String.ToUpper String.ToUpper String.ToUpper String.ToUpper Method

定義

傳回此字串轉換為大寫的版本。Returns a copy of this string converted to uppercase.

多載

ToUpper(CultureInfo) ToUpper(CultureInfo) ToUpper(CultureInfo) ToUpper(CultureInfo)

使用指定之文化特性的大小寫規則,傳回這個字串轉換成大寫的複本。Returns a copy of this string converted to uppercase, using the casing rules of the specified culture.

ToUpper() ToUpper() ToUpper() ToUpper()

傳回此字串轉換為大寫的版本。Returns a copy of this string converted to uppercase.

ToUpper(CultureInfo) ToUpper(CultureInfo) ToUpper(CultureInfo) ToUpper(CultureInfo)

使用指定之文化特性的大小寫規則,傳回這個字串轉換成大寫的複本。Returns a copy of this string converted to uppercase, using the casing rules of the specified culture.

public:
 System::String ^ ToUpper(System::Globalization::CultureInfo ^ culture);
public string ToUpper (System.Globalization.CultureInfo culture);
member this.ToUpper : System.Globalization.CultureInfo -> string
Public Function ToUpper (culture As CultureInfo) As String

參數

culture
CultureInfo CultureInfo CultureInfo CultureInfo

提供文化特性大小寫規則的物件。An object that supplies culture-specific casing rules.

傳回

目前字串的大寫對應項。The uppercase equivalent of the current string.

例外狀況

範例

下列範例會將小寫字元的字串轉換成大寫字元,使用英文-美國及土耳其文的文化特性的兩個字串,然後比較大寫的字串。The following example converts a string of lowercase characters to two strings of uppercase characters using the English-United States and Turkish-Turkey cultures, then compares the uppercase strings. 大寫的字串完全相同,不同之處在於 Unicode LATIN CAPITAL LETTER 我在一個字串中的每個項目,另一個字串包含 LATIN CAPITAL LETTER I 與點上方。The uppercase strings are identical except that for each occurrence of the Unicode LATIN CAPITAL LETTER I in one string, the other string contains LATIN CAPITAL LETTER I WITH DOT ABOVE.

using System;
using System.Globalization;

class Example 
{
    public static void Main() 
    {
       string str1 = "indigo";
       string str2, str3;
   
       // str2 is an uppercase copy of str1, using English-United States culture.
       str2 = str1.ToUpper(new CultureInfo("en-US", false));
   
       // str3 is an uppercase copy of str1, using Turkish-Turkey culture.
       str3 = str1.ToUpper(new CultureInfo("tr-TR", false));
   
       // Compare the code points and compare the uppercase strings.
       ShowCodePoints("str1", str1);
       ShowCodePoints("str2", str2);
       ShowCodePoints("str3", str3);
       Console.WriteLine("str2 is {0} to str3.", 
            String.CompareOrdinal(str2, str3) == 0 ? "equal" : "not equal");
    }

    public static void ShowCodePoints(string varName, string s)
    {
       Console.Write("{0} = {1}: ", varName, s);
       foreach (ushort u in s)
         Console.Write("{0:x4} ", u);
       Console.WriteLine();
    }
}
// This example displays the following output:
//       str1 = indigo: 0069 006e 0064 0069 0067 006f
//       str2 = INDIGO: 0049 004e 0044 0049 0047 004f
//       str3 = INDIGO: 0130 004e 0044 0130 0047 004f
//       str2 is not equal to str3.
Imports System.Globalization

Public Module Example
   Public Sub Main()
      Dim str1 As String = "indigo"
      Dim str2, str3 As String
      
      ' str2 is an uppercase copy of str1, using English-United States culture.
      str2 = str1.ToUpper(New CultureInfo("en-US", False))
      
      ' str3 is an uppercase copy of str1, using Turkish-Turkey culture.
      str3 = str1.ToUpper(New CultureInfo("tr-TR", False))
      
      ' Compare the code points and compare the uppercase strings.
      ShowCodePoints("str1", str1)
      ShowCodePoints("str2", str2)
      ShowCodePoints("str3", str3)
      Console.WriteLine("str2 is {0} to str3.", _
                        IIf(String.CompareOrdinal(str2, str3) = 0, "equal", "not equal"))
   End Sub
   
   Public Sub ShowCodePoints(varName As String, s As String)
      Console.Write("{0} = {1}: ", varName, s)
      For Each c In s
         Console.Write("{0:X4} ", AscW(c))
      Next
      Console.WriteLine() 
   End Sub 
End Module
' The example displays the following output:
'       str1 = indigo: 0069 006E 0064 0069 0067 006F
'       str2 = INDIGO: 0049 004E 0044 0049 0047 004F
'       str3 = İNDİGO: 0130 004E 0044 0130 0047 004F
'       str2 is not equal to str3.

備註

指定的文化特性的大小寫規則culture參數可讓您判斷變更的字串大小寫的方式。The casing rules of the culture specified by the culture parameter determine the way the case of a string is changed.

注意

這個方法不會修改目前的執行個體的值。This method does not modify the value of the current instance. 相反地,它會傳回目前的執行個體中的所有字元都轉換成大寫的新字串。Instead, it returns a new string in which all characters in the current instance are converted to uppercase.

安全性考量Security Considerations

如果您傳遞ToUpper(CultureInfo)方法CultureInfo以外的其他物件CultureInfo.InvariantCulture,大小寫作業將會納入考量的特定文化特性的規則。If you pass the ToUpper(CultureInfo) method a CultureInfo object other than CultureInfo.InvariantCulture, the casing operation will take culture-specific rules into account. 如果您需要大寫或小寫版本的作業系統識別項,例如檔案名稱,具名管道或登錄機碼,使用ToLowerInvariantToUpperInvariant方法。If you need the lowercase or uppercase version of an operating system identifier, such as a file name, named pipe, or registry key, use the ToLowerInvariant or ToUpperInvariant method. 這樣會產生每個文化特性相同的結果,並更有效率地執行。This produces the same result in every culture and performs more efficiently.

另請參閱

ToUpper() ToUpper() ToUpper() ToUpper()

傳回此字串轉換為大寫的版本。Returns a copy of this string converted to uppercase.

public:
 System::String ^ ToUpper();
public string ToUpper ();
member this.ToUpper : unit -> string
Public Function ToUpper () As String

傳回

目前字串的大寫對應項。The uppercase equivalent of the current string.

範例

下列範例會呼叫ToUpper方法,將一系列的單字元字串包含基本拉丁、 拉丁文 1 補充和拉丁文擴充-A 字元集中的每個字元的轉換。The following example calls the ToUpper method to convert a series of one-character strings that contain each character in the Basic Latin, Latin-1 Supplement, and Latin Extended-A character sets. 然後,它會顯示每個字串,其大寫的字元是不同於其小寫的字元。It then displays each string whose uppercase character is different from its lowercase character.

using namespace System;

