今天寫專案功能點時，遇到乙個問題，datagridviewtextboxcolumn 只能輸入數值，並且格式化為 ***xx.xx 兩位小數.
想了很多方法，但只能是輸入完後才驗證，後來在網上搜了一下，找到了乙個好的方法，經過修改後不錯，現在我把它轉換為vb.net 語言，記錄下來：
private _editcell as datagridviewtextboxeditingcontrol = nothing
private sub dgvservices_editingcontrolshowing(byval sender as system.object, byval e as system.windows.forms.datagridvieweditingcontrolshowingeventargs) handles dgvservices.editingcontrolshowing
if dgvservices.currentcelladdress.x = colservice_rate.index then
_editcell = ctype(e.control, datagridviewtextboxeditingcontrol)
_editcell.selectall()
addhandler _editcell.keypress, new keypresseventhandler(addressof me.editcell_keypress)
end if
end sub
private sub editcell_keypress(byval sender as object, byval e as keypresseventargs)
if ((convert.toint32(e.keychar) < 48 orelse convert.toint32(e.keychar) > 57) andalso convert.toint32(e.keychar) <> 46 andalso convert.toint32(e.keychar) <> 8 andalso convert.toint32(e.keychar) <> 13) then
e.handled = true
else
if ((convert.toint32(e.keychar) = 46) andalso ctype(sender, datagridviewtextboxeditingcontrol).text.indexof(".") <> -1) then
e.handled = true
end if
end if
end sub
private sub dgvservices_cellendedit(byval sender as system.object, byval e as system.windows.forms.datagridviewcelleventargs) handles dgvservices.cellendedit
if e.columnindex = colservice_rate.index andalso e.rowindex > -1 then
dgvservices(e.columnindex, e.rowindex).value = math.round(convert.todecimal(dgvservices(e.columnindex, e.rowindex).value), 2, midpointrounding.awayfromzero)
end if
end sub
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