Loading Selected dock layout from database

2 posts, 0 answers
  1. Mark
    Mark avatar
    2 posts
    Member since:
    Jan 2009

    Posted 29 Jan 2010 Link to this post

    I have successfully implemented from your sample a portal page using the dock that saves and reloads from the database dependant on user. However the user has different roles and therefore different portal pages. This is selected by a dropdown on the page.

    The problem I am having is as the dynamically loaded dock state is actioned on the initialization of the page the new selected value of the dropdown is not available until the load stage.

    Can you please advise how I can load the dock from the database dependant on the selected value of the dropdown.

    Thanks

    Mark

    Private _conn As New SqlConnection(ConfigurationManager.ConnectionStrings("myConnectionString").ConnectionString)  
     
        Private ReadOnly Property CurrentDockStates() As List(Of DockState)  
            Get 
                'Get saved state string from the database - set it to dockState variable for example   
                Dim dockStatesFromDB As String = "" 
     
                _conn.Open()  
                Dim command As New SqlCommand("select State from States where id='" + Me.DropDownList1.SelectedValue.ToString + "'", _conn)  
                dockStatesFromDB = command.ExecuteScalar().ToString()  
                _conn.Close()  
     
                Dim _currentDockStates As New List(Of DockState)()  
                Dim stringStates As String() = dockStatesFromDB.Split("|"c)  
                For Each stringState As String In stringStates  
                    If stringState.Trim() <> String.Empty Then 
                        _currentDockStates.Add(DockState.Deserialize(stringState))  
                    End If 
                Next 
                Return _currentDockStates  
            End Get 
        End Property 
     
        Protected Sub Page_Init(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Init  
     
            'Recreate the docks in order to ensure their proper operation  
            Dim i As Integer = 0  
            While i < CurrentDockStates.Count  
                If CurrentDockStates(i).Closed = False Then 
                    Dim dock As RadDock = CreateRadDockFromState(CurrentDockStates(i))  
                    'We will just add the RadDock control to the RadDockLayout.  
                    ' You could use any other control for that purpose, just ensure  
                    ' that it is inside the RadDockLayout control.  
                    ' The RadDockLayout control will automatically move the RadDock  
                    ' controls to their corresponding zone in the LoadDockLayout  
                    ' event (see below).  
     
                    'We want to save the dock state every time a dock is moved.  
                    CreateSaveStateTrigger(dock)  
                    'Load the selected widget  
                    LoadWidget(dock)  
     
                    RadDockLayout1.Controls.Add(dock)  
                End If 
                System.Math.Max(System.Threading.Interlocked.Increment(i), i - 1)  
            End While 
        End Sub 
     
        Protected Sub RadDockLayout1_LoadDockLayout(ByVal sender As Object, ByVal e As DockLayoutEventArgs)  
            'Populate the event args with the state information. The RadDockLayout control  
            ' will automatically move the docks according that information.  
            For Each state As DockState In CurrentDockStates  
                e.Positions(state.UniqueName) = state.DockZoneID  
                e.Indices(state.UniqueName) = state.Index  
            Next 
        End Sub 
     
        Protected Sub RadDockLayout1_SaveDockLayout(ByVal sender As Object, ByVal e As DockLayoutEventArgs)  
            Dim stateList As List(Of DockState) = Me.RadDockLayout1.GetRegisteredDocksState()  
            Dim serializedList As New StringBuilder()  
            Dim i As Integer = 0  
     
            While i < stateList.Count  
                serializedList.Append(stateList(i).ToString())  
                serializedList.Append("|")  
                System.Math.Max(System.Threading.Interlocked.Increment(i), i - 1)  
            End While 
     
            Dim dockState As String = serializedList.ToString()  
            If dockState.Trim() <> [String].Empty Then 
                _conn.Open()  
                Dim command As New SqlCommand([String].Format("update States set State='{0}' where id='" + Me.DropDownList1.SelectedValue.ToString + "'", dockState), _conn)  
                command.ExecuteNonQuery()  
                _conn.Close()  
            End If 
        End Sub 
     
