VB.NET如何使用Excel文件

小编给大家分享一下VB.NET如何使用Excel文件，相信大部分人都还不怎么了解，因此分享这篇文章给大家参考一下，希望大家阅读完这篇文章后大有收获，下面让我们一起去了解一下吧！

一、VB.NET Excel文件函数代码：

view plaincopy to clipboardprint?  Option Explicit   Public Function MergeXlsFile(ByVal strPath As String, Optional ByVal SheetCount As Byte = 1) As Boolean  Dim i As Integer  Dim strSrcFile As String  Dim nRows As Long, nCols As Long, nSheets As Byte, nNewRows() As Integer  Dim xlApp As Object, xlSrcBook As Object, xlNewBook As Object, xlSheet As Object, xlRange As Object  On Error Resume Next  If Right(strPath, 1) <> "\" Then strPathstrPath = strPath & "\"   '如果需要合并文件中的工作表数量小于1则退出   If SheetCount < 1 Then Exit Function  '删除掉该路径下原来的合并文件   If Dir(strPath & "合并后的文件.xls") <> "" Then Kill strPath & "合并后的文件.xls"  '获得第1个XLS文件   strSrcFile = Dir(strPath & "*.xls")   '如果文件不存在则退出   If Len(strSrcFile) = 0 Then Exit Function  '创建一个Excel实例   Set xlApp = CreateObject("Excel.Application")   '新建一个工作簿   Set xlNewBook = xlApp.Workbooks.Add   '调整新建工作簿里工作表的数量   ReDim nNewRows(1 To SheetCount)   For i = 1 To SheetCount - xlNewBook.Sheets.Count   xlNewBook.Sheets.Add , xlNewBook.Sheets(xlNewBook.Sheets.Count)   Next  '循环查找当前路径下的所有XLS文件   Do  '打开找到的XLS文件   Set xlSrcBook = xlApp.Workbooks.Open(strPath & strSrcFile)   '循环复制源XLS文件里的工作表   nSheets = IIf(xlSrcBook.Sheets.Count < SheetCount, xlSrcBook.Sheets.Count, SheetCount)   For i = 1 To nSheets   Set xlSheet = xlSrcBook.Sheets(i)   '获得源XLS文件中第i个工作表实际数据的行列数   nRows = xlSheet.UsedRange.Rows.Count   nCols = xlSheet.UsedRange.Columns.Count   '使用范围对象粘贴源XLS文件数据到合并结果文件中   Set xlRange = xlSheet.Range(xlSheet.Cells(1, 1), xlSheet.Cells(nRows, nCols))   xlRange.Select  xlRange.Copy   xlNewBook.Sheets(i).Cells(nNewRows(i) + 1, 1).PasteSpecial &HFFFFEFF8   '保存合并结果文件中第i个工作表的行数   nNewRows(i) = xlNewBook.Sheets(1).UsedRange.Rows.Count   Next  '关闭打开的源XLS文件   xlSrcBook.Close   '继续查找下一个XLS文件   strSrcFile = Dir()   Loop Until Len(strSrcFile) = 0   '保存并关闭合并结果文件   xlNewBook.SaveAs strPath & "合并后的文件.xls"  xlNewBook.Close   '退出Excel实例   xlApp.Quit   '释放资源   Erase nNewRows   Set xlRange = Nothing Set xlSheet = Nothing Set xlNewBook = Nothing Set xlSrcBook = Nothing If Err.Number = 0 Then MergeXlsFile = True End Function  Option Explicit   Public Function MergeXlsFile(ByVal strPath As String, Optional ByVal SheetCount As Byte = 1) As Boolean  Dim i As Integer  Dim strSrcFile As String  Dim nRows As Long, nCols As Long, nSheets As Byte, nNewRows() As Integer  Dim xlApp As Object, xlSrcBook As Object, xlNewBook As Object, xlSheet As Object, xlRange As Object   On Error Resume Next  If Right(strPath, 1) <> "\" Then strPathstrPath = strPath & "\"  '如果需要合并文件中的工作表数量小于1则退出  If SheetCount < 1 Then Exit Function  '删除掉该路径下原来的合并文件  If Dir(strPath & "合并后的文件.xls") <> "" Then Kill strPath & "合并后的文件.xls"  '获得第1个XLS文件  strSrcFile = Dir(strPath & "*.xls")  '如果文件不存在则退出  If Len(strSrcFile) = 0 Then Exit Function  '创建一个Excel实例  Set xlApp = CreateObject("Excel.Application")  '新建一个工作簿  Set xlNewBook = xlApp.Workbooks.Add  '调整新建工作簿里工作表的数量  ReDim nNewRows(1 To SheetCount)  For i = 1 To SheetCount - xlNewBook.Sheets.Count  xlNewBook.Sheets.Add , xlNewBook.Sheets(xlNewBook.Sheets.Count)  Next  '循环查找当前路径下的所有XLS文件  Do  '打开找到的XLS文件  Set xlSrcBook = xlApp.Workbooks.Open(strPath & strSrcFile)  '循环复制源XLS文件里的工作表  nSheets = IIf(xlSrcBook.Sheets.Count < SheetCount, xlSrcBook.Sheets.Count, SheetCount)  For i = 1 To nSheets  Set xlSheet = xlSrcBook.Sheets(i)  '获得源XLS文件中第i个工作表实际数据的行列数  nRows = xlSheet.UsedRange.Rows.Count  nCols = xlSheet.UsedRange.Columns.Count  '使用范围对象粘贴源XLS文件数据到合并结果文件中  Set xlRange = xlSheet.Range(xlSheet.Cells(1, 1), xlSheet.Cells(nRows, nCols))  xlRange.Select  xlRange.Copy  xlNewBook.Sheets(i).Cells(nNewRows(i) + 1, 1).PasteSpecial &HFFFFEFF8  '保存合并结果文件中第i个工作表的行数  nNewRows(i) = xlNewBook.Sheets(1).UsedRange.Rows.Count  Next  '关闭打开的源XLS文件  xlSrcBook.Close  '继续查找下一个XLS文件  strSrcFile = Dir()  Loop Until Len(strSrcFile) = 0  '保存并关闭合并结果文件  xlNewBook.SaveAs strPath & "合并后的文件.xls"  xlNewBook.Close  '退出Excel实例  xlApp.Quit  '释放资源  Erase nNewRows  Set xlRange = Nothing Set xlSheet = Nothing Set xlNewBook = Nothing Set xlSrcBook = Nothing If Err.Number = 0 Then MergeXlsFile = True End Function

二、VB.NET Excel文件调用方法：

view plaincopy to clipboardprint?  Sub main()   If MergeXlsFile("c:\temp", 1) Then  MsgBox "数据已成功合并!", vbInformation, "提示"  Else  MsgBox "数据合并失败!", vbCritical, "提示"  End If  End Sub

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