//绑定班级下拉列表 public void DataBindSchoolClassList(DropDownList ddl) { DalOperationAboutEnglishExam doac = new DalOperationAboutEnglishExam(); DataTable dt = doac.GetAllSchoolClass().Tables[0]; schoolClassName = "{"; List<string> schoolClassNameTemp = new List<string>(); ddl.Items.Add(new ListItem("全部班级", "all")); for (int i = 0; i < dt.Rows.Count; i++) { ddl.Items.Add(new ListItem(dt.Rows[i]["className"].ToString().Trim(), dt.Rows[i]["SchoolClassID"].ToString().Trim())); schoolClassNameTemp.Add("\"" + dt.Rows[i]["className"].ToString().Trim() + "\":" + "\"" + dt.Rows[i]["SchoolClassID"].ToString().Trim()+"\""); } schoolClassName += String.Join(",", schoolClassNameTemp.ToArray()); schoolClassName += "}"; }