Develop Reference

How do I display the contents of an array without having the "0"'s in the display using a foreach loop?

public partial class frmEnhancedInvoiceTotal : Form
{
public frmEnhancedInvoiceTotal()
{
InitializeComponent();
}
private void BtnExit_Click(object sender, EventArgs e)
{
Close();
}
decimal[] decTotalofInvoicesArray = new decimal[5];
int intNumberOfInvoices = 0; //global variables
decimal decTotalOfInvoicesVariable = 0m;
decimal decAverageOfInvoices = 0m;
private void BtnCalculate_Click(object sender, EventArgs e)
{
//Convert = Class, .ToDecimal = method,
//when the user clicks the calulate button,
//we collect the subtotal, determine the appropriate discount,
//calculate the total and output the result to the screen.
//***EARN PARTIAL CREDIT PUT COMMENTS***
//Input
try
{
decimal decSubtotal = 0m; //initialize subtotal with a value of zero. We'll collect from the user later.
if (Decimal.TryParse(txtSubtotal.Text,
System.Globalization.NumberStyles.Currency, //now can type a $ sign and now break the code
System.Globalization.CultureInfo.CurrentCulture,
out decSubtotal)) //.tryparse attempts to convert but is a fail safe
//parse does 2 things - does something and tells you if works
decTotalofInvoicesArray[intNumberOfInvoices] = decSubtotal;
{
//Processing
decimal decDiscountPercent = 0m; //defining a new variable (discount percent) allow for real #, giving it a intial value of 0. Decimal variables you have to add m
if (decSubtotal >= 500m) //if my subtotal is 500 or more
{
decDiscountPercent = 0.2m; //inside braces is what will happen to the question above
//set discount rate to 20%
}
else if (decSubtotal < 500m && decSubtotal >= 250m) //if subtotal is between 250 & 500
//^^redundant because < 500 is already stated in the first if statement
//could just right else if(decSubtotal >=250m)
{
decDiscountPercent = 0.15m; //set discount rate to 15%
}
else if (decSubtotal < 250m && decSubtotal >= 100m) //if subtotal is between 100 and 250
{
decDiscountPercent = 0.1m; //set discount to 10%
}
//if subtotal is less than 100, dicounter percent is 0%
decimal decDiscountAmount = decDiscountPercent * decSubtotal;
decimal decTotal = decSubtotal - decDiscountAmount; //He is going so fast
//Aggregate Processing - across mutliple clicks of the calculate button
//old way of doing it = intNumberOfInvoices = intNumberOfInvoices + 1;
intNumberOfInvoices++; //value of variable plus one
//old way of doing it decTotalOfInvoices = decTotalOfInvoices + decTotal;
decimal decSum = 0m;
for (int intColIndex = 0; intColIndex < decTotalofInvoicesArray.Length; intColIndex++)
{
decSum += decTotalofInvoicesArray[intColIndex];
}
decTotalOfInvoicesVariable = decSum;
decAverageOfInvoices = decSum / decTotalofInvoicesArray.Length;
//Output
txtSubtotal.Text = decSubtotal.ToString("c");
txtDiscountPercent.Text = decDiscountPercent.ToString("p2"); //sending a numeric value and sending it to text = gives error
txtDiscountAmount.Text = decDiscountAmount.ToString("c"); //dot ToString makes value a text value and sends to textbox in form
//c=currency //"p2" - 2 = how many decimal places
//P = percentage
txtTotal.Text = decTotal.ToString("c");
//aggregate output
txtNumberOfInvoices.Text = intNumberOfInvoices.ToString();
txtTotalOfInvoices.Text = decTotalOfInvoicesVariable.ToString("c");
txtAverageOfInvoices.Text = decAverageOfInvoices.ToString("c");
//breakpoint analysis = click on the grey side bar and slowly work through the code to find the error. Essentially pause the code and run the code one point at a time
}
}
catch (FormatException) //you do not know what went wrong in the try part. It just errors anyways because SOMETHING went wrong
{
MessageBox.Show("Please enter valid numeric values.", "Entry Error");
}
catch (OverflowException) //something is to big
{
MessageBox.Show("Please try smaller numbers", "Entry Error");
}
catch //generic error code because why not
{
MessageBox.Show("An unexpected error has occured. Please try again.", "Entry Error");
}
}
private void BtnClearTotals_Click(object sender, EventArgs e)
{
//When resetting aggregate/global info - need to reset the variables AND the visual interface
intNumberOfInvoices = 0;
decTotalOfInvoicesVariable = 0m;
decAverageOfInvoices = 0m;
// txtNumberOfInvoices.Text = ""; //setting the variable to nothing. Erase the information in the text box
txtNumberOfInvoices.Clear();
txtTotalOfInvoices.Clear();
txtAverageOfInvoices.Clear();
}
private void TxtSubtotal_TextChanged(object sender, EventArgs e)
{
txtDiscountPercent.Clear();
txtDiscountAmount.Clear();
txtTotal.Clear();
}
private void BtnDisplayTotals_Click(object sender, EventArgs e)
{
String strOrderTotals = "";
//for (int intColIndex = 0; intColIndex < intNumberOfInvoices; intColIndex++)
//{
// strOrderTotals += decTotalofInvoicesArray[intColIndex] + "\n";
//}
foreach (decimal decTotalInvoices in decTotalofInvoicesArray)
{
if (strOrderTotals == "0")
{
strOrderTotals += decTotalInvoices + "\n";
}
}
MessageBox.Show(strOrderTotals.ToString());
}
private bool IsValidData()
{
return
IsPresent(txtSubtotal) && //did you type anyting
IsDecimal(txtSubtotal) && //make sure you types a real number
IsWithinRange(txtSubtotal, 0m, 1000m); //is the number in the range
}
private bool IsPresent(TextBox textBox) //send an entire textbox into method
{
if (textBox.Text == "")
{
MessageBox.Show(textBox.Tag.ToString() + " is a required field.", "Missing Entry"); //textbox is whatever is in the (TextBox textBox)
textBox.Focus();
return false;
}
return true;
}
private bool IsDecimal(TextBox textBox)
{
decimal decTestValue = 0m;
if (!Decimal.TryParse(textBox.Text, out decTestValue)) //! - dont succusfully tryparse
{
MessageBox.Show(textBox.Tag.ToString() + " must be a numeric value", "Entry Error"); //textbox is whatever is in the (TextBox textBox)
textBox.Focus();
return false;
}
return true;
}
private bool IsInteger(TextBox textBox)
{
int intTestValue = 0;
if (!Int32.TryParse(textBox.Text, out intTestValue)) //! - dont succusfully tryparse
{
MessageBox.Show(textBox.Tag.ToString() + " must be a whole number.", "Missing Entry"); //textbox is whatever is in the (TextBox textBox)
textBox.Focus();
return false;
}
return true;
}
private bool IsWithinRange(TextBox textBox, decimal decMin, decimal decMax)
{
decimal decTestValue = Convert.ToDecimal(textBox.Text);
if (decTestValue < decMin || decTestValue > decMax) //to small or to big
{
MessageBox.Show(textBox.Tag.ToString() + " must be between " + decMin.ToString() + " and " + decMax.ToString() + "." + "Out of Range"); //textbox is whatever is in the (TextBox textBox)
textBox.Focus();
return false;
}
return true;
}
}
}
Basically I have a invoice total windows form were the user inputs a subtotal value and total value is calculated based on the discount percent. In the assignment is says to create an array that hold up to five invoice totals. My problem is when I type lets say 2 subtotal values and click display totals the 2 number I typed in are displayed along with 3 zeros. I am wanting to know how to only display the number I inputted and not the zeros using a foreach loop.

It does not look like you are adding anything in your foreach.
foreach (decimal decTotalInvoices in decTotalofInvoicesArray)
{
if (strOrderTotals == "0")
{
strOrderTotals += decTotalInvoices + "\n";
}
}
MessageBox.Show(strOrderTotals.ToString());
Am I reading this right that you want to have each invoice shown, and do you want the total too? This code with a for loop should work. I
strOrderTotals = "My Invoices\n";
decimal decOrderTotals = 0;
for (int i = 0; i < decTotalofInvoicesArray.Length; i++)
{
if (decTotalofInvoicesArray[i] != 0)
{
strOrderTotals += "Invoice : " + decTotalofInvoicesArray[i] + "\n";
decOrderTotals += decTotalofInvoicesArray[i];
}
}
strOrderTotals += "Total of invoices: " + decOrderTotals;
MessageBox.Show(strOrderTotals.ToString());

How Can You Calculate Multiple Textboxes?

I need help with my program in Visual Studio C#. The user must be able to enter a value into the four blank textboxes. The numbers in the textboxes should multiply with their set prices when the user clicks on Calculate. In other words, I want the four textboxes to multiply with their price.
The Form
Here's the calculation code. I managed to get the Children 5-12 textbox to calculate.
private void btnCalculate_Click (object sender, EventArgs e)
{
int FirstTextBoxNumber;
int SecondTextBoxNumber;
int answer;
try
{
Convert.ToInt32(tbSecondNumber.Text);
FirstTextBoxNumber = int.Parse("2");
SecondTextBoxNumber = int.Parse(tbSecondNumber.Text);
answer = FirstTextBoxNumber * SecondTextBoxNumber;
MessageBox.Show("Your total is £" + answer.ToString());
}
catch (FormatException)
{
MessageBox.Show("Please enter a decimal value");
}
}
How the form calculates

Try the following inside your btnCalculate_Click code:
bool isNumeric = true;
double answer = 0;
double firstTextBoxNumber = 0;
double thirdTextBoxNumber = 0;
double fifthTextBoxNumber = 0;
double seventhTextBoxNumber = 0;
int secondTextBoxNumber = 0;
int fourthTextBoxNumber = 0;
int sixTextBoxNumber = 0;
int eightTextBoxNumber = 0;
try
{
if (String.IsNullOrWhiteSpace(tbFirstNumber.Text) || String.IsNullOrWhiteSpace(tbSecondNumber.Text) || String.IsNullOrWhiteSpace(tbThirdNumber.Text) || String.IsNullOrWhiteSpace(tbFourthNumber.Text) || String.IsNullOrWhiteSpace(tbFifthNumber.Text) || String.IsNullOrWhiteSpace(tbSixNumber.Text) || String.IsNullOrWhiteSpace(tbSeventhNumber.Text) || String.IsNullOrWhiteSpace(tbEightNumber.Text))
{
isNumeric = false;
}
else
{
//Check if "Prices" are all Doubles
if (isNumeric)
{
isNumeric = double.TryParse(tbFirstNumber.Text.Replace("£", ""), out firstTextBoxNumber);
}
if (isNumeric)
{
isNumeric = double.TryParse(tbThirdNumber.Text.Replace("£", ""), out thirdTextBoxNumber);
}
if (isNumeric)
{
isNumeric = double.TryParse(tbFifthNumber.Text.Replace("£", ""), out fifthTextBoxNumber);
}
if (isNumeric)
{
isNumeric = double.TryParse(tbSeventhNumber.Text.Replace("£", ""), out seventhTextBoxNumber);
}
//Check if "Qty" are all Integers
if (isNumeric)
{
isNumeric = int.TryParse(tbSecondNumber.Text, out secondTextBoxNumber);
}
if (isNumeric)
{
isNumeric = int.TryParse(tbFourthNumber.Text, out fourthTextBoxNumber);
}
if (isNumeric)
{
isNumeric = int.TryParse(tbSixNumber.Text, out sixTextBoxNumber);
}
if (isNumeric)
{
isNumeric = int.TryParse(tbEightNumber.Text, out eightTextBoxNumber);
}
}
if (isNumeric)
{
answer = firstTextBoxNumber * secondTextBoxNumber;
answer += thirdTextBoxNumber * fourthTextBoxNumber;
answer += fifthTextBoxNumber * sixTextBoxNumber;
answer += seventhTextBoxNumber * eightTextBoxNumber;
MessageBox.Show("Your total is £" + answer.ToString());
}
else
{
MessageBox.Show("Please enter a decimal value");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
The Try Catch block was changed because you should only handle system errors in Try blocks.
Please do note, I made the following assumptions:
The price can change, and can be changed to include cents and fractions of cents.
The price will only remove "£" and no other currency logos.
The Qty will always be an int since you can't have 1.5 children.
You are ok with the system error being shown in a message box to the
user instead of being logged somewhere.
Since this was quick, the code could be expanded on to remove some of the assumptions and to add rounding.

