Question

ALTER procedure [dbo].[carcallvalidation]
@carid nvarchar(100)=null
as 
begin
   select t.TBarcode, t.Paid,t.Status,t.DelDate from Transaction_tbl t where TBarcode=@carid
   declare @transid integer=null
   select @transid= t1.transactID from Transaction_tbl t1 where TBarcode=@carid
   select count(k.transactid) transid from KHanger_tbl k where k.transactid=@transid
end

执行存储过程时我会这样出来：

Tbarcode   paid status
1111         0    2

Transid
2

如何在vb.net中获取Transid值？

我像这样获取第一行值：

 Dim cmdcarvalidation As New SqlCommand("carcallvalidation", con.connect)
 cmdcarvalidation.CommandType = CommandType.StoredProcedure
 cmdcarvalidation.Parameters.Add("@carid", SqlDbType.VarChar, 50, ParameterDirection.Input).Value = txtTicket.Text
 dr = cmdcarvalidation.ExecuteReader
 While dr.Read
    tbarcode=dr("Tbarcode")
    payd= dr("paid")
    status= dr("status")
 end while

Answer 1

SqlDataReader.NextResult Method

当您有多个结果集时，

NextResult用于移动到下一个结果集 - 默认情况下，读者位于第一个结果集。

所以：

While dr.Read()
    tbarcode = dr("Tbarcode")
    payd = dr("paid")
    status = dr("status")
End While

dr.NextResult()

While dr.Read()
    transid = dr(0)
End While

dr.NextResult()

While dr.Read()
    transid_count = dr(transid)
End While

如果您只想要存储过程中的第1和第3个结果（跳过SELECT @transid结果集），则省略第二个dr.Read()：

While dr.Read()
    ' process first result set
End While

dr.NextResult()
dr.NextResult()

While dr.Read()
    ' process the third result set
End While

从vb.net中的存储过程中获取第二行值

1 个答案: