Ok, maybe I am also wrong.
I have to set the AutoLoad="False" per your suggestion for the large amount of data.
Althought I set the datasource and bind the data in a method similar to what I put in Page_Load(), but there is no data in the grid when page loads.
Here is the example:
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Globalization" %>
<%@ Import Namespace="System.Collections.Generic" %>
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>
<!DOCTYPE html>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
var store = this.GridPanel1.GetStore();
store.DataSource = getData();
store.DataBind();
}
protected void Store_RefreshData(object sender, StoreReadDataEventArgs e)
{
List<Project> data = getData();
if (e.Sort.Length > 1)
{
data.Sort(delegate(Project x, Project y)
{
object a;
object b;
int direction = e.Sort[1].Direction == Ext.Net.SortDirection.DESC ? -1 : 1;
a = x.GetType().GetProperty(e.Sort[1].Property).GetValue(x, null);
b = y.GetType().GetProperty(e.Sort[1].Property).GetValue(y, null);
return CaseInsensitiveComparer.Default.Compare(a, b)*direction;
});
}
e.Total = data.Count;
Store1.DataSource = data;
}
private List<Project> getData()
{
CultureInfo ci = new CultureInfo("en-US");
return new List<Project>
{
new Project(100, "Ext Forms: Field Anchoring", 112, "Integrate 2.0 Forms with 2.0 Layouts", 6, 150, 0, DateTime.Parse("06/24/2007",ci)),
new Project(100, "Ext Forms: Field Anchoring", 113, "Implement AnchorLayout", 4, 150, 0, DateTime.Parse("06/25/2007",ci)),
new Project(100, "Ext Forms: Field Anchoring", 114, "Add support for multiple types of anchors", 4, 150, 0, DateTime.Parse("06/27/2007",ci)),
new Project(100, "Ext Forms: Field Anchoring", 115, "Testing and debugging", 8, 0, 0, DateTime.Parse("06/29/2007",ci)),
new Project(101, "Ext Grid: Single-level Grouping", 101, "Add required rendering \"hooks\" to GridView", 6, 100, 0, DateTime.Parse("07/01/2007",ci)),
new Project(101, "Ext Grid: Single-level Grouping", 102, "Extend GridView and override rendering functions", 6, 100, 0, DateTime.Parse("07/03/2007",ci)),
new Project(101, "Ext Grid: Single-level Grouping", 103, "Extend Store with grouping functionality", 4, 100, 0, DateTime.Parse("07/04/2007",ci)),
new Project(101, "Ext Grid: Single-level Grouping", 121, "Default CSS Styling", 2, 100, 0, DateTime.Parse("07/05/2007",ci)),
new Project(101, "Ext Grid: Single-level Grouping", 104, "Testing and debugging", 6, 100, 0, DateTime.Parse("07/06/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 105, "Ext Grid plugin integration", 4, 125, 0, DateTime.Parse("07/01/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 106, "Summary creation during rendering phase", 4, 125, 0, DateTime.Parse("07/02/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 107, "Dynamic summary updates in editor grids", 6, 125, 0, DateTime.Parse("07/05/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 108, "Remote summary integration", 4, 125, 0, DateTime.Parse("07/05/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 109, "Summary renderers and calculators", 4, 125, 0, DateTime.Parse("07/06/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 110, "Integrate summaries with GroupingView", 10, 125, 0, DateTime.Parse("07/11/2007",ci)),
new Project(102, "Ext Grid: Summary Rows", 111, "Testing and debugging", 8, 125, 0, DateTime.Parse("07/15/2007",ci))
};
}
public class Project
{
public Project(int projectId, string name, int taskId, string description, int estimate, double rate, double cost, DateTime due)
{
this.ProjectID = projectId;
this.Name = name;
this.TaskID = taskId;
this.Description = description;
this.Estimate = estimate;
this.Rate = rate;
this.Due = due;
}
public int ProjectID { get; set; }
public string Name { get;set; }
public int TaskID { get; set; }
public string Description { get;set; }
public int Estimate { get;set; }
public double Rate { get; set; }
public double Cost { get; set; }
public DateTime Due { get; set; }
}
</script>
<html>
<head id="Head1" runat="server">
<title>GroupingSummary Plugin - Ext.NET Examples</title>
<link href="/resources/css/examples.css" rel="stylesheet" type="text/css" />
<style type="text/css">
.x-grid-body .x-grid-cell-Cost {
background-color : #f1f2f4;
}
.x-grid-row-summary .x-grid-cell-Cost .x-grid-cell-inner{
