Int64 结构

定义

public value class long : IComparable, IComparable<long>, IConvertible, IEquatable<long>, IFormattable

public value class long : IComparable<long>, IConvertible, IEquatable<long>, IParsable<long>, ISpanParsable<long>, IUtf8SpanParsable<long>, System::Numerics::IAdditionOperators<long, long, long>, System::Numerics::IAdditiveIdentity<long, long>, System::Numerics::IBinaryInteger<long>, System::Numerics::IBinaryNumber<long>, System::Numerics::IBitwiseOperators<long, long, long>, System::Numerics::IComparisonOperators<long, long, bool>, System::Numerics::IDecrementOperators<long>, System::Numerics::IDivisionOperators<long, long, long>, System::Numerics::IEqualityOperators<long, long, bool>, System::Numerics::IIncrementOperators<long>, System::Numerics::IMinMaxValue<long>, System::Numerics::IModulusOperators<long, long, long>, System::Numerics::IMultiplicativeIdentity<long, long>, System::Numerics::IMultiplyOperators<long, long, long>, System::Numerics::INumber<long>, System::Numerics::INumberBase<long>, System::Numerics::IShiftOperators<long, int, long>, System::Numerics::ISignedNumber<long>, System::Numerics::ISubtractionOperators<long, long, long>, System::Numerics::IUnaryNegationOperators<long, long>, System::Numerics::IUnaryPlusOperators<long, long>

public value class long : IComparable, IComparable<long>, IConvertible, IEquatable<long>, ISpanFormattable

public value class long : IComparable<long>, IConvertible, IEquatable<long>, IParsable<long>, ISpanParsable<long>, System::Numerics::IAdditionOperators<long, long, long>, System::Numerics::IAdditiveIdentity<long, long>, System::Numerics::IBinaryInteger<long>, System::Numerics::IBinaryNumber<long>, System::Numerics::IBitwiseOperators<long, long, long>, System::Numerics::IComparisonOperators<long, long, bool>, System::Numerics::IDecrementOperators<long>, System::Numerics::IDivisionOperators<long, long, long>, System::Numerics::IEqualityOperators<long, long, bool>, System::Numerics::IIncrementOperators<long>, System::Numerics::IMinMaxValue<long>, System::Numerics::IModulusOperators<long, long, long>, System::Numerics::IMultiplicativeIdentity<long, long>, System::Numerics::IMultiplyOperators<long, long, long>, System::Numerics::INumber<long>, System::Numerics::INumberBase<long>, System::Numerics::IShiftOperators<long, int, long>, System::Numerics::ISignedNumber<long>, System::Numerics::ISubtractionOperators<long, long, long>, System::Numerics::IUnaryNegationOperators<long, long>, System::Numerics::IUnaryPlusOperators<long, long>

public value class long : IComparable, IConvertible, IFormattable

public value class long : IComparable, IComparable<long>, IEquatable<long>, IFormattable

public struct Int64 : IComparable, IComparable<long>, IConvertible, IEquatable<long>, IFormattable

public readonly struct Int64 : IComparable<long>, IConvertible, IEquatable<long>, IParsable<long>, ISpanParsable<long>, IUtf8SpanParsable<long>, System.Numerics.IAdditionOperators<long,long,long>, System.Numerics.IAdditiveIdentity<long,long>, System.Numerics.IBinaryInteger<long>, System.Numerics.IBinaryNumber<long>, System.Numerics.IBitwiseOperators<long,long,long>, System.Numerics.IComparisonOperators<long,long,bool>, System.Numerics.IDecrementOperators<long>, System.Numerics.IDivisionOperators<long,long,long>, System.Numerics.IEqualityOperators<long,long,bool>, System.Numerics.IIncrementOperators<long>, System.Numerics.IMinMaxValue<long>, System.Numerics.IModulusOperators<long,long,long>, System.Numerics.IMultiplicativeIdentity<long,long>, System.Numerics.IMultiplyOperators<long,long,long>, System.Numerics.INumber<long>, System.Numerics.INumberBase<long>, System.Numerics.IShiftOperators<long,int,long>, System.Numerics.ISignedNumber<long>, System.Numerics.ISubtractionOperators<long,long,long>, System.Numerics.IUnaryNegationOperators<long,long>, System.Numerics.IUnaryPlusOperators<long,long>

