BitConverter.ToSingle メソッド
アセンブリ: mscorlib (mscorlib.dll 内)

Dim value As Byte() Dim startIndex As Integer Dim returnValue As Single returnValue = BitConverter.ToSingle(value, startIndex)
戻り値
startIndex から始まる 4 バイトで構成される単精度浮動小数点数。


ToSingle メソッドを使用して、Byte 配列の要素を Single 値に変換するコード例を次に示します。
' Example of the BitConverter.ToSingle method. Imports System Imports Microsoft.VisualBasic Module BytesToSingleDemo Const formatter As String = "{0,5}{1,17}{2,18:E7}" ' Convert four Byte array elements to a Single and display it. Sub BAToSingle( bytes( ) As Byte, index As Integer ) Dim value As Single = BitConverter.ToSingle( bytes, index ) Console.WriteLine( formatter, index, _ BitConverter.ToString( bytes, index, 4 ), value ) End Sub ' Display a Byte array, using multiple lines if necessary. Sub WriteMultiLineByteArray( bytes( ) As Byte ) Const rowSize As Integer = 20 Dim iter As Integer Console.WriteLine( "initial Byte array" ) Console.WriteLine( "------------------" ) For iter = 0 To bytes.Length - rowSize - 1 Step rowSize Console.Write( _ BitConverter.ToString( bytes, iter, rowSize ) ) Console.WriteLine( "-" ) Next iter Console.WriteLine( BitConverter.ToString( bytes, iter ) ) Console.WriteLine( ) End Sub Sub Main( ) Dim byteArray as Byte( ) = { _ 0, 0, 0, 0, 128, 63, 0, 0, 112, 65, _ 0, 255, 127, 71, 0, 0, 128, 59, 0, 0, _ 128, 47, 73, 70, 131, 5, 75, 6, 158, 63, _ 77, 6, 158, 63, 80, 6, 158, 63, 30, 55, _ 190, 121, 255, 255, 127, 255, 255, 127, 127, 1, _ 0, 0, 0, 192, 255, 0, 0, 128, 255, 0, _ 0, 128, 127 } Console.WriteLine( _ "This example of the BitConverter.ToSingle( Byte( ), " & _ "Integer ) " & vbCrLf & "method generates the " & _ "following output. It converts elements " & vbCrLf & _ "of a Byte array to Single values." & vbCrLf ) WriteMultiLineByteArray( byteArray ) Console.WriteLine( formatter, "index", "array elements", _ "Single" ) Console.WriteLine( formatter, "-----", "--------------", _ "------" ) ' Convert Byte array elements to Single values. BAToSingle( byteArray, 0 ) BAToSingle( byteArray, 2 ) BAToSingle( byteArray, 6 ) BAToSingle( byteArray, 10 ) BAToSingle( byteArray, 14 ) BAToSingle( byteArray, 18 ) BAToSingle( byteArray, 22 ) BAToSingle( byteArray, 26 ) BAToSingle( byteArray, 30 ) BAToSingle( byteArray, 34 ) BAToSingle( byteArray, 38 ) BAToSingle( byteArray, 42 ) BAToSingle( byteArray, 45 ) BAToSingle( byteArray, 49 ) BAToSingle( byteArray, 51 ) BAToSingle( byteArray, 55 ) BAToSingle( byteArray, 59 ) End Sub End Module ' This example of the BitConverter.ToSingle( Byte( ), Integer ) ' method generates the following output. It converts elements ' of a Byte array to Single values. ' ' initial Byte array ' ------------------ ' 00-00-00-00-80-3F-00-00-70-41-00-FF-7F-47-00-00-80-3B-00-00- ' 80-2F-49-46-83-05-4B-06-9E-3F-4D-06-9E-3F-50-06-9E-3F-1E-37- ' BE-79-FF-FF-7F-FF-FF-7F-7F-01-00-00-00-C0-FF-00-00-80-FF-00- ' 00-80-7F ' ' index array elements Single ' ----- -------------- ------ ' 0 00-00-00-00 0.0000000E+000 ' 2 00-00-80-3F 1.0000000E+000 ' 6 00-00-70-41 1.5000000E+001 ' 10 00-FF-7F-47 6.5535000E+004 ' 14 00-00-80-3B 3.9062500E-003 ' 18 00-00-80-2F 2.3283064E-010 ' 22 49-46-83-05 1.2345000E-035 ' 26 4B-06-9E-3F 1.2345671E+000 ' 30 4D-06-9E-3F 1.2345673E+000 ' 34 50-06-9E-3F 1.2345676E+000 ' 38 1E-37-BE-79 1.2345679E+035 ' 42 FF-FF-7F-FF -3.4028235E+038 ' 45 FF-FF-7F-7F 3.4028235E+038 ' 49 01-00-00-00 1.4012985E-045 ' 51 00-00-C0-FF NaN ' 55 00-00-80-FF -Infinity ' 59 00-00-80-7F Infinity