        Private Function CreateRadDockFromState(ByVal state As DockState) As RadDock  
            Dim dock As New RadDock()  
            dock.DockMode = DockMode.Docked  
            dock.ID = String.Format("RadDock{0}", state.UniqueName)  
            dock.ApplyState(state)  
            dock.EnableAnimation = True 
     
            dock.Commands.Add(New DockCloseCommand)  
            dock.Commands.Add(New DockExpandCollapseCommand())  
     
            Return dock  
        End Function 
     
        Private Function CreateRadDock() As RadDock  
            Dim docksCount As Integer = CurrentDockStates.Count  
     
            Dim dock As New RadDock()  
            dock.DockMode = DockMode.Docked  
            dock.UniqueName = Guid.NewGuid().ToString()  
            dock.ID = String.Format("RadDock{0}", dock.UniqueName)  
            dock.Title = Replace(Replace(DroptDownWidget.SelectedItem.Text, ".ascx", ""), "_", " ")  
            dock.EnableAnimation = True 
     
            dock.Text = String.Format("Added at {0}", DateTime.Now)  
            dock.Width = Unit.Pixel(386)  
     
            dock.Commands.Add(New DockCloseCommand())  
            dock.Commands.Add(New DockExpandCollapseCommand())  
            dock.CommandsAutoPostBack = True 
     
            Return dock  
        End Function 
     
        Private Sub CreateSaveStateTrigger(ByVal dock As RadDock)  
            'Ensure that the RadDock control will initiate postback  
            ' when its position changes on the client or any of the commands is clicked.  
            'Using the trigger we will "ajaxify" that postback.  
            dock.AutoPostBack = True 
            dock.CommandsAutoPostBack = True 
     
            Dim updatedControl As New AjaxUpdatedControl()  
            updatedControl.ControlID = "Panel1" 
     
            Dim setting1 As New AjaxSetting(dock.ID)  
            setting1.EventName = "DockPositionChanged" 
            setting1.UpdatedControls.Add(updatedControl)  
     
            Dim setting2 As New AjaxSetting(dock.ID)  
            setting2.EventName = "Command" 
            setting2.UpdatedControls.Add(updatedControl)  
     
            RadAjaxManager1.AjaxSettings.Add(setting1)  
            RadAjaxManager1.AjaxSettings.Add(setting2)  
     
     
        End Sub 
     
        Private Sub LoadWidget(ByVal dock As RadDock)  
            If String.IsNullOrEmpty(dock.Tag) Then 
                Return 
            End If 
            Dim widget As Control = LoadControl(dock.Tag)  
            dock.ContentContainer.Controls.Add(widget)  
        End Sub 
     
        Protected Sub ButtonAddDock_Click(ByVal sender As Object, ByVal e As EventArgs)  
            Dim dock As RadDock = CreateRadDock()  
            'find the target zone and add the new dock there  
            Dim dz As RadDockZone = DirectCast(XMLUtilities.FindControlRecursive(Master, "RadDockZone1"), RadDockZone)  
     
            dz.Controls.Add(dock)  
     
            CreateSaveStateTrigger(dock)  
     
            'Load the selected widget in the RadDock control  
            dock.Tag = DroptDownWidget.SelectedValue  
     
            LoadWidget(dock)  
            ScriptManager.RegisterStartupScript(Me, Me.[GetType](), "MoveDock", String.Format("function _moveDock() {{" & vbCr & vbLf & vbTab & vbTab & vbTab & "        " & vbTab & "Sys.Application.remove_load(_moveDock);" & vbCr & vbLf & vbTab & vbTab & vbTab & vbTab & "        $find('{1}').dock($find('{0}'),{2});" & vbCr & vbLf & vbTab & vbTab & vbTab & "            }};" & vbCr & vbLf & vbTab & vbTab & vbTab & "            Sys.Application.add_load(_moveDock);", "$find('<%= RadDock1.ClientID %>');", "RadDockZone1", dz.Docks.Count), True)  
     
