导航Access Access VBA中的表记录

问题描述：

我有一个包含两列（值为1和值为2）的表，这些值按照从最低到最高排序。例如：导航Access Access VBA中的表记录

我要求用户输入的输入值，然后我计算可在以下任一来计算CalcFinalValue的值：

如果用户输入值已经存在在value1字段中，然后返回字段value2中的相应值。例如，如果用户输入为100，则CalcFinalValue将为15
如果用户输入值不存在于value1字段中，则在value1字段中找到输入值位于它们之间的两个值（例如，如果输入值是42，我想从value1字段找到40和43）。计算CalcFinalValue为： CalcFinalValue =（40 * 9）+（43 * 5）/ 42

换句话说式将是如下： CalcFinalValue =（LowerValue的其间值*查找的值中间值的HigherValue）+（中间值的HigherValue *中间值的LowerValue的查找值）/（用户输入值）我想在Access 2007 VBA中执行此操作。

我希望这很清楚。感谢您的帮助！

答

Dim rs AS DAO.Recordset 
Set rs = CurrentDb.OpenRecordset("TableName", dbOpenTable) 

' inp stores the user input value; i counts the number of records that have been accessed 
Dim inp, i as Integer 
' r2c1 and r2c2 store the data of the second row in case the two-row calculation is needed 
Dim r2c1, r2c2 as integer 

' Since I mostly use forms for I/O that's what I've used here 
' Change this to whatever method you use to get the user input 
inp = Forms!FormName.InputTextBoxName.Value 
i = 0 
rs.MoveFirst 
Do While (Not rs.EOF) 
    i = i + 1 
    ' Check if the user input exists in the table 
    If (rs.Fields("Value1") = inp) Then 
     ' Again use whatever output method you want 
     Set Forms!FormName.OutputTextBoxName.Value = rs.Fields("Value1") 
     End Do 
    ' Otherwise, check if the current value in column 1 is greater than the input 
    Else If (rs.Fields("Value1") > inp) Then 
     ' If this is true for the first row then the input is less than the lowest number. 
     ' I assume this is out-of-bounds, but use whatever boundary condition you want 
     If (i = 1) Then 
      MsgBox("Out of Bounds", vbOkOnly) 
     Else 
      ' Save the required values from this row 
      r2c2 = rs.Fields("Value2") 
      r2c1 = rs.Fields("Value1") 
      ' Goto previous row which and calculate according to your formula 
      rs.MoveLast 
      Set Forms!FormName.OutputTextBoxName.Value = (r2c1*r2c2 + rs.Fields("Value1")*rs.Fields("Value2"))/inp 
     End If 
    End If 
    rs.MoveNext 
Loop 
' If nothing was found, the input was larger than all values in 'Value1' 
If (rs.EOF) Then 
    MsgBox("Out of Bounds", vbOkOnly) 
End If

替代值1和值2与任何列名使用

导航Access Access VBA中的表记录

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