JQGrid不显示数据

我为JQgrid和ASP.net创建了客户端和服务器端。网格显示但没有数据。我看不到结果。网格显示但没有数据。JQGrid不显示数据

服务器端编码

using System; 
    using System.Collections.Generic; 
    using System.Collections.ObjectModel; 
    using System.Data; 
    using System.Data.SqlClient; 
    using System.Web; 
    using System.Web.Script.Serialization; 

    namespace sample 
    { 
     public struct JQGridResults 
     { 
      public int page; 
      public int total; 
      public int records; 
      public JQGridRow[] rows; 

     } 
     public struct JQGridRow 
     { 
      public int id; 
      public string[] cell; 
     } 

     [Serializable] 
     public class User 
     { 
      public int UserID 
      { get; set; } 

      public string UserName 
      { get; set; } 

      public string FirstName 
      { get; set; } 

      public string MiddleName 
      { get; set; } 

      public string LastName 
      { get; set; } 

      public string EmailID 
      { get; set; } 
      /// <summary> 
      /// Summary description for jqgridhandler 
      /// </summary> 
      public class jqGridHandler : IHttpHandler 
      { 

       public void ProcessRequest(HttpContext context) 
       { 
        HttpRequest request = context.Request; 
        HttpResponse response = context.Response; 

        string _search = request["_search"]; 
        string numberOfRows = request["rows"]; 
        string pageIndex = request["page"]; 
        string sortColumnName = request["sidx"]; 
        string sortOrderBy = request["sord"]; 


        int totalRecords; 
        Collection<User> users = GetUsers(numberOfRows, pageIndex, sortColumnName, sortOrderBy, out totalRecords); 
        string output = BuildJQGridResults(users, Convert.ToInt32(numberOfRows), Convert.ToInt32(pageIndex), Convert.ToInt32(totalRecords)); 
        response.Write(output); 
       } 

       private string BuildJQGridResults(Collection<User> users, int numberOfRows, int pageIndex, int totalRecords) 
       { 

        JQGridResults result = new JQGridResults(); 
        List<JQGridRow> rows = new List<JQGridRow>(); 
        foreach (User user in users) 
        { 
         JQGridRow row = new JQGridRow(); 
         row.id = user.UserID; 
         row.cell = new string[6]; 
         row.cell[0] = user.UserID.ToString(); 
         row.cell[1] = user.UserName; 
         row.cell[2] = user.FirstName; 
         row.cell[3] = user.MiddleName; 
         row.cell[4] = user.LastName; 
         row.cell[5] = user.EmailID; 
         rows.Add(row); 
        } 
        result.rows = rows.ToArray(); 
        result.page = pageIndex; 
        result.total = totalRecords/numberOfRows; 
        result.records = totalRecords; 
        return new JavaScriptSerializer().Serialize(result); 
       } 

       private Collection<User> GetUsers(string numberOfRows, string pageIndex, string sortColumnName, string sortOrderBy, out int totalRecords) 
       { 
        Collection<User> users = new Collection<User>(); 
        string connectionString = ""; 

        using (SqlConnection connection = new SqlConnection(connectionString)) 
        { 
         using (SqlCommand command = new SqlCommand()) 
         { 
          command.Connection = connection; 
          command.CommandText = "select * from tblusers" ; 
          command.CommandType = CommandType.Text; // StoredProcedure; 

          SqlParameter paramPageIndex = new SqlParameter("@PageIndex", SqlDbType.Int); 
          paramPageIndex.Value = Convert.ToInt32(pageIndex); 
          command.Parameters.Add(paramPageIndex); 

          SqlParameter paramColumnName = new SqlParameter("@SortColumnName", SqlDbType.VarChar, 50); 
          paramColumnName.Value = sortColumnName; 
          command.Parameters.Add(paramColumnName); 

          SqlParameter paramSortorderBy = new SqlParameter("@SortOrderBy", SqlDbType.VarChar, 4); 
          paramSortorderBy.Value = sortOrderBy; 
          command.Parameters.Add(paramSortorderBy); 

          SqlParameter paramNumberOfRows = new SqlParameter("@NumberOfRows", SqlDbType.Int); 
          paramNumberOfRows.Value = Convert.ToInt32(numberOfRows); 
          command.Parameters.Add(paramNumberOfRows); 

          SqlParameter paramTotalRecords = new SqlParameter("@TotalRecords", SqlDbType.Int); 
          totalRecords = 0; 
          paramTotalRecords.Value = totalRecords; 
          paramTotalRecords.Direction = ParameterDirection.Output; 
          command.Parameters.Add(paramTotalRecords); 


          connection.Open(); 

          using (SqlDataReader dataReader = command.ExecuteReader()) 
          { 
           User user; 
           while (dataReader.Read()) 
           { 
            user = new User(); 
            user.UserID = (int)dataReader["UserID"]; 
            user.UserName = Convert.ToString(dataReader["UserName"]); 
            user.FirstName = Convert.ToString(dataReader["FirstName"]); 
            user.MiddleName = Convert.ToString(dataReader["MiddleName"]); 
            user.LastName = Convert.ToString(dataReader["LastName"]); 
            user.EmailID = Convert.ToString(dataReader["EmailID"]); 
            users.Add(user); 
           } 
          } 
          totalRecords = (int)paramTotalRecords.Value; 
         } 

         return users; 
        } 

       } 
       public bool IsReusable 
       { 
        // To enable pooling, return true here. 
        // This keeps the handler in memory. 
        get { return false; } 
       } 
      } 
     } 
    }

客户端

<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="sample.aspx.cs" Inherits="sample.WebForm1" %> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title></title> 
<!-- The jQuery UI theme that will be used by the grid --> 
    <link rel="stylesheet" type="text/css" media="screen" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.8.11/themes/redmond/jquery-ui.css" /> 
    <!-- The jQuery UI theme extension jqGrid needs --> 
    <link rel="stylesheet" type="text/css" media="screen" href="themes/ui.jqgrid.css" /> 
    <!-- jQuery runtime minified --> 
    <script src="http://ajax.microsoft.com/ajax/jquery/jquery-1.5.2.min.js" type="text/javascript"></script> 
    <!-- The localization file we need, English in this case --> 
    <script src="js/trirand/i18n/grid.locale-en.js"type="text/javascript"></script> 
    <!-- The jqGrid client-side javascript --> 
    <script src="js/trirand/jquery.jqGrid.min.js" type="text/javascript"></script> 

    <script type="text/javascript"> 
     $(function() { 
      $("#UsersGrid").jqGrid({ 
       url: 'jqGridHandler.ashx', 
       datatype: 'json', 
       height: 250, 
       colNames: ['UserID', 'UserName', 'FirstName', 'MiddleName', 'LastName', 'EmailID'], 
       colModel: [ 
         { name: 'UserID', index: 'UserID', width: 100, sortable: true }, 
         { name: 'UserName', width: 100, sortable: true }, 
         { name: 'FirstName', width: 100, sortable: true }, 
         { name: 'MiddleName', width: 100, sortable: true }, 
         { name: 'LastName', width: 100, sortable: true }, 
         { name: 'EmailID', width: 150, sortable: true } 
        ], 
       rowNum: 10, 
       rowList: [10, 20, 30], 
       pager: '#UsersGridPager', 
       sortname: 'UserID', 
       viewrecords: true, 
       sortorder: 'asc', 
       caption: 'JSON Example' 
      }); 

      $("#UsersGrid").jqGrid('navGrid', '#UsersGridPager', { edit: false, add: false, del: false }); 
     }); 

    </script> 
</head> 
<body> 
    <%--<form id="HtmlForm" runat="server">--%> 
    <table id="UsersGrid" cellpadding="0" cellspacing="0"></table> 
     <div id="UsersGridPager"></div> 

