【解決方法】データテーブルからメモ帳で一番上に値を繰り返すのはホット

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		Issued Detail			
						Page No.1	
Item Issued For Customer :101
-----------------------------------------		
Id		Item		Qty		Date
-----------------------------------------
101		Pen		    10		10/05/2021
101		Copy		10		10/05/2021
101		Glue		1		10/05/2021
101		Cover		10		10/05/2021
----------------------------------------
Total		4		31	
----------------------------------------

						Page No.2
Item Issued For Customer :102
----------------------------------------			
Id		Item		Qty		Date
----------------------------------------		
102		Bag		    1		09/06/2021
102		Pencil Box	2		09/06/2021
102		Cover		5		09/06/2021
---------------------------------------------------------
Total		3		8	
---------------------------------------------------------
SubTotal	7		39	
---------------------------------------------------------

私が試したこと：

Using sw As New StreamWriter(OutPutFile)
<pre>  For I As Integer = 0 To dt.Rows.Count - 1
 sw.WriteLine("------------------------------------------------------------")                            
            sw.WriteLine(dt.Rows(I).Item(0).ToString.PadRight(15) & vbTab & dt.Rows(I).Item(1).ToString().PadRight(25) & vbTab & dt.Rows(I).Item(2).ToString().PadRight(10) & vbTab & dt.Rows(I).Item(3).ToString())    
            Next
            Process.Start(OutPutFile)

使用終了

解決策 1

出力ファイルを使用する前にストリームを閉じてください。そうしないと、どの p でも開くことができません。[rocess – including ones in your own application.

In other words, the End Using needs to be before the Process.Start

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