包含vb.net写入txt的词条

请教在VB.net中如何将数据写入txt文件、再从txt文件读出？

软糖来告诉你吧。

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VB.net中读写文件主要使用System.IO命名空间。

① 使用 File.ReadAllText 读取

Dim s As String = System.IO.File.ReadAllText("C:\a.txt")

② 使用 StreamReader 读取，注意编码格式和写入的编码保持一致。

Dim sr As StreamReader = New StreamReader("C:\a.txt", System.Text.Encoding.UTF8)

Dim s As String = sr.ReadToEnd()

sr.Close()

③ 使用 File.WriteAllText 写入，会覆盖同名的文件。

Dim 要写的内容 As String = ""

File.WriteAllText(文件路径, 要写的内容, System.Text.Encoding.UTF8)

④ 使用 StreamWriter 写入。

Dim sw As System.IO.StreamWriter = New System.IO.StreamWriter("C:\a.txt", False, System.Text.Encoding.UTF8)

sw.WriteLine(TextTB.Text)

sw.Close()

⑤ 使用 StreamWriter 追加写入。

将上面代码的第二个参数False改为True。

◆ 满意请采纳，谢谢 ◆

vb.net 将“1111”写入TXT文件中

If SaveFileDialog1.ShowDialog = Windows.Forms.DialogResult.OK Then

My.Computer.FileSystem.WriteAllText(SaveFileDialog1.FileName, "1111", True)

End If

就可以了

vb.net中，读取和写入文件

写入：Dim sr As New IO.StreamWriter(Application.StartupPath "/写入的文本.txt")

sr.WriteLine("写入的内容") sr.Close()读取：If (File.Exists(Application.StartupPath "/msg.txt")) Then

Dim fm As New IO.FileStream(Application.StartupPath "/读取的文本.txt", FileMode.Open)

Dim sr As IO.StreamReader = New IO.StreamReader(fm)

Do While sr.Peek() = 0

TextBox1.Text = sr.ReadLine() （读取文本到文本框）

Loop end if

vb.net读写txt文件的问题

这个用读写TXT的话比较繁琐，建议题主使用读写INI的方式，参考：

'声明INI配置文件读写API函数

Private Declare Function GetPrivateProfileString Lib "kernel32" Alias "GetPrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpDefault As String, ByVal lpReturnedString As String, ByVal nSize As Int32, ByVal lpFileName As String) As Int32

Private Declare Function WritePrivateProfileString Lib "kernel32" Alias "WritePrivateProfileStringA" (ByVal lpApplicationName As String, ByVal lpKeyName As String, ByVal lpString As String, ByVal lpFileName As String) As Int32

'定义读取配置文件函数

Public Function GetINI(ByVal Section As String, ByVal AppName As String, ByVal lpDefault As String, ByVal FileName As String) As String

Dim Str As String = LSet(Str, 256)

GetPrivateProfileString(Section, AppName, lpDefault, Str, Len(Str), FileName)

Return Microsoft.VisualBasic.Left(Str, InStr(Str, Chr(0)) - 1)

End Function

'定义写入配置文件函数

Public Function WriteINI(ByVal Section As String, ByVal AppName As String, ByVal lpDefault As String, ByVal FileName As String) As Long

WriteINI = WritePrivateProfileString(Section, AppName, lpDefault, FileName)

End Function

'定义INI文件位置

Dim path As String

path = "C:\t861239263.ini" '假设是这个文件

那么读取的时候：

TextBox1.Text = GetINI("main","v1","", path)

TextBox2.Text = GetINI("main","v2","", path)

TextBox3.Text = GetINI("main","v3","", path)

写入的时候：

WriteINI("main","v1", TextBox1.Text, path)

WriteINI("main","v2", TextBox2.Text, path)

WriteINI("main","v3", TextBox3.Text, path)

【附】INI文件的格式，范例：

[main]

v1=133233

v2=132387

v3=322333

[aaa]

abc=1

bcd=2

[bbb]

ni=wo

wo=ta

vb.net 中对txt文件的读取、写入的方法！始终保持txt里面只有一行！

Public Class Form1

Private Sub 写入文件_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 写入文件.Click

FileOpen(1, "D:\一行文件.txt", OpenMode.Output) ' Open file for output.

WriteLine(1, "想只保留文件为一行那你就写一行好了") ' Print blank line to file.

FileClose(1) ' Close file.

End Sub

Private Sub 读取文件_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles 读取文件.Click

Dim TextLine As String

FileOpen(1, "D:\一行文件.txt", OpenMode.Input) ' Open file for output.

TextLine = LineInput(1) '读取一行就了

MsgBox(TextLine)

FileClose(1)

End Sub

End Class

最简单的方法还有很多方法自己研究吧亲希望能帮到你