在一个按钮中调用多个会话

Question

我有一个gridview rowCommand，它将在触发时获取行的索引。然后，我需要检索索引的所有值，以便包含在按钮update语句的where爪中。我使用多个会话来尝试，但它不起作用。这是我的密码。

    protected void gvawards_RowCommand(object sender, GridViewCommandEventArgs e)
    {
                    btnsaveawards.Visible = true;
                    if (e.CommandName == "Name")
                    {
                        int index = Convert.ToInt32(e.CommandArgument);
                        dremployer2.SelectedItem.Text = gvawards.Rows[index].Cells[1].Text;
                        txtawardtitle.Text = gvawards.Rows[index].Cells[2].Text;
                        txtyearawarded.Text = gvawards.Rows[index].Cells[3].Text;
                        Session["Employer2"] = dremployer2.SelectedValue;
                        Session["Award"] = txtawardtitle.Text;
                        Session["YearAwarded"] = txtyearawarded.Text;

                    }
    }

    protected void btnsaveawards_Click(object sender, EventArgs e)
    {
        int employer2 = int.Parse(Session["Employer2"].ToString());
        string awardtitle = Session["Award"].ToString();
        int yearawarded = int.Parse(Session["YearAwarded"].ToString());
        btnsaveawards.Visible = false;
        con.Open();
        string update = "update tblAwardsData set EmployerID='" + dremployer2.SelectedValue + "',AwardTitle='" + txtawardtitle.Text + "',YearAwarded='" + txtyearawarded.Text + "' where  EmployerID='" + employer2 + "' and AwardTitle='" + awardtitle + "' and YearAwarded='" + yearawarded + "' and IDNumber='" + 11277718 + "'";
        SqlCommand scmupdate = new SqlCommand(update, con);
        scmupdate.ExecuteNonQuery();
        view(); //Rebind the gridview
        dremployer2.SelectedItem.Text = "Select employer";
        txtawardtitle.Text = "";
        txtyearawarded.Text = "".ToString(); ;
        con.Close();
    }

Answer 1

我不知道什么不适合你，但这肯定行不通：

 dremployer2.SelectedItem.Text = gvawards.Rows[index].Cells[1].Text;

您只分配文本，选定的值仍然是旧的。你应该这样做：

dremployer2.SelectedIndex = dremployer2.Items.IndexOf(dremployer2.Items.FindByText(  gvawards.Rows[index].Cells[1].Text));

因此，当您在会话中保存正确的选定值时：

Session["Employer2"] = dremployer2.SelectedValue;