TimeSpan.TryParse 方法

参考

定义

命名空间:: System

程序集:: System.Runtime.dll

程序集:: mscorlib.dll

程序集:: netstandard.dll

重要

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将时间间隔的指定字符串表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。

重载

TryParse(String, TimeSpan)	将时间间隔的字符串表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。
TryParse(ReadOnlySpan<Char>, IFormatProvider, TimeSpan)	使用指定的区域性特定的格式设置信息将时间间隔的跨度表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。
TryParse(ReadOnlySpan<Char>, TimeSpan)	将时间间隔的跨度表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。
TryParse(String, IFormatProvider, TimeSpan)	使用指定的区域性特定的格式设置信息将时间间隔的字符串表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。

TryParse(String, TimeSpan)

Source:: TimeSpan.cs

Source:: TimeSpan.cs

Source:: TimeSpan.cs

将时间间隔的字符串表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。

public:
 static bool TryParse(System::String ^ s, [Runtime::InteropServices::Out] TimeSpan % result);

public static bool TryParse (string s, out TimeSpan result);

public static bool TryParse (string? s, out TimeSpan result);

static member TryParse : string * TimeSpan -> bool

Public Shared Function TryParse (s As String, ByRef result As TimeSpan) As Boolean

参数

s: String

一个字符串，指定要转换的时间间隔。

result: TimeSpan

此方法返回时，包含一个对象，该对象表示由 s指定的时间间隔;如果转换失败，则 Zero。此参数未初始化传递。

Boolean

如果已成功转换 s，则 true;否则，false。如果 s 参数 null 或 Empty，则此操作将返回 false，表示时间间隔小于 TimeSpan.MinValue 或大于 TimeSpan.MaxValue，或者至少有一天、小时、分钟或秒部分超出有效范围。

示例

以下示例使用 TryParse 方法从有效的 TimeSpan 字符串创建 TimeSpan 对象，并指示分析操作何时失败，因为时间跨度字符串无效。

using System;

public class TryParse
{
   private static void ParseTimeSpan(string intervalStr)
   {
      // Write the first part of the output line.
      Console.Write( "{0,20}   ", intervalStr );

      // Parse the parameter, and then convert it back to a string.
      TimeSpan intervalVal; 
      if (TimeSpan.TryParse(intervalStr, out intervalVal)) 
      {
         string intervalToStr = intervalVal.ToString();
  
         // Pad the end of the TimeSpan string with spaces if it 
         // does not contain milliseconds.
         int pIndex = intervalToStr.IndexOf(':');
         pIndex = intervalToStr.IndexOf('.', pIndex);
         if (pIndex < 0)
            intervalToStr += "        ";
   
         Console.WriteLine("{0,21}", intervalToStr);
         // Handle failure of TryParse method.
      }
      else
      {
         Console.WriteLine("Parse operation failed.");
      }
   } 
   
   public static void Main()
   {
        Console.WriteLine( "{0,20}   {1,21}", 
            "String to Parse", "TimeSpan" );    
        Console.WriteLine( "{0,20}   {1,21}", 
            "---------------", "---------------------" );    

        ParseTimeSpan("0");
        ParseTimeSpan("14");
        ParseTimeSpan("1:2:3");
        ParseTimeSpan("0:0:0.250");
        ParseTimeSpan("10.20:30:40.50");
        ParseTimeSpan("99.23:59:59.9999999");
        ParseTimeSpan("0023:0059:0059.0099");
        ParseTimeSpan("23:0:0");
        ParseTimeSpan("24:0:0");
        ParseTimeSpan("0:59:0");
        ParseTimeSpan("0:60:0");
        ParseTimeSpan("0:0:59");
        ParseTimeSpan("0:0:60");
        ParseTimeSpan("10:");
        ParseTimeSpan("10:0");
        ParseTimeSpan(":10");
        ParseTimeSpan("0:10");
        ParseTimeSpan("10:20:");
        ParseTimeSpan("10:20:0");
        ParseTimeSpan(".123");
        ParseTimeSpan("0.12:00");
        ParseTimeSpan("10.");
        ParseTimeSpan("10.12");
        ParseTimeSpan("10.12:00");
   }
}
//            String to Parse                TimeSpan
//            ---------------   ---------------------
//                          0        00:00:00
//                         14     14.00:00:00
//                      1:2:3        01:02:03
//                  0:0:0.250        00:00:00.2500000
//             10.20:30:40.50     10.20:30:40.5000000
//        99.23:59:59.9999999     99.23:59:59.9999999
//        0023:0059:0059.0099        23:59:59.0099000
//                     23:0:0        23:00:00
//                     24:0:0   Parse operation failed.
//                     0:59:0        00:59:00
//                     0:60:0   Parse operation failed.
//                     0:0:59        00:00:59
//                     0:0:60   Parse operation failed.
//                        10:   Parse operation failed.
//                       10:0        10:00:00
//                        :10   Parse operation failed.
//                       0:10        00:10:00
//                     10:20:   Parse operation failed.
//                    10:20:0        10:20:00
//                       .123   Parse operation failed.
//                    0.12:00        12:00:00
//                        10.   Parse operation failed.
//                      10.12   Parse operation failed.
//                   10.12:00     10.12:00:00

open System

let parseTimeSpan intervalStr =
    // Write the first part of the output line.
    printf $"%20s{intervalStr}   "

    // Parse the parameter, and then convert it back to a string.
    match TimeSpan.TryParse intervalStr with
    | true, intervalVal ->
        let intervalToStr = string intervalVal

        // Pad the end of the TimeSpan string with spaces if it 
        // does not contain milliseconds.
        let pIndex = intervalToStr.IndexOf ':'
        let pIndex = intervalToStr.IndexOf('.', pIndex)
        let intervalToStr =
            if pIndex < 0 then
                intervalToStr + "        "
            else intervalStr
        printfn $"{intervalToStr,21}"
        // Handle failure of TryParse method.
    | _ ->
        printfn "Parse operation failed."

printfn "%20s   %21s" "String to Parse" "TimeSpan"
printfn "%20s   %21s" "---------------" "---------------------"

parseTimeSpan "0"
parseTimeSpan "14"
parseTimeSpan "1:2:3"
parseTimeSpan "0:0:0.250"
parseTimeSpan "10.20:30:40.50"
parseTimeSpan "99.23:59:59.9999999"
parseTimeSpan "0023:0059:0059.0099"
parseTimeSpan "23:0:0"
parseTimeSpan "24:0:0"
parseTimeSpan "0:59:0"
parseTimeSpan "0:60:0"
parseTimeSpan "0:0:59"
parseTimeSpan "0:0:60"
parseTimeSpan "10:"
parseTimeSpan "10:0"
parseTimeSpan ":10"
parseTimeSpan "0:10"
parseTimeSpan "10:20:"
parseTimeSpan "10:20:0"
parseTimeSpan ".123"
parseTimeSpan "0.12:00"
parseTimeSpan "10."
parseTimeSpan "10.12"
parseTimeSpan "10.12:00"
//            String to Parse                TimeSpan
//            ---------------   ---------------------
//                          0        00:00:00
//                         14     14.00:00:00
//                      1:2:3        01:02:03
//                  0:0:0.250        00:00:00.2500000
//             10.20:30:40.50     10.20:30:40.5000000
//        99.23:59:59.9999999     99.23:59:59.9999999
//        0023:0059:0059.0099        23:59:59.0099000
//                     23:0:0        23:00:00
//                     24:0:0   Parse operation failed.
//                     0:59:0        00:59:00
//                     0:60:0   Parse operation failed.
//                     0:0:59        00:00:59
//                     0:0:60   Parse operation failed.
//                        10:   Parse operation failed.
//                       10:0        10:00:00
//                        :10   Parse operation failed.
//                       0:10        00:10:00
//                     10:20:   Parse operation failed.
//                    10:20:0        10:20:00
//                       .123   Parse operation failed.
//                    0.12:00        12:00:00
//                        10.   Parse operation failed.
//                      10.12   Parse operation failed.
//                   10.12:00     10.12:00:00

Module TryParse
    Sub ParseTimeSpan( intervalStr As String )
        ' Write the first part of the output line.
        Console.Write( "{0,20}   ", intervalStr )

        ' Parse the parameter, and then convert it back to a string.
         Dim intervalVal As TimeSpan 
         If TimeSpan.TryParse( intervalStr, intervalVal ) Then
            Dim intervalToStr As String = intervalVal.ToString( )
   
            ' Pad the end of the TimeSpan string with spaces if it 
            ' does not contain milliseconds.
            Dim pIndex As Integer = intervalToStr.IndexOf( ":"c )
            pIndex = intervalToStr.IndexOf( "."c, pIndex )
            If pIndex < 0 Then   intervalToStr &= "        "
   
