關于VB.NET制作記事本自動保存的問題

分類: 電腦/網絡 程序設計 其他編程語言

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問題描述:

我用的是Timer計時器：

如何將程序控制住，讓它第一次發現沒保存后，只擊活一次提示保存，然后使用修改后的保存路徑：（代碼如下）

Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer1.Tick

'如何將程序控制住，讓它第一次發現沒保存后，只擊活一次提示保存，然后使用修改后的保存路徑

If SaveFileDialog1.FileName = "" Then

If SaveFileDialog1.ShowDialog Then

rtbox.SaveFile(SaveFileDialog1.FileName, RichTextBoxStreamType.PlainText)

End If

Else

'如果已經選擇了要保存的文件名，則保存文本到文件中

rtbox.SaveFile(SaveFileDialog1.FileName, RichTextBoxStreamType.PlainText)

End If

End Sub

————————————————————

此代碼執行后變成死循環。

解析:

經過我的潛心修煉問題終于是解決了.請看代碼

Imports System.IO

Private strFileName As String = "myRTFdoc.txt"

Private flgFirst As Boolean = True

Private Sub Timer2_Tick(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Timer2.Tick

'如何將程序控制住，讓它第一次發現沒保存后，只擊活一次提示保存，然后使用修改后的保存路徑

Call zc()

End Sub

Private Sub zc()

'Timer2.Stop()

With SaveFileDialog1

.DefaultExt = "txt"

.FileName = strFileName

.Filter = "Text files(*.txt)|*.txt|All files(*.*)|*.*"

.FilterIndex = 1

.InitialDirectory = "c:\"

.OverwritePrompt = True

.Title = "Save Reminding"

End With

'Timer2.Enabled = False

If flgFirst = True Then

If SaveFileDialog1.ShowDialog = DialogResult.OK Then

strFileName = SaveFileDialog1.FileName

Dim objWriter As StreamWriter = New StreamWriter(strFileName, False)

objWriter.Write(rtbox.Text)

objWriter.Close()

objWriter = Nothing

End If

flgFirst = False

'Timer2.Enabled = True

' Timer2.Start()

Else

'flg= second

Dim objWriter As StreamWriter = New StreamWriter(strFileName, False)

objWriter.Write(rtbox.Text)

objWriter.Close()

objWriter = Nothing

End If

'Timer2.Enabled = True

'Timer2.Start()

End Sub

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

Timer2.Enabled = True

' zc()

End Sub

知道問題在哪里嘛?我調試了確實是"死循環"、其實不是真正的死循環、是time tick事件你設定的時間太短了.估計只設置了1-5s左右.那么程序運行還需要時間.所以他就不停地調用timetick時間.你的savedialog對話框根本來不急彈出來.

所以建議你把timer的interval的值設置高點最好12-15秒 觸發一次.

當然我想還有其他的方法、還沒有徹底取研究下.

比如stop 什么 、那還需要時間.

至少目前我的方法是可以了.

我設置的12s P4. 3.0 1G 內存 跑下我的程序如果 F10(F8)慢點的話就來不及了.

另為把你的程序小改了下、應該可以滿足你的要求了.

用vb.net編寫記事本源代碼

Dim sFileName As String

Dim Search

Private Sub dateTimeMenu_Click()

Text1.Text = Now

End Sub

Private Sub deleteMenu_Click()

Text1.Text = Left(Text1.Text, Text1.SelStart) + Mid(Text1.Text, Text1.SelStart + Text1.SelLength + 1)

End Sub

Private Sub findMenu_Click()

Search = InputBox("請輸入要查找的字詞：")

Dim Where1 '獲取需要查找的字符串變量

Text1.SetFocus '文本框獲得焦點，以顯示所找到的內容Search = InputBox("請輸入要查找的字詞：")

Where1 = InStr(Text1.Text, Search) '在文本中查找字符串

If Where1 Then

'若找到則設置選定的起始位置并使找到的字符串高亮

Text1.SelStart = Where1 - 1

Text1.SelLength = Len(Search)

' Me.Caption = Where1 '測試用

'否則給出提示

Else: MsgBox "未找到所要查找的字符串。", vbInformation, "提示"

End If

End Sub

Private Sub findNextMenu_Click()

Dim Where2

Dim StartMe As Integer '查找的起始位置變量

Text1.SetFocus '文本框獲得焦點

StartMe = Text1.SelLength + Text1.SelStart + 1 '給變量賦值

Where2 = InStr(StartMe, Text1.Text, Search) '令其從上次找到的地方找起

If Where2 Then

Text1.SelStart = Where2 - 1

Text1.SelLength = Len(Search)

Else: MsgBox "未找到所要查找的字符串.", vbInformation, "提示"

End If

End Sub

Private Sub aboutMenu_Click()

MsgBox Space(2) "文本編輯器版本號1.0" Chr(13) "由西南財經大學天府學院" Chr(13) Space(5) "肖忠 開發" Chr(13) Space(2) "copyright:天府學院"

End Sub

Private Sub allMenu_Click()

Text1.SelStart = 0

Text1.SelLength = Len(Text1.Text)

End Sub

Private Sub backcolorMenu_Click() '設置背景色代碼

Form1.CommonDialog1.Action = 3

Text1.BackColor = Form1.CommonDialog1.Color

End Sub

Private Sub colorMenu_Click() '改變文字顏色代碼

Form1.CommonDialog1.Action = 3

Text1.ForeColor = Form1.CommonDialog1.Color

End Sub

Private Sub cutMenu_Click()

Clipboard.SetText Text1.SelText

Text1.Text = Left(Text1.Text, Text1.SelStart) + Mid(Text1.Text, Text1.SelStart + Text1.SelLength + 1)

End Sub

Private Sub exitMenu_Click()

End

End Sub

Private Sub fontMenu_Click() '字體菜單代碼

Form1.CommonDialog1.Flags = 3 Or 256

Form1.CommonDialog1.Action = 4

If Len(Form1.CommonDialog1.FontName) = 0 Then

Form1.Text1.FontName = "宋體"

Else

Form1.Text1.FontName = Form1.CommonDialog1.FontName

End If

Form1.Text1.FontSize = Form1.CommonDialog1.FontSize

If Form1.CommonDialog1.FontBold = True Then

Form1.Text1.FontBold = True

Else

Form1.Text1.FontBold = False

End If

If Form1.CommonDialog1.FontItalic = True Then

Form1.Text1.FontItalic = True

Else

Form1.Text1.FontItalic = False

End If

Text1.ForeColor = Form1.CommonDialog1.Color

End Sub

Private Sub Form_Load()

Form1.Text1.Width = Form1.Width - 130

Form1.Text1.Height = Form1.Height

End Sub

Private Sub Form_Resize()

Form1.Text1.Width = Form1.Width - 130

Form1.Text1.Height = Form1.Height

End Sub

Private Sub help1Menu_Click()

Form1.CommonDialog1.HelpCommand = cdlHelpForceFile

Form1.CommonDialog1.HelpFile = "c:\windows\system32\winhelp.hlp"

CommonDialog1.ShowHelp

End Sub

Private Sub newMenu_Click()

If Len(Trim(Text1.Text)) = 0 Then

Form1.Caption = "我的記事本" "--" "未命名"

sFileName = "未命名"

Text1.FontSize = 15

Text1.FontName = "宋體"

Text1.Text = ""

Else

Call saveAsMenu_Click

Form1.Caption = "我的記事本" "--" "未命名"

sFileName = "未命名"

Text1.FontSize = 15

Text1.FontName = "宋體"

Text1.Text = ""

End If

End Sub

Private Sub openMenu_Click() '打開文件代碼

If Len(Trim(Text1.Text)) = 0 Then

Form1.Caption = "我的記事本"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 4096

Form1.CommonDialog1.Action = 1

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Form1.Caption = Form1.Caption "--" Form1.CommonDialog1.FileTitle

Open sFileName For Input As #1

Text1.FontSize = 15

Text1.FontName = "宋體"

Do While Not EOF(1)

Line Input #1, Text$

All$ = All$ + Text$ + Chr(13) + Chr(10)

Loop

Text1.Text = All

Close #1

End If

Else

Call saveAsMenu_Click

Form1.Caption = "我的記事本"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 4096

Form1.CommonDialog1.Action = 1

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Form1.Caption = Form1.Caption "--" Form1.CommonDialog1.FileTitle

Open sFileName For Input As #1

Text1.FontSize = 15

Text1.FontName = "宋體"

Do While Not EOF(1)

Line Input #1, Text$

All$ = All$ + Text$ + Chr(13) + Chr(10)

Loop

Text1.Text = All

Close #1

End If

End If

End Sub

Private Sub pasteMenu_Click() '粘貼菜單代碼

Text1.Text = Left(Text1.Text, Text1.SelStart) + Clipboard.GetText() + Mid(Text1.Text, Text1.SelStart + Text1.SelLength + 1)

End Sub

Private Sub printMenu_Click()

Form1.CommonDialog1.ShowPrinter

For i = 1 To CommonDialog1.Copies

Printer.Print Text1.Text

Printer.Print Text1.Text

Next

Printer.EndDoc

End Sub

Private Sub saveAsMenu_Click() '另存為菜單代碼

If Len(Trim(Text1.Text)) 0 Then

Form1.CommonDialog1.DialogTitle = "保存文件"

Form1.CommonDialog1.InitDir = "D:\"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 2

Form1.CommonDialog1.ShowSave

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Open sFileName For Output As #1

whole$ = Text1.Text

Print #1, whole

Close #1

End If

End If

End Sub

Private Sub saveMenu_Click()

If Len(Trim(Text1.Text)) 0 Then

Form1.CommonDialog1.DialogTitle = "保存文件"

Form1.CommonDialog1.InitDir = "D:\"

Form1.CommonDialog1.FileName = "新建文本"

Form1.CommonDialog1.Filter = "文本文件|*.txt"

Form1.CommonDialog1.Flags = 2

Form1.CommonDialog1.ShowSave

If Len(Form1.CommonDialog1.FileName) 0 Then

sFileName = Form1.CommonDialog1.FileName

Open sFileName For Output As #1

whole$ = Text1.Text

Print #1, whole

Close #1

End If

End If

End Sub

Private Sub statusMenu_Click()

End Sub

VB.NET中的所有數據文件均可用記事本打開?

這個啊，呵呵，應該不難吧先找到你要打開的應用程序的文件然后用一個調用代碼：System.Diagnostics.Process.Start("C:\WINDOWS\system32\notepad.exe")這是要開記事本的System.Diagnostics.Process.Start("C:\WINDOWS\system32\calc.exe")這是打開計算器的應該也可以把這兩個應用程序復制到你的程序的默認目錄下，就是BIN下吧！呵呵，試試！！要給我加分哦！！！

怎樣在VB .NET中調用記事本和計算器

這個啊，呵呵，應該不難吧

先找到你要打開的應用程序的文件

然后用一個調用代碼：

System.Diagnostics.Process.Start("C:\WINDOWS\system32\notepad.exe")

這是要開記事本的

System.Diagnostics.Process.Start("C:\WINDOWS\system32\calc.exe")

這是打開計算器的

應該也可以把這兩個應用程序復制到你的程序的默認目錄下，就是BIN下吧！

呵呵，試試！！要給我加分哦！！！