public readonly struct Int64 : IComparable, IComparable<long>, IConvertible, IEquatable<long>, IFormattable

public readonly struct Int64 : IComparable, IComparable<long>, IConvertible, IEquatable<long>, ISpanFormattable

public readonly struct Int64 : IComparable<long>, IConvertible, IEquatable<long>, IParsable<long>, ISpanParsable<long>, System.Numerics.IAdditionOperators<long,long,long>, System.Numerics.IAdditiveIdentity<long,long>, System.Numerics.IBinaryInteger<long>, System.Numerics.IBinaryNumber<long>, System.Numerics.IBitwiseOperators<long,long,long>, System.Numerics.IComparisonOperators<long,long,bool>, System.Numerics.IDecrementOperators<long>, System.Numerics.IDivisionOperators<long,long,long>, System.Numerics.IEqualityOperators<long,long,bool>, System.Numerics.IIncrementOperators<long>, System.Numerics.IMinMaxValue<long>, System.Numerics.IModulusOperators<long,long,long>, System.Numerics.IMultiplicativeIdentity<long,long>, System.Numerics.IMultiplyOperators<long,long,long>, System.Numerics.INumber<long>, System.Numerics.INumberBase<long>, System.Numerics.IShiftOperators<long,int,long>, System.Numerics.ISignedNumber<long>, System.Numerics.ISubtractionOperators<long,long,long>, System.Numerics.IUnaryNegationOperators<long,long>, System.Numerics.IUnaryPlusOperators<long,long>

[System.Serializable]
public struct Int64 : IComparable, IConvertible, IFormattable

[System.Serializable]
[System.Runtime.InteropServices.ComVisible(true)]
public struct Int64 : IComparable, IComparable<long>, IConvertible, IEquatable<long>, IFormattable

public struct Int64 : IComparable, IComparable<long>, IEquatable<long>, IFormattable

type int64 = struct
    interface IConvertible
    interface IFormattable

type int64 = struct
    interface IConvertible
    interface IFormattable
    interface IParsable<int64>
    interface ISpanFormattable
    interface ISpanParsable<int64>
    interface IUtf8SpanFormattable
    interface IUtf8SpanParsable<int64>
    interface IAdditionOperators<int64, int64, int64>
    interface IAdditiveIdentity<int64, int64>
    interface IBinaryInteger<int64>
    interface IBinaryNumber<int64>
    interface IBitwiseOperators<int64, int64, int64>
    interface IComparisonOperators<int64, int64, bool>
    interface IEqualityOperators<int64, int64, bool>
    interface IDecrementOperators<int64>
    interface IDivisionOperators<int64, int64, int64>
    interface IIncrementOperators<int64>
    interface IModulusOperators<int64, int64, int64>
    interface IMultiplicativeIdentity<int64, int64>
    interface IMultiplyOperators<int64, int64, int64>
    interface INumber<int64>
    interface INumberBase<int64>
    interface ISubtractionOperators<int64, int64, int64>
    interface IUnaryNegationOperators<int64, int64>
    interface IUnaryPlusOperators<int64, int64>
    interface IShiftOperators<int64, int, int64>
    interface IMinMaxValue<int64>
    interface ISignedNumber<int64>

type int64 = struct
    interface IConvertible
    interface ISpanFormattable
    interface IFormattable

type int64 = struct
    interface IConvertible
    interface IFormattable
    interface IParsable<int64>
    interface ISpanFormattable
    interface ISpanParsable<int64>
    interface IAdditionOperators<int64, int64, int64>
    interface IAdditiveIdentity<int64, int64>
    interface IBinaryInteger<int64>
    interface IBinaryNumber<int64>
    interface IBitwiseOperators<int64, int64, int64>
    interface IComparisonOperators<int64, int64, bool>
    interface IEqualityOperators<int64, int64, bool>
    interface IDecrementOperators<int64>
    interface IDivisionOperators<int64, int64, int64>
    interface IIncrementOperators<int64>
    interface IModulusOperators<int64, int64, int64>
    interface IMultiplicativeIdentity<int64, int64>
    interface IMultiplyOperators<int64, int64, int64>
    interface INumber<int64>
    interface INumberBase<int64>
    interface ISubtractionOperators<int64, int64, int64>
    interface IUnaryNegationOperators<int64, int64>
    interface IUnaryPlusOperators<int64, int64>
    interface IShiftOperators<int64, int, int64>
    interface IMinMaxValue<int64>
    interface ISignedNumber<int64>

