sHexa.IndexOf(sBase[i])];


                    b = (int)sBase[i] - asciiDiff;

                dec += (b * iProduct);


            return dec;



Both the methods are activated according to the user inputs and invoked by pressing the Left Soft key for “Convert”.


if (comboBox1.SelectedItem.ToString() != "10" && comboBox2.SelectedItem.ToString() != "10")


    String temp = BaseToDecimal(textBox1.Text, Int32.Parse(comboBox1.Text)).ToString();

    textBox3.Text = DecimalToBase(Int32.Parse(temp), Int32.Parse(comboBox2.Text));


else if (comboBox2.SelectedItem.ToString() == "10")

    textBox3.Text = BaseToDecimal(textBox1.Text, Int32.Parse(comboBox1.Text)).ToString();

else if (comboBox1.SelectedItem.ToString() == "10")

    textBox3.Text = DecimalToBase(Int32.Parse(textBox1.Text), Int32.Parse(comboBox2.Text));


Some sample outputs:


Converting a decimal to Binary number:





Converting a decimal to octal number:




Converting a binary to decimal number:




Converting an octal to binary number:






This Numeric Converter is easy to install in your Pocket PC and is available for download using the link given in the top of the article. The deployment of this application can be done through Visual Studio 2008 or you may manually transfer the files using Windows Mobile Device Center.


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