Question

在我的Sql表中，索引主键是一个整数（1,2,3，...）我有一个像这样的实体查询：

                var pagedQAs = getAllQAs
                .Where(qa => qa.Show)
                .OrderByDescending(qa => qa.Code)
                .Skip((page - 1) * pageSize).Take(pageSize)
                .Select(QAViewModels.Set)
                .ToList();

结果排序列表如下：

1
11
12
...
2
21
22
...
3
31
32
...

显示正确的有序数字应该是什么？

修改＆GT;＆GT;＆GT;

sql中的表： Table in sql

该项目是Model First Not Code First

型号：

public class QAViewModels
{
    public int Code { get; set; }
    public string Question { get; set; }
    public string InquirerName { get; set; }
    public string InquirerEmail { get; set; }
    public int VisitCounts { get; set; }
    public Nullable<int> Respondent { get; set; }
    public Nullable<System.DateTime> RespondDate { get; set; }
    public string Answer { get; set; }
    public string AnswerSummary { get; set; }

    public virtual BaseMember BaseMember { get; set; }

    public static QAViewModels Set(QuestionAnswer qa)
    {
        return new QAViewModels
        {
            Code = qa.Code,
            Question = qa.Question,
            InquirerName = qa.InquirerName,
            InquirerEmail = qa.InquirerEmail,
            VisitCounts = qa.VisitCounts,
            Respondent = qa.Respondent,
            RespondDate = qa.RespondDate,
            Answer = qa.Answer,
            AnswerSummary = qa.AnswerSummary,

            BaseMember = qa.BaseMember
        };
    }
}

所有类型都基于SQL表文件数据类型

商店：

        public List<QAViewModels> GetAllRawPaged(int page, int pageSize, out int count)
    {
        var getAllQAs = Tools.DataModel.QuestionAnswers;

        count = getAllQAs.Count();
            var pagedQAs = getAllQAs
                .Where(qa => qa.Show)
                .OrderByDescending(qa => qa.Code)
                .Skip((page - 1) * pageSize).Take(pageSize)
                .Select(QAViewModels.Set)
                .ToList();

            return pagedQAs;
    }

对QAStore中存储的数据的操作和查询

控制器：

        public ActionResult CM_QAs()
    {
        QAStore qas = new QAStore();

        int count = 0;

        LabelStore ls = new LabelStore();

        List<TagsViewsModel> tags = ls.GetAllTags();

        List<QAViewModels> allQAs = qas.GetAllRawPaged(1, 100, out count);

        return View(allQAs);
    }

获取所有QuestionAnswers并传递给查看

视图：

@model List<wrrc.Models.QAViewModels>

<div>
    @foreach (var qa in Model)
        {
        <div>
        <span>
            <span>Question Number 
            @Tools.ConvertNumerals(Convert.ToString(qa.Code))
            </span>
        </span>
        <div>@Html.Raw(qa.Question)</div>
        <div>@Tools.TruncateAtWord(qa.Answer, 500)))</div>
        <a href="@Url.Action("SingleQA", "QA" >Full Description</a>
    </div>
}
</div>

Answer 1

您应该将Code排序为int;

var pagedQAs = getAllQAs
    .Where(qa => qa.Show)
    .ToList()
    .OrderByDescending(qa => int.Parse(qa.Code))
    .Skip((page - 1) * pageSize).Take(pageSize)
    .Select(QAViewModels.Set)
    .ToList();

此外，最好防止可能的空值或不正确的字符串来解析整数;

int val = 0;
var pagedQAs = getAllQAs
    .Where(qa => qa.Show)
    .ToList()
    .OrderByDescending(qa => int.TryParse(qa.Code,out val) ? val : Int32.MaxValue)
    .Skip((page - 1) * pageSize).Take(pageSize)
    .Select(QAViewModels.Set)
    .ToList();

此外，使用此查询，您应该在客户端执行order/skip/take操作。无法将int.TryParse或int.Parse转换为IQueryable形式的sql查询。因此，如果您有机会在数据库中将Code列修改为int，则可能是更好的解决方案。

在2之前订购int值11,12,13

1 个答案: