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C# Convert.ToDateTime(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数字的指定字符串表示形式转换为等效的日期和时间。

用法:

public static DateTime ToDateTime (string value, IFormatProvider provider);

参数：


  • value：包含要转换的日期和时间的字符串。
  • provider：提供文化专用格式信息的对象。

返回值：此方法返回与value值等效的日期和时间，或者如果Min为null，则返回MinValue的日期和时间。

异常：如果该值不是正确格式的日期和时间字符串，则此方法将提供FormatException。

以下示例程序旨在说明Convert.ToDateTime(String，IFormatProvider)方法的使用

范例1：

// C# program to demonstrate the 
// Convert.ToDateTime() 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 = {"01/02/09", "2009/02/03", 
            "01/2009/03", "01/02/2009", "01/02/23"}; 
  
        // calling get() Method 
        Console.WriteLine("Converted string value"+ 
                       " to specified DateTime:"); 
                         
        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 
    DateTime val = Convert.ToDateTime(s, cultures); 
  
    // display the converted string 
    Console.Write(" {0}, ", val); 
} 
}
输出：

Converted string value to specified DateTime:
01/02/2009 00:00:00, 02/03/2009 00:00:00, 01/03/2009 00:00:00, 01/02/2009 00:00:00, 01/02/2023 00:00:00,

范例2：对于FormatException

// C# program to demonstrate the 
// Convert.ToDateTime() 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 = {"01/02/09", "2009/02/03",  
            "01/2009/03", "01/02/2009", "01/02/23"}; 
  
        // calling get() Method 
        Console.WriteLine("Converted string value "+ 
                         "to specified DateTime:"); 
                           
        for (int j = 0; j < values.Length; j++) { 
              
            get(values[j], cultures); 
        } 
        Console.WriteLine("\n\nvalue is not a properly "+ 
                      "formatted date and time string."); 
                        
        // converting string to specified bool 
        DateTime val = Convert.ToDateTime("21/2009/03", 
                                             cultures); 
  
        // display the converted string 
        Console.Write(" {0}, ", val); 
    } 
    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 
    DateTime val = Convert.ToDateTime(s, cultures); 
  
    // display the converted string 
    Console.Write(" {0}, ", val); 
} 
}
输出：

Converted string value to specified DateTime:
01/02/2009 00:00:00, 02/03/2009 00:00:00, 01/03/2009 00:00:00, 01/02/2009 00:00:00, 01/02/2023 00:00:00,

value is not a properly formatted date and time string.
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.ToDateTime(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。