vbnet資料庫更新資料庫
很慢。根據查詢vbnet相關資料得知,vbnet更耐稿鉛新sql資料庫速度是很慢的。vbnet的sql語昌好句能查詢到庫中的數據,敬仿但是速度是相當的慢。
⑵ VB.NET,將數據從dataset中刪除了,如何更新到資料庫
需要聲明使用CommandBuilder對象猛源,你是 SQL 資料庫還是 ACCESS 資料庫,這兩者的對象不一樣的團知昌。
對於:SQL server
Dim Mybuilder As SqlCommandBuilder = New SqlCommandBuilder(da)
da.Update(dt) '塌扒使用Update方法實現更新到資料庫
對於:ACCESS
Dim Mybuilder As OleDbCommandBuilder = New OleDbCommandBuilder(da)
da.Update(dt) '使用Update方法實現更新到資料庫
⑶ VB.NET access資料庫更新語句怎麼寫
SQL語句:
"update人事set[年齡]=[年齡]-1where身份證='"&TxtID.Text&"'"
⑷ vb.net中向資料庫寫入數據後如何更新(急,在線等)
Private Sub Button3_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button3.Click
Dim shkcode1 As String
Dim shimei1 As String
Dim inymd1 As String
Dim sqlstr As String
' Dim dr As DataRow
shkcode1 = DataGridView1.Rows(4).Cells(0).Value
shimei1 = DataGridView1.Rows(4).Cells(1).Value
inymd1 = DataGridView1.Rows(4).Cells(2).Value
sqlstr = " insert into EA_M1施設職員(shkcode,shimei,inymd) values ('" & shkcode1 & "','" & shimei1 & "','" & inymd1 & "')"
Dim connection As New OracleConnection("連接字元串")
Dim cmd As New OracleCommand(sqlstr, connection)
Try
connection.Open()
Dim rows As Integer = cmd.ExecuteNonQuery()
if rows > 0 then
'說明執行成功了.可以做之後的操作
end if
Catch E As System.Data.OracleClient.OracleException
connection.Close()
Throw New Exception(E.Message)
End Try
end sub
ps:建議去學學ADO.Net 不難的.
⑸ VB.NET用UpdateCommand更新資料庫
Try
objconn.Open()
Dim dt As New DataTable
Dim strsql = "select * from Info"搜洞
objadap.SelectCommand = New OleDb.OleDbCommand(strsql, objconn)
objadap.Fill(objDSet, "Info")
objDSet.Clear()
Dim cmdbuilder As New OleDb.OleDbCommandBuilder(objadap)
objadap.UpdateCommand = cmdbuilder.GetUpdateCommand()
『此慶中處修改數據
objadap.Update(objDSet.Tables("Info"))
objconn.Close()
MsgBox("保存成功", , "提示"譽漏山) '******
Catch ex As Exception
MsgBox(Err.Description, MsgBoxStyle.Critical, Err.Number)
End Try