Question

我使用SQL Server数据库作为后端创建了一个ASP.Net项目。我显示以下错误。怎么解决这个问题？

===============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

=========错误讯息============

ExecuteNonQuery: Connection property has not been initialized.

Answer 1

创建SqlCommand时，需要将其与连接关联：

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

Answer 2

试试这个，下面的代码正确地处理了所有非托管资源，并且连接已正确初始化：

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();
    }
}

Answer 3

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

使用ASP.Net的SQL Server 2005中的问题

3 个答案: