In C++, one uses the sprintf function to build a formatted string like this:
char szOutput[256];
sprintf(szOutput, "At loop position %d.\n", i);
The C# equivalent is the String.Format method [string.format(string, object)].
TrkCmnRec.szMillOrderNbr = String.Format("MO #{0}", i);
Each placeholder in the string is numeric, so if we want to have a string with three placeholders, we would use
{0}, {1}, {2},...{n} as shown in this example:
String sA = "Test string"
int i = 10;
Single f = 45.0
String s = String.Format("String = {0}, int = {1}, Single= {2}", sA, i, f};
String, numeric and date data types have their own formatting specifiers.
Numeric Format Specifiers
| Specifier |
Description |
Example |
C# |
| c |
Currency; specify the number of decimal places |
$12,345.00 |
string.Format("Currency: {0:c}", iNbr) |
| d |
Whole numbers; specifies the minimum number of digits - zeroes will be used to pad the result |
12345 |
string.Format("Whole: {0:d}", iNbr) |
| e |
Scientific notation; specifies the number of decimal places |
1.2345e+004 |
string.Format("Exponential: {0:e}", iNbr) |
| f |
Fixed-point; specifies the number of decimal places |
12345.00 |
string.Format("Fixed: {0:f3}", iNbr) |
| n |
Fixed-point with comma separators; specifies the number of decimal places |
12,345.00 |
string.Format("Fixed formatted: {0:n3}", iNbr) |
| p |
percentage; specifies the number of decimal places |
1,234,500.00% |
string.Format("Percentage: {0:p2}", iNbr) |
| x |
Hexadecimal |
3039 |
string.Format("Hexadecimal: {0:x}", iNbr) |