type int64 = struct
    interface IConvertible
    interface IFormattable
    interface IParsable<int64>
    interface ISpanFormattable
    interface ISpanParsable<int64>
    interface IAdditionOperators<int64, int64, int64>
    interface IAdditiveIdentity<int64, int64>
    interface IBinaryInteger<int64>
    interface IBinaryNumber<int64>
    interface IBitwiseOperators<int64, int64, int64>
    interface IComparisonOperators<int64, int64, bool>
    interface IEqualityOperators<int64, int64, bool>
    interface IDecrementOperators<int64>
    interface IDivisionOperators<int64, int64, int64>
    interface IIncrementOperators<int64>
    interface IModulusOperators<int64, int64, int64>
    interface IMultiplicativeIdentity<int64, int64>
    interface IMultiplyOperators<int64, int64, int64>
    interface INumber<int64>
    interface INumberBase<int64>
    interface ISubtractionOperators<int64, int64, int64>
    interface IUnaryNegationOperators<int64, int64>
    interface IUnaryPlusOperators<int64, int64>
    interface IUtf8SpanFormattable
    interface IUtf8SpanParsable<int64>
    interface IShiftOperators<int64, int, int64>
    interface IMinMaxValue<int64>
    interface ISignedNumber<int64>

[<System.Serializable>]
type int64 = struct
    interface IFormattable
    interface IConvertible

[<System.Serializable>]
[<System.Runtime.InteropServices.ComVisible(true)>]
type int64 = struct
    interface IFormattable
    interface IConvertible

type int64 = struct
    interface IFormattable

Public Structure Int64
Implements IComparable, IComparable(Of Long), IConvertible, IEquatable(Of Long), IFormattable

Public Structure Int64
Implements IAdditionOperators(Of Long, Long, Long), IAdditiveIdentity(Of Long, Long), IBinaryInteger(Of Long), IBinaryNumber(Of Long), IBitwiseOperators(Of Long, Long, Long), IComparable(Of Long), IComparisonOperators(Of Long, Long, Boolean), IConvertible, IDecrementOperators(Of Long), IDivisionOperators(Of Long, Long, Long), IEqualityOperators(Of Long, Long, Boolean), IEquatable(Of Long), IIncrementOperators(Of Long), IMinMaxValue(Of Long), IModulusOperators(Of Long, Long, Long), IMultiplicativeIdentity(Of Long, Long), IMultiplyOperators(Of Long, Long, Long), INumber(Of Long), INumberBase(Of Long), IParsable(Of Long), IShiftOperators(Of Long, Integer, Long), ISignedNumber(Of Long), ISpanParsable(Of Long), ISubtractionOperators(Of Long, Long, Long), IUnaryNegationOperators(Of Long, Long), IUnaryPlusOperators(Of Long, Long), IUtf8SpanParsable(Of Long)

Public Structure Int64
Implements IComparable, IComparable(Of Long), IConvertible, IEquatable(Of Long), ISpanFormattable

Public Structure Int64
Implements IAdditionOperators(Of Long, Long, Long), IAdditiveIdentity(Of Long, Long), IBinaryInteger(Of Long), IBinaryNumber(Of Long), IBitwiseOperators(Of Long, Long, Long), IComparable(Of Long), IComparisonOperators(Of Long, Long, Boolean), IConvertible, IDecrementOperators(Of Long), IDivisionOperators(Of Long, Long, Long), IEqualityOperators(Of Long, Long, Boolean), IEquatable(Of Long), IIncrementOperators(Of Long), IMinMaxValue(Of Long), IModulusOperators(Of Long, Long, Long), IMultiplicativeIdentity(Of Long, Long), IMultiplyOperators(Of Long, Long, Long), INumber(Of Long), INumberBase(Of Long), IParsable(Of Long), IShiftOperators(Of Long, Integer, Long), ISignedNumber(Of Long), ISpanParsable(Of Long), ISubtractionOperators(Of Long, Long, Long), IUnaryNegationOperators(Of Long, Long), IUnaryPlusOperators(Of Long, Long)

