Differences

This shows you the differences between two versions of the page.

--- strings [2018/01/21 15:01] – created wolfgangriedmann
+++ strings [2018/10/06 05:09] (current) – wolfgangriedmann
@@ Line 1: / Line 1: @@
 ====== Strings and their prefixes ======
-A string in X# is delimited by the double hyphen:
+A string in X# is delimited by the double quotation mark:
-<code>cString := "this is a string"</code>
+<code visualfoxpro>cString := "this is a string"</code>
-This is valid for the VO, Vulcan and Code dialects. In the VO dialect a string can also be delimited by the single hyphen:
+This is valid for the VO, Vulcan and Code dialects. In the VO dialect a string can also be delimited by the single quotation mark:
+<code visualfoxpro>cString := 'this is a string'</code>
-<code>cString := 'this is a string'</code>
 This is to make X# compatible to VO code.
-If you need to use special characters or double hyphens in your string, the Enhanced string does what you need:
+If you need to use special characters or double quotation mark in your string, the enhanced string does what you need:
+<code visualfoxpro>cString := e"this is a \"string\"."</code>
-<code>cString := e"this is a \"string\"."</code>
 and of course you can also embed other control characters in your string:
+<code visualfoxpro>cString := e"this is a multiline\nstring with another\nline"</code>
-<code>cString := e"this is a multiline\nstring with another\nline"</code>
 But you can do even more with interpolated strings:
+<code visualfoxpro>local cMyVar := "Hi" as string
-<code>local cMyVar := "Hi" as string
 cString := i"{cMyVar} guys"</code>
 Of course you can use both at the same time:
+<code visualfoxpro>cString := ei"this is a \"string\". that references {cVariableName}"</code>
+As variable, not only a string variable can be used, but every type of object, and under the houd the '':ToString()'' method is called:
+<code visualfoxpro>local oPerson as Person
+cString := i"This is {oPerson}"</code>
+And if you wish, you can also use formatting expressions:
+<code visualfoxpro>local nValue		as decimal
+nValue			:= 123.45m
+cString := i"nValue: {nValue:######.0000}" // nValue: 123,4500
+cString := i"nValue: {nValue:F6}" // nValue: 123,450000</code>
+In this case (as in the use with ToString()), if you need to embed the parentheses ''{'' and ''}'' in your string, they need to be doubled as in this sample:
+<code visualfoxpro>cConnection := i"Driver={{Microsoft access Driver (*.mdb)}};Dbq={cDatabaseFile};Uid=Admin;Pwd=;"</code>
-<code>cString := ei"this is a \"string\". that references {cLocalVar}"</code>
+And only in the VO dialect, you need to prefix a char with the ''c'' prefix:
+<code visualfoxpro>cChar := c'a'</code>
+Please note that there is a major difference between C# and X#: in C# all strings are enhanced, and to make them normal, you must prefix them with the ''@'' character.
+In X# all strings are normal, and to be enhanced, they need the ''e'' prefix.