c# – 如何使用SQL表填写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;
    }
}

我想知道如何转换这个代码,以便它从SQL查询读取？我正在尝试下面的代码,但我不知道如何连接它们,以便我的页面加载中的datatable填充下面的SQL命令.

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);
}