Uri.IsHexEncoding(String, Int32) 方法

定義

命名空間:

System

組件:

System.Runtime.dll

組件:

System.dll

組件:

netstandard.dll

判斷字串中的字元是否為十六進位編碼。

public:
 static bool IsHexEncoding(System::String ^ pattern, int index);

public static bool IsHexEncoding (string pattern, int index);

static member IsHexEncoding : string * int -> bool

Public Shared Function IsHexEncoding (pattern As String, index As Integer) As Boolean

參數

pattern

String

要檢查的字串。

index

Int32

pattern 中要檢查十六進位編碼的位置。

傳回

Boolean

如果 pattern 在指定的位置為十六進位編碼，則為 true；否則為 false。

範例

下列程式碼範例會判斷字元是否為十六進位編碼，如果是的話，會將對等字元寫入主控台。

String^ testString = "%75";
int index = 0;
if ( Uri::IsHexEncoding( testString, index ) )
{
   Console::WriteLine( "The character is {0}",
      Uri::HexUnescape( testString, index ) );
}
else
{
   Console::WriteLine( "The character is not hex encoded" );
}

string testString = "%75";
int index = 0;
if (Uri.IsHexEncoding(testString, index))
     Console.WriteLine("The character is {0}", Uri.HexUnescape(testString, ref index));
else
     Console.WriteLine("The character is not hexadecimal encoded");

let testString = "%75"
let mutable index = 0
if Uri.IsHexEncoding(testString, index) then
    printfn $"The character is {Uri.HexUnescape(testString, &index)}"
else
    printfn "The character is not hexadecimal encoded"

Dim testString As String = "%75"
Dim index As Integer = 0
If Uri.IsHexEncoding(testString, index) Then
    Console.WriteLine("The character is {0}", Uri.HexUnescape(testString, index))
Else
    Console.WriteLine("The character is not hexadecimal encoded")
End If

備註

方法 IsHexEncoding 會檢查字串中模式 「%hexhex」 的十六進位編碼，其中 「hex」 是 0 到 9 的數位，或是 A-F (不區分大小寫) 的字母。