[求助]字符串转字节数组和DataRow集合比较请教蓝版谢谢 - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

最近在研究串口时，遇到几个问题：

1.字符串以某分割字符如何转字节数组

原成功操作代码

Dim b_sent() As Byte = {&H01,&H0F} '定义字节数组

Ports("COM3").Write(b_sent, 0, b_sent.length) '写入串口命令

如果需要转变成

Dim s As String = "&H01,&H0F"

目前是用

s = s.Replace("&H","")

Dim strAry() As String = s.Split(",")

Dim b_sent(strAry.Length-1) As Byte

For i As Integer = 0 To strAry.Length - 1

b_sent(i) = Byte.Parse(strAry(i), System.Globalization.NumberStyles.HexNumber)

Ports("COM3").Write(b_sent, 0, b_sent.length)

能否将s直接转换成字节数组b_sent() ，考虑过GetBytes(),不会套。

2. DataRow集合如何判断不同，翻看过其它帖子，没解决。

Dim drsa As List(of DataRow) = DataTables("数据库1").SQLSelect("列1 = true")

Dim drsb As List(of DataRow) = DataTables("数据库2").SQLSelect("列2 = true")

If drsa.count <> drsb.count Then

Output.Show("不同")

Else

For i As Integer = 0 To drsa.count-1

'If drsa(i) <> drsb(i) Then '提示出错，不能直接比较

' Output.Show("不同")

' End If

End If

1、直接转换即可

Dim s As String = "&H01,&H0F"

Dim ar() As String = s.Split(",")

For Each a As String In ar

Dim d As Byte = a

Output.Show(d & "," & Format(d,"x"))

2、datarow无法比较，请比较单元格的内容，比如

If drsa(i)("编号") <> drsb(i)("编号") Then

谢谢蓝版。

1.字符串转字节数组，是转字节数组，不是转字符数组。我的意思是将一段字符串，以某分割符，直接转成字节数组。所以再请教下。

Dim s As String = "&H01,&H0F"

Dim ar() As String = s.Split(",")

For Each a As String In ar

Dim d As Byte = a

Output.Show(d & "," & Format(d,"x")) '以16进制显示

如何执行 Ports("COM3").Write(字节数组, 0, 字节数组.length) ？并且字符串可能是"&H01,&H0F" 或 "01 0F" 或 "01-0F"，Split后，用Dim d As Byte = a不行

For Each a As String In ar

Dim d As Byte = a

Ports("COM3").Write(字节数组(d), 0, 字节数组(d).length) '不会转-_-!!

成功解决DataRow集合比较异同，十分感谢！

神啊，一个字符可以转换，一个数组也就一个遍历的事

Dim s As String = "&H01,&H0F"

Dim ar() As String = s.Split(",")

dim aa(ar.length-1) as byte

For i as integer = 0 to ar.length-1

aa(i) = ar(i)

谢谢蓝版，

，最近研究这个有点头晕脑涨，也是用了FOR,其实是想看能不能简单点，用其它转换命令，像下面一样，看能不能直接一行搞定的图片点击可在新窗口打开查看

，多了分割符号，转不过弯了。如

Dim txt As String = "你好"
Dim zj() As Byte = System.Text.Encoding.Default.GetBytes(txt)

主题：[求助]字符串转字节数组和DataRow集合比较请教蓝版谢谢