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C# Convert.ToBoolean(String, IFormatProvider)用法及代码示例


此方法用于使用指定的区域性特定格式信息将逻辑值的指定字符串表示形式转换为其等效的布尔值。

用法:

public static bool ToBoolean (string value, IFormatProvider provider);

参数:


  • value:它是一个字符串,其中包含TrueString或FalseString的值。
  • provider:它是提供区域性特定格式信息的对象。该参数被忽略。

返回值:如果值等于TrueString,则此方法返回true;如果值等于FalseString或null,则返回false。

异常:如果该值不等于TrueString或FalseString,则此方法将引发FormatException。

以下示例程序旨在说明Convert.ToBoolean(String,IFormatProvider)方法的用法:

范例1:

// C# program to demonstrate the 
// Convert.ToBoolean() Method 
using System; 
using System.Globalization; 
  
class GFG { 
  
// Main Method 
public static void Main() 
{ 
    try { 
          
        // creating object of CultureInfo 
        CultureInfo cultures = new CultureInfo("en-US"); 
  
        // declaring and intializing String array 
        String[] values = { null, "true",  
                    "False", " false " }; 
  
        // calling get() Method 
        Console.WriteLine("Converted bool value "+ 
                        "of specified strings:"); 
                          
        for (int j = 0; j < values.Length; j++) { 
            get(values[j], cultures); 
        } 
    } 
  
    catch (FormatException e) { 
  
        Console.Write("Exception Thrown:"); 
        Console.Write("{0}", e.GetType(), e.Message); 
    } 
} 
  
// Defining get() method 
public static void get(string s, CultureInfo cultures) 
{ 
  
    // converting string to specified bool 
    bool val = Convert.ToBoolean(s, cultures); 
  
    // display the converted string 
    Console.Write(" {0}, ", val); 
} 
}
输出:
Converted bool value of specified strings:
 False,  True,  False,  False,

范例2:对于FormatException

// C# program to demonstrate the 
// Convert.ToBoolean() Method 
using System; 
using System.Globalization; 
class GFG { 
  
// Main Method 
public static void Main() 
{ 
    try { 
          
        // creating object of CultureInfo 
        CultureInfo cultures = new CultureInfo("en-US"); 
  
        // declaring and intializing String array 
        String[] values = { null, "true",  
                "False", " false ", "" }; 
  
        // calling get() Method 
        Console.WriteLine("Converted bool value"+ 
                      " of specified strings:"); 
                        
        for (int j = 0; j < values.Length; j++) { 
            get(values[j], cultures); 
        } 
    } 
  
    catch (FormatException e) { 
        Console.WriteLine("\n"); 
        Console.Write("Exception Thrown:"); 
        Console.Write("{0}", e.GetType(), e.Message); 
    } 
} 
  
// Defining get() method 
public static void get(string s, CultureInfo cultures) 
{ 
  
    // converting string to specified bool 
    bool val = Convert.ToBoolean(s, cultures); 
  
    // display the converted string 
    Console.Write(" {0}, ", val); 
} 
}
输出:
Converted bool value of specified strings:
 False,  True,  False,  False, 

Exception Thrown:System.FormatException

参考:



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注:本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 C# | Convert.ToBoolean(String, IFormatProvider) Method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。