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图二
原标题:Flip two rows of a datatable

页: 1 • 拥有网上数据表。 我需要略去其中两人的位置。 例如,一个数据表,即选择说明有优先权条款的次序。 用户希望通过选择单行和点击增加优先程度来提升单一行的优先地位,如何将一行推移(AKA双行)

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最佳回答

用“优先”栏分类的表格使用。 如果你希望增加优先程度,增加这一栏,并减少上列。 <>DataView将反映国际交易日志的改动。

Private _view As DataView

...

_view = New DataView(theTable, "", "priority", DataViewRowState.CurrentRows)
dataGridView1.DataSource = _view

...


  Increase priority of row at index i
If i > 0 Then
    Dim row = _view(i)
    Dim previousRow = _view(i - 1)
    row("priority") = row("priority") + 1
    previousRow("priority") = previousRow("priority") - 1
End


...


  Decrease priority of row at index i
If i < _view.Count - 1 Then
    Dim row = _view(i)
    Dim nextRow = _view(i + 1)
    row("priority") = row("priority") - 1
    nextRow ("priority") = nextRow ("priority") + 1
End

当你改变优先事项时,利用数据Adapter更新数据库

问题回答

你们都可以这样做:

更新数据库中两行的优先顺序,然后重新启用你的电网(如果假设你有显示你的数据表的电网)。 (最容易、最昂贵)

或者,你可以更新数据库中的优先事项,并在方案上更新这两个行的未收情况。 (略微困难,最便宜)





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