ASP.NET MVC3 WebGrid - 사용자 지정 서버 측 정렬

Question

정렬을 호출하면 내 MVC3 WebGrid 정렬 동작을 재정 의하여 서버 측 정렬 및 데이터 반환을 수행 할 내 컨트롤러를 호출하는 방법이 있습니까?

도움 주셔서 감사합니다.

Answer 1

레코드 수에 대한 정보와 함께 서버 측 정렬 된 데이터를 webgrid에 전달할 수 있습니다. http://msdn.microsoft.com/en-us/magazine/hh288075.aspx에는 유용한 연습이 있습니다. 나는 전달되는 데이터의 양을 최소화하기 위해 데이터베이스 레벨 정렬/필터링/페이징을하고있다. 나는 고객이 가지고있는 70,000 개의 모든 객체를 통과하면 1 페이지의 25를 볼 수 있기 때문에 내 웹 서버가 나를 사랑하지 않을 것이라고 생각합니다. 이것은 IEnumerable 컬렉션을 감싸는 매우 가벼운 뷰 모델을 제외하고는 필요한 모든 것입니다. 일부 추가 페이징 데이터가 있습니다.

웹 그리드는 쿼리 문자열 vars를 사용하여 수행 할 작업을 결정하기 때문에 get 메소드 양식을 사용해야합니다. 그리고 webgrid가 그것을 읽는 방법을 알고있는 방식으로 쿼리 문자열에 정렬 필드/방향을 포함시켜야합니다. 그래서 당신은 로컬 호스트/예/관리/일이 같은 URL을 끝낼 thingName = 하얏트 & 도시 = & 주 = TX & 나라 = & 종류 = 도시 & SORTDIR = ASC

컨트롤러 :

public ActionResult Index(string thingName, string city, string state, string country, int page = 1) 
      { 
       const int pageSize = 25;     
       int totalRecords = 0; 
       IEnumerable<Thing> things = ThingModel.GetPagedSortedLocationsForCustomer(customerId, sort, sortdir, out totalRecords, pageSize, page, thingName, city, state, country); 

       PagedThings viewModel = new PagedThings(pageSize, page, totalRecords, things); 

       return View(viewModel); 
      } 

보기 :

@model ExampleCompany.Area.ViewModels.PagedThings 

@{ 



using (Html.BeginForm("Index", "ThingaMaBob", System.Web.Mvc.FormMethod.Get)) 
{ 

    <label for="ThingName">ThingName</label>@Html.TextBox("ThingName", "") 
    <label for="City">City</label>@Html.TextBox("City", "") 
    <label for="State">State</label>@Html.TextBox("State", "") 
    <label for="Country">Country</label>@Html.TextBox("Country", "") 
    <input type="submit" value="Filter" /> 

    <br /> 
    var grid = new WebGrid(canPage: true, rowsPerPage: Model.PageSize, canSort: true); 
    grid.Bind(Model.Things, rowCount: Model.TotalRows, autoSortAndPage: false); 
    grid.Pager(WebGridPagerModes.All); 

     @grid.GetHtml(htmlAttributes: new { id = "grid"}, 
     columns: grid.Columns(
      //ommitted 
      grid.Column("thingName", "Thing"), 
     )); 

    Html.Hidden(grid.SortFieldName, grid.SortColumn); 
    Html.Hidden(grid.SortDirectionFieldName, grid.SortDirection == SortDirection.Ascending ? "ASC" : "DESC"); 
} 

모델 :

public static IEnumerable<Thing> GetPagedSortedThingsForCustomer(int customerid, String sortby, String sorttype, out int totalRecords, int pageSize, int pageIndex, string thingName, string city, string state, string country) 
     { 
      var tmp = new List<Thing>(); 
      int total = 0; 

      dynamic dr = OurDBUtility.ReturnDR("ExampleProc_GetThingsSortedPaged", ConnectionInfo.ExampleConnection, customerid, sortby, sorttype, pageSize, pageIndex, thingName, city, state, country); 
      { 
       while (dr.Read()) 
       { 
        var tmpThing = new Thing(); 
        tmpThing.LoadFromDr(dr); 
        tmp.Add(tmpThing); 
        if (total == 0) 
        { 
         total = (int)dr["TOTAL_THINGS"]; 
        } 
       } 
      } 
      totalRecords = total; 

      return tmp; 
     } 

동적 SQL과

발동은 - 그래, 당신은 사용할 수 있습니다 또는 당신이 원하는 경우 다른 기술 Linq에-SQL-에,하지만 난 구식이야 : CTE와

CREATE PROCEDURE ExampleProc_GetThingsSortedPaged 
     (@CustomerId int 
     , @sortby nvarchar(60) 
     , @sorttype nvarchar(60) 
     , @pageSize int 
     , @pageIndex int 
     , @thingName nvarchar(255) = null 
     , @city nvarchar(30) = null 
     , @state nvarchar(30) = null 
     , @country char(2) = null 
    ) 
    as 

     DECLARE @strSql  nvarchar(3000) 
     --calculate paging rows 
     declare @startRow int, @endRow int 
     --e.g. if you have a page size of 10, page 1 = 1 - 10, page 2 = 11 -20 
     set @startRow = ((@pageIndex - 1) * @pageSize) + 1 
     set @endRow = @startRow + @pageSize - 1 

     if @thingName = '' 
      set @thingName = null 
     if @city = '' 
      set @city = null 
     if @state = '' 
      set @state = null 
     if @country = '' 
      set @country = null 