OK. I'm going to try to explain it to you:
You have 8 textboxes in your form.
They all have an identifier like textBox1, textBox2 etc..
What you want to take textBox1 and multiply it by textBox2. And this the same for the other 3 pairs. Then add up the total and display it in a messageBox.
I'll try to send you the right way:
private void btnCalculate_Click (object sender, EventArgs e)
{
int FirstPrice, SecondPrice, ThirdPrice, FourthPrice;
int FirstQnty, SecondQnty, ThirdQnty, FourthQnty;
int answer = 0;
try
{
FirstPrice = (int)TextBox1.Text.Replace("£", "");
SecondPrice = (int)TextBox2.Text;
ThirdPrice = (int)TextBox3.Text.Replace("£", "");
FourthPrice = (int)TextBox4.Text;
FirstQty = (int)TextBox5.Text.Replace("£", "");
SecondQty = (int)TextBox6.Text;
ThirdQty = (int)TextBox7.Text.Replace("£", "");
FourthQty = (int)TextBox8.Text;
answer = FirstPrice * FirstQty;
answer += SecondPrice * SecondQty;
answer += ThirdPrice * ThirdQty;
answer += FourthPrice * FourthQty;
MessageBox.Show("Your total is £" + answer.ToString());
}
catch (FormatException)
{
MessageBox.Show("Please enter a decimal value");
}
}
It might contain some spelling errors, but it should work.
Just replace the TextBox identifiers to the ones in your form.

C# - How can I convert the string value to decimal places?

Basically, ive created a form that I can select different shapes that when a value on the track bar is selected, works out both the area and boundary length of either a circle, triangle or square.
The values are currently coming through with a lot of decimal places and I want to set up radio buttons to choose whether 2, 3 or 4 decimal places.
private void sliderBar(object sender, EventArgs e)
{
textBox3.Text = trackBar1.Value.ToString();
if(circleButton.Checked == true)
{
textBox2.Text = (circle.getArea(trackBar1.Value)).ToString();
textBox1.Text = (circle.getBoundLength(trackBar1.Value)).ToString();
}
else if(squareButton.Checked == true)
{
textBox2.Text = (square.getArea(trackBar1.Value)).ToString();
textBox1.Text = (square.getBoundLength(trackBar1.Value)).ToString();
}
else
{
textBox2.Text = (triangle.getArea(trackBar1.Value)).ToString();
textBox1.Text = (triangle.getBoundLength(trackBar1.Value)).ToString();
}
if (decimalPlaces2Button.Checked == true)
{
TextBox2.Text = decimal.Round(textBox2, 2, MidpointRounding.AwayFromZero).ToDouble();
}
}

Here's a working solution which does not Round your number.
static double TakeDecimals(double value, int decimalCount)
{
var truncation = Math.Pow(10, decimalCount);
return Math.Truncate(value * truncation) / truncation;
}
Called like
var input=24.343545;
TakeDecimals(input, 2);//24.34
TakeDecimals(input, 3);//24.343
TakeDecimals(input, 4);//24.3435
UPDATE
In your case, having a string, you can do Convert.ToDouble(yourString) before calling the method.

You can use Math.Round(double, int32)
Math.Round(value, 2);

you can use this:
decimal convertedValue;
decimal.TryParse(textBox2.Text,out convertedValue);
textBox2.Text = Math.Round(convertedValue, 2).ToString();

First convert string to decimal using "Convert.ToDecimal". Then use "Math.Round" to round the decimal number(2, 3 or 4 decimal places).
decimal area;
textBox3.Text = trackBar1.Value.ToString();
if(circleButton.Checked == true)
{
area = circle.getArea(trackBar1.Value)
textBox2.Text = area.ToString();
textBox1.Text = (circle.getBoundLength(trackBar1.Value)).ToString();
}
else if(squareButton.Checked == true)
{
area = square.getArea(trackBar1.Value)
textBox2.Text = area.ToString();
textBox1.Text = (square.getBoundLength(trackBar1.Value)).ToString();
}
else
{
area = triangle.getArea(trackBar1.Value)
textBox2.Text = area.ToString();
textBox1.Text = (triangle.getBoundLength(trackBar1.Value)).ToString();
}
if (decimalPlaces2Button.Checked == true)
{
decimal number1 = Convert.ToDecimal(area);
decimal numWithTwoDecimalPlace = Math.Round(number1, 2);
TextBox2.Text = numWithTwoDecimalPlace.ToString();
}
else if (decimalPlaces3Button.Checked == true)
{
decimal number1 = Convert.ToDecimal(area);
decimal numWithTwoDecimalPlace = Math.Round(number1, 3);
TextBox2.Text = numWithTwoDecimalPlace.ToString();
}

C# function to convert text input of feet/inches/meters/centimeters/millimeters into numeric values

