語言

Uri.IsHexDigit(Char) 方法

定義

命名空間:
System
組件:
netstandard.dll, System.Runtime.dll
組件:
System.Runtime.dll
組件:
System.dll
組件:
netstandard.dll
來源:
Uri.cs
來源:
Uri.cs
來源:
Uri.cs
來源:
Uri.cs
來源:
Uri.cs

判斷指定字元是否為有效的十六進位數字。

public:
 static bool IsHexDigit(char character);
public static bool IsHexDigit(char character);
static member IsHexDigit : char -> bool
Public Shared Function IsHexDigit (character As Char) As Boolean

參數

character
Char

那個值得肯定的角色。

傳回

Boolean

true如果該字元是有效的十六進位數字;否則，。 false

範例

以下範例判斷字元是否為十六進位字元，若是，則將相應的十進位值寫入主控台。

char  testChar = 'e';
if (Uri.IsHexDigit(testChar))
    Console.WriteLine("'{0}' is the hexadecimal representation of {1}", testChar, Uri.FromHex(testChar));
else
    Console.WriteLine("'{0}' is not a hexadecimal character", testChar);

string returnString = Uri.HexEscape(testChar);
Console.WriteLine("The hexadecimal value of '{0}' is {1}", testChar, returnString);

let testChar = 'e'
if Uri.IsHexDigit testChar then
    printfn $"'{testChar}' is the hexadecimal representation of {Uri.FromHex testChar}"
else
    printfn $"'{testChar}' is not a hexadecimal character"

let returnString = Uri.HexEscape testChar
printfn $"The hexadecimal value of '{testChar}' is {returnString}"

Dim testChar As Char = "e"c
If Uri.IsHexDigit(testChar) = True Then
    Console.WriteLine("'{0}' is the hexadecimal representation of {1}", testChar, Uri.FromHex(testChar))
Else
    Console.WriteLine("'{0}' is not a hexadecimal character", testChar)
End If 
Dim returnString As String = Uri.HexEscape(testChar)
Console.WriteLine("The hexadecimal value of '{0}' is {1}", testChar, returnString)

備註

十六進位數字為0至9及字母A-F或a-f。

適用於