void main()
{
   int n = 0;
   for (int ctr = 0x20; ctr <= 0x017F; ctr++) {
      String^ string1 = Convert::ToChar(ctr).ToString();
      String^ upperString = string1->ToUpper();
      if (string1 != upperString) {
         Console::Write(L"{0} (\u+{1}) --> {2} (\u+{3})         ",
                       string1, 
                       Convert::ToUInt16(string1[0]).ToString("X4"),
                       upperString, 
                       Convert::ToUInt16(upperString[0]).ToString("X4"));
         n++;
         if (n % 2 == 0) Console::WriteLine();
      }
   } 
}
// The example displays the following output:
//    a (\u+0061) --> A (\u+0041)         b (\u+0062) --> B (\u+0042)
//    c (\u+0063) --> C (\u+0043)         d (\u+0064) --> D (\u+0044)
//    e (\u+0065) --> E (\u+0045)         f (\u+0066) --> F (\u+0046)
//    g (\u+0067) --> G (\u+0047)         h (\u+0068) --> H (\u+0048)
//    i (\u+0069) --> I (\u+0049)         j (\u+006A) --> J (\u+004A)
//    k (\u+006B) --> K (\u+004B)         l (\u+006C) --> L (\u+004C)
//    m (\u+006D) --> M (\u+004D)         n (\u+006E) --> N (\u+004E)
//    o (\u+006F) --> O (\u+004F)         p (\u+0070) --> P (\u+0050)
//    q (\u+0071) --> Q (\u+0051)         r (\u+0072) --> R (\u+0052)
//    s (\u+0073) --> S (\u+0053)         t (\u+0074) --> T (\u+0054)
//    u (\u+0075) --> U (\u+0055)         v (\u+0076) --> V (\u+0056)
//    w (\u+0077) --> W (\u+0057)         x (\u+0078) --> X (\u+0058)
//    y (\u+0079) --> Y (\u+0059)         z (\u+007A) --> Z (\u+005A)
//    à (\u+00E0) --> À (\u+00C0)         á (\u+00E1) --> Á (\u+00C1)
//    â (\u+00E2) --> Â (\u+00C2)         ã (\u+00E3) --> Ã (\u+00C3)
//    ä (\u+00E4) --> Ä (\u+00C4)         å (\u+00E5) --> Å (\u+00C5)
//    æ (\u+00E6) --> Æ (\u+00C6)         ç (\u+00E7) --> Ç (\u+00C7)
//    è (\u+00E8) --> È (\u+00C8)         é (\u+00E9) --> É (\u+00C9)
//    ê (\u+00EA) --> Ê (\u+00CA)         ë (\u+00EB) --> Ë (\u+00CB)
//    ì (\u+00EC) --> Ì (\u+00CC)         í (\u+00ED) --> Í (\u+00CD)
//    î (\u+00EE) --> Î (\u+00CE)         ï (\u+00EF) --> Ï (\u+00CF)
//    ð (\u+00F0) --> Ð (\u+00D0)         ñ (\u+00F1) --> Ñ (\u+00D1)
//    ò (\u+00F2) --> Ò (\u+00D2)         ó (\u+00F3) --> Ó (\u+00D3)
//    ô (\u+00F4) --> Ô (\u+00D4)         õ (\u+00F5) --> Õ (\u+00D5)
//    ö (\u+00F6) --> Ö (\u+00D6)         ø (\u+00F8) --> Ø (\u+00D8)
