C# Int64.TryParse方法代碼示例

本文整理匯總了C#中System.Int64.TryParse方法的典型用法代碼示例。如果您正苦於以下問題：C# Int64.TryParse方法的具體用法？C# Int64.TryParse怎麽用？C# Int64.TryParse使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類System.Int64的用法示例。

在下文中一共展示了Int64.TryParse方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。

示例1: Main

//引入命名空間
using System;

public class StringParsing
{
   public static void Main()
   {
      TryToParse(null);
      TryToParse("160519");
      TryToParse("9432.0");
      TryToParse("16,667");
      TryToParse("   -322   ");
      TryToParse("+4302");
      TryToParse("(100);");
      TryToParse("01FA");
   }

   private static void TryToParse(string value)
   {
      bool success = Int64.TryParse(value, out long number);
      if (success)
      {
         Console.WriteLine("Converted '{0}' to {1}.", value, number);         
      }
      else
      {
         if (value == null) value = ""; 
         Console.WriteLine("Attempted conversion of '{0}' failed.", value);
      }
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:31，代碼來源:Int64.TryParse

輸出：

Attempted conversion of '' failed.
Converted '160519' to 160519.
Attempted conversion of '9432.0' failed.
Attempted conversion of '16,667' failed.
Converted '   -322   ' to -322.
Converted '+4302' to 4302.
Attempted conversion of '(100);' failed.
Attempted conversion of '01FA' failed.

示例2: Main

//引入命名空間
using System;
using System.Globalization;

public class StringParsing
{
   public static void Main()
   {
      string numericString;
      NumberStyles styles;
      
      numericString = "106779";
      styles = NumberStyles.Integer;
      CallTryParse(numericString, styles);

      numericString = "-30677";
      styles = NumberStyles.None;
      CallTryParse(numericString, styles);
      
      styles = NumberStyles.AllowLeadingSign;
      CallTryParse(numericString, styles);
      
      numericString = "301677-";
      CallTryParse(numericString, styles);
      
      styles = styles | NumberStyles.AllowTrailingSign;
      CallTryParse(numericString, styles);
      
      numericString = "$10634";
      styles = NumberStyles.Integer;
      CallTryParse(numericString, styles);
      
      styles = NumberStyles.Integer | NumberStyles.AllowCurrencySymbol;
      CallTryParse(numericString, styles);
      
      numericString = "10345.00";
      styles = NumberStyles.Integer | NumberStyles.AllowDecimalPoint;
      CallTryParse(numericString, styles);
      
      numericString = "10345.72";
      styles = NumberStyles.Integer | NumberStyles.AllowDecimalPoint;
      CallTryParse(numericString, styles);

      numericString = "22,593"; 
      styles = NumberStyles.Integer | NumberStyles.AllowThousands;
      CallTryParse(numericString, styles);
      
      numericString = "12E-01";
      styles = NumberStyles.Integer | NumberStyles.AllowExponent;
      CallTryParse(numericString, styles); 
          
      numericString = "12E03";
      CallTryParse(numericString, styles); 
      
      numericString = "80c1";
      CallTryParse(numericString, NumberStyles.HexNumber);
      
      numericString = "0x80C1";
      CallTryParse(numericString, NumberStyles.HexNumber);      
   }

   private static void CallTryParse(string stringToConvert, NumberStyles styles)
   {
      CultureInfo provider;
      
      // If currency symbol is allowed, use en-US culture.
      if ((styles & NumberStyles.AllowCurrencySymbol) > 0)
         provider = new CultureInfo("en-US");
      else
         provider = CultureInfo.InvariantCulture;
            
      bool success = Int64.TryParse(stringToConvert, styles,
                                   provider, out long number);
      if (success)
         Console.WriteLine("Converted '{0}' to {1}.", stringToConvert, number);
      else
         Console.WriteLine("Attempted conversion of '{0}' failed.", 
                           Convert.ToString(stringToConvert));
   }
}

開發者ID:.NET開發者，項目名稱:System，代碼行數:80，代碼來源:Int64.TryParse

輸出：

Converted '106779' to 106779.
Attempted conversion of '-30677' failed.
Converted '-30677' to -30677.
Attempted conversion of '301677-' failed.
Converted '301677-' to -301677.
Attempted conversion of '$10634' failed.
Converted '$10634' to 10634.
Converted '10345.00' to 10345.
Attempted conversion of '10345.72' failed.
Converted '22,593' to 22593.
Attempted conversion of '12E-01' failed.
Converted '12E03' to 12000.
Converted '80c1' to 32961.
Attempted conversion of '0x80C1' failed.

注：本文中的System.Int64.TryParse方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台，相關代碼片段篩選自各路編程大神貢獻的開源項目，源碼版權歸原作者所有，傳播和使用請參考對應項目的License；未經允許，請勿轉載。