VB.NET数据库怎么用
这篇文章主要为大家展示了“VB.NET数据库怎么用”，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下“VB.NET数据库怎么用”这篇文章吧。
十多年的惠东网站建设经验，针对设计、前端、开发、售后、文案、推广等六对一服务，响应快，48小时及时工作处理。营销型网站的优势是能够根据用户设备显示端的尺寸不同，自动调整惠东建站的显示方式，使网站能够适用不同显示终端，在浏览器中调整网站的宽度，无论在任何一种浏览器上浏览网站，都能展现优雅布局与设计，从而大程度地提升浏览体验。创新互联从事“惠东网站设计”,“惠东网站推广”以来，每个客户项目都认真落实执行。
VB.NET数据库代码示例：
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数据库怎么用”这篇文章的所有内容，感谢各位的阅读！相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注创新互联行业资讯频道！
文章题目：VB.NET数据库怎么用
标题路径：http://pwwzsj.com/article/ppecpc.html