//    ù (\u+00F9) --> Ù (\u+00D9)         ú (\u+00FA) --> Ú (\u+00DA)
//    û (\u+00FB) --> Û (\u+00DB)         ü (\u+00FC) --> Ü (\u+00DC)
//    ý (\u+00FD) --> Ý (\u+00DD)         þ (\u+00FE) --> Þ (\u+00DE)
//    ÿ (\u+00FF) --> Ÿ (\u+0178)         ā (\u+0101) --> Ā (\u+0100)
//    ă (\u+0103) --> Ă (\u+0102)         ą (\u+0105) --> Ą (\u+0104)
//    ć (\u+0107) --> Ć (\u+0106)         ĉ (\u+0109) --> Ĉ (\u+0108)
//    ċ (\u+010B) --> Ċ (\u+010A)         č (\u+010D) --> Č (\u+010C)
//    ď (\u+010F) --> Ď (\u+010E)         đ (\u+0111) --> Đ (\u+0110)
//    ē (\u+0113) --> Ē (\u+0112)         ĕ (\u+0115) --> Ĕ (\u+0114)
//    ė (\u+0117) --> Ė (\u+0116)         ę (\u+0119) --> Ę (\u+0118)
//    ě (\u+011B) --> Ě (\u+011A)         ĝ (\u+011D) --> Ĝ (\u+011C)
//    ğ (\u+011F) --> Ğ (\u+011E)         ġ (\u+0121) --> Ġ (\u+0120)
//    ģ (\u+0123) --> Ģ (\u+0122)         ĥ (\u+0125) --> Ĥ (\u+0124)
//    ħ (\u+0127) --> Ħ (\u+0126)         ĩ (\u+0129) --> Ĩ (\u+0128)
//    ī (\u+012B) --> Ī (\u+012A)         ĭ (\u+012D) --> Ĭ (\u+012C)
//    į (\u+012F) --> Į (\u+012E)         ı (\u+0131) --> I (\u+0049)
//    ij (\u+0133) --> IJ (\u+0132)         ĵ (\u+0135) --> Ĵ (\u+0134)
//    ķ (\u+0137) --> Ķ (\u+0136)         ĺ (\u+013A) --> Ĺ (\u+0139)
//    ļ (\u+013C) --> Ļ (\u+013B)         ľ (\u+013E) --> Ľ (\u+013D)
//    ŀ (\u+0140) --> Ŀ (\u+013F)         ł (\u+0142) --> Ł (\u+0141)
//    ń (\u+0144) --> Ń (\u+0143)         ņ (\u+0146) --> Ņ (\u+0145)
//    ň (\u+0148) --> Ň (\u+0147)         ŋ (\u+014B) --> Ŋ (\u+014A)
//    ō (\u+014D) --> Ō (\u+014C)         ŏ (\u+014F) --> Ŏ (\u+014E)
//    ő (\u+0151) --> Ő (\u+0150)         œ (\u+0153) --> Œ (\u+0152)
//    ŕ (\u+0155) --> Ŕ (\u+0154)         ŗ (\u+0157) --> Ŗ (\u+0156)
//    ř (\u+0159) --> Ř (\u+0158)         ś (\u+015B) --> Ś (\u+015A)
//    ŝ (\u+015D) --> Ŝ (\u+015C)         ş (\u+015F) --> Ş (\u+015E)
//    š (\u+0161) --> Š (\u+0160)         ţ (\u+0163) --> Ţ (\u+0162)
//    ť (\u+0165) --> Ť (\u+0164)         ŧ (\u+0167) --> Ŧ (\u+0166)
//    ũ (\u+0169) --> Ũ (\u+0168)         ū (\u+016B) --> Ū (\u+016A)
//    ŭ (\u+016D) --> Ŭ (\u+016C)         ů (\u+016F) --> Ů (\u+016E)
//    ű (\u+0171) --> Ű (\u+0170)         ų (\u+0173) --> Ų (\u+0172)
//    ŵ (\u+0175) --> Ŵ (\u+0174)         ŷ (\u+0177) --> Ŷ (\u+0176)
//    ź (\u+017A) --> Ź (\u+0179)         ż (\u+017C) --> Ż (\u+017B)
//    ž (\u+017E) --> Ž (\u+017D)
using System;