        End Sub 
  3. Pero
    Admin
    Pero avatar
    1156 posts

    Posted 03 Feb 2010 Link to this post

    Hi Mark,

    You can find the control that posted the page back to the server with the following method:

    public Control GetPostBackControl(Page page)
    {
        Control control = null;
     
        eventTarget = page.Request.Params.Get("__EVENTTARGET");
        eventArgument = page.Request.Params.Get("__EVENTARGUMENT");
        if (eventTarget != null && eventTarget != string.Empty)
        {
            control = page.FindControl(eventTarget);
        }
        else
        {
            foreach (string ctl in page.Request.Form)
            {
                Control c = page.FindControl(ctl);
                if (c is RadComboBox)
                {
                    control = c;
                    break;
                }
            }
        }
        return control;
    }

    The page.Request.Params.Get("__EVENTTARGET"); contains the UniqueID of the control that posted back the page and page.Request.Params.Get("__EVENTARGUMENT"); contains the event arguments send. You can use a RadComboBox control to choose the current role and when the page is posted back you can extract the selected index at any stage in the page life cycle, from the event arguments sent by the ComboBox. Here is the source code of a project demonstrating this approach:

    .aspx
    <%@ Register Assembly="Telerik.Web.UI" Namespace="Telerik.Web.UI" TagPrefix="telerik" %>
    <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
    <head runat="server">
        <title></title>
    </head>
    <body>
        <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <div>
            <telerik:RadComboBox ID="RadComboBox1" runat="server" AutoPostBack="true">
                <Items>
                    <telerik:RadComboBoxItem Text="Item1" Value="Item1" />
                    <telerik:RadComboBoxItem Text="Item2" Value="Item2" />
                    <telerik:RadComboBoxItem Text="Item3" Value="Item3" />
                    <telerik:RadComboBoxItem Text="Item4" Value="Item4" />
                </Items>
            </telerik:RadComboBox>
            <br />
            <br />
            Control that caused postback:
            <asp:Label ID="Label1" runat="server" Text="[None]"></asp:Label><br />
            Event Arguments send by the ComboBox:
            <asp:Label ID="Label3" runat="server" Text="[None]"></asp:Label><br />
            Item selected from the dropdown:
            <asp:Label ID="Label2" runat="server" Text="[None]"></asp:Label>
        </div>
        </form>
    </body>
    </html>

    .cs
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Web;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using Telerik.Web.UI;
    using System.Web.Script.Serialization;
     
    public partial class Default2 : System.Web.UI.Page
    {
        string eventTarget = "Index";
        string eventArgument = "Index";
     
        protected void Page_Init(object sender, EventArgs e)
        {
            GetPostBackControl(Page);
        }
     
        protected void Page_Load(object sender, EventArgs e)
        {
            if (IsPostBack)
            {
                Label1.Text = eventTarget;
                Label3.Text = eventArgument;
     
                //The following lines will find the currently selected index of the combobox
                int begin = eventArgument.IndexOf("Index") + 7;
                int indexClicked = Convert.ToInt32(eventArgument.Substring(begin, 1));
     
                Label2.Text = eventArgument.Substring(begin, 1);
     
            }
     
        }
     
        public Control GetPostBackControl(Page page)
        {
            Control control = null;
     
            eventTarget = page.Request.Params.Get("__EVENTTARGET");
            eventArgument = page.Request.Params.Get("__EVENTARGUMENT");
            if (eventTarget != null && eventTarget != string.Empty)
            {
                control = page.FindControl(eventTarget);
            }
            else
            {
                foreach (string ctl in page.Request.Form)
                {
                    Control c = page.FindControl(ctl);
                    if (c is RadComboBox)
                    {
                        control = c;
                        break;
                    }
                }
            }
            return control;
        }
    }


     

    Sincerely yours,
    Pero
    the Telerik team

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