jqgrid和服务器端分页

Question

我意识到有一些相关的问题，但我找不到我在找什么。过去我多次使用jqgrid，但忘记了如何实现服务器端分页。

这里是我的javascript

$("#list").jqGrid({ 
    url: "index.php?loadData=test", 
    datatype: "json", 
    mtype: "GET", 
    colNames: ["id", "eNodeB_unique", "enodeB_type", "radio_freq_mod", "macroEnbId_dec representation", "num_cells"], 
    colModel: [ 
     { name: "id", width: 55 }, 
     { name: "enodeB_unique", width: 90 }, 
     { name: "enodeB_type", width: 80, align: "right" }, 
     { name: "radio_freq_mod", width: 80, align: "right" }, 
     { name: "macroEnbId_dec_rep", width: 80, align: "right" }, 
     { name: "num_cells", width: 150, sortable: false } 
    ], 
    pager: "#pager", 
    rowNum: 10, 
    rowList: [10, 20, 30], 
    sortname: "id", 
    sortorder: "desc", 
    viewrecords: true, 
    gridview: true, 
    autoencode: true, 
    caption: "My first grid", 
    loadonce:false 
}); 

和我的服务器端代码

public function getData($page, $limit, $sidx, $sord){ 

    $query_str = "SELECT COUNT(*) AS count FROM tbl"; 

    $prepState = $this->DBi->prepare($query_str);    
    $result = $this->DBi->query($prepState); 

    $count = $result[0]['count']; 


    if($count > 0 && $limit > 0) { 
     $total_pages = ceil($count/$limit); 
    } else { 
     $total_pages = 0; 
    } 

    if ($page > $total_pages){ 
     $page = $total_pages; 
    } 

    $start = $limit * $page - $limit; 

    if($start < 0){ 
     $start = 0; 
    } 

$query_str = "SELECT * FROM tbl ORDER BY {$sidx} {$sord} LIMIT {$start}, {$limit}"; 

    $prepState = $this->DBi->prepare($query_str);    
    $result = $this->DBi->query($prepState);   

    return $result;  


} 

，如果我一直$开始并在查询$限制的话，我刚刚得到的inital十个结果。如果我把它们拿出来...那么我的网格显示我所有的结果..但是只有一个可用的页面。我有选择点击下一页。

编辑：

还好我现在意识到，我必须返回此信息...我用我不得不返回行的方式感到困惑。 JQgrid总是这样吗？

$query_str = "SELECT * FROM enodeB ORDER BY {$sidx} {$sord} LIMIT {$start}, {$limit}"; 

    $prepState = $this->DBi->prepare($query_str);    
    $result = $this->DBi->query($prepState);   

    $finalRows = array(); 

    foreach($result as $row){ 
     $finalRows[] = array('cell'=> $row); 

    } 
    return array('page' => $page, 'total' => $total_pages, 'records' => $count, 'rows' => $finalRows); 

Answer 1

public static dynamic ToJson<T>(this IEnumerable<T> Collection, string sidx, string sord, string page, string rows, List<string> Columns) 
    { 
     return ToJson<T>(sidx, sord, page, rows, Collection, Columns); 
    } 



    private static dynamic ToJson<T>(string sidx, string sord, string page, string rows, IEnumerable<T> Collection, List<string> Columns) 
    { 
     page = page.NotNull("1"); rows = rows.NotNull("100"); sidx = sidx.NotNull("Id"); sord = sord.NotNull("asc"); 
     int pageIndex = Convert.ToInt32(page) - 1; 
     int pageSize = Convert.ToInt32(rows); 
     int totalRecords = Collection.Count(); 
     int totalPages = (int)Math.Ceiling((float)totalRecords/(float)pageSize); 
     if (!Collection.IsNull()) 
     { 
      Collection = Collection.ToList().OrderWith(x => x.GetPropertyValue(sidx), sord).Skip(pageSize * pageIndex).Take(pageSize); 
      return JsonData<T>(Collection, totalPages, page, totalRecords, Columns); 
     } 
     return BlankJson(); 
    } 


    private static dynamic JsonData<T>(IEnumerable<T> collection, int totalPages, string page, int totalRecords, List<string> Columns) 
    { 

     var colsExpr = Columns.ConvertAll<PropertyInfo>(x => Extentions.GetProperty<T>(x)); 
     var jsonData = new 
     { 
      total = totalPages, 
      page = page, 
      records = totalRecords, 
      rows = collection.Select(row => new { id = row.GetPropertyValue("Id") ?? Guid.NewGuid(), cell = GetValues<T>(colsExpr, row) }), 
     }; 
     return jsonData; 
    } 

    public static dynamic BlankJson() 
    { 
     return new 
     { 
      total = 0, 
      page = 0, 
      records = 0, 
      rows = "", 
     }; 
    } 

    private static string[] GetValues<T>(List<PropertyInfo> columns, T obj) 
    { 

     var values = new List<string>(); 
     try 
     { 
      foreach (var x in columns) 
      { 

       var temp = x.GetValue(obj, null); 
       values.Add(temp != null ? temp.ToString() : string.Empty); 
      } 
      return values.ToArray(); 
     } 
     catch 
     { 
      return values.ToArray(); 
     } 
    }