background-color : #e1e2e4;
}
.task .x-grid-cell-inner {
padding-left: 15px;
}
.x-grid-row-summary .x-grid-cell-inner {
font-weight: bold;
font-size: 11px;
background-color : #f1f2f4;
}
</style>
<script type="text/javascript">
var totalCost = function (records) {
var i = 0,
length = records.length,
total = 0,
record;
for (; i < length; ++i) {
record = records[i];
total += record.get('Estimate') * record.get('Rate');
}
return total;
};
</script>
</head>
<body>
<form id="Form1" runat="server">
<h1>Group Summary Plugin</h1>
<p>Advanced grouping grid that allows cell editing and includes custom dynamic summary calculations.</p>
<ext:ResourceManager ID="ResourceManager1" runat="server"/>
<ext:Store ID="Store1" runat="server" GroupField="Name" RemoteSort="True" AutoLoad="False" OnReadData="Store_RefreshData">
<%--<Sorters>
<ext:DataSorter Property="Due" Direction="ASC" />
</Sorters>--%>
<Model>
<ext:Model ID="Model1" runat="server" IDProperty="TaskID">
<Fields>
<ext:ModelField Name="ProjectID" />
<ext:ModelField Name="Name" />
<ext:ModelField Name="TaskID" />
<ext:ModelField Name="Description" />
<ext:ModelField Name="Estimate" Type="Int" />
<ext:ModelField Name="Rate" Type="Float" />
<ext:ModelField Name="Cost" Type="Float" />
<ext:ModelField Name="Due" Type="Date" />
</Fields>
</ext:Model>
</Model>
<Proxy>
<ext:PageProxy/>
</Proxy>
</ext:Store>
<ext:GridPanel
ID="GridPanel1"
runat="server"
Frame="true"
StoreID="Store1"
Title="Sponsored Projects"
Collapsible="true"
AnimCollapse="false"
Icon="ApplicationViewColumns"
Width="800"
Height="450">
<Plugins>
<ext:CellEditing ID="CellEditing1" runat="server" ClicksToEdit="1" />
</Plugins>
<ColumnModel ID="ColumnModel1" runat="server">
<Columns>
<ext:SummaryColumn ID="SummaryColumn1"
runat="server"
TdCls="task"
Text="Task"
Sortable="true"
DataIndex="Description"
Hideable="false"
SummaryType="Count"
Flex="1">
<SummaryRenderer Handler="return ((value === 0 || value > 1) ? '(' + value +' Tasks)' : '(1 Task)');" />
</ext:SummaryColumn>
<ext:Column ID="Column1" runat="server" Text="Project" DataIndex="Name" Width="20" />
<ext:SummaryColumn ID="SummaryColumn2"
runat="server"
Width="85"
Text="Due Date"
Sortable="true"
DataIndex="Due"
SummaryType="Max">
<Renderer Format="Date" FormatArgs="'m/d/Y'" />
<SummaryRenderer Fn="Ext.util.Format.dateRenderer('m/d/Y')" />
<Editor>
<ext:DateField ID="DateField1" runat="server" Format="MM/dd/yyyy" />
</Editor>
</ext:SummaryColumn>
<ext:SummaryColumn ID="SummaryColumn3"
runat="server"
Width="75"
Text="Estimate"
Sortable="true"
DataIndex="Estimate"
SummaryType="Sum">
<Renderer Handler="return value +' hours';" />
<SummaryRenderer Handler="return value +' hours';" />
<Editor>
<ext:NumberField ID="NumberField1" runat="server" AllowBlank="false" AllowNegative="false" StyleSpec="text-align:left" />
</Editor>
</ext:SummaryColumn>
<ext:SummaryColumn ID="SummaryColumn4"
runat="server"
Width="75"
Text="Rate"
Sortable="true"
DataIndex="Rate"
SummaryType="Average">
<Renderer Format="UsMoney" />
<SummaryRenderer Fn="Ext.util.Format.usMoney" />
<Editor>
<ext:NumberField ID="NumberField2" runat="server" AllowBlank="false" AllowNegative="false" StyleSpec="text-align:left" />
</Editor>
</ext:SummaryColumn>
<ext:SummaryColumn
runat="server"
Width="75"
ID="Cost"
Text="Cost"
Sortable="false"
Groupable="false"
DataIndex="Cost"
CustomSummaryType="totalCost">
<Renderer Handler="return Ext.util.Format.usMoney(record.data.Estimate * record.data.Rate);" />
<SummaryRenderer Fn="Ext.util.Format.usMoney" />
</ext:SummaryColumn>
</Columns>
</ColumnModel>
<View>
<ext:GridView ID="GridView1" runat="server" StripeRows="true" MarkDirty="false" />
</View>
<Features>
<ext:GroupingSummary ID="GroupingSummary1" runat="server" GroupHeaderTpl="{name}" HideGroupedHeader="true" EnableGroupingMenu="false">
</ext:GroupingSummary>
</Features>
<TopBar>
<ext:Toolbar ID="Toolbar1" runat="server">
<Items>
<ext:Button ID="Button1" runat="server" Text="Toggle" ToolTip="Toggle the visibility of summary row">
<Listeners>
<Click Handler="#{GroupingSummary1}.toggleSummaryRow(!#{GroupingSummary1}.showSummaryRow);#{GroupingSummary1}.view.refresh();" />
</Listeners>
</ext:Button>
</Items>
</ext:Toolbar>
</TopBar>
</ext:GridPanel>
</form>
</body>
</html>