I'm writing a function to take shorthand values and convert them into a standardized numeric format. Is there any standard code out there that would do "best possible" conversion of arbitrary measurement text and turn it into numeric measurements if the text is valid?
I guess I'm looking for something like bool TryParseMeasurement(string s, out decimal d). Does anyone know of a function like this?
Here's an example of some of the input values I've seen:
Imperial
6 inches
6in
6”
4 feet 2 inches
4’2”
4 ‘ 2 “
3 feet
3’
3 ‘
3ft
3ft10in
3ft 13in (should convert to 4’1”)
Metricc
1m
1.2m
1.321m
1 meter
481mm

Here's some code we wrote in an app quite some time ago, where we were doing something similar. It's not the best, but you may be able to adapt, or get some sort of jumping off point.
public static class UnitConversion
{
public static string[] lstFootUnits = new string[] {"foots", "foot", "feets", "feet", "ft", "f", "\""};
public static string sFootUnit = "ft";
public static string[] lstInchUnits = new string[] { "inches", "inchs", "inch", "in", "i", "\'" };
public static string sInchUnit = "in";
public static string[] lstPoundUnits = new string[] { "pounds", "pound", "pnds", "pnd", "lbs", "lb", "l", "p" };
public static string sPoundUnit = "lbs";
public static string[] lstOunceUnits = new string[] { "ounces", "ounce", "ozs", "oz", "o" };
public static string sOunceUnit = "oz";
public static string[] lstCentimeterUnits = new string[] { "centimeters", "centimeter", "centimetres", "centimetre", "cms", "cm", "c"};
public static string sCentimeterUnit = "cm";
public static string[] lstKilogramUnits = new string[] { "kilograms", "kilogram", "kilos", "kilo", "kgs", "kg", "k" };
public static string sKilogramsUnit = "kgs";
/// <summary>
/// Attempt to convert between feet/inches and cm
/// </summary>
/// <param name="sHeight"></param>
/// <returns></returns>
public static string ConvertHeight(string sHeight)
{
if (!String.IsNullOrEmpty(sHeight))
{
sHeight = UnitConversion.CleanHeight(sHeight);
if (sHeight.Contains(UnitConversion.sFootUnit))
{
sHeight = sHeight.Replace(UnitConversion.sFootUnit, "|");
sHeight = sHeight.Replace(UnitConversion.sInchUnit, "|");
string[] sParts = sHeight.Split('|');
double? dFeet = null;
double? dInches = null;
double dFeetParsed;
double dInchesParsed;
if (sParts.Length >= 2 && double.TryParse(sParts[0].Trim(), out dFeetParsed))
{
dFeet = dFeetParsed;
}
if (sParts.Length >= 4 && double.TryParse(sParts[2].Trim(), out dInchesParsed))
{
dInches = dInchesParsed;
};
sHeight = UnitConversion.FtToCm(UnitConversion.CalculateFt(dFeet ?? 0, dInches ?? 0)).ToString() + " " + UnitConversion.sCentimeterUnit;
}
else if (sHeight.Contains(UnitConversion.sCentimeterUnit))
{
sHeight = sHeight.Replace(UnitConversion.sCentimeterUnit, "|");
string[] sParts = sHeight.Split('|');
double? dCentimeters = null;
double dCentimetersParsed;
if (sParts.Length >= 2 && double.TryParse(sParts[0].Trim(), out dCentimetersParsed))
{
dCentimeters = dCentimetersParsed;
}
int? iFeet;
int? iInches;
if (UnitConversion.CmToFt(dCentimeters, out iFeet, out iInches))
{
sHeight = (iFeet != null) ? iFeet.ToString() + " " + UnitConversion.sFootUnit : "";
sHeight += (iInches != null) ? " " + iInches.ToString() + " " + UnitConversion.sInchUnit : "";
sHeight = sHeight.Trim();
}
else
{
sHeight = "";
}
}
else
{
sHeight = "";
}
}
else
{
sHeight = "";
}
return sHeight;
}
/// <summary>
/// Attempt to convert between Kgs and Lbs
/// </summary>
/// <param name="sWeight"></param>
/// <returns></returns>
public static string ConvertWeight(string sWeight)
{
if (!String.IsNullOrEmpty(sWeight))
{
sWeight = UnitConversion.CleanWeight(sWeight);
if (sWeight.Contains(UnitConversion.sKilogramsUnit))
{
sWeight = sWeight.Replace(UnitConversion.sKilogramsUnit, "|");
string[] sParts = sWeight.Split('|');
double? dKilograms = null;
double dKilogramsParsed;
if (sParts.Length >= 2 && double.TryParse(sParts[0].Trim(), out dKilogramsParsed))
{
dKilograms = dKilogramsParsed;
