C# 如何将字符串中的单词转换为下拉列表数据项asp.net

在assign.aspx页面中，我有

    foreach (ListItem li in CheckBoxList1.Items)
    {
        if (li.Selected)
        {
            str1+=li.Value+" ";
        }

    }                
    sql = " insert into assgnmovie values ('"+mvnm+"','"+thnm+"','"+date+"','"+str1+"')";
    SqlDatabase.Insert(sql);

} 现在进入booking.aspx页面

protected void ddlMov_SelectedIndexChanged(object sender, EventArgs e)
{
    DataSet ds = new DataSet();
    SqlDataAdapter adp = new SqlDataAdapter("select thname from assgnmovie where mvname='"+ddlMov.SelectedItem.Value+"'",con);
    adp.Fill(ds);
    ddlTheater.DataSource = ds;
    ddlTheater.DataValueField = "thname";
    ddlTheater.DataBind();
    ddlTheater.Items.Insert(0, new ListItem("SELECT", "0"));
}


protected void ddlTheater_SelectedIndexChanged(object sender, EventArgs e)
{
    DataSet ds = new DataSet();
    SqlDataAdapter adp = new SqlDataAdapter("select showtime from assgnmovie where mvname='"+ddlMov.SelectedItem.Value+"' and thname='"+ddlTheater.SelectedItem.Value+"'",con);
    String a = adp.ToString();
    String b = a.Substring(1, 6);
    ddlShow.Text = b;
     adp.Fill(ds);

---

如何拆分字符串并将单词作为ddlshow.list的数据集？？？

尝试以下操作：

protected void ddlTheater_SelectedIndexChanged(object sender, EventArgs e)
{
    DataSet ds = new DataSet();
    SqlDataAdapter adp = new SqlDataAdapter("select showtime from assgnmovie where mvname='"+ddlMov.SelectedItem.Value+"' and thname='"+ddlTheater.SelectedItem.Value+"'",con);
    String a = adp.ToString();
    String b = a.Substring(1, 6);
    ddlShow.Text = b;
    adp.Fill(ds);

    ddlTheater.DataSource = ds;
    ddlTheater.DataValueField = "showtime";
    ddlTheater.DataBind();
 }

---

你是否被困在如何从空格分隔的字符串中获取不同的“单词”上？如果是这样的话：查找string.split（“”）好吧，即使我成功地拆分了单词，我如何让它们填充dropdownlist？？？