后台还原checkboxlit的是否被选中的属性

string company = dtInvestigate.Rows[0]["SurveyCompanyName"].ToString();
string[] strs = company.Split(',');
for (int i = 0; i < strs.Length; i++)
{
foreach (ListItem oItem in ddlSurveyCompanyName.Items)
{
if (strs[i].Trim() == oItem.Value)
{
oItem.Selected = true;
}
}
}