}
sWeight = UnitConversion.KgToLbs(dKilograms).ToString("#.###") + " " + UnitConversion.sPoundUnit;
}
else if (sWeight.Contains(UnitConversion.sPoundUnit))
{
sWeight = sWeight.Replace(UnitConversion.sPoundUnit, "|");
string[] sParts = sWeight.Split('|');
double? dPounds = null;
double dPoundsParsed;
if (sParts.Length >= 2 && double.TryParse(sParts[0].Trim(), out dPoundsParsed))
{
dPounds = dPoundsParsed;
}
sWeight = UnitConversion.LbsToKg(dPounds).ToString("#.###") + " " + UnitConversion.sKilogramsUnit;
}
else
{
sWeight = "";
}
}
else
{
sWeight = "";
}
return sWeight;
}
public static double? CalculateFt(double dFt, double dInch)
{
double? dFeet = null;
if (dFt >= 0 && dInch >= 0 && dInch <= 12)
{
dFeet = dFt + (dInch / 12);
}
return dFeet;
}
public static double KgToLbs(double? dKg)
{
if (dKg == null)
{
return 0;
}
return dKg.Value * 2.20462262;
}
public static double LbsToKg(double? dLbs)
{
if (dLbs == null)
{
return 0;
}
return dLbs.Value / 2.20462262;
}
public static double FtToCm(double? dFt)
{
if (dFt == null)
{
return 0;
}
return dFt.Value * 30.48;
}
public static bool CmToFt(double? dCm, out int? iFt, out int? iInch)
{
if (dCm == null)
{
iFt = null;
iInch = null;
return false;
}
double dCalcFeet = dCm.Value / 30.48;
double dCalcInches = dCalcFeet - Math.Floor(dCalcFeet);
dCalcFeet = Math.Floor(dCalcFeet);
dCalcInches = dCalcInches * 12;
iFt = (int)dCalcFeet;
iInch = (int)dCalcInches;
return true;
}
private static string CleanUnit(string sOriginal, string[] lstReplaceUnits, string sReplaceWithUnit)
{
System.Text.StringBuilder sbPattern = new System.Text.StringBuilder();
foreach (string sReplace in lstReplaceUnits)
{
if (sbPattern.Length > 0)
{
sbPattern.Append("|");
}
sbPattern.Append(sReplace);
}
sbPattern.Insert(0,#"(^|\s)(");
sbPattern.Append(#")(\s|$)");
System.Text.RegularExpressions.Regex rReplace = new System.Text.RegularExpressions.Regex(sbPattern.ToString(), System.Text.RegularExpressions.RegexOptions.IgnoreCase);
sOriginal = rReplace.Replace(sOriginal, sReplaceWithUnit);
/*foreach (string sReplace in lstReplaceUnits)
{
sOriginal = sOriginal.Replace(sReplace, " " + sReplaceWithUnit);
}*/
return sOriginal;
}
private static bool StringHasNumbers(string sText)
{
System.Text.RegularExpressions.Regex rxNumbers = new System.Text.RegularExpressions.Regex("[0-9]+");
return rxNumbers.IsMatch(sText);
}
private static string ReduceSpaces(string sText)
{
while (sText.Contains(" "))
{
sText = sText.Replace(" ", " ");
}
return sText;
}
private static string SeperateNumbers(string sText)
{
bool bNumber = false;
if (!String.IsNullOrEmpty(sText))
{
for (int iChar = 0; iChar < sText.Length; iChar++)
{
bool bIsNumber = (sText[iChar] >= '0' && sText[iChar] <= '9') ||
(sText[iChar] == '.' && iChar < sText.Length - 1 && sText[iChar + 1] >= '0' && sText[iChar + 1] <= '9');
if (iChar > 0 && bIsNumber != bNumber)
{
sText = sText.Insert(iChar, " ");
iChar++;
}
bNumber = bIsNumber;
}
}
return sText;
}
public static string CleanHeight(string sHeight)
{
if (UnitConversion.StringHasNumbers(sHeight))
{
sHeight = SeperateNumbers(sHeight);
sHeight = CleanUnit(sHeight, UnitConversion.lstFootUnits, UnitConversion.sFootUnit);
sHeight = CleanUnit(sHeight, UnitConversion.lstInchUnits, UnitConversion.sInchUnit);
sHeight = CleanUnit(sHeight, UnitConversion.lstCentimeterUnits, UnitConversion.sCentimeterUnit);
sHeight = SeperateNumbers(sHeight);
sHeight = ReduceSpaces(sHeight);
}
else
{
sHeight = "";
}
return sHeight;
}
public static string CleanWeight(string sWeight)
{
if (UnitConversion.StringHasNumbers(sWeight))
{
sWeight = SeperateNumbers(sWeight);
sWeight = CleanUnit(sWeight, UnitConversion.lstOunceUnits, UnitConversion.sOunceUnit);
sWeight = CleanUnit(sWeight, UnitConversion.lstPoundUnits, UnitConversion.sPoundUnit);
sWeight = CleanUnit(sWeight, UnitConversion.lstKilogramUnits, UnitConversion.sKilogramsUnit);
sWeight = SeperateNumbers(sWeight);
sWeight = ReduceSpaces(sWeight);
}
else
{
sWeight = "";
}
return sWeight;
}
}

It should serve you well to build an extension method of string for this purpose. When you build an extension method you attach a new function call to an existing class. In this we are go to attach a method to the 'string' class that returns a double, as the number of millimeters in a given imperial value, PROVIDED that the value can be parsed based on the examples you provide.
using System;
using System.Text;
namespace SO_Console_test
{
static class ConversionStringExtensions
{
//this is going to be a simple example you can
//fancy it up a lot...
public static double ImperialToMetric(this string val)
{
/*
* With these inputst we want to total inches.
* to do this we want to standardize the feet designator to 'f'
* and remove the inch designator altogether.
6 inches
6in
6”
4 feet 2 inches
4’2”
4 ‘ 2 “
3 feet
3’
3 ‘
3ft
3ft10in
3ft 13in (should convert to 4’1”) ...no, should convert to 49 inches, then to metric.
*/
//make the input lower case and remove blanks:
val = val.ToLower().Replace(" ", string.Empty);
//make all of the 'normal' feet designators to "ft"
string S = val.Replace("\'", "f").Replace("feet", "f").Replace("ft", "f").Replace("foot", "f").Replace("‘", "f").Replace("’", "f");
//and remove any inch designator
S = S.Replace("\"", string.Empty).Replace("inches", string.Empty).Replace("inch", string.Empty).Replace("in", string.Empty).Replace("“", string.Empty).Replace("”", string.Empty);
//finally we have to be certain we have a number of feet, even if that number is zero
S = S.IndexOf('f') > 0 ? S : "0f" + S;
//now, any of the inputs above will have been converted to a string
//that looks like 4 feet 2 inches => 4f2
string[] values = S.Split('f');
int inches = 0;
//as long as this produces one or two values we are 'on track'
if (values.Length < 3)
{
for (int i = 0; i < values.Length; i++)
{
inches += values[i] != null && values[i] != string.Empty ? int.Parse(values[i]) * (i == 0 ? 12 : 1) : 0 ;
}
}
//now inches = total number of inches in the input string.
double result = inches * 25.4;
return result;
}
}
}
With that in place "ImperialToMetric()" becomes a method of any string, and can be invoked anywhere the extension containing class ConversionStringExtensions is referenced. You can use it like:
namespace SO_Console_test
{
class Program
{
static void Main(string[] args)
{
showConversion();
Console.ReadLine();
}
private static void showConversion()
{
//simple start:
Console.WriteLine("6ft 2\"".ImperialToMetric().ToString() + " mm");
//more robust:
var Imperials = new List<string>(){"6 inches",
"6in",
"6”",
"4 feet 2 inches",
"4’2”",
"4 ‘ 2 “",
"3 feet",
"3’",
"3 ‘",
"3ft",
"3ft10in",
"3ft 13in"};
foreach (string imperial in Imperials)
{
Console.WriteLine(imperial + " converted to " + imperial.ImperialToMetric() + " millimeters");
}
}
}
Obviously, at this point a call to "Fred".ImperialToMetric is not going to play nice. You will need to had error handling and perhaps some options to turn 1234 mm 1.234 km etc. but once you flush this out you have a method you can use where ever you choose.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication5
{
class Program
{
static void Main(string[] args)
{
double km,m,f,i,cm;
Console.WriteLine("The distance between karachi and lahore in (kilometer)km is=");
km = Convert.ToInt32(Console.ReadLine());
m = km * 1000;
Console.WriteLine("The distance between karachi and lahore in meter(m) is="+m);
f = km * 3280.84;
Console.WriteLine("The distance between karachi and lahore in feet(f) is="+f);
i = km * 39370.1;
Console.WriteLine("The distance between karachi and lahore in inches(i) is="+i);
cm = m * 100;
Console.WriteLine("The distance between karachi and lahore in centimeter(cm) is="+cm);
Console.ReadLine();
}
}
}

An extension for string I wrote only to find out that there is already a solution here :) The only thing left to do is to replace "feet", "ft", "’" to "'" and "inches", "inch", "in", "“", "\"" to "''".
using System;
namespace CustomExtensions
{
public static class StringExtension
{
const float mPerFeet = 30.48f / 100;
const float mPerInch = 2.54f / 100;
// input options:
// 5'
// 5'6''
// 18''
// 24''
// 5'6
// 5 ' 6 ''
// 5' 6''
// corner cases:
// '' will return 0
// 5''6'' will interpret as 5'6''
// 5'6' will interpret as 5'6''
// 6 will interpret as 6''
// 6''' will interpret as 6''
public static float MetersFromFeetInches(this string feetInches)
{
float feet = 0;
float inches = 0;
string[] separators = new string[] { "'", "''", " " };
string[] subs = feetInches.Split(separators, StringSplitOptions.RemoveEmptyEntries);
if (subs.Length == 1)
{
if (feetInches.Trim().EndsWith("''"))
{
float.TryParse(subs[0], out inches);
}
else if (!feetInches.Trim().EndsWith("''") && !feetInches.Trim().EndsWith("'"))
{
float.TryParse(subs[0], out inches);
}
else
{
float.TryParse(subs[0], out feet);
}
}
else if (subs.Length > 1)
{
float.TryParse(subs[0], out feet);
float.TryParse(subs[1], out inches);
}
return feet * mPerFeet + inches * mPerInch;
}
}
}

how to dynamically generate a formula and solive it by selecting multiple rows using linq

hi guys i have an array called tblCeMaintMatrix.ToArray()) with a result of :
[0]: { xValue = 0, Operator = 43 '+' }
[1]: { xValue = 1, Operator = 43 '+' }
[2]: { xValue = 12, Operator = 45 '-' }
i made a foreach loop to solve this however i encountered some errors. I think i confused the logic for this..
foreach (var a in tblCeMaintMatrix.ToArray())
{
{
value = operate((a.Operator).ToString(),a.xValue.Value );
}
decimal value2 = value;
}
private decimal operate(String a, Decimal value)
{
Decimal Value = 0;
if (a == "+")
{
Value = value + value;
}
if (a == "-")
{
Value= value - value;
}
if (a == "*")
{
Value = value * value;
}
if (a == "/")
{
Value = value / value;
}
return Value;
}
my problem is that
a) what is does is this :
0 + 0 = 0
1 + 1 = 2
12 - 12 = 0
instead of 0 + 1 -12.
b) it doesnt retain the value.
how can i modify this to solve the problem? thanks

Non-tested code, I wish it's correct..
decimal result = 0;
foreach (var a in tblCeMaintMatrix.ToArray())
{
{
result = operate((a.Operator).ToString(),a.xValue.Value,result);
}
}
private decimal operate(String a, Decimal value, Decimal result)
{
switch (a)
{
case "+": result += value; break;
case "-": result -= value; break;
case "*": result *= value; break;
case "/": result /= value; break;
default: result = value; break;
}
return result;
}
EDIT to ignore the first operator, I think you need to set your first operator to empty, like:
[0]: { xValue = 0, Operator = '' }
[1]: { xValue = 1, Operator = 43 '+' }
[2]: { xValue = 12, Operator = 45 '-' }
and see the modified Operate method.

Right now you are only passing a single value to your operate method, and using it as both operands. You need to also pass the running total of your code to the function:
Decimal total = 0;
foreach (var a in tblCeMaintMatrix.ToArray())
{
{
total = operate((a.Operator).ToString(),total, a.xValue.Value );
}
decimal value2 = value;
}
private decimal operate(String a, Decimal left, Decimal right)
{
Decimal Value = 0;
if (a == "+")
{
Value = left + right;
}
if (a == "-")
{
Value= left - right;
}
if (a == "*")
{
Value = left * right;
}
if (a == "/")
{
Value = left / right;
}
return Value;
}
It's not clear what's your using value2 to represent in your original function.