date是一个类型。。。似乎不能赋值吧
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由Sting转换成 Integer 可以这样写
dim a as string="adasdfsdfsferqwer"
dim b as integer
b= CUInt(a)
语法是正确的。。。但你要是把 几个字符转硬转换为 数字整型 但这几个字符串又不是数子 一定要出错的
如果是下面就没错了
dim a as string="45446464646"
dim b as integer
b= CUInt(a)
string str1 = "a=1.2,3.5,7.88";
var arr = (from s in str1.Split('=')[1].Split(',') where s.Trim() != "" select Convert.ToDouble(s)).ToArray();
Split(',')这个地方逗号是全角还是半角的按照你文本内容里面的来
字符编码转换吗?
1.字符与gb2312(gbk的子集):
Public Function GBKEncode(ByVal sInput As String) As String
Dim ret_GBKEncode As String = ""
Dim i As Integer
Dim startIndex As Integer = 0
Dim endIndex As Integer
Dim x() As Byte = System.Text.Encoding.Default.GetBytes(sInput) '字符以及字符串在vb2008中都是以unicode编码存储的
endIndex = x.Length - 1
For i = startIndex To endIndex
ret_GBKEncode = "%" Hex(x(i))
Next
Return ret_GBKEncode
End Function
'GBK解码
Public Function GBKDecode(ByVal sInput As String) As String
sInput = sInput.Replace("%", "")
Dim ret_GBKDecode As String = ""
Dim sLen As Integer = sInput.Length
Dim n As Integer = sLen \ 2
Dim sBytes(0 To n - 1) As Byte
'转化为字节码
For i As Integer = 1 To n
sBytes(i - 1) = CByte("H" sInput.Substring(2 * i - 2, 2))
Next
'将字节码转化为字符串
ret_GBKDecode = System.Text.Encoding.Default.GetString(sBytes)
Return ret_GBKDecode
End Function
2.Unicode字符串为UTF-8
Imports System.Text
Public Function StringAsUtf8Bytes(ByVal strData As String) As Byte()
Dim bytes() As Byte
bytes = Encoding.UTF8.GetBytes(strData)
Return bytes
End Function
'这里可以类推出好几种。
1、首先在电脑中找到并打开VB软件,找到一句输出的函数。
2、然后在其数组变量中,套上一个Str函数。
3、这里注意函数的关键字,是没有区分大小写的。
4、然后函数是可以多个嵌套使用。
5、最后点击运行按钮,这样就可以成功运行测试,如下图所示,转换就完成了。
明白你的意思了,只要是字母都会转换成数字,帮你写好了("usernane"和 "pasward" 我这里写成 "username" 和" password")
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim username, password As String
Dim temp As Long
Dim r As String = ""
Dim v As String = TextBox1.Text
For Each c In v.ToString
If IsNumeric(c) Then
r = c
Else
r = ((Asc(c) - 65).ToString("00"))
End If
Next
username = r
temp = username * 3 - 500
password = CStr(temp)
TextBox2.Text = password
End Sub