vb.net 字符串，16进制间转换(求代码)

把字符串“12341168C5B7”转换为16进制数存为string型

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用shuzi=Convert.ToInt32("12341168C5B7",16)

就ok了。

反之用 shuzi.ToString("X")就行了。

给分！！！

12341168C5B7转换成10进制数就是20014839678391。。

而int32的最大值为2,147,483,647。。所以产生错误。

所以要用int64，它的最大值为9,223,372,036,854,775,807。也就是16位十六进制数0X7FFFFFFFFFFFFFFF。

难道还有比F靠后的数？？？？？？

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

vb.net 中2、8、10、16进制转换代码怎么写

Option Explicit

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 图片转换二进制代码

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

Dim MyStream As New System.IO.MemoryStream

Me.PictureBox1.Image.Save(MyStream, System.Drawing.Imaging.ImageFormat.Jpeg)

Dim MyBytes(MyStream.Length) As Byte

MyStream.Read(MyBytes, 0, MyStream.Length)

MyStream.Close()

Dim strText As String

strText = BitConverter.ToString(MyBytes)

Me.TextBox1.Text = strText

End Sub

vb.net 如何将十六进制字符串转换为十六进制变量

numHex =Integer.Parse(strHex, Globalization.NumberStyles.AllowHexSpecifier)

或

numHex = Integer. Parse("H" strHex)

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

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