Public Structure Int64
Implements IComparable, IConvertible, IFormattable

Public Structure Int64
Implements IComparable, IComparable(Of Long), IEquatable(Of Long), IFormattable

继承

Object

ValueType

Int64

属性

SerializableAttribute ComVisibleAttribute

实现

IComparable IComparable<Int64> IConvertible IEquatable<Int64> IFormattable IComparable<TSelf> IEquatable<TSelf> IParsable<Int64> IParsable<TSelf> ISpanFormattable ISpanParsable<Int64> ISpanParsable<TSelf> IUtf8SpanFormattable IUtf8SpanParsable<Int64> IUtf8SpanParsable<TSelf> IAdditionOperators<Int64,Int64,Int64> IAdditionOperators<TSelf,TSelf,TSelf> IAdditiveIdentity<Int64,Int64> IAdditiveIdentity<TSelf,TSelf> IBinaryInteger<Int64> IBinaryNumber<Int64> IBinaryNumber<TSelf> IBitwiseOperators<Int64,Int64,Int64> IBitwiseOperators<TSelf,TSelf,TSelf> IComparisonOperators<Int64,Int64,Boolean> IComparisonOperators<TSelf,TSelf,Boolean> IDecrementOperators<Int64> IDecrementOperators<TSelf> IDivisionOperators<Int64,Int64,Int64> IDivisionOperators<TSelf,TSelf,TSelf> IEqualityOperators<Int64,Int64,Boolean> IEqualityOperators<TSelf,TOther,TResult> IEqualityOperators<TSelf,TSelf,Boolean> IIncrementOperators<Int64> IIncrementOperators<TSelf> IMinMaxValue<Int64> IModulusOperators<Int64,Int64,Int64> IModulusOperators<TSelf,TSelf,TSelf> IMultiplicativeIdentity<Int64,Int64> IMultiplicativeIdentity<TSelf,TSelf> IMultiplyOperators<Int64,Int64,Int64> IMultiplyOperators<TSelf,TSelf,TSelf> INumber<Int64> INumber<TSelf> INumberBase<Int64> INumberBase<TSelf> IShiftOperators<Int64,Int32,Int64> IShiftOperators<TSelf,Int32,TSelf> ISignedNumber<Int64> ISubtractionOperators<Int64,Int64,Int64> ISubtractionOperators<TSelf,TSelf,TSelf> IUnaryNegationOperators<Int64,Int64> IUnaryNegationOperators<TSelf,TSelf> IUnaryPlusOperators<Int64,Int64> IUnaryPlusOperators<TSelf,TSelf>

注解

Int64 是一个不可变值类型，表示有符号整数，其值范围为负 9,223,372,036,854,775,808（由 Int64.MinValue 常量表示）到正 9,223,372,036,854,775,807（由 Int64.MaxValue 常量表示）。 .NET 还包含一个无符号 64 位整数值类型， UInt64表示范围为 0 到 18,446,744,073,709,551,615 的值。

实例化 Int64 值

可以通过多种方式实例化 Int64 值：

• 可以声明变量 Int64 ，并为其分配数据类型范围内的 Int64 文本整数值。 以下示例声明两个 Int64 变量，并以此方式为其分配值。

  long number1 = -64301728;
  long number2 = 255486129307;
  

  let number1 = -64301728L
  let number2 = 255486129307L
  

  Dim number1 As Long = -64301728
  Dim number2 As Long = 255486129307
  

• 可以把一个其范围是 Int64 类型子集的整型类型的值赋给变量。 这是一种扩宽转换，在 C# 中不需要强制转换运算符，在 Visual Basic 中也不需要转换方法。 在 F# 中，只有类型 Int32 可以自动扩展。

  sbyte value1 = 124;
  short value2 = 1618;
  int value3 = Int32.MaxValue;
  
  long number1 = value1;
  long number2 = value2;
  long number3 = value3;
  

  let value1 = 124y
  let value2 = 1618s
  let value3 = Int32.MaxValue
  
  let number1 = int64 value1
  let number2 = int64 value2
  let number3: int64 = value3
  

  Dim value1 As SByte = 124
  Dim value2 As Int16 = 1618
  Dim value3 As Int32 = Int32.MaxValue
  
  Dim number1 As Long = value1
  Dim number2 As Long = value2
  Dim number3 As Long = value3
  

