Question

我做了一些谷歌搜索，每个人都给了我相同的答案，但没有工作。我希望它缺少一些简单的东西。我正在尝试测试一行到txt文件。当我使用类似的代码时，文件创建得很好，并且没有抛出任何错误，txt只是没有写入/保存到文件中。我在VB中使用流编写器。这是我的代码：

   Imports System.IO
Public Class Form1
Private Sub btnGen2DArray_Click(sender As Object, e As EventArgs) 
Handles btnGen2DArray.Click
    Try

        'this is the file created and where it is saved:
        Dim fileLoc As String = "c:\Users\clint\save.txt"
        If File.Exists(fileLoc) Then
            Using sw As New StreamWriter(fileLoc)
                sw.Write("Test line write")
                sw.Close()
            End Using
        End If
        MsgBox("C++ 2D array text file created in: " + fileLoc, MsgBoxStyle.OkOnly, "Successful")
    Catch ex As Exception
        MsgBox("error: " + e.ToString(), MsgBoxStyle.OkOnly, "Error")
    End Try
End Sub
Private Sub btnClose_Click(sender As Object, e As EventArgs) Handles btnClose.Click
    Close()
End Sub
End Class

如果这有帮助，我正在使用vb 2012。普通窗口形成应用程序

Answer 1

完成后你需要close your StreamWriter。 sw.Close

您必须调用Close以确保正确写出所有数据到底层流。

更好的是，使用Using。以下内容将进入你的if：

Using sw As New StreamWriter(fileLoc)
    sw.Write("Test line write")
        For rowcount As Double = 1 To rows
            For colcount As Double = 1 To cols
                'when the file write test works I will finish the rest of the code here
            Next
        Next
End Using

这将自动为您处理StreamWriter。

文件未在vb.net中写入

1 个答案: