Setting user data into HTML tags using c#

Question

i've been trying to call a method using javascript onclick(instead of running the code on page_load) to get the data i want to be printed on the page in the right places (in order for the user to edit his information) but i can't figure out how to do it with a static function. i haven't yet learned how to use non-static functions but when i removed the static part it allowed me to access my html tags, but the code ran regardless of whether i called the method or not.

HTML

 <input type="button" onclick="<%GetUserData();%>"/>

Behind code : paymentOptions is the id of the select tag, notnow is the radio for not choosing a payment option, and payment is the radio for choosing a payment option, which then shows the select tag

  static void GetUserData()
{
    string sqlS = "select * from UserInfo where IDD='" + Session["UserId"] + "'and Pass='" + Session["UserPass"] + "'";
    DalAccess dal = new DalAccess(sqlS);
    ds = dal.GetDataSet(sqlS);
    if (ds.Tables[0].Rows.Count == 1)
    {
        DataRow row = ds.Tables[0].Rows[0];


        if (row["PaymentOptions"].ToString() == "NotNow")
        {
            notnow.Checked = true;
        }
        else
        {

            payment.Checked = true;
            switch (row["PaymentOptions"].ToString())
            {
                case "option1": paymentOptions.SelectedIndex = 1;
                    break;
                case "option2": paymentOptions.SelectedIndex = 2;
                    break;
                case "option3": paymentOptions.SelectedIndex = 3;
                    break;
                case "option4": paymentOptions.SelectedIndex = 4;
                    break;
                case "option5": paymentOptions.SelectedIndex = 5;
                    break;
            }
        }
    }

}

It gives me this error: an object reference is required for the nonstatic field method or property

Obviously, i understand what this means, but my question is: How do i access HTML tags in a static method?

Answer 1

您无法从ststic方法访问html，它们仅在实例上可用