    <%-- </form>--%> 
</body> 
</html>

有什么不对呢？数据不显示。谢谢

更新

$(document).ready(function() { 
     $.ajax({ 
      type: 'POST', 
      contentType: "application/json; charset=utf-8", 
      url: "jqGridHandler.ashx", 
      datatype: 'json', 
      success: function (result) { 
       var JQResult = JSON.parse(result); 

       colD = JQResult.colData; 
       colN = JQResult.colNames; 
       var colM = JQResult.colModel; 

       alert(result.colModel); 
       jQuery("#UsersGrid").jqGrid(
            { 
             jsonReader: { repeatitems: false, cell: "", id: "0" }, 
             url: "jqGridHandler.ashx", 
             datatype: 'json', 
             mtype: 'POST', 

             data: colD, 
             ColNames: colN, 
             ColModel: ColM, 
             height: "auto", 
             gridview: true, 
             Pager: '#UsersGrid', 
             rowNum: 5, 
             rowList: [5, 10, 20, 50], 
             viewrecords: true, 
             loadComplete: function (data) { 
              alert('loaded completely'); 
             }, 
             loadError: function() { 
              alert('error'); 
             } 
            }); 
      }, 
      error: function (x, e) { 
       alert(x.readyState + ' ' + x.status + e.msg); 
      } 
     }); 

    });

动态一个

using System; 
using System.Collections.Generic; 
using System.Collections.ObjectModel; 
using System.Data; 
using System.Data.SqlClient; 
using System.Web; 
using System.Web.Script.Serialization; 

namespace jqGridInWebForm { 
    /// <summary> 
    /// Summary description for jqGridHandler 
    /// </summary> 
    public struct JQGridResults { 
     public int page; 
     public int total; 
     public int records; 
     public JQGridRow[] rows; 
    } 
    public struct JQGridRow { 
     public int id; 
     public string[] cell; 
    } 
    public enum GridType 
    { 
     GRID_TYPE_TEXT, 
     GRID_TYPE_DATE, 
     GRID_TYPE_INT, 
     GRID_TYPE_DOUBLE 
    } 

    [Serializable] 
    public class User { 
     public int UserID { get; set; } 
     public string UserName { get; set; } 
     public string FirstName { get; set; } 
     public string MiddleName { get; set; } 
     public string LastName { get; set; } 
     public string EmailID { get; set; } 
     public string Phone { get; set; } 

    } 

    public class clsGridData 
    { 
     public List<string> _Columns = new List<string>(); 
     public List<string[]> _Cells = new List<string[]>(); 

     public void InitFields(string P_SQL, string P_TYPE) 
     { 
      int _count; 
      string connectionString = "";//P_SQL 
      using (SqlConnection connection = new SqlConnection(connectionString)) 
      { 
       using (SqlCommand command = new SqlCommand()) 
       { 
        command.Connection = connection; 
        command.CommandText = "select * from tblusers"; 
        command.CommandType = CommandType.Text; // StoredProcedure; 
        connection.Open(); 

        using (SqlDataReader dataReader = command.ExecuteReader()) 
        { 
         string MyField; 
         for (_count = 0; _count < dataReader.FieldCount; _count++) 
         { 
          MyField = dataReader.GetName(_count); 
          _Columns.Add(MyField); 
         } 

         while (dataReader.Read()) 
         { 
          string[] MyCell = new string[dataReader.FieldCount]; 
          for (_count = 0; _count < dataReader.FieldCount; _count++) 
          { 
           MyCell[_count] = Convert.ToString(dataReader[_count]);         
          } 
          _Cells.Add(MyCell); 
         } 
        } 

       } 


      } 

     } 
    } 



    /// <summary> 
     /// Summary description for jqgridhandler 
     /// </summary> 
     public class jqGridHandler: IHttpHandler 
     { 



      public void ProcessRequest(HttpContext context) { 
       HttpRequest request = context.Request; 
       HttpResponse response = context.Response; 


       string _search = request["_search"]; 
       string numberOfRows = request["rows"]; 
       string pageIndex = request["page"]; 
       string sortColumnName = request["sidx"]; 
       string sortOrderBy = request["sord"]; 

       //int totalRecords; 
       //List<User> users = GetUsers(numberOfRows, pageIndex, sortColumnName, sortOrderBy, out totalRecords); 
       clsGridData i_grid_data = new clsGridData(); 
       i_grid_data.InitFields("",""); 
       string output = BuildJQGridResults(i_grid_data, Convert.ToInt32(numberOfRows), Convert.ToInt32(pageIndex)); 
       //string output = BuildJQGridResults(users, Convert.ToInt32(numberOfRows), Convert.ToInt32(pageIndex), Convert.ToInt32(totalRecords)); 
       response.Write (output); 
      } 

      private string BuildJQGridResults(clsGridData P_GRID_DATA, int numberOfRows, int pageIndex) 
      { 

       JQGridResults result = new JQGridResults(); 
       List<JQGridRow> rows = new List<JQGridRow>(); 
       int _count; 

       foreach (String[] Cells in P_GRID_DATA._Cells) 
       { 
        JQGridRow row = new JQGridRow(); 
        row.cell = new string[Cells.GetUpperBound(0)]; 
        //row.id = user.UserID; 
        for (_count = 0;_count< Cells.GetUpperBound(0); _count++) 
        {       
         row.cell[_count] = Cells[_count].ToString(); 
        } 
        rows.Add(row); 
       } 

       result.rows = rows.ToArray(); 
       result.page = pageIndex; 
       result.total = (P_GRID_DATA._Cells.Count + numberOfRows - 1)/numberOfRows; 
       result.records = P_GRID_DATA._Cells.Count; 
       return new JavaScriptSerializer().Serialize(result); 
      } 
      //private string BuildJQGridResults(List<User> users, int numberOfRows, int pageIndex, int totalRecords) { 

      // JQGridResults result = new JQGridResults(); 
      // List<JQGridRow> rows = new List<JQGridRow>(); 
      // foreach (User user in users) 
      // { 
      //  JQGridRow row = new JQGridRow(); 
      //  row.id = user.UserID; 
      //  row.cell = new string[6]; 

      //  row.cell[0] = user.UserID.ToString(); 
      //  row.cell[1] = user.UserName; 
      //  row.cell[2] = user.FirstName; 
      //  row.cell[3] = user.MiddleName; 
      //  row.cell[4] = user.LastName; 
      //  row.cell[5] = user.EmailID; 
      //  row.cell[6] = user.Phone ; 



      //  rows.Add (row); 
      // } 
      // result.rows = rows.ToArray(); 
      // result.page = pageIndex; 
      // result.total = (totalRecords + numberOfRows - 1)/numberOfRows; 
      // result.records = totalRecords; 
      // return new JavaScriptSerializer().Serialize (result); 
      //} 




      private List<User> GetDummyUsers(string numberOfRows, string pageIndex, string sortColumnName, string sortOrderBy, out int totalRecords) 
      { 
       var data = new List<User> 
       { 
        new User(){EmailID = "[email protected]", FirstName = "John", LastName = "Araya", UserID = 1, UserName = "Efrem"} 
       }; 
       totalRecords = data.Count; 
       return data; 
      } 


     private List<User> GetUsers(string numberOfRows, string pageIndex, string sortColumnName, string sortOrderBy, out int totalRecords) 
     { 
       List<User> users = new List<User>(); 

       string connectionString = ""; 

       using (SqlConnection connection = new SqlConnection (connectionString)) 
       { 
        using (SqlCommand command = new SqlCommand()) 
        { 
         command.Connection = connection; 
         command.CommandText = "select * from tblusers"; 
         command.CommandType = CommandType.Text; // StoredProcedure; 

         //SqlParameter paramPageIndex = new SqlParameter ("@PageIndex", SqlDbType.Int); 
         //paramPageIndex.Value = Convert.ToInt32 (pageIndex); 
         //command.Parameters.Add (paramPageIndex); 

         //SqlParameter paramColumnName = new SqlParameter ("@SortColumnName", SqlDbType.VarChar, 50); 
         //paramColumnName.Value = sortColumnName; 
         //command.Parameters.Add (paramColumnName); 

         //SqlParameter paramSortorderBy = new SqlParameter ("@SortOrderBy", SqlDbType.VarChar, 4); 
         //paramSortorderBy.Value = sortOrderBy; 
         //command.Parameters.Add (paramSortorderBy); 

         //SqlParameter paramNumberOfRows = new SqlParameter ("@NumberOfRows", SqlDbType.Int); 
         //paramNumberOfRows.Value = Convert.ToInt32 (numberOfRows); 
         //command.Parameters.Add (paramNumberOfRows); 

         //SqlParameter paramTotalRecords = new SqlParameter ("@TotalRecords", SqlDbType.Int); 
         //totalRecords = 0; 
         //paramTotalRecords.Value = totalRecords; 
         //paramTotalRecords.Direction = ParameterDirection.Output; 
         //command.Parameters.Add (paramTotalRecords); 


         connection.Open(); 

         using (SqlDataReader dataReader = command.ExecuteReader()) 
         { 
          User user; 
          while (dataReader.Read()) 
          { 
           user = new User(); 
           user.UserID = (int)dataReader["UserID"]; 
           user.UserName = Convert.ToString (dataReader["UserName"]); 
           user.FirstName = Convert.ToString (dataReader["FirstName"]); 
           user.MiddleName = Convert.ToString (dataReader["MiddleName"]); 
           user.LastName = Convert.ToString (dataReader["LastName"]); 
           user.EmailID = Convert.ToString (dataReader["EmailID"]); 
           users.Add (user); 
          } 
         } 
         //totalRecords = (int)paramTotalRecords.Value; 
        } 
        totalRecords = 0; 
        return users; 
       } 

      } 
      public bool IsReusable { 
       // To enable pooling, return true here. 
       // This keeps the handler in memory. 
       get { return false; } 
      } 
    } 


}

来源

2011-10-04 Efrem

你的主要错误是你定义的类jqGridHandler（public class jqGridHandler : IHttpHandler）内的的User类更新vesion。您应该在顶层定义它。

例如，我不评论GetUsers包括string connectionString = ""的代码。你应该知道你如何访问你的数据库。

另一个小错误是行

result.total = totalRecords/numberOfRows;

应固定

result.total = (totalRecords + numberOfRows - 1)/numberOfRows;

它不是那么重要，但我更愿意用List<User>而不是Collection<User>。

更改后代码将起作用（您可以从here下载我使用的演示项目）。我建议你另外执行loadError事件句柄。以the answer为例。

来源

2011-10-05 19:35:47 Oleg

太谢谢你了。当我尝试修改版本时，它没有显示数据。我试着将文件的内容复制到我的原始文件中，然后得到相同的结果。没有数据。我从下载试用了该软件包。它运作良好。但有一个区别，我的应用程序中没有CSS，并且j <％@ Page Language =“C＃”AutoEventWireup =“true”CodeBehind =“Sample.aspx.cs”Inherits =“jqGridInWebForm.Sample”％>。我的案例<％@ Page Language =“C＃”AutoEventWireup =“true”CodeBehind =“sample.aspx.cs”Inherits =“sample.WebForm1”％>。这是否有所作为？ – Efrem

@Efrem：你是否试图在代码中包含'GetDummyUsers'而不是'GetUsers'？你是否试图包含任何'loadError'？尝试使用至少'loadError：function（jqXHR，textStatus，errorThrown）{alert（jqXHR.responseText）;警报（textStatus）;警报（errorThrown）; }'。关于你的问题'codeBase'：我无法回答，因为我不知道项目中的所有文件。我建议你一步一步修改你的工作演示。然后在一步中，你会发现你所做的错误。 – Oleg

非常感谢您的及时回复。如您所说，我将您的演示版本修改为我的项目。现在，当我尝试连接到数据库时，它给了我一个错误totalRecords =（int）paramTotalRecords.Value;它给了我一个错误特定的转换无效。我改为totalRecords = Convert.ToInt32（paramTotalRecords.Value）;行，那么错误是Object不能从DBNull转换为其他类型。是什么原因？？谢谢先生 – Efrem