public class Example
{
   public static void Main()
   {
      int n = 0;
      for (int ctr = 0x20; ctr <= 0x017F; ctr++) {
         string string1 = Convert.ToChar(ctr).ToString();
         string upperString = string1.ToUpper();
         if (string1 != upperString) {
            Console.Write(@"{0} (\u+{1}) --> {2} (\u+{3})         ", 
                          string1, 
                          Convert.ToUInt16(string1[0]).ToString("X4"),  
                          upperString, 
                          Convert.ToUInt16(upperString[0]).ToString("X4"));                     
            n++;
            if (n % 2 == 0) Console.WriteLine();
         }
      } 
   }
}
// The example displays the following output:
//    a (\u+0061) --> A (\u+0041)         b (\u+0062) --> B (\u+0042)
//    c (\u+0063) --> C (\u+0043)         d (\u+0064) --> D (\u+0044)
//    e (\u+0065) --> E (\u+0045)         f (\u+0066) --> F (\u+0046)
//    g (\u+0067) --> G (\u+0047)         h (\u+0068) --> H (\u+0048)
//    i (\u+0069) --> I (\u+0049)         j (\u+006A) --> J (\u+004A)
//    k (\u+006B) --> K (\u+004B)         l (\u+006C) --> L (\u+004C)
//    m (\u+006D) --> M (\u+004D)         n (\u+006E) --> N (\u+004E)
//    o (\u+006F) --> O (\u+004F)         p (\u+0070) --> P (\u+0050)
//    q (\u+0071) --> Q (\u+0051)         r (\u+0072) --> R (\u+0052)
//    s (\u+0073) --> S (\u+0053)         t (\u+0074) --> T (\u+0054)
//    u (\u+0075) --> U (\u+0055)         v (\u+0076) --> V (\u+0056)
//    w (\u+0077) --> W (\u+0057)         x (\u+0078) --> X (\u+0058)
//    y (\u+0079) --> Y (\u+0059)         z (\u+007A) --> Z (\u+005A)
//    à (\u+00E0) --> À (\u+00C0)         á (\u+00E1) --> Á (\u+00C1)
//    â (\u+00E2) --> Â (\u+00C2)         ã (\u+00E3) --> Ã (\u+00C3)
//    ä (\u+00E4) --> Ä (\u+00C4)         å (\u+00E5) --> Å (\u+00C5)
//    æ (\u+00E6) --> Æ (\u+00C6)         ç (\u+00E7) --> Ç (\u+00C7)
//    è (\u+00E8) --> È (\u+00C8)         é (\u+00E9) --> É (\u+00C9)
//    ê (\u+00EA) --> Ê (\u+00CA)         ë (\u+00EB) --> Ë (\u+00CB)
//    ì (\u+00EC) --> Ì (\u+00CC)         í (\u+00ED) --> Í (\u+00CD)
//    î (\u+00EE) --> Î (\u+00CE)         ï (\u+00EF) --> Ï (\u+00CF)
//    ð (\u+00F0) --> Ð (\u+00D0)         ñ (\u+00F1) --> Ñ (\u+00D1)
//    ò (\u+00F2) --> Ò (\u+00D2)         ó (\u+00F3) --> Ó (\u+00D3)
//    ô (\u+00F4) --> Ô (\u+00D4)         õ (\u+00F5) --> Õ (\u+00D5)
//    ö (\u+00F6) --> Ö (\u+00D6)         ø (\u+00F8) --> Ø (\u+00D8)
//    ù (\u+00F9) --> Ù (\u+00D9)         ú (\u+00FA) --> Ú (\u+00DA)
//    û (\u+00FB) --> Û (\u+00DB)         ü (\u+00FC) --> Ü (\u+00DC)
//    ý (\u+00FD) --> Ý (\u+00DD)         þ (\u+00FE) --> Þ (\u+00DE)
//    ÿ (\u+00FF) --> Ÿ (\u+0178)         ā (\u+0101) --> Ā (\u+0100)
//    ă (\u+0103) --> Ă (\u+0102)         ą (\u+0105) --> Ą (\u+0104)
//    ć (\u+0107) --> Ć (\u+0106)         ĉ (\u+0109) --> Ĉ (\u+0108)
//    ċ (\u+010B) --> Ċ (\u+010A)         č (\u+010D) --> Č (\u+010C)
//    ď (\u+010F) --> Ď (\u+010E)         đ (\u+0111) --> Đ (\u+0110)
//    ē (\u+0113) --> Ē (\u+0112)         ĕ (\u+0115) --> Ĕ (\u+0114)
//    ė (\u+0117) --> Ė (\u+0116)         ę (\u+0119) --> Ę (\u+0118)
//    ě (\u+011B) --> Ě (\u+011A)         ĝ (\u+011D) --> Ĝ (\u+011C)
