Z1 CSV import - validate 7 columns, no header

vba_code_kotsu_master.txt

@@ -1,5 +1,4 @@
 ' CSV Header Constants
-Const CSV_HEADER As String = "利用区間コード,券種,コード,名称,1箇月運賃/販売額,定期額/券１(額)/利用額,定期支給期間/券１(枚)/特別料金,特別料金/券２(額),券２(枚),端数(額),特別料金"
 
 
 Sub ClearRowData(ByVal ws As Worksheet, ByVal rowNum As Long)
@@ -47,20 +46,17 @@ Sub ImportMasterDetailData()
     
     lines = Split(textContent, vbLf)
     
-    ' === Validate CSV header ===
-    If UBound(lines) >= 0 And Trim(lines(0)) <> "" Then
-        Dim csvHeader As String
-        csvHeader = Trim(lines(0))
-        ' Validate column count
-        Dim expectedCount As Long
-        expectedCount = UBound(Split(CSV_HEADER, ",")) + 1
-        Dim headerFields As Variant
-        headerFields = Split(csvHeader, ",")
-        If UBound(headerFields) + 1 <> expectedCount Then
-            MsgBox "CSV column count mismatch. Expected: " & expectedCount & ", Got: " & UBound(headerFields) + 1, vbExclamation
-            Exit Sub
+    ' === Validate data rows - must have exactly 7 columns ===
+    Dim lineNum As Long
+    For lineNum = 0 To UBound(lines)
+        If Trim(lines(lineNum)) <> "" Then
+            dataArray = Split(lines(lineNum), ",")
+            If UBound(dataArray) + 1 <> 7 Then
+                MsgBox "CSV line " & (lineNum + 1) & " has " & (UBound(dataArray) + 1) & " columns. Expected 7.", vbExclamation
+                Exit Sub
+            End If
         End If
-    End If
+    Next lineNum
     
     ' === Clear all data rows before import ===
     lastRow = wsTarget.Cells(wsTarget.Rows.Count, "C").End(xlUp).Row
@@ -77,7 +73,7 @@ Sub ImportMasterDetailData()
     Dim csvData As Object
     Set csvData = CreateObject("Scripting.Dictionary")
     
-    For i = 1 To UBound(lines)
+    For i = 0 To UBound(lines)
         If Trim(lines(i)) = "" Then GoTo NextCsvLine
         dataArray = Split(lines(i), ",")
         If UBound(dataArray) >= 0 Then
@@ -98,7 +94,7 @@ NextCsvLine:
     ' === Step 6: Write CSV data to next available row === 
     writeRow = 7
     
-    For i = 1 To UBound(lines)
+    For i = 0 To UBound(lines)
         If Trim(lines(i)) = "" Then GoTo NextLine
         
         dataArray = Split(lines(i), ",")