主题：关于在DataColChanged事件使用IsNumeric判断出错？

Dim dtn As String = e.DataTable.Name
Select Case dtn
    Case "McsEntDtl","McsOutWSDtl"
        Dim cl As DataCol = e.DataCol
        If cl.IsNumeric
           Dim cn As String = cl.Name
           Dim qsz,hsz As Double
           hsz = e.NewValue
           qsz = e.OldValue
           Functions.Execute("AutoSum",dtn,cn,qsz,hsz)         
        End If              
End Select

测试，在字段QTY上输入数值，错误提示按确定直接退出系统。各个数值型字段，除了QTY是整数，其余都是双精度的。

2、改了代码：

Dim dtn As String = e.DataTable.Name
Select Case dtn
    Case "McsEntDtl","McsOutWSDtl"
        Dim cl As DataCol = e.DataCol       
        Dim cn As String = cl.Name
        Select Case cn
            Case "QTY","NMWgt","GSWgt","AllWgt","GSMC","AllC","MyBillPay","GdBillPay"
                Dim qsz,hsz As Double
                hsz = e.NewValue
                qsz = e.OldValue
                Functions.Execute("AutoSum",dtn,cn,qsz,hsz)
        End Select        
        ' Case
       
End Select

数据测试没有任何问题

3、结论：整数型自动与这个IsNumeric“配合”得不是那么完好？！