VB.net不會閱讀文本文件正確

Question

我一直在嘗試使用StreamReader讀取日誌文件。我無法驗證它是什麼編碼，因爲當我在記事本+ +中打開它，並選擇ANSI編碼，我得到這樣的結果：

我得到使用ANSI時所需的字符，但它後跟之類的東西[NULL] [EOT] [SOH] [NUL] [SI]

當我嘗試和讀取VB中的文件（使用StreamReader或ReadAll）與選擇的結果字符串我回來ANSI編碼是完全錯誤的。

我怎麼能讀VB.net這樣的文件嗎？

Answer 1

你可以使用IO.File.ReadAllText("File Location", encoding as System.Text.Encoding)方法，

Dim textFromFile as string = IO.File.ReadAllText("C:\Users\Jason\Desktop\login20130417.rdb", System.Text.Encoding.ASCII) 'Or Unicode, UFT32, UFT8, UFT7, BigEndianUnicode or default. Default is ANSI. 

如果你還沒有得到你需要使用默認編碼（ANSI）的文本，那麼你可以嘗試其他6種不同的編碼方法。

更新...

看來，你的文件已損壞，使用下面的代碼我能得到什麼的是文件中的二進制表示，我得到這個，

11111111111111010000011100000100000000000000010100000000000100110000000000001000000000000001111000000000001001100000000000111000000000100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001111111111111101000001110000010000000000000001010000000000010011000000000000100000000000000111100000000000101000000000001111111111111101000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001100111000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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

大量的空數據表明文件已損壞，這也解釋了爲什麼我們每次嘗試讀取文件時都無法獲取大量數據。

的代碼，

Dim fileData As String = IO.File.ReadAllText("C:\Users\Jason\Desktop\login20130417.rdb") 
Dim i As Integer = 0 
Dim binaryData As String = "" 
Dim ch As String = "" 
Do Until i = fileData.Length 
    ch = fileData.Chars(i) 
    bin = bin & System.Convert.ToString(AscW(ch), 2).PadLeft(8, "0") 
    i = i + 1 
Loop 

Answer 2

由於@Daniel A.懷特在他的評論暗示，該文件似乎並沒有被編碼像一個「正常」的文本文件。在這種情況下，StreamReader將不起作用。我會嘗試使用BinaryReader。

Answer 3

Rdb文件？從來沒有聽說過。快速谷歌使得它不太清楚 - N64數據庫文件，Darkbot等..

但是考慮到你的名字，以及打開的文件的一般看，我會說，它的二進制文件。

如果你想閱讀vb.net中的文件，你需要一個排序庫，我不能幫你一個，直到你能夠闡明文件可能是什麼，或什麼是什麼它是用來創建的。