//    ğ (\u+011F) --> Ğ (\u+011E)         ġ (\u+0121) --> Ġ (\u+0120)
//    ģ (\u+0123) --> Ģ (\u+0122)         ĥ (\u+0125) --> Ĥ (\u+0124)
//    ħ (\u+0127) --> Ħ (\u+0126)         ĩ (\u+0129) --> Ĩ (\u+0128)
//    ī (\u+012B) --> Ī (\u+012A)         ĭ (\u+012D) --> Ĭ (\u+012C)
//    į (\u+012F) --> Į (\u+012E)         ı (\u+0131) --> I (\u+0049)
//    ij (\u+0133) --> IJ (\u+0132)         ĵ (\u+0135) --> Ĵ (\u+0134)
//    ķ (\u+0137) --> Ķ (\u+0136)         ĺ (\u+013A) --> Ĺ (\u+0139)
//    ļ (\u+013C) --> Ļ (\u+013B)         ľ (\u+013E) --> Ľ (\u+013D)
//    ŀ (\u+0140) --> Ŀ (\u+013F)         ł (\u+0142) --> Ł (\u+0141)
//    ń (\u+0144) --> Ń (\u+0143)         ņ (\u+0146) --> Ņ (\u+0145)
//    ň (\u+0148) --> Ň (\u+0147)         ŋ (\u+014B) --> Ŋ (\u+014A)
//    ō (\u+014D) --> Ō (\u+014C)         ŏ (\u+014F) --> Ŏ (\u+014E)
//    ő (\u+0151) --> Ő (\u+0150)         œ (\u+0153) --> Œ (\u+0152)
//    ŕ (\u+0155) --> Ŕ (\u+0154)         ŗ (\u+0157) --> Ŗ (\u+0156)
//    ř (\u+0159) --> Ř (\u+0158)         ś (\u+015B) --> Ś (\u+015A)
//    ŝ (\u+015D) --> Ŝ (\u+015C)         ş (\u+015F) --> Ş (\u+015E)
//    š (\u+0161) --> Š (\u+0160)         ţ (\u+0163) --> Ţ (\u+0162)
//    ť (\u+0165) --> Ť (\u+0164)         ŧ (\u+0167) --> Ŧ (\u+0166)
//    ũ (\u+0169) --> Ũ (\u+0168)         ū (\u+016B) --> Ū (\u+016A)
//    ŭ (\u+016D) --> Ŭ (\u+016C)         ů (\u+016F) --> Ů (\u+016E)
//    ű (\u+0171) --> Ű (\u+0170)         ų (\u+0173) --> Ų (\u+0172)
//    ŵ (\u+0175) --> Ŵ (\u+0174)         ŷ (\u+0177) --> Ŷ (\u+0176)
//    ź (\u+017A) --> Ź (\u+0179)         ż (\u+017C) --> Ż (\u+017B)
//    ž (\u+017E) --> Ž (\u+017D)
Module Example
   Public Sub Main()
      Dim n As Integer = 0
      For ctr As Integer = &h20 To &h017F
         Dim string1 As String = ChrW(ctr).ToString()
         Dim upperString As String = string1.ToUpper()
         If string1 <> upperString Then
            Console.Write("{0} (\u+{1}) --> {2} (\u+{3})         ", _
                          string1, _
                          Convert.ToUInt16(string1.Chars(0)).ToString("X4"), _ 
                          upperString, _
                          Convert.ToUInt16(upperString.Chars(0)).ToString("X4"))                     
            n += 1
            If n Mod 2 = 0 Then Console.WriteLine()
         End If
      Next 
   End Sub
End Module
' The example displays the following output:
'    a (\u+0061) --> A (\u+0041)         b (\u+0062) --> B (\u+0042)
'    c (\u+0063) --> C (\u+0043)         d (\u+0064) --> D (\u+0044)
'    e (\u+0065) --> E (\u+0045)         f (\u+0066) --> F (\u+0046)
'    g (\u+0067) --> G (\u+0047)         h (\u+0068) --> H (\u+0048)
'    i (\u+0069) --> I (\u+0049)         j (\u+006A) --> J (\u+004A)
'    k (\u+006B) --> K (\u+004B)         l (\u+006C) --> L (\u+004C)
'    m (\u+006D) --> M (\u+004D)         n (\u+006E) --> N (\u+004E)
'    o (\u+006F) --> O (\u+004F)         p (\u+0070) --> P (\u+0050)
'    q (\u+0071) --> Q (\u+0051)         r (\u+0072) --> R (\u+0052)
'    s (\u+0073) --> S (\u+0053)         t (\u+0074) --> T (\u+0054)
'    u (\u+0075) --> U (\u+0055)         v (\u+0076) --> V (\u+0056)
'    w (\u+0077) --> W (\u+0057)         x (\u+0078) --> X (\u+0058)