我修改了源代码，现在记录显示得非常顺利，但唯一的问题是搜索无法正常工作，请您看看吗？我的代码如下：

aspx页面：

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="JQGrid.aspx.cs" Inherits="JQGrid" %> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head id="Head1" runat="server"> 
    <title></title> 
    <%--<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.8/themes/ui-darkness/jquery-ui.css" type="text/css" media="all" />--%> 

    <link rel="stylesheet" type="text/css" media="screen" href="http://ajax.aspnetcdn.com/ajax/jquery.ui/1.9.2/themes/redmond/jquery-ui.css" /> 
    <link href="jqScripts/css/ui.jqgrid.css" rel="stylesheet" type="text/css" /> 
    <script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.4/jquery.min.js" type="text/javascript"></script> 
    <script src="jqScripts/js/i18n/grid.locale-en.js" type="text/javascript"></script> 
    <script src="jqScripts/js/jquery.jqGrid.min.js" type="text/javascript"></script> 

    <script type="text/javascript"> 
     $(function() { 
      $("#UsersGrid").jqGrid({ 
       url: 'jqGridHandler.ashx', 
       datatype: 'json', 
       height: 250, 
       colNames: ['CustomerID', 'CompanyName', 'ContactName', 'ContactTitle', 'Address', 'City', 'PostalCode', 'Country'], 
       colModel: [ 
         { name: 'CustomerID', index: 'CustomerID', width: 75, sortable: true }, 
         { name: 'CompanyName', width: 100, sortable: true }, 
         { name: 'ContactName', width: 100, sortable: true }, 
         { name: 'ContactTitle', width: 100, sortable: true }, 
         { name: 'Address', width: 100, sortable: true }, 
         { name: 'City', width: 100, sortable: true }, 
         { name: 'PostalCode', width: 100, sortable: true }, 
         { name: 'Country', width: 150, sortable: true } 
        ], 
       rowNum: 10, 
       rowList: [10, 20, 30], 
       pager: '#UsersGridPager', 
       sortname: 'CustomerID', 
       viewrecords: true, 
       sortorder: 'asc', 
       caption: 'My Data' 
      }); 

      $("#UsersGrid").jqGrid('navGrid', '#UsersGridPager', { edit: false, add: false, del: false }); 
     }); 

    </script> 

</head> 
<body> 
    <form id="HtmlForm" runat="server"> 
    <table id="UsersGrid" cellpadding="0" cellspacing="0"> 
     <div id="UsersGridPager"> 
     </div> 
    </table> 
    </form> 
</body> 
</html>

和ASHX：

<%@ WebHandler Language="C#" Class="jqGridHandler" %> 

using System; 
using System.Collections.Generic; 

using System.Collections.ObjectModel; 

using System.Data; 

using System.Data.SqlClient; 

using System.Web; 

using System.Web.Script.Serialization; 

public class jqGridHandler : IHttpHandler 
{ 

    public void ProcessRequest(HttpContext context) 
    { 
     HttpRequest request = context.Request; 
     HttpResponse response = context.Response; 

     string _search = request["_search"]; 
     string numberOfRows = request["rows"]; 
     //string numberOfRows = "10"; 
     string pageIndex= request["page"]; 
     string sortColumnName= request["sidx"]; 
     string sortOrderBy = request["sord"]; 


     int totalRecords; 
     //public DataTable GetDataTable(string sidx, string sord, int page, int pageSize) 
     Collection<User> users = GetUsers(numberOfRows, pageIndex, sortColumnName, sortOrderBy, out totalRecords, _search); 
     string output = BuildJQGridResults(users, Convert.ToInt32(numberOfRows), Convert.ToInt32(pageIndex), Convert.ToInt32(totalRecords)); 
     response.Write(output); 
    } 

    private string BuildJQGridResults(Collection<User> users,int numberOfRows, int pageIndex,int totalRecords) 
    { 

