我目前正在使用Page_Load中的以下代码创建和读取DataTable

protected void Page_Load(object sender, EventArgs e)
{
    if (Session["AllFeatures1"] == null)
    {
        Session["AllFeatures1"] = GetData();
    }
    table = (DataTable)Session["AllFeatures1"];
    DayPilotCalendar1.DataSource = Session["AllFeatures1"];
    DayPilotNavigator1.DataSource = Session["AllFeatures1"];

    if (!IsPostBack)
    {
        DataBind();
        DayPilotCalendar1.UpdateWithMessage("Welcome!");
    }

    if (User.Identity.Name != "")
    {
        Panel1.Visible = true;
    }
}

我想知道如何转换此代码，以便它从SQL查询中读取？我正在尝试下面的代码，但不确定如何连接它们，以便页面加载中的数据表使用下面的SQL命令填充。

SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["BarManConnectionString"].ConnectionString);
conn.Open();
string query = "SELECT * FROM [EventOne]";

SqlCommand cmd = new SqlCommand(query, conn);

DataTable t1 = new DataTable();
using (SqlDataAdapter a = new SqlDataAdapter(cmd))
{
    a.Fill(t1);
}

我被困在：

table = (DataTable)Session["AllFeatures1"];

我希望成为 t1 = (DataTable)Session["AllFeatures1];