How to use WebNavBar | Infragistics Forums

1705

How to use WebNavBar

Ulises posted over 16 years ago

Hey guys,

I have a grid in a web user control that implements:

UltraWebGrid1.InitializeDataSource += new Infragistics.WebUI.UltraWebGrid.InitializeDataSourceEventHandler(UltraWebGrid1_InitializeDataSource);

UltraWebGrid1_InitializeDataSource queries the database, gets a datatable object and assigns it to the grid's datasource.

everything works fine.

However if I add the WebNavBar:

<ignavbar:webnavbar id="WebNavBar1" runat="server"              >
<Extension Visible="false" >
</Extension>
<Navigation Next-AutoPostBack="false" Prev-AutoPostBack= "false" End-AutoPostBack="false" Start-AutoPostBack="false" Rewind-AutoPostBack="false" FastForward-AutoPostBack="false" ></Navigation>
</ignavbar:webnavbar>

protected override void OnInit(EventArgs e)
{
    UltraWebGrid1.InitializeDataSource += new Infragistics.WebUI.UltraWebGrid.InitializeDataSourceEventHandler(UltraWebGrid1_InitializeDataSource);
    WebNavBar1.GridID = UltraWebGrid1.UniqueID;
}

and click Reverse or Forward I would get the following exception (all other buttons work just fine):

Object reference not set to an instance of an object.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

An unhandled exception was generated during the execution of the 
current web request. Information regarding the origin and location of the 
exception can be identified using the exception stack trace below.

Stack Trace:

[NullReferenceException: Object reference not set to an instance of an object.]
   Infragistics.WebUI.UltraWebGrid.RowsCollection.Infragistics.WebUI.UltraWebGrid.IXPathDataNavigable.GetFirstChild() +183
   Infragistics.WebUI.UltraWebGrid.RowsCollection.Infragistics.WebUI.UltraWebGrid.IXPathDataNavigable.get_HasChildren() +32
   Infragistics.WebUI.UltraWebGrid.XPathDataNavigator.OutputToStream(XPathDataNavigator xpdn, XmlTextWriter stream, HtmlTextWriter htmlWriter) +142
   Infragistics.WebUI.UltraWebGrid.RenderXmlGrid.WriteBody(HtmlTextWriter writer, RowsCollection rows, Boolean topLevel) +112
   Infragistics.WebUI.UltraWebGrid.RenderXmlGrid.WriteUltraWebGrid(HtmlTextWriter writer, UltraWebGrid grid, Boolean shouldWriteAll) +418
   Infragistics.WebUI.UltraWebGrid.RenderXmlGrid.VisitObjects(HtmlTextWriter output) +603
   Infragistics.WebUI.Shared.RendererBase.Render(HtmlTextWriter output) +36
   Infragistics.WebUI.UltraWebGrid.GridRendererBase.Render(HtmlTextWriter output) +482
   Infragistics.WebUI.UltraWebGrid.UltraWebGrid.Render(HtmlTextWriter output) +336
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.UpdatePanel.RenderChildren(HtmlTextWriter writer) +236
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.UpdatePanel.Render(HtmlTextWriter writer) +32
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.HtmlControls.HtmlForm.RenderChildren(HtmlTextWriter writer) +59
   System.Web.UI.HtmlControls.HtmlForm.Render(HtmlTextWriter output) +68
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.HtmlControls.HtmlForm.RenderControl(HtmlTextWriter writer) +37
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.Control.Render(HtmlTextWriter writer) +7
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Control.RenderChildrenInternal(HtmlTextWriter writer, ICollection children) +199
   System.Web.UI.Control.RenderChildren(HtmlTextWriter writer) +20
   System.Web.UI.Page.Render(HtmlTextWriter writer) +26
   System.Web.UI.Control.RenderControlInternal(HtmlTextWriter writer, ControlAdapter adapter) +25
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer, ControlAdapter adapter) +121
   System.Web.UI.Control.RenderControl(HtmlTextWriter writer) +22
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2558

Version Information: Microsoft .NET Framework Version:2.0.50727.1433; ASP.NET Version:2.0.50727.1433

I had a similar problem with another grid and I solved it reassigning the datasource to the grid on these events:

onaftermovenext="WebNavBar1_Move"
onaftermoveprev="WebNavBar1_Move"
onaftermovetoend="WebNavBar1_Move"
onaftermovetostart="WebNavBar1_Move"

I haven't had the same luck with this grid.

Can somebody help please?

Thanks !

1705

Ulises posted over 16 years ago in reply to [Infragistics] Nikola Genov

After spending a lot of time trying to recreate the error on a small project so later I could send it to you, as requested, I was able to find the cause.

Setting the property Browser="Xml" will throw the exception mentioned before.

