Question

 Dim ColNames(7) As String
 Dim Values(7) As Object
 Dim now As DateTime = DateTime.Now()

 ColNames(0) = "Int1"
 ColNames(1) = "Int2"
 ColNames(2) = "String1"
 ColNames(3) = "String2"
 ColNames(4) = "String3"
 ColNames(5) = "String4"
 ColNames(6) = "String5"
 ColNames(7) = "String6"

 Values(0) = intVar1
 Values(1) = intVar2
 Values(2) = strVar1
 Values(3) = strVar2
 Values(4) = strVar3
 Values(5) = strVar4
 Values(6) = strVar5
 Values(7) = strVar6

 Dim goodToInsert As Boolean = True

 For i As Integer = 0 To 7
     If Values(i) = Nothing OrElse Len(Values(i)) = 0 Then
         goodToInsert = False
     End If
 Next


 If goodToInsert Then
     accessDatabase.InsertIntoTable("MyTable", ColNames, Values)
 End If

这部分代码处理收集数据以插入到我的访问数据库中。

    Public Sub InsertIntoTable(ByRef TableName As String, ByRef ColumnName() As String, ByRef KeyValue() As Object)

'ColumnName and KeyValue need to have the same number of elements
'be careful when attemping to insert a value into the PrimaryKey Column as it may be of a type that cannot but manually changed

'INSERT NEW DATA INTO A TABLE
'   INSERT INTO {tablename} ([{columnname1}], [{columnname2}], [{columnname3}], ...) VALUES ('{string}', {number}, {boolean}, ...), oledbconnection

Dim ColumnString As String = vbNullString
Dim KeyString As String = vbNullString

For i As Integer = 0 To ColumnName.GetUpperBound(0)
    'build the column names part of the string
    If i <> ColumnName.GetUpperBound(0) Then
        ColumnString = ColumnString & "[" & ColumnName(i) & "], "
    Else
        ColumnString = ColumnString & "[" & ColumnName(i) & "]"
    End If
    'build the values part of the string
    Dim TempValue As String = vbNullString

    If KeyValue(i) <> Nothing Then
        If KeyValue(i).GetType.ToString = "System.String" Then
            TempValue = "'" & KeyValue(i) & "'"
        Else
            TempValue = KeyValue(i)
        End If
        If i <> KeyValue.GetUpperBound(0) Then
            KeyString = KeyString & vbNullString & TempValue & ", "
        Else
            KeyString &= TempValue
        End If
    Else
        Debug.Print("Nothing")
        If i <> KeyValue.GetUpperBound(0) Then
            KeyString &= ", "
        End If
    End If
Next

Dim con As New OleDbConnection
Dim da As New OleDbDataAdapter
Dim sql As New OleDbCommand

con.ConnectionString = Connection()
con.Open()

Dim commandText As String = "INSERT INTO " & TableName & " (" & ColumnString & ") VALUES (" & KeyString & ")"

Try
    sql.Connection = con
    sql.CommandText = commandText
    da.InsertCommand = sql
    da.InsertCommand.ExecuteNonQuery()
Catch ex As Exception
    Debug.Print(ex.ToString)

End Try

con.Close()

End Sub

这是InsertIntoTable函数。

该函数正常运行并正确地将数据插入到我的表中，但是在我的调试输出中，我在每次调用da.InsertCommand.ExecuteNonQuery（）时都会注意到这个错误：

First-chance exception at 0x761EC42D in 3024 Card Sorter.exe: Microsoft C++ exception: int at memory location 0x003ED1EC. First-chance exception at 0x761EC42D in 3024 Card Sorter.exe: Microsoft C++ exception: int at memory location 0x003ED1EC.

我能够使用Visual Studio调试器将其缩小到ExecuteNonQuery（）的位置，但我无法理解它的含义，以及如何解决它。我试图将我的intVars更改为Strings而没有运气来解决异常，我也非常好奇为什么我的Try ... Catch没有抓到它。

foo.exe中0x761EC42D的第一次机会异常：Microsoft C ++异常：int在内存位置0x003ED1EC

0 个答案: