exams_edit.cshtml

@{
    Layout = "~/_xuejiLayout.cshtml";
    if (Session["name"] == null || Session["username"] == null)
    {
        Response.Redirect("~/#.cshtml");
    }
    var id = Request.QueryString["id"];
    var cid = Request.QueryString["cid"];
    var coid = Request.QueryString["coid"];
    var name1 = Request.QueryString["name"];
    var db = Database.Open("ctXueji");
    var exam = "select * from exams where id=" + id;
    var row = db.QuerySingle(exam);
    if (IsPost)
    {
        var name = Convert.ToString(Request.Form["name"]);
        var date = Request.Form["date"];
        var type = Request.Form["type"];
        //var hours = Request.Form["hours"];
        //var day = Request.Form["day"];
        //var min = Request.Form["min"];
        //var t = date + "-" + hours + "时" + min + "分";
        var update = "update exams set exams_name = @0,exams_date = @1,exams_type=@2 where id = @3";
        db.Execute(update, name, date, type,id);
        //var listexams = "select id from exams where exams_name = @0 and exams_type = " + type;
        //var exid = db.QuerySingle(listexams, name);
        //var liststudents = "select id from students where classes_id = " + cid;
        //var valueexid = exid.id;


        //var Studentsvalue = "select * from coursesArranging where courses_id=" + coid;
        //int coursesArranging__id = 0;
        //foreach (var c in db.Query(Studentsvalue))
        //{
        //    int x = 0;
        //    string p = c.classes_id;
        //    string[] temp = p.Split(',');
        //    foreach (var a in temp)
        //    {

        //        if (a.Trim() == cid)
        //        {
        //            x = 1;
        //            break;
        //        }
        //    }
        //    if (x == 1)
        //    {
        //        coursesArranging__id = c.id;
        //        break;
        //    }
        //}

        //Dictionary<int, int> student_value = new Dictionary<int, int>();


        //foreach (var row in db.Query(liststudents))
        //{
        //    var sid = row.id;
        //    student_value.Add(sid, 0);
        //}

        //var addscores = "insert into scores (exams_id,students_value,coursesArranging_id) values (@0,@1,@2)";
        //db.Execute(addscores, valueexid, Functions.DictionaryToString(student_value), coursesArranging__id);
        Response.Redirect("~/examsall?cid=" + cid + "&coid=" + coid + "&name=" + name1);
    }
}
<link href="~/Content/date.css" rel="stylesheet" />
<script src="~/Scripts/jquery-3.3.1.js"></script>
<script src="~/Scripts/date.js"></script>
<script type="text/javascript">
    $(function () {
        $('#date').date({ theme: "datetime" });
    });
</script>
<form method="post" class="navbar-form">
    <strong>考试名称：</strong><br />
    <input class="form-control" type="text" id="name" name="name" value=@row.exams_name><br />
    <strong>考试日期：</strong><br />
    <input type="text" class="form-control" id="date" name="date" value=@row.exams_date/>
    <br />
    <strong>考试类型：</strong><br />
    <select class="form-control" id="type" name="type">
    <option value=1 @if(row.exams_type == 1){ @:selected="selected" 
                    }>期中考试</option>
    <option value=2 @if(row.exams_type == 2){ @:selected="selected"  
                    }>期末考试</option>
    <option value=3 @if(row.exams_type == 3){ @:selected="selected"  
                    }>其他考试</option>
    </select><br />
    <input class="btn btn-primary" type="submit" value="确认修改" />
</form>
<div id="datePlugin"></div>