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我正在关注 Oleg 的一个示例，该示例使用 jqGrid 中的 filterToolbar 来执行服务器端搜索/过滤。搜索名称时，filteredQuery.Count() 行会引发错误，但似乎与 FormatMapping 有关。当我执行“eq” - 相等搜索时，我没有收到错误，但在执行“cn” - 包含搜索时会出现错误。几乎就像格式字符串存在问题一样，但是这个确切的代码在它所取自的示例代码中可以正常工作。我正在使用 ASP.NET MVC 4。任何帮助将不胜感激。谢谢！！

public JsonResult DynamicGridData(string sidx, string sord, int page, int rows, bool _search, string filters)
    {
        var context = new NonTaxContext();
        var objectContext = ((IObjectContextAdapter)context).ObjectContext;
        var set = objectContext.CreateObjectSet<Team>();

        var serializer = new JavaScriptSerializer();

        Filters f = (!_search || string.IsNullOrEmpty(filters)) ? null : serializer.Deserialize<Filters>(filters);

        ObjectQuery<Team> filteredQuery =
        (f == null ? (ObjectQuery<Team>)set : f.FilterObjectSet((ObjectQuery<Team>)set));

        filteredQuery.MergeOption = MergeOption.NoTracking; // we don't want to update the data

        var totalRecords = filteredQuery.Count();

        var pagedQuery = filteredQuery.Skip("it." + sidx + " " + sord, "@skip",
                                            new ObjectParameter("skip", (page - 1) * rows))
                                     .Top("@limit", new ObjectParameter("limit", rows));

        // to be able to use ToString() below which does NOT exist in the LINQ to Entity
        var queryDetails = (from item in pagedQuery
                            select new { item.TeamId, item.Code, item.Name }).ToList();

        return Json(new
        {
            total = (totalRecords + rows - 1) / rows,
            page,
            records = totalRecords,
            rows = (from item in queryDetails
                    select new[] {
                                    item.TeamId.ToString(),
                                    item.Code,
                                    item.Name
                                }).ToList()
        });
    }

private static readonly string[] FormatMapping = {
        "(it.{0} = @p{1})",                 // "eq" - equal
        "(it.{0} <> @p{1})",                // "ne" - not equal
        "(it.{0} < @p{1})",                 // "lt" - less than
        "(it.{0} <= @p{1})",                // "le" - less than or equal to
        "(it.{0} > @p{1})",                 // "gt" - greater than
        "(it.{0} >= @p{1})",                // "ge" - greater than or equal to
        "(it.{0} LIKE (@p{1}+'%'))",        // "bw" - begins with
        "(it.{0} NOT LIKE (@p{1}+'%'))",    // "bn" - does not begin with
        "(it.{0} LIKE ('%'+@p{1}))",        // "ew" - ends with
        "(it.{0} NOT LIKE ('%'+@p{1}))",    // "en" - does not end with
        "(it.{0} LIKE ('%'+@p{1}+'%'))",    // "cn" - contains
        "(it.{0} NOT LIKE ('%'+@p{1}+'%'))" //" nc" - does not contain
    };
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1 回答 1

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您使用的是什么技术堆栈？我个人不得不修改该示例，因为我无法使用“LIKE”关键字，因为它正在使用 Linq/Entity Frameworks 进行翻译，并且不得不将我"cn"的转换为

 "(it.{0}.ToLower().Contains(@{1}.ToLower()))",// "cn" - contains
于 2013-03-07T23:38:02.003 回答