如何使用vb.net从文本框插入数据到excel？

Question

I'm stuck here, I want to insert the data from 5 textbox to existing excel file in columns. I found code but its inserting by rows. I have below a code that finds the last non empty row and from that row I want to move to the next row and insert data there, for example last row is A2, I want to insert new data to A3, B3, C3, D3, E3.

I can't get the right loop for this.

Dim lRow As Long = 0
    Call OpenExcelFile("C:\Users\PB\Desktop\BookRecords.xlsx", 1)

    With xlWorkSheet
        If EXL.WorksheetFunction.CountA(.Cells) <> 0 Then
            lRow = .Cells.Find(What:="*", _
                          After:=.Range("A2"), _
                          LookAt:=Excel.XlLookAt.xlPart, _
                          LookIn:=Excel.XlFindLookIn.xlFormulas, _
                          SearchOrder:=Excel.XlSearchOrder.xlByRows, _
                          SearchDirection:=Excel.XlSearchDirection.xlPrevious, _
                          MatchCase:=False).Row
        Else
            lRow = 1


        End If
        lRow += 1

    End With
    MessageBox.Show("The last row in Sheet1 which has data is " & lRow)
    Dim j As Integer
    j = 3
    For i As Integer = j To 8
        xlWorkSheet.Range(xlWorkSheet.Cells(lRow + 1, j).item).Value = txtTitle.Text
        xlWorkSheet.Range(xlWorkSheet.Cells(lRow + 1, j).item).Value = txtAuthor.Text
        xlWorkSheet.Range(xlWorkSheet.Cells(lRow + 1, j).item).Value = txtEdition.Text
        xlWorkSheet.Range(xlWorkSheet.Cells(lRow + 1, j).item).Value = txtPublisher.Text
        xlWorkSheet.Range(xlWorkSheet.Cells(lRow + 1, j).item).Value = txtISBN.Text
    Next
    j += 1

    Call SaveAndCloseExcelSub()

Answer 1

Does this help:

Dim j As Integer
j = 3
For i As Integer = j To 8
MsgBox("Cell column: " & ColumnNumberToName(i))
Next

Code to convert numbers to Excel Column Names (AZ, AA, etc):

Public Shared Function ColumnNumberToName(columnNumber As Int32) As String
Dim dividend As Int32 = columnNumber
Dim columnName As [String] = [String].Empty
Dim modulo As Int32
While dividend > 0
    modulo = (dividend - 1) Mod 26
    columnName = Convert.ToChar(65 + modulo).ToString() + columnName
    dividend = DirectCast(((dividend - modulo) / 26), Int32)
End While

Return columnName
End Function

Public Shared Function ColumnNameToNumber(columnName As [String]) As Int32
If [String].IsNullOrEmpty(columnName) Then
    Throw New ArgumentNullException("columnName")
End If
Dim characters As Char() = columnName.ToUpperInvariant().ToCharArray()
Dim sum As Int32 = 0
Dim i As Int32 = 0
While i < characters.Length
    sum *= 26
    sum += (characters(i) - "A"C + 1)
    System.Math.Max(System.Threading.Interlocked.Increment(i),i - 1)
End While
Return sum
End Function

Answer 2

As it is, all your values are being written to the same cell; then you move down a row and do it again. Cells are addressed as (row, column) - so you need to change your code like this:

Dim j As Integer
j = 3
For i As Integer = j To 8
    xlWorkSheet.Cells(lRow + i, 1).Value = txtTitle.Text
    xlWorkSheet.Cells(lRow + i, 2).Value = txtAuthor.Text
    xlWorkSheet.Cells(lRow + i, 3).Value = txtEdition.Text
    xlWorkSheet.Cells(lRow + i, 4).Value = txtPublisher.Text
    xlWorkSheet.Cells(lRow + i, 5).Value = txtISBN.Text
Next

Not sure if you need to start with i = 3 if you add lRow to it but I'm sure you can work that out.

If you want the order reversed, do this (this example copies only one lot of text... I am beginning to suspect there is no need for the loop)

dim i as Integer
i = 1; ' if you want column A
With xlWorkSheet
    .Cells(lRow    , i).Value = txtTitle.Text
    .Cells(lRow + 1, i).Value = txtAuthor.Text
    .Cells(lRow + 2, i).Value = txtEdition.Text
    .Cells(lRow + 3, i).value = txtPublisher.Text
    .Cells(lRow + 4, i).Value = txtISBN.Text
End With