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[CLOSED] How to call CellSelect event from codebehind

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  1. #1
    Feb 15, 2012, 6:21 PM

    [CLOSED] How to call CellSelect event from codebehind

    Hi All,

    I created the GridPanel from codebehind and now I tried to call the event "CellSelect" in the same way but
    I receive at the run time the error "object expected"

    The my source code is : 

    CellSelectionModel cellSelectionModel = new CellSelectionModel();
            cellSelectionModel.Listeners.CellSelect.Handler = "Cellclick()";
            gridPanelReportBacklog.SelectionModel.Add(cellSelectionModel);

        protected void Cellclick(object sender, DirectEventArgs e) {
            CellSelectionModel sm = (CellSelectionModel) this.gridPanelReportBacklog.SelectionModel.Primary;
            string phase = gridPanelReportBacklog.ColumnModel.Columns[sm.SelectedCell.ColIndex].Header;
                 }
    Error details: URI: http://localhost/trp/(S(a4ebwi55o5i2fi55drwcgo55))
    /extjs/ext-all-js/ext.axd?v=37522

    Can you help me for this issue?
    I hope was clear.
    Thanks
    Last edited by Daniil; Feb 27, 2012 at 8:57 AM. Reason: Please use [CODE] tags, [CLOSED]
  2. #2
    Feb 15, 2012, 7:59 PM
    Hi,

    Please clarify what moment does the error occur and when do you create a GridPanel - during initial page load or during DirectEvent?

    Also, please clarify are you expecting to call "Cellclick" DirectEvent handler this way?
    cellSelectionModel.Listeners.CellSelect.Handler = "Cellclick()";
    The DirectEvent handler should be attached this way:
    cellSelectionModel.DirectEvents.CellSelect.Event += Cellclick;
  3. #3
    Feb 15, 2012, 9:55 PM
    Hi,

    I create the gridPanel during the DirectEvent of button.
    I agree with you on change my code as you suggest 

    cellSelectionModel.DirectEvents.CellSelect.Event += Cellclick;
    but I receive the NullReferenceException. Run time error when I click on the GridPanel cell

    Click image for larger version.  Name: Cattura1.JPG  Views: 50  Size: 93.5 KB  ID: 3833

    Thank you so much for your support.
    Last edited by Daniil; Feb 20, 2012 at 5:53 PM. Reason: Please use [CODE] tags
  4. #4
    Feb 16, 2012, 7:59 AM
    Please follow:
    http://forums.ext.net/showthread.php...ll=1#post60155
  5. #5
    Feb 20, 2012, 5:49 PM
    Hi,

    Now it works,
    the event run correctly when I click on the GridPanel cell but the row index and column index is not inizialized. I receive out of range exception because 
    sm.SelectedCell.ColIndex = -1
    My Page_Load 

    CellSelectionModel cellSelectionModel = new CellSelectionModel();
            cellSelectionModel.ID = "cellSelectionModelBacklog";
            cellSelectionModel.DirectEvents.CellSelect.Event += new ComponentDirectEvent.DirectEventHandler(CellSelected);
            gridPanelReportBacklog.SelectionModel.Add(cellSelectionModel);
            gridPanelReportBacklog.Hidden = true;
            panelReportBacklog.Items.Add(gridPanelReportBacklog);
    Method CellSelected

     protected void CellSelected(object sender, DirectEventArgs e) {
            CellSelectionModel sm = (CellSelectionModel) this.gridPanelReportBacklog.SelectionModel.Primary;
            string phase = gridPanelReportBacklog.ColumnModel.Columns[sm.SelectedCell.ColIndex].Header;
        }
    Thanks
    Last edited by Daniil; Feb 20, 2012 at 5:53 PM. Reason: Please use [CODE] tags
  6. #6
    Feb 20, 2012, 6:01 PM
    Please create a CellSelectionModel within Page_Init instead of Page_Load.

    Example
    <%@ Page Language="C#" %>
 
<%@ Register Assembly="Ext.Net" Namespace="Ext.Net" TagPrefix="ext" %>

<script runat="server">
    protected void Page_Init(object sender, EventArgs e)
    {
        CellSelectionModel sm = new CellSelectionModel();
        sm.DirectEvents.CellSelect.Event += OnCellSelect;
        this.GridPanel1.SelectionModel.Add(sm);
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!X.IsAjaxRequest)
        {
            Store store = this.GridPanel1.GetStore();
            store.DataSource = new object[] 
            { 
                new object[] { "test1", "test2", "test3" },
                new object[] { "test4", "test5", "test6" },
                new object[] { "test7", "test8", "test9" },
            };
            store.DataBind();
        }
    }

    protected void OnCellSelect(object sender, DirectEventArgs e)
    {
        var sm = sender as CellSelectionModel;
        X.Msg.Alert("OnCellSelect", sm.SelectedCell.RowIndex + " : " + sm.SelectedCell.ColIndex).Show();
    }
</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 runat="server">
    <title>Ext.NET Example</title>
</head>
<body>
    <form runat="server">
        <ext:ResourceManager runat="server" />
        <ext:GridPanel ID="GridPanel1" runat="server" AutoHeight="true">
            <Store>
                <ext:Store runat="server">
                    <Reader>
                        <ext:ArrayReader>
                            <Fields>
                                <ext:RecordField Name="test1" />
                                <ext:RecordField Name="test2" />
                                <ext:RecordField Name="test3" />
                            </Fields>
                        </ext:ArrayReader>
                    </Reader>
                </ext:Store>
            </Store>
            <ColumnModel runat="server">
                <Columns>
                    <ext:Column Header="Test1" DataIndex="test1" />
                    <ext:Column Header="Test2" DataIndex="test2" />
                    <ext:Column Header="Test3" DataIndex="test3" />
                </Columns>
            </ColumnModel>
        </ext:GridPanel>
    </form>
</body>
</html>
  7. #7
    Feb 20, 2012, 6:21 PM
    I move the code as you suggest but I receive the same error
    Careful because the my GridPanel created from code behind
            private void Page_Init(object sender, System.EventArgs e) {
            this.defaultScreenView = new ViewDefaultScreen();
            this.gridPanelReportBacklog = new GridPanel();
            this.InitViewFields();
            
            CellSelectionModel cellSelectionModel = new CellSelectionModel();
            cellSelectionModel.ID = "cellSelectionModelBacklog";
            cellSelectionModel.DirectEvents.CellSelect.Event += CellSelected;
            gridPanelReportBacklog.SelectionModel.Add(cellSelectionModel);
        }
    Thank you so much
    Last edited by Daniil; Feb 21, 2012 at 4:37 AM. Reason: Please use [CODE] tags
  8. #8
    Feb 21, 2012, 4:38 AM
    Please provide a full sample to reproduce the problem, like the example I have posted.
  9. #9
    Feb 27, 2012, 7:08 AM
    The problem was that my GridPanel was in another panel but I forget to call the panel.Render()

    Thanks
  10. #10
    Feb 27, 2012, 8:17 AM
    Please clarify can we mark the thread as closed?
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