调用按钮事件 Button1.PerformClick()
DateDiff 函数用于计算两日期时间的差值,计算方法是date2 - date1 (网上抄的,应该正确)
然而我更倾向于直接用减法的,直观,不会弄错:CInt((Today.Date - CDate(date1)).Days.ToString)
vb取得昨天的日期:DateAdd("d", -1, Now),或者直接用 用date-1
让DataGridView 选择最后一行
DataGridView1.ClearSelection() '清除之前选择
DataGridView1.Rows(DataGridView1.RowCount - 2).Selected = True
DataGridView1.FirstDisplayedScrollingRowIndex = DataGridView1.RowCount - 2
'筛选、GroupBy买家用户名并且是时间最早的那一单
dt2 = aa.CreateReadOnlyDataTableBySQL("SELECT * FROM (SELECT min([日期]) AS indexfield,[买家用户名] FROM [order] " & tmpSQLStr & " GROUP BY [买家用户名]) AS aaa ORDER BY aaa.indexfield")
在程序运行中生成的按钮怎样编写单击事件
先在窗体中添加函数:
Private Sub Bu_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
End Sub
然后
Dim bu As New Windows.Forms.Button
AddHandler bu.Click, AddressOf Me.Bu_Click
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'获得网页源代码