date是一個(gè)類型。。。似乎不能賦值吧
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由Sting轉(zhuǎn)換成 Integer 可以這樣寫
dim a as string="adasdfsdfsferqwer"
dim b as integer
b= CUInt(a)
語(yǔ)法是正確的。。。但你要是把 幾個(gè)字符轉(zhuǎn)硬轉(zhuǎn)換為 數(shù)字整型 但這幾個(gè)字符串又不是數(shù)子 一定要出錯(cuò)的
如果是下面就沒(méi)錯(cuò)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(',')這個(gè)地方逗號(hào)是全角還是半角的按照你文本內(nèi)容里面的來(lái)
字符編碼轉(zhuǎn)換嗎?
1.字符與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u(píng)nicode編碼存儲(chǔ)的
endIndex = x.Length - 1
For i = startIndex To endIndex
ret_GBKEncode = "%" Hex(x(i))
Next
Return ret_GBKEncode
End Function
'GBK解碼
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
'轉(zhuǎn)化為字節(jié)碼
For i As Integer = 1 To n
sBytes(i - 1) = CByte("H" sInput.Substring(2 * i - 2, 2))
Next
'將字節(jié)碼轉(zhuǎn)化為字符串
ret_GBKDecode = System.Text.Encoding.Default.GetString(sBytes)
Return ret_GBKDecode
End Function
2.Unicode字符串為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
'這里可以類推出好幾種。
1、首先在電腦中找到并打開(kāi)VB軟件,找到一句輸出的函數(shù)。
2、然后在其數(shù)組變量中,套上一個(gè)Str函數(shù)。
3、這里注意函數(shù)的關(guān)鍵字,是沒(méi)有區(qū)分大小寫的。
4、然后函數(shù)是可以多個(gè)嵌套使用。
5、最后點(diǎn)擊運(yùn)行按鈕,這樣就可以成功運(yùn)行測(cè)試,如下圖所示,轉(zhuǎn)換就完成了。
明白你的意思了,只要是字母都會(huì)轉(zhuǎn)換成數(shù)字,幫你寫好了("usernane"和 "pasward" 我這里寫成 "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
網(wǎng)站題目:vb.net字符轉(zhuǎn)數(shù)字 vb數(shù)字轉(zhuǎn)換成字符串
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