Dim dt1 As Date=e.Form.Controls("DateTimePicker1").Value Dim dt2 As Date=e.Form.Controls("DateTimePicker2").Value Dim Filter As String If dt1=Nothing Or dt2=Nothing Then MessageBox.Show("起始或结束日期都不能为空!","友情提醒",MessageBoxButtons.OK,MessageBoxIcon.Warning) Else With DataTables("计划采购表") .LoadFilter="日期 >= #" & dt1 & "#" ' And 日期 <= #" & dt2 & "#" .Load() End With