'    y (\u+0079) --> Y (\u+0059)         z (\u+007A) --> Z (\u+005A)
'    à (\u+00E0) --> À (\u+00C0)         á (\u+00E1) --> Á (\u+00C1)
'    â (\u+00E2) --> Â (\u+00C2)         ã (\u+00E3) --> Ã (\u+00C3)
'    ä (\u+00E4) --> Ä (\u+00C4)         å (\u+00E5) --> Å (\u+00C5)
'    æ (\u+00E6) --> Æ (\u+00C6)         ç (\u+00E7) --> Ç (\u+00C7)
'    è (\u+00E8) --> È (\u+00C8)         é (\u+00E9) --> É (\u+00C9)
'    ê (\u+00EA) --> Ê (\u+00CA)         ë (\u+00EB) --> Ë (\u+00CB)
'    ì (\u+00EC) --> Ì (\u+00CC)         í (\u+00ED) --> Í (\u+00CD)
'    î (\u+00EE) --> Î (\u+00CE)         ï (\u+00EF) --> Ï (\u+00CF)
'    ð (\u+00F0) --> Ð (\u+00D0)         ñ (\u+00F1) --> Ñ (\u+00D1)
'    ò (\u+00F2) --> Ò (\u+00D2)         ó (\u+00F3) --> Ó (\u+00D3)
'    ô (\u+00F4) --> Ô (\u+00D4)         õ (\u+00F5) --> Õ (\u+00D5)
'    ö (\u+00F6) --> Ö (\u+00D6)         ø (\u+00F8) --> Ø (\u+00D8)
'    ù (\u+00F9) --> Ù (\u+00D9)         ú (\u+00FA) --> Ú (\u+00DA)
'    û (\u+00FB) --> Û (\u+00DB)         ü (\u+00FC) --> Ü (\u+00DC)
'    ý (\u+00FD) --> Ý (\u+00DD)         þ (\u+00FE) --> Þ (\u+00DE)
'    ÿ (\u+00FF) --> Ÿ (\u+0178)         ā (\u+0101) --> Ā (\u+0100)
'    ă (\u+0103) --> Ă (\u+0102)         ą (\u+0105) --> Ą (\u+0104)
'    ć (\u+0107) --> Ć (\u+0106)         ĉ (\u+0109) --> Ĉ (\u+0108)
'    ċ (\u+010B) --> Ċ (\u+010A)         č (\u+010D) --> Č (\u+010C)
'    ď (\u+010F) --> Ď (\u+010E)         đ (\u+0111) --> Đ (\u+0110)
'    ē (\u+0113) --> Ē (\u+0112)         ĕ (\u+0115) --> Ĕ (\u+0114)
'    ė (\u+0117) --> Ė (\u+0116)         ę (\u+0119) --> Ę (\u+0118)
'    ě (\u+011B) --> Ě (\u+011A)         ĝ (\u+011D) --> Ĝ (\u+011C)
'    ğ (\u+011F) --> Ğ (\u+011E)         ġ (\u+0121) --> Ġ (\u+0120)
'    ģ (\u+0123) --> Ģ (\u+0122)         ĥ (\u+0125) --> Ĥ (\u+0124)
'    ħ (\u+0127) --> Ħ (\u+0126)         ĩ (\u+0129) --> Ĩ (\u+0128)
'    ī (\u+012B) --> Ī (\u+012A)         ĭ (\u+012D) --> Ĭ (\u+012C)
'    į (\u+012F) --> Į (\u+012E)         ı (\u+0131) --> I (\u+0049)
'    ij (\u+0133) --> IJ (\u+0132)         ĵ (\u+0135) --> Ĵ (\u+0134)
'    ķ (\u+0137) --> Ķ (\u+0136)         ĺ (\u+013A) --> Ĺ (\u+0139)
'    ļ (\u+013C) --> Ļ (\u+013B)         ľ (\u+013E) --> Ľ (\u+013D)
'    ŀ (\u+0140) --> Ŀ (\u+013F)         ł (\u+0142) --> Ł (\u+0141)
'    ń (\u+0144) --> Ń (\u+0143)         ņ (\u+0146) --> Ņ (\u+0145)
'    ň (\u+0148) --> Ň (\u+0147)         ŋ (\u+014B) --> Ŋ (\u+014A)
'    ō (\u+014D) --> Ō (\u+014C)         ŏ (\u+014F) --> Ŏ (\u+014E)
'    ő (\u+0151) --> Ő (\u+0150)         œ (\u+0153) --> Œ (\u+0152)
'    ŕ (\u+0155) --> Ŕ (\u+0154)         ŗ (\u+0157) --> Ŗ (\u+0156)
'    ř (\u+0159) --> Ř (\u+0158)         ś (\u+015B) --> Ś (\u+015A)
'    ŝ (\u+015D) --> Ŝ (\u+015C)         ş (\u+015F) --> Ş (\u+015E)
'    š (\u+0161) --> Š (\u+0160)         ţ (\u+0163) --> Ţ (\u+0162)
'    ť (\u+0165) --> Ť (\u+0164)         ŧ (\u+0167) --> Ŧ (\u+0166)
'    ũ (\u+0169) --> Ũ (\u+0168)         ū (\u+016B) --> Ū (\u+016A)
'    ŭ (\u+016D) --> Ŭ (\u+016C)         ů (\u+016F) --> Ů (\u+016E)
'    ű (\u+0171) --> Ű (\u+0170)         ų (\u+0173) --> Ų (\u+0172)
'    ŵ (\u+0175) --> Ŵ (\u+0174)         ŷ (\u+0177) --> Ŷ (\u+0176)
'    ź (\u+017A) --> Ź (\u+0179)         ż (\u+017C) --> Ż (\u+017B)
'    ž (\u+017E) --> Ž (\u+017D)

