vb.net二进制转进制 vbs 二进制文件读写
vb.net 中2、8、10、16进制转换代码怎么写
Option Explicit
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Dim Jz As Integer, K As Boolean
Private Sub Command1_Click()
Pic.Cls
If K Then Jz = Val(Qtjz.Text)
If Pd(Text1.Text, Jz) Then Pic.Print "选择的进制与数不符": Exit Sub
If Jz = 0 Then Pic.Print "请先输入进制" Else Pic.Print Zh(Text1.Text, Jz)
End Sub
Private Sub Command2_Click()
End
End Sub
Private Sub Frame1_DragDrop(Source As Control, X As Single, Y As Single)
End Sub
Private Sub Option1_Click(Index As Integer)
K = False
Select Case Index
Case 0
Jz = 2
Case 1
Jz = 8
Case 2
Jz = 10
Case 3
Jz = 16
Case 4
K = True
Qtjz.Text = ""
Qtjz.SetFocus
End Select
If Index 4 Then Command1.SetFocus
End Sub
Private Sub Qtjz_Click()
Qtjz.Text = ""
End Sub
Private Sub Text1_Click()
Text1.Text = ""
End Sub
Private Function Zh(a As String, b As Integer) As Integer
Dim c As String, i, d As Integer
a = LCase(a)
For i = 1 To Len(a)
c = Mid(a, Len(a) + 1 - i, 1)
If Asc(c) 96 Then d = Asc(c) - 87 Else d = Val(c)
Zh = Zh + d * b ^ (i - 1)
Next i
End Function
Private Function Pd(a As String, b As Integer) As Boolean
Dim c As String, i, d As Integer
Pd = False
For i = 1 To Len(a)
c = Mid(a, Len(a) + 1 - i, 1)
If Asc(c) 96 Then d = Asc(c) - 87 Else d = Val(c)
If d b - 1 Then Pd = True: Exit Function
Next i
End Function
vb.net 二进制读取文件
VB.NET打开二进制文件用fileopen完成，打开二进制文件的形式为：openmode.binary
读取二进制文件用的是fileget方法，写入二进制文件用的是fileput方法。
应用示例：将一批随机数保存在一个dat文件中，然后再将其提取到文本框中。
二进制文件的读写一批随机数的存取，程序为：
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim x, i, fn As Integer
Dim s As String = ""
fn = FreeFile()
FileOpen(fn, "d:\data.dat", OpenMode.Binary)
For i = 1 To 8
x = Int(Rnd() * 100)
s = s + Str(x)
FilePut(fn, x)
Next
FileClose(fn)
TextBox1.Text = s
End Sub
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim x, fn As Integer
Dim s As String = ""
fn = FreeFile()
FileOpen(fn, "d:\data.dat", OpenMode.Binary)
Do While Not EOF(fn)
FileGet(fn, x)
s = s + Str(x) + " "
Loop
FileClose(fn)
TextBox1.Text = s
End Sub
用VB.NET将二进制数转换为十进制数
.NET 程序写成你这样也算厉害了，好好看看下面的代码
Sub Main()
Console.WriteLine("请输入一个二进制数")
Console.WriteLine(bin2int(Console.ReadLine()))
Console.ReadKey()
End Sub
Function bin2int(ByVal bin As String) As Integer
Dim i As Long
For i = 1 To bin.Length
bin2int = bin2int * 2 + Val(Mid(bin, i, 1))
Next i
End Function
vb.net 将文件转化成二进制
首先引入System.IO命名空间
Imports System.IO
然后使用文件流来读入数组：
Dim bytes() As Byte
Using fs As New FileStream(文件路径,FileMode.Open)
ReDim bytes(fs.Length-1)
fs.Read(bytes,0,fs.Length)
fs.Close()
End Using
这样bytes就是整个文件的所有字节了
从字节生成Image：
Dim img As Image = Image.FromStream(New MemoryStream(bytes))
img就是图片了
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