如何查找数据集的行号 vb.net

Question

我正在尝试查找包含字段 "Name" 中的项目 "Rushil" 的数据集的行号。我正在研究如何做到这一点，我遇到了 Datatable.Select 方法。

查找行号的过滤表达式是什么？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服务器

根据你的问题我假设table中只有一个'Rushil'，然后我会告诉你如何获取[=29=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

如何接近答案

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

如何查找数据集的行号 vb.net

How to find the row number of a dataset vb.net

vb.net

dataset