作者：手机用户2602933827 | 来源：互联网 | 2023-10-11 13:30
C# | Char。解析(字符串)方法
原文:https://www . geesforgeks . org/c-sharp-char-parse string-method/
此方法用于将指定字符串的值转换为其等效的 Unicode 字符。
语法:
public static char Parse (string s);
这里， s 是包含单个字符的字符串，或者为空。
返回值:该方法返回一个 Unicode 字符，相当于 s 中的唯一字符。
异常:
参数空异常:如果的为空。
格式异常:如果 s 的长度不是 1。
以下程序说明了字符的使用。解析(字符串)方法:
例 1:
// C# program to demonstrate the
// Char.Parse(String) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling Parse() Method
get("1");
get("a");
get("@");
get("-");
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (FormatException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s)
{
// getting Unicode character
// using Parse() Method
char val = Char.Parse(s);
// display the char value
Console.WriteLine("Unicode character "+
"of string {0} is {1}", s, val);
}
}
Output:
Unicode character of string 1 is 1
Unicode character of string a is a
Unicode character of string @ is @
Unicode character of string - is -
示例 2: 适用于参数异常
// C# program to demonstrate the
// Char.Parse(String) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling Parse() Method
get("1");
get("a");
get("@");
get("-");
Console.WriteLine("");
Console.WriteLine("s is null");
get(null);
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (FormatException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s)
{
// getting Unicode character
// using Parse() Method
char val = Char.Parse(s);
// display the char value
Console.WriteLine("Unicode character of"+
" string {0} is {1}", s, val);
}
}
Output:
Unicode character of string 1 is 1
Unicode character of string a is a
Unicode character of string @ is @
Unicode character of string - is -
s is null
Exception Thrown: System.ArgumentNullException
例 3: 为格式异常
// C# program to demonstrate the
// Char.Parse(String) Method
using System;
class GFG {
// Main Method
public static void Main()
{
try {
// calling Parse() Method
get("1");
get("a");
get("@");
get("-");
Console.WriteLine("");
Console.WriteLine("The length of s is not 1.");
get("null");
}
catch (ArgumentNullException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
catch (FormatException e) {
Console.Write("Exception Thrown: ");
Console.Write("{0}", e.GetType(), e.Message);
}
}
// Defining get() method
public static void get(string s)
{
// getting Unicode character
// using Parse() Method
char val = Char.Parse(s);
// display the char value
Console.WriteLine("Unicode character of "+
"string {0} is {1}", s, val);
}
}
Output:
Unicode character of string 1 is 1
Unicode character of string a is a
Unicode character of string @ is @
Unicode character of string - is -
The length of s is not 1.
Exception Thrown: System.FormatException
参考:
- https://docs . Microsoft . com/en-us/dotnet/API/system . char . parse？视图=netframework-4.7.2
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