• 可以分配其范围超过该 Int64 类型的数值类型的值。 这是一个缩小的转换，因此在 C# 或 F# 中需要使用类型转换运算符，而在 Visual Basic 中需要使用转换方法，前提是 Option Strict 已启用。 如果数值是包含SingleDouble小数部分的值，Decimal则其小数部分的处理取决于执行转换的编译器。 以下示例执行缩小转换，将多个数值 Int64 分配给变量。

  ulong ulNumber = 163245617943825;
  try {
     long number1 = (long) ulNumber;
     Console.WriteLine(number1);
  }
  catch (OverflowException) {
     Console.WriteLine($"{ulNumber} is out of range of an Int64.");
  }
  
  double dbl2 = 35901.997;
  try {
     long number2 = (long) dbl2;
     Console.WriteLine(number2);
  }
  catch (OverflowException) {
     Console.WriteLine($"{dbl2} is out of range of an Int64.");
  }
  
  BigInteger bigNumber = (BigInteger) 1.63201978555e30;
  try {
     long number3 = (long) bigNumber;
     Console.WriteLine(number3);
  }
  catch (OverflowException) {
     Console.WriteLine($"{bigNumber} is out of range of an Int64.");
  }
  // The example displays the following output:
  //    163245617943825
  //    35902
  //    1,632,019,785,549,999,969,612,091,883,520 is out of range of an Int64.
  

  let ulNumber = 163245617943825uL
  try
      let number1 = int64 ulNumber
      printfn $"{number1}"
  with :? OverflowException ->
      printfn $"{ulNumber} is out of range of an Int64."
  
  let dbl2 = 35901.997
  try
      let number2 = int64 dbl2
      printfn $"{number2}"
  with :? OverflowException ->
      printfn $"{dbl2} is out of range of an Int64."
  
  let bigNumber = BigInteger 1.63201978555e30
  try
      let number3 = int64 bigNumber
      printfn $"{number3}"
  with :? OverflowException ->
      printfn $"{bigNumber} is out of range of an Int64."
  
  // The example displays the following output:
  //    163245617943825
  //    35902
  //    1,632,019,785,549,999,969,612,091,883,520 is out of range of an Int64.
  

  Dim ulNumber As ULong = 163245617943825
  Try
     Dim number1 As Long = CLng(ulNumber)
     Console.WriteLine(number1)
  Catch e As OverflowException
     Console.WriteLine("{0} is out of range of an Int64.", ulNumber)
  End Try
  
  Dim dbl2 As Double = 35901.997
  Try
     Dim number2 As Long = CLng(dbl2)
     Console.WriteLine(number2)
  Catch e As OverflowException
     Console.WriteLine("{0} is out of range of an Int64.", dbl2)
  End Try
     
  Dim bigNumber As BigInteger = 1.63201978555e30
  Try
     Dim number3 As Long = CLng(bigNumber)
     Console.WriteLine(number3)
  Catch e As OverflowException
     Console.WriteLine("{0:N0} is out of range of an Int64.", bigNumber)
  End Try    
  ' The example displays the following output:
  '    163245617943825
  '    35902
  '    1,632,019,785,549,999,969,612,091,883,520 is out of range of an Int64.
  

• 可以调用类的方法 Convert ，将任何受支持的类型转换为值 Int64 。 这是可能的，因为 Int64 支持 IConvertible 接口。 下面的示例演示了值数组 Decimal 到 Int64 值的转换。

  decimal[] values= { Decimal.MinValue, -1034.23m, -12m, 0m, 147m,
                      199.55m, 9214.16m, Decimal.MaxValue };
  long result;
  
  foreach (decimal value in values)
  {
     try {
        result = Convert.ToInt64(value);
        Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.",
                          value.GetType().Name, value,
                          result.GetType().Name, result);
     }
     catch (OverflowException) {
        Console.WriteLine("{0} is outside the range of the Int64 type.",
                          value);
     }
  }
  // The example displays the following output:
  //    -79228162514264337593543950335 is outside the range of the Int64 type.
  //    Converted the Decimal value '-1034.23' to the Int64 value -1034.
  //    Converted the Decimal value '-12' to the Int64 value -12.
  //    Converted the Decimal value '0' to the Int64 value 0.
  //    Converted the Decimal value '147' to the Int64 value 147.
  //    Converted the Decimal value '199.55' to the Int64 value 200.
  //    Converted the Decimal value '9214.16' to the Int64 value 9214.
  //    79228162514264337593543950335 is outside the range of the Int64 type.
  

