Truncate number of digit of double value in C#

Question

How can i truncate the leading digit of double value in C#,I have tried Math.Round(doublevalue,2) but not giving the require result. and i didn\'t find any other method in M

Answer 1

This maybe for decimal? I wrote my own coz of struggling to find answers online. This code is probably not fullproof as I lack the experience to fullproof it. Will eventually rebuild this method into something simple and awesome to get the job done in fewer steps with overall robustness improved too. You could easily convert it to take an input for spacing count. but I can not guarentee that it will function properly with other than two dec. Does not like plain inputs.. It seems to like a few 000.000 to work with as I am processing weight with 0000.000's coming through. Also, rounding prices with this after being calculated.

private decimal TruncateToTwoDecimals(string value)
        {

            int error_ReturnZeroIfThisIsOne = 0;
            int tempArrayLength = value.Length;
            char[] tempArray = new char[tempArrayLength];

            int startCount = 0; //starts the counter when it hits punctuation
            int newCounter = 0; //counts twice to ensure only two decimal places after the comma/period
            int nextArraySize = 1; //gets the size spec ready for the return array/next array (needs to be + 1)

            int tempArrayCurrentIndex = 0;
            foreach (Char thisChar in value)
            {
                tempArray[tempArrayCurrentIndex] = thisChar;
                tempArrayCurrentIndex++;
            }


            for (int i = 0; i < tempArrayLength; i++)
            {

                if (tempArray[i].ToString() == "," || tempArray[i].ToString() == ".")
                {
                    startCount = 1;
                }
                if (startCount == 1)
                {
                    newCounter++;
                }


                if (newCounter > 2)
                {
                    break;
                }
                nextArraySize++;
            }

            char[] returnArray = new char[nextArraySize];
            int tempErrorCheckBelow = 0;
            for (int i = 0; i < nextArraySize; i++)
            {


                try
                {
                    returnArray[i] = tempArray[i]; //left array will read [i] till the spot in right array where second decimal and ignore the rest. snip snip
                }
                catch (Exception)
                {
                    if (tempErrorCheckBelow == 2)
                    {
                        MessageBox.Show("OutOfBounds", "Error_ArrayIndex Out Of Bounds @TTTD");
                    }
                    returnArray[i] = Convert.ToChar("0");
                    tempErrorCheckBelow++;
                }

            }

            if (tempArrayLength < 1)
            {

                error_ReturnZeroIfThisIsOne++;

                string tempString = "0.0";
                try
                {
                    decimal tempDecimal = Decimal.Parse(tempString);
                    return tempDecimal;
                }
                catch (Exception)
                {

                    MessageBox.Show("Error_input String received Incorrect Format @TTTD");
                    return 0.00m;
                }
            }
            else
            {

                error_ReturnZeroIfThisIsOne++;

                string tempString = " ";
                tempString = new string(returnArray);
                try
                {
                    decimal tempDecimal = Decimal.Parse(tempString);
                    return tempDecimal;
                }
                catch (Exception)
                {
                    MessageBox.Show("Error_inputString _0_ @TTTD");
                    return 0m;

                }
            }



        }