刘金玉的零基础VB教程084期：mshflexgrid联动数据库删除

刘金玉编程

发布于 2020-04-07 17:35:05

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发布于 2020-04-07 17:35:05

文章被收录于专栏：编程创造城市

视频讲解

https://v.qq.com/x/page/g09425lhzcx.html

文字讲解

刘金玉的零基础VB教程084期：

mshflexgrid联动数据库删除

Mshflexgrid属性运用

MSHFlexGrid1.Row 返回当前选中的行号

MSHFlexGrid1.TextMatrix(MSHFlexGrid1.Row, 0)代表返回指定行的第一列的值

删除后的刷新思想

1、数据库删除后，重新进行一遍查询（不推荐，消耗性能大）

2、数据库删除后，直接在mshflexgrid上面进行删除指定行，使用语句MSHFlexGrid1.RemoveItem MSHFlexGrid1.Row

RemoveItem方法后面添加一个索引值，就可以删除指定行

课堂总结

1、掌握两种删除后刷新数据的思想

2、使用RemoveItem方法的时候，删除时候要注意sql语句必须在前面，因为必须要先获取到实际要删除的ID值

文件列表：

界面：

源代码：

Option Explicit
Dim sql As String
Dim conn As New ADODB.Connection
Dim rs As ADODB.Recordset

Private Sub Command1_Click()
If conn.State = 0 Then
    conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\Database3.mdb;Persist Security Info=False"
    conn.Open
End If

sql = "insert into [users]([username],[password]) values('" & Text1.Text & "','" & Text2.Text & "')"

Set rs = New ADODB.Recordset

rs.Open sql, conn, adOpenKeyset, adLockBatchOptimistic
'MsgBox "录入成功！"

sql = "select * from users"
rs.Open sql, conn, adOpenKeyset, adLockBatchOptimistic


Set MSHFlexGrid1.DataSource = rs

'表头
MSHFlexGrid1.TextMatrix(0, 0) = "唯一编号"
MSHFlexGrid1.TextMatrix(0, 1) = "账号"
MSHFlexGrid1.TextMatrix(0, 2) = "密码"

End Sub

Private Sub Command2_Click()
If conn.State = 0 Then
    conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\Database3.mdb;Persist Security Info=False"
    conn.Open
End If

Set rs = New ADODB.Recordset
sql = "select * from users"
rs.Open sql, conn, adOpenKeyset, adLockBatchOptimistic

Set MSHFlexGrid1.DataSource = rs

'表头
MSHFlexGrid1.TextMatrix(0, 0) = "唯一编号"
MSHFlexGrid1.TextMatrix(0, 1) = "账号"
MSHFlexGrid1.TextMatrix(0, 2) = "密码"
End Sub

Private Sub Command3_Click()

If conn.State = 0 Then
    conn.ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & App.Path & "\Database3.mdb;Persist Security Info=False"
    conn.Open
End If

Set rs = New ADODB.Recordset

sql = "delete from [users] where [id]=" & MSHFlexGrid1.TextMatrix(MSHFlexGrid1.Row, 0)

rs.Open sql, conn, adOpenKeyset, adLockBatchOptimistic

'Call Command2_Click   '方法1

'方法2

MSHFlexGrid1.RemoveItem MSHFlexGrid1.Row

End Sub

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原始发表：2020-03-31，如有侵权请联系 cloudcommunity@tencent.com 删除

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