     --return total for webgrid, accounting for filter 
     declare @totalThings int 
     select @totalThings = COUNT(*) 
     from EXAMPLE_TABLE T with(nolock) 
     where CUSTOMER_ID = @CustomerId 
      AND (T.THING_NAME LIKE @thingName + '%' OR @thingName is null)    
      AND (T.CITY LIKE @city + '%' or @city is null) 
      AND (T.STATE LIKE @state + '%' or @state is null) 
      AND (T.COUNTRY = @country or @country is null) 



     DECLARE @ParameterDefinition AS NVARCHAR(200) 


     set @ParameterDefinition = '@totalThings int, @CustomerId INT, @startRow INT, @endRow INT, @thingName nvarchar(255), @city nvarchar(30), @state nvarchar(30), @country char(2)' 

     --When we need to do dynamic sql it is better to use paramterization, but you cannot do (ORDER BY @sortBy).  
     SET @strSql = N'SELECT * from 
         (
         select ROW_NUMBER() OVER (ORDER BY T.' + @sortby + ' ' + @sorttype + ') as Row, 
          @totalThings [TOTAL_THINGS], 
          T.THING_ID, T.THING_NAME, T.ADDRESS, T.CITY, T.STATE, 
          T.ZIP_CODE, T.COUNTRY 
         FROM EXAMPLE_TABLE T 
         WHERE T.CUSTOMER_ID = @CustomerId 
          AND (T.THING_NAME LIKE @thingName + ''%'' OR @thingName is null)    
          AND (T.CITY LIKE @city + ''%'' or @city is null) 
          AND (T.STATE LIKE @state + ''%'' or @state is null) 
          AND (T.COUNTRY = @country or @country is null) 
          ) paged 
         where Row between @startRow and @endRow 
         ORDER BY Row' 

     --print @strSql 
     EXECUTE sp_executesql @strSql, @ParameterDefinition, @totalThings, @CustomerId, @startRow, @endRow, @thingName, @city, @state, @country 


    GO 

PROC :

CREATE PROCEDURE ExampleProc_GetThingsSortedPaged 
    (@CustomerID int 
    , @sortby nvarchar(60) 
    , @sorttype nvarchar(60) 
    , @pageSize int = 25 
    , @pageIndex int = 1 
    , @thingName nvarchar(255) = null 
    , @city varchar(30) = null 
    , @state nvarchar(30) = null 
    , @country char(2) = null 
) 
as 



declare @startRow int 
declare @endRow int 

SET @startRow = ((@pageIndex - 1) * @pageSize) + 1; 
SET @endRow = @startRow + @pageSize - 1; 

set @sortby = replace(LOWER(@sortby), '_', '') 
SET @sorttype = LOWER(@sorttype) 

if @sorttype != 'asc' and @sorttype != 'desc' 
begin 
     set @sorttype = 'asc' 
end 

;with cte_things as (
     SELECT 
      CASE 
        WHEN @sortby ='country' AND @sorttype = 'asc' then row_number() over (order by C.COUNTRY_NAME ASC) 
        WHEN @sortby ='country' AND @sorttype = 'desc' then row_number() over (order by C.COUNTRY_NAME DESC) 

        WHEN @sortby ='state' AND @sorttype = 'asc' then row_number() over (order by STATE ASC) 
        WHEN @sortby ='state' AND @sorttype = 'desc' then row_number() over (order by STATE DESC) 

        WHEN @sortby ='city' AND @sorttype = 'asc' then row_number() over (order by CITY ASC) 
        WHEN @sortby ='city' AND @sorttype = 'desc' then row_number() over (order by CITY DESC) 

        WHEN @sortby ='thingname' AND @sorttype = 'desc' then row_number() over (order by THING_NAME DESC) 
        ELSE row_number() over (order by THING_NAME ASC) 
      END AS Row 
      ,T.THING_ID, T.THING_NAME, T.THING_TYPE, T.ADDRESS, T.CITY, T.STATE 
      , T.ZIP_CODE, T.COUNTRY_CODE, C.COUNTRY_NAME, T.PHONE_NUMBER 
      , T.LATITUDE, T.LONGITUDE 
      FROM EXAMPLE_TABLE L 
      join COUNTRIES C 
        on C.COUNTRY_CODE = L.COUNTRY_CODE 
      where 
        T.CUSTOMER_ID = @CustomerId 
        and L.CITY = ISNULL(@city, CITY) 
        and L.STATE = ISNULL(@state, STATE) 
        and L.COUNTRY_CODE = ISNULL(@country, L.COUNTRY_CODE) 
        and L.THING_NAME = ISNULL(@thingName, THING_NAME) 
) 
, cte_total as (select COUNT(*) as TOTAL_THINGS from cte_things) 
, cte_all as (select cte_things.*, cte_total.TOTAL_THINGS from cte_things cross join cte_total) 

SELECT * FROM cte_all 
where 
     Row >= @startRow 
     and Row <= @endRow 
ORDER BY Row 



GO