我用的是阿里云sql数据库，在datacolchanged代码如下
If e.DataCol.Name = "创建日期" Then
If e.DataRow.IsNull("创建日期") Then
e.DataRow("退货单编号") = Nothing
Else
Dim d As Date = e.DataRow("创建日期")
Dim y As Integer = d.Year
Dim m As Integer = d.Month
Dim Days As Integer = Date.DaysInMonth(y, m)
Dim fd As Date = New Date(y, m, 1)
Dim ld As Date = New Date(y, m, Days
Dim bh As String = "TC" & Format(d, "yyyyMM")
If e.DataRow("退货单编号").StartsWith(bh) = False Then
Dim max As String
Dim idx As Integer
max = e.DataTable.SQLCompute("Max(退货单编号)", "创建日期 >= '" & fd & "' And 创建日期 <= '" & ld & "' And [_Identify] <> " & e.DataRow("_Identify")) '取得该月的最大编号
If max > "" Then
idx = CInt(max.Substring(8, 4)) + 1
Else
idx = 1
End If
e.DataRow("退货单编号") = bh & Format(idx, "0000")
End If
End If
e.DataRow.save()
End If
新增行后，并不会自动保存，我不清楚问题出在哪里，请专家帮忙看一下问题出在哪，谢谢！
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Post By：2024/3/2 21:20:00 [显示全部帖子]
