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I'll try and explain this as exact as possible.
I am browsing posting on one form. I select a link from ppostings.aspx(browse) and click on a hyperlink which goes to a NEW form ppost.aspx?id=7(the posting i clicked)
I have worked with Coolite for a few months now, the model viewer/editor (on the same screen) works great... but in this situation I DO NOT have both on the same screen, they are working on SEPARATE screens, it has to be this way.
Page_Load is grabbing the "id" QueryString and running a LoadItem method that I created to do things like:
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
'Load record by ID passed.
If (Request.QueryString("id") <> "") Then
LoadItem(Request.QueryString("id"))
End If
End Sub
Protected Sub LoadItem(ByVal PostingID As Long)
Dim _col As ProfessorPostingCollection = New ProfessorPostingCollection()
Dim item As ProfessorPosting = _col.FindByID(PostingID)
Me.cbSessionList.SetValue(item.SessionCode)
Me.cbFacultyList.SetValue(item.FacultyCode)
Me.cbDepartmentList.SetValue(item.DepartmentCode)
Me.txtPostingID.Text = item.PostingID
Me.cbJobClass.SetValue(item.JobClassCode)
....
I have Store's linking to BLL (business logic layer) code using ObjectDataSource as follows, and the Load Handler on stoDepartmentList (Store) is what triggers the session state bugs:
<asp:ObjectDataSource ID="dsSessionList" runat="server" SelectMethod="GetSessionList"
TypeName="UOttawa.BusinessObjects.SysParmCollection"
OldValuesParameterFormatString="original_{0}" >
</asp:ObjectDataSource>
<ext:Store ID="stoSessionList" runat="server" DataSourceID="dsSessionList">
<Reader>
<ext:JsonReader ReaderID="CodeName">
<Fields>
<ext:RecordField Name="CodeName" />
<ext:RecordField Name="CodeValue" />
</Fields>
</ext:JsonReader>
</Reader>
</ext:Store>
<asp:ObjectDataSource ID="dsFacultyList" runat="server" SelectMethod="GetFacultyList"
TypeName="UOttawa.BusinessObjects.SysParmCollection"
OldValuesParameterFormatString="original_{0}" >
</asp:ObjectDataSource>
<ext:Store ID="stoFacultyList" runat="server" DataSourceID="dsFacultyList">
<Reader>
<ext:JsonReader ReaderID="CodeName">
<Fields>
<ext:RecordField Name="CodeName" />
<ext:RecordField Name="CodeValue" />
</Fields>
</ext:JsonReader>
</Reader>
</ext:Store>
<asp:ObjectDataSource ID="dsDepartmentList" runat="server" SelectMethod="GetFacultyDepartmentList"
TypeName="UOttawa.BusinessObjects.SysParmCollection"
OldValuesParameterFormatString="original_{0}" >
<SelectParameters>
<asp:Parameter DefaultValue="" Name="FacultyCode" Type="String" />
</SelectParameters>
</asp:ObjectDataSource>
<ext:Store ID="stoDepartmentList" runat="server" DataSourceID="dsDepartmentList" OnRefreshData="LoadDepartmentByFaculty">
<Reader>
<ext:JsonReader ReaderID="CodeName">
<Fields>
<ext:RecordField Name="CodeName" />
<ext:RecordField Name="CodeValue" />
</Fields>
</ext:JsonReader>
</Reader>
<Listeners>
<Load Handler="#{cbDepartmentList}.setValue(this.getAt(0).data[#{cbFacultyList}.valueField]);" />
</Listeners>
</ext:Store>
Anything where I use 'SetValue' for a ComboBox or DateField is not loading properly on Page_Load event, and the ComboBox's do NOT save the session state of itself.
Here is what I mean:
Me.cbSessionList.SetValue(item.SessionCode)
Me.cbFacultyList.SetValue(item.FacultyCode)
Me.cbDepartmentList.SetValue(item.DepartmentCode)
These values as stated above, I load upon Page_Load it sets the 'default value' of the ComboBox ie. Session - 20101, Faculty - ARTS, Department - ARV... when I select a faculty without storing its session state from the OnRefreshData="LoadDepartmentByFaculty" method like this:
Protected Sub LoadDepartmentByFaculty(ByVal sender As Object, ByVal e As StoreRefreshDataEventArgs)
Me.cbSessionList.SetValue(Me.cbSessionList.SelectedItem.Value)
Me.cbFacultyList.SetValue(Me.cbFacultyList.SelectedItem.Value)
Me.cbDepartmentList.SetValue(Me.cbDepartmentList.SelectedItem.Value)
Me.cbJobClass.SetValue(Me.cbJobClass.SelectedItem.Value)
dsDepartmentList.SelectParameters("FacultyCode").DefaultValue = Me.cbFacultyList.SelectedItem.Value
dsDepartmentList.DataBind()
End Sub
To me, I shouldn't need to set the value of the Session, Faculty, Department on my own, it should happen at the same time it is changed in the ComboBox... for example, I start off with Page_Load Session - Winter 2010, Faculty of Arts and Visual Arts, I select a different session Fall 2010. Then if I choose a new Faculty without "Me.cbSessionList.SetValue(Me.cbSessionList.SelectedItem.Value)" line of code it whipes out Fall 2010 and reverts back to the Page_Load value of 'Winter 2010' weird isn't it?
