SQL Server 2005中使用ASP.Net的問題

Question

我創建了一個使用SQL Server數據庫作爲後端的ASP.Net項目。我顯示以下錯誤。如何解決這個問題？

===============編碼

Imports System.Data.SqlClient 

Partial Class Default2 

    Inherits System.Web.UI.Page 

    Dim myConnection As SqlConnection 


    Dim myCommand As SqlCommand 
    Dim ra As Integer 

    Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click 

     myConnection = New SqlConnection("Data Source=JANANI-FF079747\SQLEXPRESS;Initial Catalog=new;Persist Security Info=True;User ID=sa;Password=janani") 'server=localhost;uid=sa;pwd=;database=pubs") 

     myConnection.Open() 

     myCommand = New SqlCommand("Insert into table3 values 'janani','jan'") 

     ra = myCommand.ExecuteNonQuery() ========---> error is showing here 

     MsgBox("New Row Inserted" & ra) 

     myConnection.Close() 

    End Sub 

End Class 

=========錯誤消息============

ExecuteNonQuery: Connection property has not been initialized. 

Answer 1

當你創建一個SqlCommand，它需要與連接相關聯：

myCommand = 
    New SqlCommand("Insert into table3 values 'janani','jan'", myConnection); 

Answer 2

myCommand = New SqlCommand("Insert into table3 values 'janani','jan'", myConnection) 

Answer 3

次嘗試是，下面的代碼正確地處理任何非託管資源，連接已正確初始化：

using (SqlConnection dataConnection = new SqlConnection(connectionString)) 
{ 
    using (SqlCommand dataCommand = dataConnection.CreateCommand()) 
    { 
     dataCommand.CommandText = "Insert into table3 values 'janani','jan'" 

     dataConnection.Open(); 
     dataCommand.ExecuteNonQuery(); 
     dataConnection.Close(); 
    } 
}