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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 
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