ASP.NET

protected void btnAdd_Click(object sender, EventArgs e)
{
    //This button will add the Magazine Code, Magazine Name, Issue Date and OnSale Date to the data grid.
    txtOnSaleDate.Text = "";
    dt = ds.Tables["Schedule"];
    DataRow row = dt.NewRow();
    row["code"] = ddlMagazines.SelectedValue;
    row["name"] = ddlMagazines.SelectedItem.Text;
    if (lstIssueDate.SelectedItem != null)
    {
        if (txtOnSaleDate.Text == "")
        {
            row["issue"] = lstIssueDate.SelectedItem.Text;
            row["onsale"] = lstIssueDate.SelectedValue;
        }
        else
        {
            row["issue"] = "1/1/1980";
            row["onsale"] = txtOnSaleDate.Text;
        }
    }
    else
    {
        row["issue"] = "1/1/1980";
        row["onsale"] = txtOnSaleDate.Text;
    }
    dt.Rows.Add(row);

    wgScheduleList.DataSource = dt;
    wgScheduleList.DataBind();
    wgScheduleList.Visible = true;
    btnSave.Visible = true;
    btnDone.Visible = true;
}