SQL Server 2005中使用ASP.Net的问题

Question

我创建了一个使用SQL Server数据库作为后端的ASP.Net项目。我显示以下错误。如何解决这个问题？

===============编码

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 

=========错误消息============

ExecuteNonQuery: Connection property has not been initialized. 

Answer 1

当你创建一个SqlCommand，它需要与连接相关联：

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

Answer 2

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

Answer 3

次尝试是，下面的代码正确地处理任何非托管资源，连接已正确初始化：

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(); 
    } 
}