            Console.WriteLine( "{0,21}", intervalToStr )
         ' Handle failure of TryParse method.
         Else
            Console.WriteLine("Parse operation failed.")
        End If
    End Sub 

    Public Sub Main( )
        Console.WriteLine( "{0,20}   {1,21}", _
            "String to Parse", "TimeSpan" )    
        Console.WriteLine( "{0,20}   {1,21}", _
            "---------------", "---------------------" )    

        ParseTimeSpan("0")
        ParseTimeSpan("14")
        ParseTimeSpan("1:2:3")
        ParseTimeSpan("0:0:0.250")
        ParseTimeSpan("10.20:30:40.50")
        ParseTimeSpan("99.23:59:59.9999999")
        ParseTimeSpan("0023:0059:0059.0099")
        ParseTimeSpan("23:0:0")
        ParseTimeSpan("24:0:0")
        ParseTimespan("0:59:0")
        ParseTimeSpan("0:60:0")
        ParseTimespan("0:0:59")
        ParseTimeSpan("0:0:60")
        ParseTimeSpan("10:")
        ParsetimeSpan("10:0")
        ParseTimeSpan(":10")
        ParseTimeSpan("0:10")
        ParseTimeSpan("10:20:")
        ParseTimeSpan("10:20:0")
        ParseTimeSpan(".123")
        ParseTimeSpan("0.12:00")
        ParseTimeSpan("10.")
        ParseTimeSpan("10.12")
        ParseTimeSpan("10.12:00")
    End Sub 
End Module 
' This example generates the following output:
'            String to Parse                TimeSpan
'            ---------------   ---------------------
'                          0        00:00:00
'                         14     14.00:00:00
'                      1:2:3        01:02:03
'                  0:0:0.250        00:00:00.2500000
'             10.20:30:40.50     10.20:30:40.5000000
'        99.23:59:59.9999999     99.23:59:59.9999999
'        0023:0059:0059.0099        23:59:59.0099000
'                     23:0:0        23:00:00
'                     24:0:0   Parse operation failed.
'                     0:59:0        00:59:00
'                     0:60:0   Parse operation failed.
'                     0:0:59        00:00:59
'                     0:0:60   Parse operation failed.
'                        10:   Parse operation failed.
'                       10:0        10:00:00
'                        :10   Parse operation failed.
'                       0:10        00:10:00
'                     10:20:   Parse operation failed.
'                    10:20:0        10:20:00
'                       .123   Parse operation failed.
'                    0.12:00        12:00:00
'                        10.   Parse operation failed.
'                      10.12   Parse operation failed.
'                   10.12:00     10.12:00:00

注解

有关此 API 的详细信息，请参阅 TimeSpan.TryParse的补充 API 备注。

适用于

TryParse(ReadOnlySpan<Char>, IFormatProvider, TimeSpan)

Source:: TimeSpan.cs

Source:: TimeSpan.cs

Source:: TimeSpan.cs

使用指定的区域性特定的格式设置信息将时间间隔的跨度表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。

public:
 static bool TryParse(ReadOnlySpan<char> input, IFormatProvider ^ formatProvider, [Runtime::InteropServices::Out] TimeSpan % result);

public:
 static bool TryParse(ReadOnlySpan<char> input, IFormatProvider ^ formatProvider, [Runtime::InteropServices::Out] TimeSpan % result) = ISpanParsable<TimeSpan>::TryParse;

public static bool TryParse (ReadOnlySpan<char> input, IFormatProvider? formatProvider, out TimeSpan result);

public static bool TryParse (ReadOnlySpan<char> input, IFormatProvider formatProvider, out TimeSpan result);

static member TryParse : ReadOnlySpan<char> * IFormatProvider * TimeSpan -> bool

Public Shared Function TryParse (input As ReadOnlySpan(Of Char), formatProvider As IFormatProvider, ByRef result As TimeSpan) As Boolean

参数

input: ReadOnlySpan<Char>

包含表示要转换的时间间隔的字符的范围。

formatProvider: IFormatProvider

提供区域性特定的格式设置信息的对象。

result: TimeSpan

此方法返回时，包含一个对象，该对象表示由 input指定的时间间隔;如果转换失败，则 Zero。此参数未初始化传递。

Boolean

如果已成功转换 input，则 true;否则，false。如果 input 参数 null 或 Empty，则此操作将返回 false，表示时间间隔小于 TimeSpan.MinValue 或大于 TimeSpan.MaxValue，或者至少有一天、小时、分钟或秒部分超出有效范围。

