Question

我试图创建一个搜索页面，它会将结果显示在Gridview中，但是当我点击我的搜索按钮时仍然会收到以下错误：读取器关闭时无效尝试调用Read。

这是我的代码：

Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs)
    Dim connectionString As [String] = ConfigurationManager.ConnectionStrings("myDbConnectionString1").ConnectionString
    Dim connection As New SqlConnection(connectionString)
    connection.Open()

    Dim mySQLQuery As String
    Dim vID As String

    vID = Request.QueryString("pgResults")

    mySQLQuery = "SELECT name,address,results,url FROM myTb WHERE name LIKE '%" + TextBox1.Text + "%'"

    Dim myCommand As New SqlCommand(mySQLQuery, connection)

    Dim myReader1 As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)

    While (myReader1.Read())

        GridView1.DataSource = myReader1
        GridView1.DataBind()

    End While

    panelBody.Visible = False
    panelSearchResults.Visible = True

    connection.Close()
End Sub

我能得到一些帮助吗？

Answer 1

你不能调用Read（）然后使用IDataReader作为DataSource，让DataBinding处理它。试试这个：

Dim myReader1 As SqlDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)

GridView1.DataSource = myReader1
GridView1.DataBind()

读取器关闭时无效尝试调用Read

1 个答案: