[CLOSED] Loading userControls dinamically inside tabs
Hi,
Due to the size of our forms, we have performance problems. Many tabs with fields in each.
Structurally we divided each tab in usercontrols to keep the code more organized.
We are trying to load tabs dynamically, but we have some difficulties and we would like you to help and tell us what is the best way to do this.
When performing a call directevent we received an error that the control was not found. We know that this is because the dynamically created controls must be recreated to each request. But how would we do this keeping the states of the controls?
We are using version 1.6 of Ext.NET and if necessary we can upgrade to version 2.1.
In this example we need to load the usercontrols of the tabs and send/filter data to the server side keeping the state/data on screen.
BaseUserControl
Code:
using System.Collections.Generic;
using System.Web.UI;
public class BaseUserControl : UserControl
{
public virtual List<string> ControlsToDestroy
{
get
{
// we should return none lazy controls only because lazy controls will be autodestroyed by parent container
return new List<string>();
}
}
public virtual void LoadData()
{
}
}
Default.aspx
Code:
<%@ Page Language="C#" AutoEventWireup="true" Inherits="System.Web.UI.Page" %>
<script runat="server">
public bool ControlGenerated
{
get
{
var viewstate = ViewState["ControlGenerated"];
return viewstate != null ? (bool)viewstate : false;
}
set { ViewState["ControlGenerated"] = value; }
}
protected void Page_Load(object sender, EventArgs e)
{
}
protected void FormTab_Activate(object sender, DirectEventArgs e)
{
var controlName = e.ExtraParams["controlName"].ToString();
var control = e.ExtraParams["control"].ToString();
var panel = (Ext.Net.Panel)sender;
CreateControl(control, controlName, panel);
}
private void CreateControl(string userControl, string controlName, Ext.Net.Panel panel)
{
X.Js.Call("destroyFromCache", new JRawValue(panel.ClientID));
var control = (BaseUserControl)this.LoadControl(userControl);
control.ID = controlName;
panel.ContentControls.Add(control);
control.LoadData();
X.Js.Call("putToCache", new JRawValue(panel.ClientID), control.ControlsToDestroy);
panel.UpdateContent();
}
</script>
<!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>Ext.NET Example</title>
<script type="text/javascript">
var destroyFromCache = function (container) {
container.controlsCache = container.controlsCache || [];
Ext.each(container.controlsCache, function (controlId) {
var control = Ext.getCmp(controlId);
if (control && control.destroy) {
control.destroy();
}
});
};
var putToCache = function (container, controls) {
container.controlsCache = controls;
};
</script>
</head>
<body>
<form id="Form1" runat="server">
<ext:ResourceManager runat="server" />
<a href="http://www.ext.net/">
<img src="http://speed.ext.net/identity/extnet-logo-small.png" /></a>
<ext:Container ID="MainContainer" runat="server">
</ext:Container>
<ext:TabPanel runat="server" Height="350">
<Items>
<ext:Panel ID="MainTabPanel" runat="server" Title="Main">
</ext:Panel>
<ext:Panel ID="FormTabPanel" runat="server" Title="Form">
<DirectEvents>
<Activate OnEvent="FormTab_Activate" Single="true">
<ExtraParams>
<ext:Parameter Name="control" Value="~/UserWebUserControl.ascx"></ext:Parameter>
<ext:Parameter Name="controlName" Value="userWebUserControl"></ext:Parameter>
</ExtraParams>
</Activate>
</DirectEvents>
</ext:Panel>
<ext:Panel ID="GridTabPanel" runat="server" Title="Grid">
<DirectEvents>
<Activate OnEvent="FormTab_Activate" Single="true">
<ExtraParams>
<ext:Parameter Name="control" Value="~/UserGridWebUserControl.ascx"></ext:Parameter>
<ext:Parameter Name="controlName" Value="userGridWebUserControl"></ext:Parameter>
</ExtraParams>
</Activate>
</DirectEvents>
</ext:Panel>
</Items>
</ext:TabPanel>
</form>
</body>
</html>
UserGridWebUserControl.ascx
Code:
<%@ Control Language="C#" AutoEventWireup="true" Inherits="BaseUserControl" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
}
public override List<string> ControlsToDestroy
{
get
{
// we should return none lazy controls only because lazy controls will be autodestroyed by parent container
return new List<string>
{
GridPanelControl.ClientID,
};
}
}
public override void LoadData()
{
LoadGridData(searchField.Text);
}
[DirectMethod]
public void LoadGridData(string data)
{
var list = new List<TestClass>();
for (int i = 1; i < 11; i++)
{
var test = new TestClass
{
Id = i,
Nome = string.Format("Nome {0}", i),
DataInicial = DateTime.Now,
DataFinal = DateTime.Now
};
list.Add(test);
}
if (!string.IsNullOrEmpty(data))
list = list.Where(i => i.Nome.Contains(data)).ToList();
GridPanelControlStore.DataSource = list;
GridPanelControlStore.DataBind();
}
protected void searchButton_DirectClick(object sender, DirectEventArgs e)
{
//LoadGridData(searchField.Text);
}
protected void GridPanelControlStore_RefreshData(object sender, StoreRefreshDataEventArgs e)
{
LoadGridData(searchField.Text);
}
protected void GridCommand_Event(object sender, DirectEventArgs e)
{
var nome = e.ExtraParams["nome"].ToString();
X.Msg.Notify("Nome", nome).Show();
}
public class TestClass
{
public int Id { get; set; }
public string Nome { get; set; }
public DateTime DataInicial { get; set; }
public DateTime DataFinal { get; set; }
}
</script>
<ext:GridPanel ID="GridPanelControl" runat="server" AutoExpandColumn="Nome" StripeRows="true" Border="false">
<TopBar>
<ext:Toolbar runat="server">
<Items>
<ext:TextField ID="searchField" runat="server"></ext:TextField>
<ext:Button ID="searchButton" runat="server" Text="OK">
<Listeners>
<Click Handler="#{GridPanelControl}.store.reload();" />
</Listeners>
</ext:Button>
</Items>
</ext:Toolbar>
</TopBar>
<Store>
<ext:Store ID="GridPanelControlStore" runat="server" OnRefreshData="GridPanelControlStore_RefreshData">
<Reader>
<ext:JsonReader IDProperty="Id">
<Fields>
<ext:RecordField Type="Int" Name="Id"></ext:RecordField>
<ext:RecordField Type="String" Name="Nome"></ext:RecordField>
<ext:RecordField Type="Date" Name="DataInicial"></ext:RecordField>
<ext:RecordField Type="Date" Name="DataFinal"></ext:RecordField>
</Fields>
</ext:JsonReader>
</Reader>
</ext:Store>
</Store>
<ColumnModel>
<Columns>
<ext:CommandColumn Width="60">
<Commands>
<ext:GridCommand Icon="Delete" CommandName="Delete">
<ToolTip Text="Delete" />
</ext:GridCommand>
<ext:CommandSeparator />
<ext:GridCommand Icon="NoteEdit" CommandName="Edit">
<ToolTip Text="Edit" />
</ext:GridCommand>
</Commands>
</ext:CommandColumn>
<ext:Column DataIndex="Id" ColumnID="Id" Header="Id"></ext:Column>
<ext:Column DataIndex="Nome" ColumnID="Nome" Header="Nome"></ext:Column>
<ext:DateColumn DataIndex="DataInicial" ColumnID="DataInicial" Header="Data Inicial" Format="dd/MM/yyyy"></ext:DateColumn>
<ext:DateColumn DataIndex="DataFinal" ColumnID="DataFinal" Header="Data Final" Format="dd/MM/yyyy"></ext:DateColumn>
</Columns>
</ColumnModel>
<SelectionModel>
<ext:RowSelectionModel runat="server" SingleSelect="true"></ext:RowSelectionModel>
</SelectionModel>
<BottomBar>
<ext:PagingToolbar runat="server"></ext:PagingToolbar>
</BottomBar>
<DirectEvents>
<Command OnEvent="GridCommand_Event">
<ExtraParams>
<ext:Parameter Name="nome" Value="record.data.Nome"></ext:Parameter>
</ExtraParams>
</Command>
</DirectEvents>
</ext:GridPanel>
UserWebUserControl.ascx
Code:
<%@ Control Language="C#" AutoEventWireup="true" Inherits="BaseUserControl" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Salvar_Click(object sender, DirectEventArgs e)
{
X.Msg.Notify("Message", this.Nome.Text).Show();
}
public override List<string> ControlsToDestroy
{
get
{
// we should return none lazy controls only because lazy controls will be autodestroyed by parent container
return new List<string>
{
PanelControl.ClientID,
};
}
}
</script>
<ext:Panel
ID="PanelControl"
runat="server"
Padding="5"
Layout="FormLayout"
Border="false"
Width="600"
DefaultAnchor="100%">
<Items>
<ext:TextField ID="Nome" runat="server" FieldLabel="Nome" />
<ext:DateField ID="DataInicial" runat="server" FieldLabel="Data Inicial"/>
<ext:DateField ID="DataFinal" runat="server" FieldLabel="Data Final"/>
</Items>
<Buttons>
<ext:Button ID="Salvar" runat="server" Text="Salvar" OnDirectClick="Salvar_Click">
</ext:Button>
</Buttons>
</ext:Panel>
Thank you.