适用于

TryParse(ReadOnlySpan<Char>, TimeSpan)

Source:: TimeSpan.cs

Source:: TimeSpan.cs

Source:: TimeSpan.cs

将时间间隔的跨度表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。

public:
 static bool TryParse(ReadOnlySpan<char> s, [Runtime::InteropServices::Out] TimeSpan % result);

public static bool TryParse (ReadOnlySpan<char> s, out TimeSpan result);

static member TryParse : ReadOnlySpan<char> * TimeSpan -> bool

Public Shared Function TryParse (s As ReadOnlySpan(Of Char), ByRef result As TimeSpan) As Boolean

参数

s: ReadOnlySpan<Char>

包含表示要转换的时间间隔的字符的范围。

result: TimeSpan

此方法返回时，包含一个对象，该对象表示由 s指定的时间间隔;如果转换失败，则 Zero。此参数未初始化传递。

Boolean

适用于

TryParse(String, IFormatProvider, TimeSpan)

Source:: TimeSpan.cs

Source:: TimeSpan.cs

Source:: TimeSpan.cs

使用指定的区域性特定的格式设置信息将时间间隔的字符串表示形式转换为其等效 TimeSpan，并返回一个值，该值指示转换是否成功。

public:
 static bool TryParse(System::String ^ input, IFormatProvider ^ formatProvider, [Runtime::InteropServices::Out] TimeSpan % result);

public:
 static bool TryParse(System::String ^ input, IFormatProvider ^ formatProvider, [Runtime::InteropServices::Out] TimeSpan % result) = IParsable<TimeSpan>::TryParse;

public static bool TryParse (string input, IFormatProvider formatProvider, out TimeSpan result);

public static bool TryParse (string? input, IFormatProvider? formatProvider, out TimeSpan result);

static member TryParse : string * IFormatProvider * TimeSpan -> bool

Public Shared Function TryParse (input As String, formatProvider As IFormatProvider, ByRef result As TimeSpan) As Boolean

参数

input: String

一个字符串，指定要转换的时间间隔。

formatProvider: IFormatProvider

提供区域性特定的格式设置信息的对象。

result: TimeSpan

此方法返回时，包含一个对象，该对象表示由 input指定的时间间隔;如果转换失败，则 Zero。此参数未初始化传递。

Boolean

示例

以下示例定义 CultureInfo 对象的数组，并使用调用 TryParse(String, IFormatProvider, TimeSpan) 方法中的每个对象来分析字符串数组中的元素。该示例说明了特定区域性的约定如何影响格式设置操作。

using System;
using System.Globalization;

public class Example
{
   public static void Main()
   {
      string[] values = { "6", "6:12", "6:12:14", "6:12:14:45", 
                          "6.12:14:45", "6:12:14:45.3448", 
                          "6:12:14:45,3448", "6:34:14:45" };
      CultureInfo[] cultures = { new CultureInfo("en-US"), 
                                 new CultureInfo("ru-RU"),
                                 CultureInfo.InvariantCulture };
      
      string header = String.Format("{0,-17}", "String");
      foreach (CultureInfo culture in cultures)
         header += culture.Equals(CultureInfo.InvariantCulture) ? 
                      String.Format("{0,20}", "Invariant") :
                      String.Format("{0,20}", culture.Name);

      Console.WriteLine(header);
      Console.WriteLine();
      
      foreach (string value in values)
      {
         Console.Write("{0,-17}", value);
         foreach (CultureInfo culture in cultures)
         {
            TimeSpan interval = new TimeSpan();
            if (TimeSpan.TryParse(value, culture, out interval))
               Console.Write("{0,20}", interval.ToString("c"));
            else
               Console.Write("{0,20}", "Unable to Parse");
         }
         Console.WriteLine();                                
      }
   }
}
// The example displays the following output:
//    String                          en-US               ru-RU           Invariant
//    
//    6                          6.00:00:00          6.00:00:00          6.00:00:00
//    6:12                         06:12:00            06:12:00            06:12:00
//    6:12:14                      06:12:14            06:12:14            06:12:14
//    6:12:14:45                 6.12:14:45          6.12:14:45          6.12:14:45
//    6.12:14:45                 6.12:14:45          6.12:14:45          6.12:14:45
//    6:12:14:45.3448    6.12:14:45.3448000     Unable to Parse  6.12:14:45.3448000
//    6:12:14:45,3448       Unable to Parse  6.12:14:45.3448000     Unable to Parse
//    6:34:14:45            Unable to Parse     Unable to Parse     Unable to Parse