// Example of the BitConverter.ToSingle method. using System; class BytesToSingleDemo { const string formatter = "{0,5}{1 ,17}{2,18:E7}"; // Convert four byte array elements to a float and display it. public static void BAToSingle( byte[ ] bytes, int index ) { float value = BitConverter.ToSingle( bytes, index ); Console.WriteLine( formatter, index, BitConverter.ToString( bytes, index, 4 ), value ); } // Display a byte array, using multiple lines if necessary. public static void WriteMultiLineByteArray( byte[ ] bytes ) { const int rowSize = 20; int iter; Console.WriteLine( "initial byte array" ); Console.WriteLine( "------------------" ); for( iter = 0; iter < bytes.Length - rowSize; iter += rowSize ) { Console.Write( BitConverter.ToString( bytes, iter, rowSize ) ); Console.WriteLine( "-" ); } Console.WriteLine( BitConverter.ToString( bytes, iter ) ); Console.WriteLine( ); } public static void Main( ) { byte[ ] byteArray = { 0, 0, 0, 0, 128, 63, 0, 0, 112, 65, 0, 255, 127, 71, 0, 0, 128, 59, 0, 0, 128, 47, 73, 70, 131, 5, 75, 6, 158, 63, 77, 6, 158, 63, 80, 6, 158, 63, 30, 55, 190, 121, 255, 255, 127, 255, 255, 127, 127, 1, 0, 0, 0, 192, 255, 0, 0, 128, 255, 0, 0, 128, 127 }; Console.WriteLine( "This example of the BitConverter.ToSingle( byte( ), " + "int ) \nmethod generates the following output. It " + "converts elements \nof a byte array to float values.\n" ); WriteMultiLineByteArray( byteArray ); Console.WriteLine( formatter, "index", "array elements", "float" ); Console.WriteLine( formatter, "-----", "--------------", "-----" ); // Convert byte array elements to float values. BAToSingle( byteArray, 0 ); BAToSingle( byteArray, 2 ); BAToSingle( byteArray, 6 ); BAToSingle( byteArray, 10 ); BAToSingle( byteArray, 14 ); BAToSingle( byteArray, 18 ); BAToSingle( byteArray, 22 ); BAToSingle( byteArray, 26 ); BAToSingle( byteArray, 30 ); BAToSingle( byteArray, 34 ); BAToSingle( byteArray, 38 ); BAToSingle( byteArray, 42 ); BAToSingle( byteArray, 45 ); BAToSingle( byteArray, 49 ); BAToSingle( byteArray, 51 ); BAToSingle( byteArray, 55 ); BAToSingle( byteArray, 59 ); } } /* This example of the BitConverter.ToSingle( byte( ), int ) method generates the following output. It converts elements of a byte array to float values. initial byte array ------------------ 00-00-00-00-80-3F-00-00-70-41-00-FF-7F-47-00-00-80-3B-00-00- 80-2F-49-46-83-05-4B-06-9E-3F-4D-06-9E-3F-50-06-9E-3F-1E-37- BE-79-FF-FF-7F-FF-FF-7F-7F-01-00-00-00-C0-FF-00-00-80-FF-00- 00-80-7F index array elements float ----- -------------- ----- 0 00-00-00-00 0.0000000E+000 2 00-00-80-3F 1.0000000E+000 6 00-00-70-41 1.5000000E+001 10 00-FF-7F-47 6.5535000E+004 14 00-00-80-3B 3.9062500E-003 18 00-00-80-2F 2.3283064E-010 22 49-46-83-05 1.2345000E-035 26 4B-06-9E-3F 1.2345671E+000 30 4D-06-9E-3F 1.2345673E+000 34 50-06-9E-3F 1.2345676E+000 38 1E-37-BE-79 1.2345679E+035 42 FF-FF-7F-FF -3.4028235E+038 45 FF-FF-7F-7F 3.4028235E+038 49 01-00-00-00 1.4012985E-045 51 00-00-C0-FF NaN 55 00-00-80-FF -Infinity 59 00-00-80-7F Infinity */
