已添加具有相同键的项 向数据库添加网格值时出现问题

您应该为每一行创建新的字典。喜欢：

protected void btnSave_Click(object sender, EventArgs e)
        {  string Check=string.Empty;
            string BranchID = dpbranch.SelectedValue;
            string ClassID = dpClassName.SelectedValue;
            string SectionID = dpsection.SelectedValue;
            TestSchool.SchoolBusinessLyr.SchoolBizClient Attendance = new TestSchool.SchoolBusinessLyr.SchoolBizClient();
            System.Collections.Generic.Dictionary<string, string> AssignStudentAttendance;
            DataSet ds = new DataSet();
            foreach (GridViewRow row in gdstudentattendance.Rows)
            {
                //Create new dictionary for each row
                AssignStudentAttendance = new System.Collections.Generic.Dictionary<string, string>();
                String cellText = row.Cells[0].Text;
                String RegisterNo = row.Cells[2].Text;
                int rowIndex = 0;
                for (int i = 0; i < gdstudentattendance.Rows.Count; i++)
                {
                    //extract the TextBox values
                    CheckBox StudentAttendance = (CheckBox)gdstudentattendance.Rows[i].Cells[i].FindControl("chkattendance");
                  if(StudentAttendance.Checked==true)
                  {
                      Check="true";
                  }
                  else
                  {
                       Check="false";
                  }
                    AssignStudentAttendance.Add("BranchID", BranchID);
                    AssignStudentAttendance.Add("ClassID", ClassID);
                    AssignStudentAttendance.Add("SectionID", SectionID);
                    AssignStudentAttendance.Add("StudentID", cellText.ToString());
                    AssignStudentAttendance.Add("RegisterNo", RegisterNo.ToString());
                    AssignStudentAttendance.Add("Attendance", Check.ToString());
                    Attendance.InsertStudentAttendance(AssignStudentAttendance);
                }
            }
        }