讀文件內(nèi)容到TextBox :
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Try
Using sr As StreamReader = New StreamReader("C:\\TestFile.txt")
textbox1.Text = sr.ReadToEnd()
End Using
Catch E As Exception
Console.WriteLine(E.Message)
End Try
修改完成后,保存到文件:
Using sw As StreamWriter = New StreamWriter("C:\\TestFile.txt")
sw.Write(textbox1.Text)
sw.Close()
End Using
其中,流構(gòu)造的參數(shù)
New StreamReader("C:\\TestFile.txt")
New StreamWriter("C:\\TestFile.txt")
中的"C:\\TestFile.txt"可以用OpenFileDialog和SaveFileDialog的FileName屬性替換.
Dim openFileDialog1 As New OpenFileDialog()
openFileDialog1.InitialDirectory = "c:\"
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*"
openFileDialog1.FilterIndex = 2
openFileDialog1.RestoreDirectory = True
If openFileDialog1.ShowDialog() = System.Windows.Forms.DialogResult.OK Then
Try
Using sr As StreamReader = New StreamReader(openFileDialog1.FileName)
textbox1.Text = sr.ReadToEnd()
End Using
Catch E As Exception
Console.WriteLine(E.Message)
End Try
End If
保存的時候換成SaveFileDialog就好
可以利用msgbox 實現(xiàn),也可以通過另外的窗體上畫出表格實現(xiàn)
方法一,利用msgbox:
Private Sub Command1_Click()Dim a As Long, b As Long, c As LongMsgBox "┌────┬────┬────┐" vbCrLf _ "│ 庫存1 │ 庫存2 │ 庫存3 │" vbCrLf _ "├────┼────┼────┤" vbCrLf _ "│" formatstr(a) "│" formatstr(b) "│" formatstr(c) "│" vbCrLf _ "└────┴────┴────┘" End SubPrivate Function formatstr(ByVal inputStr As String) As StringDim j As Integerj = (8 - Len(inputStr)) \ 2formatstr = Space(j) inputStr Space(j) Space((8 - Len(inputStr)) Mod 2)End Function
方法二,利用窗體實現(xiàn):
’新建form2窗體‘將以下代碼復制到form2窗體中Private Sub Form_Load()ShowPrint "┌────┬────┬────┐" vbCrLf _ "│ 庫存1 │ 庫存2 │ 庫存3 │" vbCrLf _ "├────┼────┼────┤" vbCrLf _ "│" formatstr(a) "│" formatstr(b) "│" formatstr(c) "│" vbCrLf _ "└────┴────┴────┘" End SubPrivate Function formatstr(ByVal inputStr As String) As StringDim j As Integerj = (8 - Len(inputStr)) \ 2formatstr = Space(j) inputStr Space(j) Space((8 - Len(inputStr)) Mod 2)End Function‘將以下代碼復制在form1窗體中Private Sub Command1_Click()Form2.ShowEnd Sub
Filter 屬性設(shè)置當前文件名篩選字符串,該字符串確定出現(xiàn)在對話框的“文件類型”框中的選項。
openFileDialog1.InitialDirectory = "c:\\" ;
openFileDialog1.Filter = "txt files (*.txt)|*.txt|All files (*.*)|*.*" ;
openFileDialog1.FilterIndex = 1 ; // 獲取或設(shè)置文件對話框中當前選定篩選器的索引;
openFileDialog1.RestoreDirectory = true ;
對于每個篩選選項,篩選器字符串都包含篩選器說明,后接一垂直線條 (|) 和篩選器模式。不同篩選選項的字符串由垂直線條隔開。
Dim dialog As OpenFileDialog = New OpenFileDialog
If dialog.ShowDialog() = Windows.Forms.DialogResult.OK Then
Dim filename As String
filename = dialog.FileName
Dim results() As String
results = filename.Split("\")
filename = results(results.Length - 1)
filename = filename.Substring(0, filename.LastIndexOf("."))
MessageBox.Show(filename)
End If
dialog.Dispose()
用msgbox()顯示對話框
msgbox的用法很多,基礎(chǔ)的就是msgbox(“你要顯示的內(nèi)容”)
或者msgbox(“你要顯示的內(nèi)容”,16,"對話框名稱")'16是對話框的類型,還有幾個鍵的組合代碼,這個你可以
查查
,很多,或者你也可以用提示給出的類型,比如MsgBoxStyle.Exclamation就是顯示錯誤對話框,
你這2個按鈕的目的不是一樣嗎
Dim fbd As New FolderBrowserDialogfbd.Description = "請選擇文件夾。"fbd.RootFolder = Environment.SpecialFolder.Desktop '根目錄
fbd.SelectedPath = "C:\Windows" '默認打開文件夾
fbd.ShowNewFolderButton = True '是否可以創(chuàng)建新文件夾
If fbd.ShowDialog(Me) = DialogResult.OK Then
textbox1.text=fbd.SelectedPath
End If
本文標題:vb.net打開對話 vb 打開文件對話框
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