  let values = 
      [| Decimal.MinValue; -1034.23m; -12m; 0m; 147m
         199.55m; 9214.16m; Decimal.MaxValue |]
  
  for value in values do
      try
          let result = Convert.ToInt64 value
          printfn $"Converted the {value.GetType().Name} value '{value}' to the {result.GetType().Name} value {result}."
      with :? OverflowException ->
          printfn $"{value} is outside the range of the Int64 type."
  // The example displays the following output:
  //    -79228162514264337593543950335 is outside the range of the Int64 type.
  //    Converted the Decimal value '-1034.23' to the Int64 value -1034.
  //    Converted the Decimal value '-12' to the Int64 value -12.
  //    Converted the Decimal value '0' to the Int64 value 0.
  //    Converted the Decimal value '147' to the Int64 value 147.
  //    Converted the Decimal value '199.55' to the Int64 value 200.
  //    Converted the Decimal value '9214.16' to the Int64 value 9214.
  //    79228162514264337593543950335 is outside the range of the Int64 type.
  

  Dim values() As Decimal = { Decimal.MinValue, -1034.23d, -12d, 0d, 147d, _
                              199.55d, 9214.16d, Decimal.MaxValue }
  Dim result As Long
  
  For Each value As Decimal In values
     Try
        result = Convert.ToInt64(value)
        Console.WriteLine("Converted the {0} value '{1}' to the {2} value {3}.", _
                          value.GetType().Name, value, _
                          result.GetType().Name, result)
     Catch e As OverflowException
        Console.WriteLine("{0} is outside the range of the Int64 type.", _
                          value)
     End Try
  Next
  ' The example displays the following output:
  '    -79228162514264337593543950335 is outside the range of the Int64 type.
  '    Converted the Decimal value '-1034.23' to the Int64 value -1034.
  '    Converted the Decimal value '-12' to the Int64 value -12.
  '    Converted the Decimal value '0' to the Int64 value 0.
  '    Converted the Decimal value '147' to the Int64 value 147.
  '    Converted the Decimal value '199.55' to the Int64 value 200.
  '    Converted the Decimal value '9214.16' to the Int64 value 9214.
  '    79228162514264337593543950335 is outside the range of the Int64 type.
  

• 可以调用 Parse 或 TryParse 方法将值的字符串表示形式 Int64 转换为 Int64。 该字符串可以包含十进制或十六进制数字。 以下示例使用十进制字符串和十六进制字符串演示了分析作。

  string string1 = "244681903147";
  try {
     long number1 = Int64.Parse(string1);
     Console.WriteLine(number1);
  }
  catch (OverflowException) {
     Console.WriteLine($"'{string1}' is out of range of a 64-bit integer.");
  }
  catch (FormatException) {
     Console.WriteLine($"The format of '{string1}' is invalid.");
  }
  
  string string2 = "F9A3CFF0A";
  try {
     long number2 = Int64.Parse(string2,
                                System.Globalization.NumberStyles.HexNumber);
     Console.WriteLine(number2);
  }
  catch (OverflowException) {
     Console.WriteLine($"'{string2}' is out of range of a 64-bit integer.");
  }
  catch (FormatException) {
     Console.WriteLine($"The format of '{string2}' is invalid.");
  }
  // The example displays the following output:
  //    244681903147
  //    67012198154
  

  let string1 = "244681903147"
  try
      let number1 = Int64.Parse string1
      printfn $"{number1}"
  with
  | :? OverflowException ->
      printfn $"'{string1}' is out of range of a 64-bit integer."
  | :? FormatException ->
      printfn $"The format of '{string1}' is invalid."
  
  let string2 = "F9A3CFF0A"
  try
      let number2 = Int64.Parse(string2, NumberStyles.HexNumber)
      printfn $"{number2}"
  
  with
  | :? OverflowException ->
      printfn $"'{string2}' is out of range of a 64-bit integer."
  | :? FormatException ->
      printfn $"The format of '{string2}' is invalid."
  
  // The example displays the following output:
  //    244681903147
  //    67012198154
  

  Dim string1 As String = "244681903147"
  Try
     Dim number1 As Long = Int64.Parse(string1)
     Console.WriteLine(number1)
  Catch e As OverflowException
     Console.WriteLine("'{0}' is out of range of a 64-bit integer.", string1)
  Catch e As FormatException
     Console.WriteLine("The format of '{0}' is invalid.", string1)
  End Try
  
  Dim string2 As String = "F9A3CFF0A"
  Try
     Dim number2 As Long = Int64.Parse(string2,
                              System.Globalization.NumberStyles.HexNumber)
     Console.WriteLine(number2)
  Catch e As OverflowException
     Console.WriteLine("'{0}' is out of range of a 64-bit integer.", string2)
  Catch e As FormatException
     Console.WriteLine("The format of '{0}' is invalid.", string2)
  End Try
  ' The example displays the following output:
  '    244681903147
  '    67012198154
  

对 Int64 值执行操作

该 Int64 类型支持标准数学运算，例如加法、减法、除法、乘法、求反和一元求反。 与其他整型类型一样，该 Int64 类型还支持按位 AND、OR、XOR、左移和右移运算符。

可以使用标准数值运算符比较两个 Int64 值，也可以调用 CompareTo 或 Equals 方法。

还可以调用类的成员 Math 来执行各种数值运算，包括获取数字的绝对值、计算积分除法的商和余数、确定两个长整数的最大值或最小值、获取数字的符号以及舍入数字。

将 Int64 表示为字符串

该 Int64 类型为标准和自定义数字格式字符串提供完全支持。 （有关详细信息，请参阅 格式类型、 标准数字格式字符串和 自定义数字格式字符串。

若要将 Int64 值格式化为无前导零的整型字符串，可以调用无 ToString() 参数方法。 通过使用“D”格式说明符，还可以在字符串表示形式中包含指定数量的前导零。 通过使用“N”格式说明符，可以包括组分隔符，并指定要显示在数字的字符串表示形式的十进制数字数。 通过使用“X”格式说明符，可以将值 Int64 表示为十六进制字符串。 以下示例采用以下四种方式设置值数组 Int64 中的元素的格式。

long[] numbers = { -1403, 0, 169, 1483104 };
foreach (var number in numbers)
{
    // Display value using default formatting.
    Console.Write("{0,-8}  -->   ", number.ToString());
    // Display value with 3 digits and leading zeros.
    Console.Write("{0,8:D3}", number);
    // Display value with 1 decimal digit.
    Console.Write("{0,13:N1}", number);
    // Display value as hexadecimal.
    Console.Write("{0,18:X2}", number);
    // Display value with eight hexadecimal digits.
    Console.WriteLine("{0,18:X8}", number);
}
// The example displays the following output:
//    -1403     -->      -1403     -1,403.0  FFFFFFFFFFFFFA85  FFFFFFFFFFFFFA85
//    0         -->        000          0.0                00          00000000
//    169       -->        169        169.0                A9          000000A9
//    1483104   -->    1483104  1,483,104.0            16A160          0016A160

let numbers = [| -1403L; 0L; 169L; 1483104L |]
for number in numbers do
    // Display value using default formatting.
    printf $"{number.ToString(),-8}  -->   "
    // Display value with 3 digits and leading zeros.
    printf $"{number,8:D3}"
    // Display value with 1 decimal digit.
    printf $"{number,13:N1}"
    // Display value as hexadecimal.
    printf $"{number,18:X2}"
    // Display value with eight hexadecimal digits.
    printfn $"{number,18:X8}"

// The example displays the following output:
//    -1403     -->      -1403     -1,403.0  FFFFFFFFFFFFFA85  FFFFFFFFFFFFFA85
//    0         -->        000          0.0                00          00000000
//    169       -->        169        169.0                A9          000000A9
//    1483104   -->    1483104  1,483,104.0            16A160          0016A160

Dim numbers() As Long = { -1403, 0, 169, 1483104 }
For Each number In numbers
   ' Display value using default formatting.
   Console.Write("{0,-8}  -->   ", number.ToString())
   ' Display value with 3 digits and leading zeros.
   Console.Write("{0,8:D3}", number)
   ' Display value with 1 decimal digit.
   Console.Write("{0,13:N1}", number) 
   ' Display value as hexadecimal.
   Console.Write("{0,18:X2}", number)
   ' Display value with eight hexadecimal digits.
   Console.WriteLine("{0,18:X8}", number)
Next   
' The example displays the following output:
'    -1403     -->      -1403     -1,403.0  FFFFFFFFFFFFFA85  FFFFFFFFFFFFFA85
'    0         -->        000          0.0                00          00000000
'    169       -->        169        169.0                A9          000000A9
'    1483104   -->    1483104  1,483,104.0            16A160          0016A160