Has anyone else had problems saving session state of ComboBox and DateField? This is a BIG issue, and to me is a problem with Coolite's behavior and session state handling, in my opinion it is not up to the developer to track which ComboBox have changed since Page_Load, at least that's not the Microsoft .NET way of things.
If you're able to respond with VB.NET or C# examples, I know both.
thank you kindly,
---James
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Hi James,
I've spent some time trying to figure out what you're doing based upon your description and piece together a sample that attempts to reproduce any Session issues with the ComboBox. So far this is what I have.
Example
<%@ Page Language="C#" %>
<%@ Register Assembly="Coolite.Ext.Web" Namespace="Coolite.Ext.Web" TagPrefix="ext" %>
<script runat="server">
protected void Page_Load(object sender, EventArgs e)
{
if (!Ext.IsAjaxRequest)
{
object session = this.Session["Session"];
if (session != null)
{
this.Label1.Text = session.ToString();
this.ComboBox1.SetValue(session);
}
object faculty = this.Session["Faculty"];
if (faculty != null)
{
this.Label2.Text = faculty.ToString();
this.ComboBox2.SetValue(faculty);
}
object department = this.Session["Department"];
if (department != null)
{
this.Label3.Text = department.ToString();
this.ComboBox3.SetValue(department);
}
}
}
protected void Button1_Click(object sender, AjaxEventArgs e)
{
this.Session["Session"] = this.ComboBox1.SelectedItem.Value;
this.Session["Faculty"] = this.ComboBox2.SelectedItem.Value;
this.Session["Department"] = this.ComboBox3.SelectedItem.Value;
}
protected void Button2_Click(object sender, AjaxEventArgs e)
{
this.Session["Session"] = null;
this.Session["Faculty"] = null;
this.Session["Department"] = null;
}
</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>Coolite Toolkit Example</title>
</head>
<body>
<form id="form1" runat="server">
<ext:ScriptManager ID="ScriptManager1" runat="server" />
<a href="Simple2.aspx">Reload</a>
<ext:Panel
ID="Panel1"
runat="server"
Width="400"
AutoHeight="true"
Title="Title"
BodyStyle="padding:6px;">
<Body>
<ext:FormLayout runat="server">
<Anchors>
<ext:Anchor Horizontal="100%">
<ext:ComboBox ID="ComboBox1" runat="server" FieldLabel="Session">
<Items>
<ext:ListItem Text="Spring" />
<ext:ListItem Text="Summer" />
<ext:ListItem Text="Fall" />
<ext:ListItem Text="Winter" />
</Items>
</ext:ComboBox>
</ext:Anchor>
<ext:Anchor Horizontal="100%">
<ext:ComboBox ID="ComboBox2" runat="server" FieldLabel="Faculty">
<Items>
<ext:ListItem Text="Arts" />
<ext:ListItem Text="Bussiness" />
<ext:ListItem Text="Medicine" />
<ext:ListItem Text="Engineering" />
</Items>
</ext:ComboBox>
</ext:Anchor>
<ext:Anchor Horizontal="100%">
<ext:ComboBox ID="ComboBox3" runat="server" FieldLabel="Department">
<Items>
<ext:ListItem Text="101" />
<ext:ListItem Text="201" />
<ext:ListItem Text="301" />
<ext:ListItem Text="401" />
</Items>
</ext:ComboBox>
</ext:Anchor>
</Anchors>
</ext:FormLayout>
</Body>
<Buttons>
<ext:Button ID="Button1" runat="server" Text="Set Session Values">
<AjaxEvents>
<Click OnEvent="Button1_Click" />
</AjaxEvents>
</ext:Button>
<ext:Button ID="Button2" runat="server" Text="Clear Session Values">
<AjaxEvents>
<Click OnEvent="Button2_Click" />
</AjaxEvents>
</ext:Button>
</Buttons>
</ext:Panel>
<ext:Label ID="Label1" runat="server" Format="Session: {0}" /><br />
<ext:Label ID="Label2" runat="server" Format="Faculty: {0}" /><br />
<ext:Label ID="Label3" runat="server" Format="Department: {0}" />
</form>
</body>
</html>
I haven't run into any yet with the Session handling. Can you modify the above sample to reproduce the Session issue?
--
Geoffrey McGill
Coolite Inc.
Development Team
Skype : geoffrey.mcgill
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