open System
open System.Globalization

let values = 
    [| "6"; "6:12"; "6:12:14"; "6:12:14:45" 
       "6.12:14:45"; "6:12:14:45.3448" 
       "6:12:14:45,3448"; "6:34:14:45" |]
let cultures = 
    [| CultureInfo "en-US" 
       CultureInfo "ru-RU"
       CultureInfo.InvariantCulture |] 

let mutable header = String.Format("{0,-17}", "String")
for culture in cultures do
    header <- 
        if culture.Equals CultureInfo.InvariantCulture then
            String.Format("{0,20}", "Invariant")
        else
            String.Format("{0,20}", culture.Name)

printfn $"{header}\n"

for value in values do
    printf $"{value,-17}"
    for culture in cultures do
        match TimeSpan.TryParse(value, culture) with
        | true, interval -> 
            printfn $"{interval,20:c}"
        | _ ->
            printfn "%20s" "Unable to Parse"
// The example displays the following output:
//    String                          en-US               ru-RU           Invariant
//    
//    6                          6.00:00:00          6.00:00:00          6.00:00:00
//    6:12                         06:12:00            06:12:00            06:12:00
//    6:12:14                      06:12:14            06:12:14            06:12:14
//    6:12:14:45                 6.12:14:45          6.12:14:45          6.12:14:45
//    6.12:14:45                 6.12:14:45          6.12:14:45          6.12:14:45
//    6:12:14:45.3448    6.12:14:45.3448000     Unable to Parse  6.12:14:45.3448000
//    6:12:14:45,3448       Unable to Parse  6.12:14:45.3448000     Unable to Parse
//    6:34:14:45            Unable to Parse     Unable to Parse     Unable to Parse

Imports System.Globalization

Module Example
   Public Sub Main()
      Dim values() As String = { "6", "6:12", "6:12:14", "6:12:14:45", 
                                 "6.12:14:45", "6:12:14:45.3448", 
                                 "6:12:14:45,3448", "6:34:14:45" }
      Dim cultures() As CultureInfo = { New CultureInfo("en-US"), 
                                        New CultureInfo("ru-RU"),
                                        CultureInfo.InvariantCulture }
      
      Dim header As String = String.Format("{0,-17}", "String")
      For Each culture As CultureInfo In cultures
         header += If(culture.Equals(CultureInfo.InvariantCulture), 
                      String.Format("{0,20}", "Invariant"),
                      String.Format("{0,20}", culture.Name))
      Next
      Console.WriteLine(header)
      Console.WriteLine()
      
      For Each value As String In values
         Console.Write("{0,-17}", value)
         For Each culture As CultureInfo In cultures
            Dim interval As New TimeSpan()
            If TimeSpan.TryParse(value, culture, interval) Then
               Console.Write("{0,20}", interval.ToString("c"))
            Else
               Console.Write("{0,20}", "Unable to Parse")
            End If     
         Next
         Console.WriteLine()                                
      Next
   End Sub
End Module
' The example displays the following output:
'    String                          en-US               ru-RU           Invariant
'    
'    6                          6.00:00:00          6.00:00:00          6.00:00:00
'    6:12                         06:12:00            06:12:00            06:12:00
'    6:12:14                      06:12:14            06:12:14            06:12:14
'    6:12:14:45                 6.12:14:45          6.12:14:45          6.12:14:45
'    6.12:14:45                 6.12:14:45          6.12:14:45          6.12:14:45
'    6:12:14:45.3448    6.12:14:45.3448000     Unable to Parse  6.12:14:45.3448000
'    6:12:14:45,3448       Unable to Parse  6.12:14:45.3448000     Unable to Parse
'    6:34:14:45            Unable to Parse     Unable to Parse     Unable to Parse

注解

有关此 API 的详细信息，请参阅 TimeSpan.TryParse的补充 API 备注。

适用于

通过

TimeSpan.TryParse 方法

定义

重载

TryParse(String, TimeSpan)

参数

返回

示例

注解

适用于

TryParse(ReadOnlySpan<Char>, IFormatProvider, TimeSpan)

参数

返回

适用于

TryParse(ReadOnlySpan<Char>, TimeSpan)

参数

返回

适用于

TryParse(String, IFormatProvider, TimeSpan)

参数

返回

示例

注解

适用于

其他资源