最后，我得到了解决方案.将其放入数据转发器并读取用户控件

列表lstObjTempCategoryTime = new List();

Control [] TimeInterval = dataRptCategoryTime.Controls.Find("categoryTImeUsercontrolObj"，true);

foreach(TimeInterval中的var项)

{
CategoryTime objCategoryTime =新的CategoryTime();

DateTimePicker dateTimeStartTime =(DateTimePicker)item.Controls.Find("dtpStartTime"，true).FirstOrDefault();
DateTimePicker dateTimeEndTime =(DateTimePicker)item.Controls.Find("dtpEndTime"，true).FirstOrDefault();

objCategoryTime.EndTime = dateTimeStartTime.Value.ToString();
objCategoryTime.StartTime = dateTimeEndTime.Value.ToString();
lstObjTempCategoryTime.Add(objCategoryTime);

Finally i got the solution.. i placed a user control containing two date picker and place it inside data repeater and read the user control

List lstObjTempCategoryTime = new List();

Control[] TimeInterval = dataRptCategoryTime.Controls.Find("categoryTImeUsercontrolObj", true);

foreach (var item in TimeInterval)

{
CategoryTime objCategoryTime = new CategoryTime();

DateTimePicker dateTimeStartTime = (DateTimePicker)item.Controls.Find("dtpStartTime", true).FirstOrDefault();
DateTimePicker dateTimeEndTime = (DateTimePicker)item.Controls.Find("dtpEndTime", true).FirstOrDefault();

objCategoryTime.EndTime = dateTimeStartTime.Value.ToString();
objCategoryTime.StartTime = dateTimeEndTime.Value.ToString();
lstObjTempCategoryTime.Add(objCategoryTime);