這篇文章主要為大家展示了“VB.NET數(shù)據(jù)庫(kù)怎么用”,內(nèi)容簡(jiǎn)而易懂,條理清晰,希望能夠幫助大家解決疑惑,下面讓小編帶領(lǐng)大家一起研究并學(xué)習(xí)一下“VB.NET數(shù)據(jù)庫(kù)怎么用”這篇文章吧。
十多年的惠東網(wǎng)站建設(shè)經(jīng)驗(yàn),針對(duì)設(shè)計(jì)、前端、開發(fā)、售后、文案、推廣等六對(duì)一服務(wù),響應(yīng)快,48小時(shí)及時(shí)工作處理。營(yíng)銷型網(wǎng)站的優(yōu)勢(shì)是能夠根據(jù)用戶設(shè)備顯示端的尺寸不同,自動(dòng)調(diào)整惠東建站的顯示方式,使網(wǎng)站能夠適用不同顯示終端,在瀏覽器中調(diào)整網(wǎng)站的寬度,無(wú)論在任何一種瀏覽器上瀏覽網(wǎng)站,都能展現(xiàn)優(yōu)雅布局與設(shè)計(jì),從而大程度地提升瀏覽體驗(yàn)。創(chuàng)新互聯(lián)從事“惠東網(wǎng)站設(shè)計(jì)”,“惠東網(wǎng)站推廣”以來(lái),每個(gè)客戶項(xiàng)目都認(rèn)真落實(shí)執(zhí)行。
VB.NET數(shù)據(jù)庫(kù)代碼示例:
Imports System
Imports System.Data
Imports System.Data.SqlClient
public Class MainClassclass MainClass
Shared Sub Main()Sub Main()
Dim thisConnection As New SqlConnection
("server=(local)\SQLEXPRESS;" & _
"integrated security=sspi;database=
MyDatabase")
' Sql Query
Dim sql As String = "SELECT *
FROM Employee "
Dim insertSql As String = "INSERT
INTO Employee " & _
"(ID, FirstName, LastName)VALUES" & _
"(@ID, @FirstName, @LastName)"
Try
' Create Data Adapter
Dim da As New SqlDataAdapter
da.SelectCommand = New SqlCommand
(sql, thisConnection)
' Create and fill Dataset
Dim ds As New DataSet
da.Fill(ds, "Employee")
' Get the Data Table
Dim dt As DataTable = ds.Tables
("Employee")
' Display Rows Before Changed
Console.WriteLine("Before altering
the dataset")
For Each row As DataRow In dt.Rows
Console.WriteLine("{0} | {1} | {2}", _
row("ID").ToString().PadRight(10), _
row("FirstName").ToString().PadRight(10), _
row("LastName"))
Next
' Add A Row
Dim newRow As DataRow = dt.NewRow()
newRow("FirstName") = "Edna"
newRow("LastName") = "Everage"
newRow("ID") = "2"
dt.Rows.Add(newRow)
' Display Rows After Alteration
Console.WriteLine("=========")
Console.WriteLine("After
altering the dataset")
For Each row As DataRow In dt.Rows
Console.WriteLine("{0} | {1} | {2}", _
row("ID").ToString().PadRight(10), _
row("FirstName").ToString().PadRight(10), _
row("LastName"))
Next
' Insert employees
' 1. Create command
Dim insertCmd As New SqlCommand
(insertSql, thisConnection)
' 2. Map parameters
insertCmd.Parameters.Add("@FirstName", _
SqlDbType.NVarChar, 10, "FirstName")
insertCmd.Parameters.Add("@LastName", _
SqlDbType.NVarChar, 20, "LastName")
insertCmd.Parameters.Add("@ID", _
SqlDbType.Int, 15, "ID")
' 3. Insert employees
da.InsertCommand = insertCmd
da.Update(ds, "Employee")
Catch ex As SqlException
' Display error
Console.WriteLine("Error: "
& ex.ToString())
Finally
' Close Connection
thisConnection.Close()
Console.WriteLine("Connection
Closed")
End Try
End Sub
End Class
以上是“VB.NET數(shù)據(jù)庫(kù)怎么用”這篇文章的所有內(nèi)容,感謝各位的閱讀!相信大家都有了一定的了解,希望分享的內(nèi)容對(duì)大家有所幫助,如果還想學(xué)習(xí)更多知識(shí),歡迎關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道!
文章名稱:VB.NET數(shù)據(jù)庫(kù)怎么用
文章地址:http://jinyejixie.com/article32/ppecpc.html
成都網(wǎng)站建設(shè)公司_創(chuàng)新互聯(lián),為您提供電子商務(wù)、小程序開發(fā)、網(wǎng)站設(shè)計(jì)公司、標(biāo)簽優(yōu)化、域名注冊(cè)、云服務(wù)器
聲明:本網(wǎng)站發(fā)布的內(nèi)容(圖片、視頻和文字)以用戶投稿、用戶轉(zhuǎn)載內(nèi)容為主,如果涉及侵權(quán)請(qǐng)盡快告知,我們將會(huì)在第一時(shí)間刪除。文章觀點(diǎn)不代表本網(wǎng)站立場(chǎng),如需處理請(qǐng)聯(lián)系客服。電話:028-86922220;郵箱:631063699@qq.com。內(nèi)容未經(jīng)允許不得轉(zhuǎn)載,或轉(zhuǎn)載時(shí)需注明來(lái)源: 創(chuàng)新互聯(lián)
營(yíng)銷型網(wǎng)站建設(shè)知識(shí)