专家坐堂-[求助] 错误码Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

以文本方式查看主题

-  Foxtable(狐表)  (http://www.foxtable.com/bbs/index.asp)
--  专家坐堂  (http://www.foxtable.com/bbs/list.asp?boardid=2)
----  [求助] 错误码  (http://www.foxtable.com/bbs/dispbbs.asp?boardid=2&id=161315)

--  作者：sanny
--  发布时间：2021/3/12 21:32:00
--  [求助] 错误码

老师，以下黄色标注的请帮忙更正一下，另外整个代码可以优化吗？感谢。

Dim txt As String = e.Form.Controls("TextBox1").Text
txt = Tables("生产任务单").Current("生产任务单号")
e.Form.Controls("TextBox1").Text = txt

Dim val As Integer
Dim cmd As New SQLCommand
cmd.C
cmd.CommandText = "Se lect top 1 ImageBinary From {SDBC_Sa} Where BarcodeData =\'" & e.Form.Controls("TextBox1").Text & "\'and DATALENGTH(ImageBinary) > 0 and resend = 1,Date2 desc"
Dim dt As DataTable = cmd.ExecuteReader
If dt.datarows.count > 0 Then
Dim imagebytes As Byte() = dt.DataRows(0)("ImageBinary")
Dim stream As System.IO.Stream = New System.IO.MemoryStream(imagebytes)
Dim bmp As System.Drawing.Bitmap = New System.Drawing.Bitmap(stream)
Dim pbx As WinForm.PictureBox = Forms("pic").Controls("PictureBox1")
pbx.Image = bmp

Else

cmd.CommandText = "Sel ect top 1 ImageBinary From {SDBC_Sa} Where BarcodeData =\'" & e.Form.Controls("TextBox1").Text & "\'and DATALENGTH(ImageBinary) > 0"
\'Dim dt As DataTable = cmd.ExecuteReader
If dt.datarows.count > 0 Then
Dim imagebytes As Byte() = dt.DataRows(0)("ImageBinary")
Dim stream As System.IO.Stream = New System.IO.MemoryStream(imagebytes)
Dim bmp As System.Drawing.Bitmap = New System.Drawing.Bitmap(stream)
Dim pbx As WinForm.PictureBox = Forms("pic").Controls("PictureBox1")
pbx.Image = bmp

End If

End If

--  作者：有点蓝
--  发布时间：2021/3/13 9:42:00
--

Dim val As Integer
Dim cmd As New SQLCommand
cmd.C
cmd.CommandText = "Se lect top 1 ImageBinary From {SDBC_Sa} Where BarcodeData =\'" & e.Form.Controls("TextBox1").Text & "\'and DATALENGTH(ImageBinary) > 0 order by resend,Date2 desc"
Dim dt As DataTable = cmd.ExecuteReader
If dt.datarows.count > 0 Then
Dim imagebytes As Byte() = dt.DataRows(0)("ImageBinary")
Dim stream As System.IO.Stream = New System.IO.MemoryStream(imagebytes)
Dim bmp As System.Drawing.Bitmap = New System.Drawing.Bitmap(stream)
Dim pbx As WinForm.PictureBox = Forms("pic").Controls("PictureBox1")
pbx.Image = bmp

End If

--  作者：sanny
--  发布时间：2021/3/13 11:43:00
--
老师，

order by resend 加这个有点不对，我只有有钩的，resend = 1，然后再将Date2 降序操作

--  作者：有点蓝
--  发布时间：2021/3/13 12:13:00
--
这个是结合了1楼2条sql的结果，自己细品一下。测试有什么问题？

--  作者：sanny
--  发布时间：2021/3/13 12:31:00
--
老师，是有点不对，

条件一：取 resend = 1 并且  Date2 的最晚的一条记录

条件二：如果没有 resend = 1 的记录，就取Date2 最早的一条记录。

--  作者：有点蓝
--  发布时间：2021/3/13 14:37:00
--
那还是分2次把，1楼代码不变

cmd.CommandText = "Se lect top 1 ImageBinary From {SDBC_Sa} Where BarcodeData =\'" & e.Form.Controls("TextBox1").Text & "\'and DATALENGTH(ImageBinary) > 0 and resend = 1,Date2 desc"
改为
cmd.CommandText = "Se lect top 1 ImageBinary From {SDBC_Sa} Where BarcodeData =\'" & e.Form.Controls("TextBox1").Text & "\'and DATALENGTH(ImageBinary) > 0 and resend = 1 order by Date2 desc"

--  作者：sanny
--  发布时间：2021/3/13 17:56:00
--
谢谢老师

以下这个黄色不对，可以也帮忙修改一下，谢谢。

Dim fdr As DataRow = dt.Find("BarcodeData=\'" & rr("生产任务单号") & "\' and Resend = 1,Date desc")

--  作者：有点蓝
--  发布时间：2021/3/14 20:09:00
--
参考：http://www.foxtable.com/webhelp/topics/0396.htm