     JQGridResults result = new JQGridResults(); 
     List<JQGridRow> rows = new List<JQGridRow>(); 
     foreach (User user in users) 
     { 
      JQGridRow row = new JQGridRow(); 
      row.id = user.CustomerID; 
      row.cell = new string[8]; 
      row.cell[0] = user.CustomerID; 
      row.cell[1] = user.CompanyName; 
      row.cell[2] = user.ContactName; 
      row.cell[3] = user.ContactTitle; 
      row.cell[4] = user.Address; 
      row.cell[5] = user.City; 
      row.cell[6] = user.PostalCode; 
      row.cell[7] = user.Country; 

      rows.Add(row); 
     } 
     result.rows = rows.ToArray(); 
     result.page = pageIndex; 
     result.total = totalRecords/numberOfRows; 
     result.records = totalRecords; 
     return new JavaScriptSerializer().Serialize(result); 
    } 

    private Collection<User> GetUsers(string numberOfRows, string pageIndex, string sortColumnName, string sortOrderBy, out int totalRecords, string _search) 
    { 
     Collection<User> users = new Collection<User>(); 
     string connectionString = "Data Source=ritetechno\\sqlexpress;Initial Catalog=Northwind;Integrated Security=True"; 
     //<add name="constr" connectionString="Data Source=Abdul-THINK;Initial Catalog=Northwind;Integrated Security=True" providerName="System.Data.SqlClient"/> 

     using (SqlConnection connection = new SqlConnection(connectionString)) 
     { 
      using (SqlCommand command = new SqlCommand()) 
      { 
       int numRows=Convert.ToInt32(numberOfRows)*(Convert.ToInt32(pageIndex)); 
       int excluderows=Convert.ToInt32(numberOfRows)*((Convert.ToInt32(pageIndex)-1)); 
       command.Connection = connection; 
       command.CommandText = "SELECT TOP " + numRows + " CustomerID, CompanyName, ContactName, ContactTitle, Address, City, PostalCode, Country FROM Customers WHERE CustomerID NOT IN (SELECT TOP " + excluderows +" CustomerID FROM Customers)"; 
       command.CommandType = CommandType.Text; 
       connection.Open(); 

       using (SqlDataReader dataReader = command.ExecuteReader()) 
       { 
        User user; 
        while (dataReader.Read()) 
        { 
         user = new User(); 
         user.CustomerID = Convert.ToString(dataReader["CustomerID"]); 
         user.CompanyName = Convert.ToString(dataReader["CompanyName"]); 
         user.ContactName = Convert.ToString(dataReader["ContactName"]); 
         user.ContactTitle = Convert.ToString(dataReader["ContactTitle"]); 
         user.Address = Convert.ToString(dataReader["Address"]); 
         user.City = Convert.ToString(dataReader["City"]); 
         user.PostalCode = Convert.ToString(dataReader["PostalCode"]); 
         user.Country = Convert.ToString(dataReader["Country"]); 
         users.Add(user);       
        } 
       } 
       string cmdTotRec = "SELECT COUNT(*) FROM Customers"; 
       SqlCommand chkTotRec = new SqlCommand(cmdTotRec, connection); 
       totalRecords = Convert.ToInt32(chkTotRec.ExecuteScalar().ToString()); 
       connection.Close(); 
      } 

      return users; 
     } 

    } 
    public bool IsReusable 
    { 
     // To enable pooling, return true here. 
     // This keeps the handler in memory. 
     get { return false; } 
    } 

    public struct JQGridResults 
    { 
     public int page; 
     public int total; 
     public int records; 
     public JQGridRow[] rows; 

    } 
    public struct JQGridRow 
    { 
     public string id; 
     public string[] cell; 
    } 

    [Serializable] 
    public class User 
    { 
     public string CustomerID { get; set; } 
     public string CompanyName { get; set; } 
     public string ContactName { get; set; } 
     public string ContactTitle { get; set; } 
     public string Address { get; set; } 
     public string City { get; set; } 
     public string PostalCode { get; set; } 
     public string Country { get; set; } 
    } 
}

来源

2013-02-05 19:45:03

JQGrid不显示数据

回答

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