備註

此方法會使用目前文化特性的大小寫規則,將目前的執行個體中的每個字元轉換成其對等大寫。This method uses the casing rules of the current culture to convert each character in the current instance to its uppercase equivalent. 如果字元沒有對等大寫,它會原封不動包含在傳回的字串。If a character does not have an uppercase equivalent, it is included unchanged in the returned string.

注意

這個方法不會修改目前的執行個體的值。This method does not modify the value of the current instance. 相反地,它會傳回目前的執行個體中的所有字元都轉換成大寫的新字串。Instead, it returns a new string in which all characters in the current instance are converted to uppercase.

ToUpper方法通常用來將字串轉換成大寫,這樣就可以使用不區分大小寫的比較。The ToUpper method is often used to convert a string to uppercase so that it can be used in a case-insensitive comparison. 更好的方法,以執行不區分大小寫的比較是呼叫字串比較方法具有StringComparison參數設為其值StringComparison.CurrentCultureIgnoreCase進行區分文化特性、 不區分大小寫的比較。A better method to perform case-insensitive comparison is to call a string comparison method that has a StringComparison parameter whose value you set to StringComparison.CurrentCultureIgnoreCase for a culture-sensitive, case-insensitive comparison.

安全性考量Security Considerations

呼叫結果大小寫作業ToUpper()方法會將目前的文化特性的大小寫慣例列入考量。The casing operation that results from calling the ToUpper() method takes the casing conventions of the current culture into account. 如果您需要大寫或小寫版本的作業系統識別項,例如檔案名稱,具名管道或登錄機碼,使用ToLowerInvariantToUpperInvariant方法。If you need the lowercase or uppercase version of an operating system identifier, such as a file name, named pipe, or registry key, use the ToLowerInvariant or ToUpperInvariant method. 這會產生每個文化特性相同的結果 (不同於ToUpper()方法),並更有效率地執行。This produces the same result in every culture (unlike the ToUpper() method) and performs more efficiently.

給呼叫者的注意事項

中所述使用字串的最佳做法,我們建議您避免呼叫字串大小寫方法,來替代預設值,並改為呼叫需要明確指定參數的方法。As explained in Best Practices for Using Strings, we recommend that you avoid calling string casing methods that substitute default values and instead call methods that require parameters to be explicitly specified. 若要將字串轉換為大寫使用目前文化特性的大小寫慣例,呼叫ToUpper(CultureInfo)的值的方法多載CurrentCulture針對其culture參數。To convert a string to uppercase by using the casing conventions of the current culture, call the ToUpper(CultureInfo) method overload with a value of CurrentCulture for its culture parameter.

另請參閱

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