Question

我正在尝试查找包含该项目的数据集的行号＆＃34; Rushil＆＃34;在现场＆＃34;姓名＆＃34;。我正在研究如何做到这一点，我遇到了Datatable.Select方法。

过滤器表达式是什么来查找行号？我将如何在vb.net中执行此操作？

Answer 1

使用 vb.Net

'assume that you want to start indexing from 1
Dim rowNum As Integer
rowNum = 0
For Each row As DataRow In dtDataTable.Rows
    If LCase(Trim(row.Item("Name"))) = LCase("Rushil") Then
        Exit For
    End If
    rowNum += 1
Next row
If rowNum > 0 Then
    MsgBox("Rushil was found at " + Str(rowNum + 1))
Else
    MsgBox("Rushil was not found")
End If

使用 SQL SERVER

根据你的问题，我假设表格中只有一个'Rushil'，然后我会告诉你如何获得表格中单行的行号。

select rank 
from(select rank() OVER (ORDER BY e.[name]) as rank,e.[name] 
from example e)z 
where [name]= 'Rushil'

/* result : */

rank    
2

如何处理答案

create table example(
    [name] varchar(10),
    password varchar(8)
)

insert into example values('veteranlk','password')
insert into example values('sqlfiddle','wasspord')
insert into example values('Gholkar','qwedsadd')
insert into example values('Rushil','ssdwwaaa')
insert into example values('Shirul','wasspord')

select rank() OVER (ORDER BY e.[name]) as rank,e.[name]
from example e
order by rank

/* result : */

rank    name
1       Gholkar
2       Rushil
3       Shirul
4       sqlfiddle
5       veteranlk

如何查找数据集vb.net的行号

1 个答案: