主题：这种用法下如何判断列的类型?

1、你写一个 Isnumeric 函数判断不就好了？

2、

Dim systable As System.Data.DataTable = CurrentTable.DataTable.BaseTable
Dim ChangeTable As System.Data.DataTable
ChangeTable = systable.GetChanges(System.Data.DataRowState.Deleted)
If ChangeTable IsNot Nothing Then
    For Each dr As System.Data.DataRow In ChangeTable.Rows    '循环获取修改语句
        Dim str = dr("_Identify", System.Data.DataRowVersion.Original)
        output.show(str)
    Next
End If