数据表中的操作

Question

我想从我的数据表中选择一系列数据

我在datatable.Select（）方法中尝试过。

考虑一下，我在 dtExcelSource 中有10行数据，现在从第4行过滤并从第5行到最后一行插入记录。

我在vb.Net编码

     dtExcelSource = DS.Tables("SourceTbl")

            dtExcelSource.Columns(0).ColumnName = "A"
            dtExcelSource.Columns(1).ColumnName = "B "
            dtExcelSource.Columns(2).ColumnName = "CNo"
            dtExcelSource.Columns(3).ColumnName = "DNo"
            dtExcelSource.Columns(4).ColumnName = "E"
            dtExcelSource.Columns(5).ColumnName = " F"

            Dim filterDT As DataTable = dtExcelSource.Clone()
            Dim rows As DataRow() = dtExcelSource.[Select](???)
            For Each row As DataRow In rows
                filterDT.ImportRow(row)
            Next

            gridView.datasource = filterDT

Answer 1

怎么样：

For Each row As DataRow In dtExcelSource.Rows
  If *your range criteria*
    filterDT.ImportRow(row)
  End If
Next

Answer 2

也许您需要使用For Loop代替For Each，如果您只是按行号过滤，则不需要SELECT：

    For iRowNo As Integer = 3 To dtExcelSource.Rows.Count - 1
        filterDT.ImportRow(dtExcelSource.Rows(iRowNo))
    Next