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Most of the methods that do not rely on defaults include a parameter of type String Comparison, which is an enumeration that explicitly specifies rules for string comparison by culture and case. However, we still recommend that you call an overload that explicitly specifies the String Comparison type even if you want to perform an ordinal comparison; this makes it easier to search code for a certain string interpretation. If so, consider using a case-insensitive comparison. The change code is reflected in the lines labeled ' Correct.
The following table describes the String Comparison enumeration members. Dim stored Names() As String Public Sub Store Names(names() As String) Dim index As Integer = 0 Re Dim stored Names(names. End Sub Public Function Does Name Exist(name As String) As Boolean Return Array.
In general, we recommend that you call a method that does not rely on defaults, because it makes the intent of the code unambiguous. Invariant Culture)) End Sub Private Function Show Bytes(str As String) As String Dim hex String As String = String. Length - 1) For Each name As String In names Me.stored Names(index) = name index = 1 Next Array. Binary Search(Me.stored Names, name, String Comparer. Ordinal) If this data is persisted and moved across cultures, and sorting is used to present this data to the user, you might consider using String Comparison.
This, in turn, makes the code more readable and easier to debug and maintain. Invariant Culture, which operates linguistically for better user output but is unaffected by changes in culture. Parse(String, IFormat Provider), the persisted date and time data is successfully restored, as the following output shows.
The following example illustrates differences in sort order between the U. If you use the default overloads for string comparison routines, they will be subject to variance between cultures. Threading; public class Example // The example displays the following output: // Culture = English (United States) // (file == FILE) = True // // Culture = Turkish (Turkey) // (file == FILE) = False Imports System. Threading Module Example Public Sub Main() Dim file Url = "file" Thread. Current Culture = New Culture Info("en-US") Console.
Ordinal)); // The example displays the following output: // Comparing 'Aa' (00 41 00 61) and 'A a' (00 41 00 00 00 00 00 00 00 61): // With String. The results may look odd in most contexts if displayed to users. Equals overloads that do not include a String Comparison argument (including the equality operator). NET provides extensive support for developing localized and globalized applications, and makes it easy to apply the conventions of either the current culture or a specific culture when performing common operations such as sorting and displaying strings. Case-insensitive comparisons with the invariant culture use the static Compare Info property returned by the static Culture Info. The object makes the Compare method interpret certain sets of characters as equivalent. Last Index Of methods that include a Char parameter perform an ordinal comparison, but the default String. Last Index Of methods that include a String parameter perform a culture-sensitive comparison. The overloads that include a Char argument do not allow you to specify a String Comparison type.But sorting or comparing strings is not always a culture-sensitive operation. Invariant Culture property for comparison information as well. For example, the following equivalence is valid under the invariant culture: Invariant Culture: a ̊ = å The LATIN SMALL LETTER A character "a" (\u0061), when it is next to the COMBINING RING ABOVE character " " ̊" (\u030a), is interpreted as the LATIN SMALL LETTER A WITH RING ABOVE character "å" (\u00e5). Compare Info class, which is returned by the Culture Info. This method does not currently offer an overload that specifies a String Comparison type. There is a lack of consistency in how the default overloads of these methods perform comparisons. Back to top Some non-string methods that have string comparison as a central operation use the String Comparer type.However, evaluating two strings for equality or sort order does not yield a single, correct result; the outcome depends on the criteria used to compare the strings. Ordinal comparisons are string comparisons in which each byte of each string is compared without linguistic interpretation; for example, "windows" does not match "Windows". The example saves an array of date and time values to a file. Threading; public class Example // The example displays the following output: // Failed to parse 4/22/1870 PM // Failed to parse 2/18/1905 PM // // // // // // // Imports System. In particular, string comparisons that are ordinal or that are based on the casing and sorting conventions of the current culture or the invariant culture (a locale-agnostic culture based on the English language) may produce different results. Write Line() End Sub End Module ' The example displays the following output: ' Sorting using the en-US culture: ' able ' Æble ' ångström ' apple ' Visual Studio ' Windows ' ' Sorting using the sv-SE culture: ' able ' Æble ' apple ' Windows ' Visual Studio ' ångström Case-insensitive comparisons that use the current culture are the same as culture-sensitive comparisons, except that they ignore case as dictated by the thread's current culture. Current Culture = New Culture Info("tr-TR") Console. This is essentially a call to the C runtime function. The following example performs a culture-sensitive comparison of the string "Aa" with a similar string that contains several embedded null characters between "A" and "a", and shows how the two strings are considered equal. These are formatted by using the conventions of the English (United States) culture.
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If the culture is not set by the user, it defaults to the setting in the Regional Options window in Control Panel. This happens when an application executes on a computer that has a different culture than the computer on which the application was developed, or when the executing thread changes its culture. Threading; public class Example // The example displays the following output: // Sorting using the en-US culture: // able // Æble // ångström // apple // Visual Studio // Windows // // Sorting using the sv-SE culture: // able // Æble // apple // Windows // Visual Studio // ångström Imports System. Threading Module Example Public Sub Main() Dim values() As String = Array. This behavior occurs in the Azerbaijani ("az") culture as well.