// Example of the BitConverter::ToSingle method. using namespace System; // Convert four byte array elements to a float and display it. void BAToSingle( array<unsigned char>^bytes, int index ) { float value = BitConverter::ToSingle( bytes, index ); Console::WriteLine( "{0,5}{1,17}{2,18:E7}", index, BitConverter::ToString( bytes, index, 4 ), value ); } // Display a byte array, using multiple lines if necessary. void WriteMultiLineByteArray( array<unsigned char>^bytes ) { const int rowSize = 20; int iter; Console::WriteLine( "initial unsigned char array" ); Console::WriteLine( "---------------------------" ); for ( iter = 0; iter < bytes->Length - rowSize; iter += rowSize ) { Console::Write( BitConverter::ToString( bytes, iter, rowSize ) ); Console::WriteLine( "-" ); } Console::WriteLine( BitConverter::ToString( bytes, iter ) ); Console::WriteLine(); } int main() { array<unsigned char>^byteArray = {0,0,0,0,128,63,0,0 ,112,65,0,255,127,71,0,0,128,59,0,0,128,47,73,70,131,5,75,6,158,63,77,6,158,63,80 ,6,158,63,30,55,190,121,255,255,127,255,255,127,127,1,0,0,0,192,255,0,0,128,255,0,0,128,127}; Console::WriteLine( "This example of the BitConverter::ToSingle( unsigned " "char[ ], int ) \nmethod generates the following output. It " "converts elements of a \nbyte array to float values.\n" ); WriteMultiLineByteArray( byteArray ); Console::WriteLine( "{0,5}{1,17}{2,18:E7}", "index", "array elements", "float" ); Console::WriteLine( "{0,5}{1,17}{2,18:E7}", "-----", "--------------", "-----" ); // Convert byte array elements to float values. BAToSingle( byteArray, 0 ); BAToSingle( byteArray, 2 ); BAToSingle( byteArray, 6 ); BAToSingle( byteArray, 10 ); BAToSingle( byteArray, 14 ); BAToSingle( byteArray, 18 ); BAToSingle( byteArray, 22 ); BAToSingle( byteArray, 26 ); BAToSingle( byteArray, 30 ); BAToSingle( byteArray, 34 ); BAToSingle( byteArray, 38 ); BAToSingle( byteArray, 42 ); BAToSingle( byteArray, 45 ); BAToSingle( byteArray, 49 ); BAToSingle( byteArray, 51 ); BAToSingle( byteArray, 55 ); BAToSingle( byteArray, 59 ); } /* This example of the BitConverter::ToSingle( unsigned char[ ], int ) method generates the following output. It converts elements of a byte array to float values. initial unsigned char array --------------------------- 00-00-00-00-80-3F-00-00-70-41-00-FF-7F-47-00-00-80-3B-00-00- 80-2F-49-46-83-05-4B-06-9E-3F-4D-06-9E-3F-50-06-9E-3F-1E-37- BE-79-FF-FF-7F-FF-FF-7F-7F-01-00-00-00-C0-FF-00-00-80-FF-00- 00-80-7F index array elements float ----- -------------- ----- 0 00-00-00-00 0.0000000E+000 2 00-00-80-3F 1.0000000E+000 6 00-00-70-41 1.5000000E+001 10 00-FF-7F-47 6.5535000E+004 14 00-00-80-3B 3.9062500E-003 18 00-00-80-2F 2.3283064E-010 22 49-46-83-05 1.2345000E-035 26 4B-06-9E-3F 1.2345671E+000 30 4D-06-9E-3F 1.2345673E+000 34 50-06-9E-3F 1.2345676E+000 38 1E-37-BE-79 1.2345679E+035 42 FF-FF-7F-FF -3.4028235E+038 45 FF-FF-7F-7F 3.4028235E+038 49 01-00-00-00 1.4012985E-045 51 00-00-C0-FF NaN 55 00-00-80-FF -Infinity 59 00-00-80-7F Infinity */
// Example of the BitConverter.ToSingle method. import System.*; class BytesToSingleDemo { private static String formatter = "{0 ,5}{1,17}{2,18:E7}"; // Convert four byte array elements to a float and display it. public static void BAToSingle(ubyte bytes[], int index) { float value = BitConverter.ToSingle(bytes, index); Console.WriteLine(formatter, (Int32)index, BitConverter.ToString(bytes, index, 4), (Single)value); } //BAToSingle // Display a byte array, using multiple lines if necessary. public static void WriteMultiLineByteArray(ubyte bytes[]) { final int rowSize = 20; int iter; Console.WriteLine("initial byte array"); Console.WriteLine("------------------"); for (iter = 0; iter < bytes.length - rowSize; iter+=rowSize) { Console.Write(BitConverter.ToString(bytes, iter, rowSize)); Console.WriteLine("-"); } Console.WriteLine(BitConverter.ToString(bytes, iter)); Console.WriteLine(); } //WriteMultiLineByteArray public static void main(String[] args) { ubyte byteArray[] = { 0, 0, 0, 0, 128, 63, 0, 0, 112, 65, 0, 255, 127, 71, 0, 0, 128, 59, 0, 0, 128, 47, 73, 70, 131, 5, 75, 6, 158, 63, 77, 6, 158, 63, 80, 6, 158, 63, 30, 55, 190, 121, 255, 255, 127, 255, 255, 127, 127, 1, 0, 0, 0, 192, 255, 0, 0, 128, 255, 0, 0, 128, 127 }; Console.WriteLine("This example of the " + "BitConverter.ToSingle( byte( ), int ) \n" + "method generates the following output. " + "It converts elements \nof a byte array to float values.\n"); WriteMultiLineByteArray(byteArray); Console.WriteLine(formatter, "index", "array elements", "float"); Console.WriteLine(formatter, "-----", "--------------", "-----"); // Convert byte array elements to float values. BAToSingle(byteArray, 0); BAToSingle(byteArray, 2); BAToSingle(byteArray, 6); BAToSingle(byteArray, 10); BAToSingle(byteArray, 14); BAToSingle(byteArray, 18); BAToSingle(byteArray, 22); BAToSingle(byteArray, 26); BAToSingle(byteArray, 30); BAToSingle(byteArray, 34); BAToSingle(byteArray, 38); BAToSingle(byteArray, 42); BAToSingle(byteArray, 45); BAToSingle(byteArray, 49); BAToSingle(byteArray, 51); BAToSingle(byteArray, 55); BAToSingle(byteArray, 59); } //main } //BytesToSingleDemo /* This example of the BitConverter.ToSingle( byte( ), int ) method generates the following output. It converts elements of a byte array to float values. initial byte array ------------------ 00-00-00-00-80-3F-00-00-70-41-00-FF-7F-47-00-00-80-3B-00-00- 80-2F-49-46-83-05-4B-06-9E-3F-4D-06-9E-3F-50-06-9E-3F-1E-37- BE-79-FF-FF-7F-FF-FF-7F-7F-01-00-00-00-C0-FF-00-00-80-FF-00- 00-80-7F index array elements float ----- -------------- ----- 0 00-00-00-00 0.0000000E+000 2 00-00-80-3F 1.0000000E+000 6 00-00-70-41 1.5000000E+001 10 00-FF-7F-47 6.5535000E+004 14 00-00-80-3B 3.9062500E-003 18 00-00-80-2F 2.3283064E-010 22 49-46-83-05 1.2345000E-035 26 4B-06-9E-3F 1.2345671E+000 30 4D-06-9E-3F 1.2345673E+000 34 50-06-9E-3F 1.2345676E+000 38 1E-37-BE-79 1.2345679E+035 42 FF-FF-7F-FF -3.4028235E+038 45 FF-FF-7F-7F 3.4028235E+038 49 01-00-00-00 1.4012985E-045 51 00-00-C0-FF NaN 55 00-00-80-FF -Infinity 59 00-00-80-7F Infinity */

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