还可以通过调用Int64方法并提供基作为方法的第二个参数，将值格式化ToString(Int64, Int32)为二进制、八进制、十六进制或十六进制字符串。 以下示例调用此方法以显示整数值的数组的二进制、八进制和十六进制表示形式。

long[] numbers = { -146, 11043, 2781913 };
foreach (var number in numbers)
{
    Console.WriteLine($"{number} (Base 10):");
    Console.WriteLine($"   Binary:  {Convert.ToString(number, 2)}");
    Console.WriteLine($"   Octal:   {Convert.ToString(number, 8)}");
    Console.WriteLine($"   Hex:     {Convert.ToString(number, 16)}{Environment.NewLine}");
}
// The example displays the following output:
//    -146 (Base 10):
//       Binary:  1111111111111111111111111111111111111111111111111111111101101110
//       Octal:   1777777777777777777556
//       Hex:     ffffffffffffff6e
//
//    11043 (Base 10):
//       Binary:  10101100100011
//       Octal:   25443
//       Hex:     2b23
//
//    2781913 (Base 10):
//       Binary:  1010100111001011011001
//       Octal:   12471331
//       Hex:     2a72d9

let numbers = [| -146L; 11043L; 2781913L |]
for number in numbers do
    printfn $"{number} (Base 10):"
    printfn $"   Binary:  {Convert.ToString(number, 2)}"
    printfn $"   Octal:   {Convert.ToString(number, 8)}"
    printfn $"   Hex:     {Convert.ToString(number, 16)}\n"

// The example displays the following output:
//    -146 (Base 10):
//       Binary:  1111111111111111111111111111111111111111111111111111111101101110
//       Octal:   1777777777777777777556
//       Hex:     ffffffffffffff6e
//
//    11043 (Base 10):
//       Binary:  10101100100011
//       Octal:   25443
//       Hex:     2b23
//
//    2781913 (Base 10):
//       Binary:  1010100111001011011001
//       Octal:   12471331
//       Hex:     2a72d9

Dim numbers() As Long = { -146, 11043, 2781913 }
For Each number In numbers
   Console.WriteLine("{0} (Base 10):", number)
   Console.WriteLine("   Binary:  {0}", Convert.ToString(number, 2))
   Console.WriteLine("   Octal:   {0}", Convert.ToString(number, 8))
   Console.WriteLine("   Hex:     {0}", Convert.ToString(number, 16))
   Console.WriteLine()
Next      
' The example displays the following output:
'    -146 (Base 10):
'       Binary:  1111111111111111111111111111111111111111111111111111111101101110
'       Octal:   1777777777777777777556
'       Hex:     ffffffffffffff6e
'
'    11043 (Base 10):
'       Binary:  10101100100011
'       Octal:   25443
'       Hex:     2b23
'
'    2781913 (Base 10):
'       Binary:  1010100111001011011001
'       Octal:   12471331
'       Hex:     2a72d9

使用非十进制 64 位整数值进行操作

除了将单个长整数用作十进制值之外，你可能还希望执行按位运算或处理长整数值的二进制或十六进制表示形式。 Int64 值以 63 位表示，第 64 位用作符号位。 正值使用符号和数量级表示形式表示。 负值采用二进制补码表示形式。 在对 Int64 值执行按位作或处理单个位时，请务必记住这一点。 若要对任何两个非十进制值执行数值、布尔或比较运算，这两个值都必须使用相同的表示形式。

线程安全性

此类型的所有成员都是线程安全的。 似乎修改实例状态的成员实际上返回使用新值初始化的新实例。 与任何其他类型一样，读取和写入包含此类型的实例的共享变量必须受到锁的保护，以确保线程安全。

另请参阅

• UInt64
• 示例：.NET Core WinForms 格式设置实用工具 （C#）
• 示例：.NET Core WinForms 格式设置实用工具 （Visual Basic）