<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="default.aspx.cs" Inherits="JQSuiteASPNETExample.examples.grid.treegrid.rowsondemand._default" %>
<%@ Register Assembly="Trirand.Web" TagPrefix="trirand" Namespace="Trirand.Web.UI.WebControls" %>
<!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>jqGrid ASP.NET example with SqlDataSource</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/1.8.16/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-1.7.1.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>
<!-- This jQuery UI library is needed only for the code tabs, not needed by the grid per se -->
<style type="text/css">
body, html { font-size: 80%; }
</style>
</head>
<body>
<form id="form1" runat="server">
<trirand:JQGrid runat="server" ID="RowsOnDemandGrid" Width="600px" Height="350px">
<Columns>
<trirand:JQGridColumn DataField="ID" PrimaryKey="True" Visible="false" />
<trirand:JQGridColumn DataField="Name" Width="420" />
<trirand:JQGridColumn DataField="Quantity" />
<trirand:JQGridColumn DataField="Price" />
<trirand:JQGridColumn DataField="Color" />
</Columns>
<TreeGridSettings Enabled="true" />
</trirand:JQGrid>
<br /><br />
<trirand:codetabs runat="server" id="tabs"></trirand:codetabs>
</form>
</body>
</html>
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using Trirand.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
namespace JQSuiteASPNETExample.examples.grid.treegrid.rowsondemand
{
public partial class _default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (RowsOnDemandGrid.AjaxCallBackMode == AjaxCallBackMode.RequestData)
{
DataTable data;
JQGridTreeExpandData expandData = RowsOnDemandGrid.GetTreeExpandData();
if (expandData.ParentID == null)
{
data = GetRootData();
}
else
{
data = GetChildData(expandData.ParentLevel, expandData.ParentID);
}
RowsOnDemandGrid.DataSource = data;
RowsOnDemandGrid.DataBind();
}
}
protected DataTable GetRootData()
{
// Create a new Sql Connection and set connection string accordingly
SqlConnection sqlConnection = new SqlConnection();
sqlConnection.ConnectionString = ConfigurationManager.ConnectionStrings["SQL2008_449777_fhsConnectionString"].ConnectionString;
sqlConnection.Open();
// ********************************************************************************************
// when selecting rows, you need to specify some or all of the following reserved fields
// tree_level - the level of the row in the tree hierarchy. 0 is for root row.
// tree_leaf - if the row is leaf (no child rows). This will make it non-expandable and will have an alternative icon
// tree_expanded - if the row is expanded by default or not
// tree_parent - the primary key (ID) of the parent row (only applicable for child rows)
// tree_loaded - true/false - if the tree nodes are already loaded. Can be used to show several levels expanded by default.
// ********************************************************************************************
string sqlStatement = @"SELECT
ID,
Name,
Price,
Color,
Quantity,
0 AS 'tree_level',
0 AS 'tree_expanded',
CASE WHEN
(SELECT COUNT(*) AS Expr1
FROM
RetailData
WHERE
(ParentID = A.ID)
) = 0 THEN 1 ELSE 0 END AS 'tree_leaf'
FROM
RetailData AS A
WHERE
A.ParentID IS null";
// Create a SqlDataAdapter to get the results as DataTable
SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sqlStatement, sqlConnection);
// Create a new DataTable
DataTable dtResult = new DataTable();
// Fill the DataTable with the result of the SQL statement
sqlDataAdapter.Fill(dtResult);
return dtResult;
}
protected DataTable GetChildData(int level, string parentID)
{
int childLevel = level + 1;
// Create a new Sql Connection and set connection string accordingly
SqlConnection sqlConnection = new SqlConnection();
sqlConnection.ConnectionString = ConfigurationManager.ConnectionStrings["SQL2008_449777_fhsConnectionString"].ConnectionString;
sqlConnection.Open();
// ********************************************************************************************
// when selecting rows, you need to specify some or all of the following reserved fields
// tree_level - the level of the row in the tree hierarchy. 0 is for root row.
// tree_leaf - if the row is leaf (no child rows). This will make it non-expandable and will have an alternative icon
// tree_expanded - if the row is expanded by default or not
// tree_parent - the primary key (ID) of the parent row (only applicable for child rows)
// tree_loaded - true/false - if the tree nodes are already loaded. Can be used to show several levels expanded by default.
// ********************************************************************************************
string sqlStatement = @"SELECT
ID,
Name,
Price,
Color,
Quantity,
ParentID,
{0} AS 'tree_level',
{1} AS 'tree_parent',
0 AS 'tree_expanded',
CASE WHEN
(SELECT COUNT(*) AS Expr1
FROM
RetailData
WHERE
(ParentID = A.ID)
) = 0 THEN 1 ELSE 0 END AS 'tree_leaf'
FROM
RetailData AS A
WHERE
A.ParentID = {1}";
sqlStatement = String.Format(sqlStatement, childLevel.ToString(), parentID);
// Create a SqlDataAdapter to get the results as DataTable
SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sqlStatement, sqlConnection);
// Create a new DataTable
DataTable dtResult = new DataTable();
// Fill the DataTable with the result of the SQL statement
sqlDataAdapter.Fill(dtResult);
return dtResult;
}
}
}
Switch theme:
Theming is based on the very popular jQuery
ThemeRoller standard. This is the same theming mechanism used by jQuery UI and is now a de-facto standard for jQuery based components.
The benefits of using ThemeRoller are huge. We can offer a big set of ready to use themes created by professional designers, including Windows-like themes (Redmond), Apple-like theme (Cupertino), etc.
In addition to that any jQuery UI controls on the same page will pick the same theme.
Last, but not least, you can always roll your own ThemeRoller theme, using the superb
Theme Editor
To use a theme, simply reference 2 Css files in your Html <head> section - the ThemeRoller theme you wish to use, and the jqGrid own ThemeRoller Css file. For example (Redmond theme):
<link rel="stylesheet" type="text/css" media="screen" href="/themes/redmond/jquery-ui-1.8.2.custom.css" />
<link rel="stylesheet" type="text/css" media="screen" href="/themes/ui.jqgrid.css" />