vb.net-在sql for jtable中使用case select查询

如果有人知道如何在jtable查询中使用case，请查看我的代码

Dim batch_status As String = " case when status = 0 then 'Created' when status = 1 then 'Scanning' when status = 2 then 'Scan Saved' end as status"

cmd.CommandText = "SELECT  * FROM ( SELECT ROW_NUMBER() OVER ( ORDER BY " & jtSorting & "  ) AS RowNum, batch_id, batch_name, date_created, profile_id, total_page, " & batch_status & ", First_ScanID, file_id " & _
                                " FROM [ip_ent_site].[dbo].[tbl_batch] WHERE STATUS IN (0,1,2) ) AS RowConstrainedResult " & _
                            " WHERE  RowNum >= @jtStartIndex AND RowNum < @jtEndIndex ORDER BY RowNum ; "

但以案例为例，并非如此

这里有什么问题

代码的另一部分：

If dt.Rows.Count > 0 Then
    students = (From item In dt.AsEnumerable() Select New Class1 With { _
     .No = Convert.ToInt32(item(1)), _
     .batch_id = Convert.ToInt64(item(2)), _
     .batch_name = DirectCast(item(3), String), _
     .date_created = item(4).ToString, _
     .profile_id = Convert.ToInt32(item(5)), _
     .total_page = Convert.ToInt32(item(6)), _
     .status = Convert.ToInt32(item(7)), _
 .First_ScanID = Convert.ToInt32(item(8)), _
 .file_id = CheckDBNullInteger(item(9)) _
}).ToList()

End If

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使用下面的declare语句

Dim batch_status As String = " case when status = 0 then ''Created'' when status = 1 then ''Scanning'' when status = 2 then ''Scan Saved'' end as status"

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可能是@jtStartIndex和@jtEndIndex有问题。

刚刚找到，请将

.status=Convert.ToInt32（项目（7））

更改为

。status=item（7）。ToString，

---

在Jtable中显示完全不同

您的cmd.CommandText值是多少？你的调试器在说什么？

Dim batch_status As String = " case when status = 0 then ''Created'' when status = 1 then ''Scanning'' when status = 2 then ''Scan Saved'' end as status"