I found out about this by applying the following Skin:

<igtbl:UltraWebGrid runat="server"
Browser="Xml"
ImageDirectory="~/App_Themes/Default/Office2007Blue/WebGrid/">
<DisplayLayout
    AllowColSizingDefault="Free"
    AllowColumnMovingDefault="OnServer"
    AllowDeleteDefault="Yes"
    AllowUpdateDefault="Yes"
    AllowSortingDefault="Yes"
    BorderCollapseDefault="Separate"
    CellClickActionDefault="RowSelect"
    CompactRendering="True"
    GridLinesDefault="NotSet"
    LoadOnDemand="Automatic"
    Name="ctl12xUltraWebGrid1"
    RowHeightDefault="20px"
    RowSelectorsDefault="No"
    SelectTypeRowDefault="Extended"
    StationaryMargins="Header"
    StationaryMarginsOutlookGroupBy="True"
    TableLayout="Fixed"
    Version="4.00"
    ViewType="OutlookGroupBy"
    HeaderClickActionDefault="SortMulti"
    NoDataMessage ="No records were found">
    <GroupByBox>
      <BandLabelStyle
        CssClass="igwgGrpBoxBandLblBlue2k7">
      </BandLabelStyle>
      <Style
        CssClass="igwgGrpBoxBlue2k7">
      </Style>
    </GroupByBox>
    <GroupByRowStyleDefault CssClass="igwgGrpRowBlue2k7"></GroupByRowStyleDefault>
    <ActivationObject BorderColor="181, 196, 223" BorderWidth="">
      <BorderDetails WidthLeft="0px" WidthRight="0px" />
    </ActivationObject>
    <RowExpAreaStyleDefault CssClass="igwgRowExpBlue2k7"></RowExpAreaStyleDefault>
    <FooterStyleDefault CssClass="igwgFooterBlue2k7"></FooterStyleDefault>
    <SelectedGroupByRowStyleDefault CssClass="igwgGrpRowSelBlue2k7"></SelectedGroupByRowStyleDefault>
    <RowStyleDefault CssClass="igwgRowBlue2k7" Cursor="Hand">
      <BorderDetails WidthBottom="1px" WidthTop="1px" />
      <Padding Left="3px" />
    </RowStyleDefault>
    <FilterOptionsDefault AllowRowFiltering="OnServer" FilterUIType="FilterRow" FilterComparisonType="CaseInsensitive" RowFilterMode="AllRowsInBand" >
      <FilterOperandDropDownStyle BackColor="White" BorderColor="Silver" BorderStyle="Solid"
        BorderWidth="1px" CustomRules="overflow:auto;" Font-Names="Verdana,Arial,Helvetica,sans-serif"
        Font-Size="11px">
        <Padding Left="2px" />
      </FilterOperandDropDownStyle>
      <FilterHighlightRowStyle BackColor="#151C55" ForeColor="White">
      </FilterHighlightRowStyle>
      <FilterDropDownStyle BackColor="White" BorderColor="Silver" BorderStyle="Solid" BorderWidth="1px"
        CustomRules="overflow:auto;" Font-Names="Verdana,Arial,Helvetica,sans-serif" Font-Size="11px"
        Width="200px">
        <Padding Left="2px" />
      </FilterDropDownStyle>
    </FilterOptionsDefault>
    <RowSelectorStyleDefault CssClass="igwgRowSlctrBlue2k7"></RowSelectorStyleDefault>
    <FixedHeaderStyleDefault CssClass="igwgHdrFxdBlue2k7"></FixedHeaderStyleDefault>
    <SelectedRowStyleDefault CssClass="igwgRowSelBlue2k7"></SelectedRowStyleDefault>
    <HeaderStyleDefault CssClass="igwgHdrBlue2k7" Height="23px"></HeaderStyleDefault>
    <RowAlternateStyleDefault CssClass="igwgRowAltBlue2k7"></RowAlternateStyleDefault>
    <Images
      ImageDirectory="~/App_Themes/Default/Office2007Blue/WebGrid/">
    </Images>
    <SelectedHeaderStyleDefault CssClass="igwgHdrSelBlue2k7"></SelectedHeaderStyleDefault>
    <FormulaErrorStyleDefault CssClass="igwgFormulaErrBlue2k7"></FormulaErrorStyleDefault>
    <EditCellStyleDefault CssClass="igwgCellEdtBlue2k7"></EditCellStyleDefault>
    <FrameStyle CssClass="igwgFrameBlue2k7" Width="100%" Height="300px"></FrameStyle>
    <FixedCellStyleDefault CssClass="igwgCellFxdBlue2k7"></FixedCellStyleDefault>
    <FixedFooterStyleDefault CssClass="igwgFtrFxdBlue2k7"></FixedFooterStyleDefault>
    <Pager AllowPaging="True" PageSize="100" StyleMode="PrevNext" >
      <Style CssClass="igwgPgrBlue2k7"></Style>
    </Pager>
    <AddNewBox Hidden="False" Prompt="Add" View="Compact" >
      <ButtonStyle CssClass="igwgAddNewBtnBlue2k7"></ButtonStyle>
      <Style CssClass="igwgAddNewBoxBlue2k7"></Style>
    </AddNewBox>
</DisplayLayout>
</igtbl:UltraWebGrid>

Any thoughts?
Let me know if you still need me to send you the project.

THANKS !
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3147

[Infragistics] Nikola Genov posted over 16 years ago

Hi, I'm not able to reproduce the problem, I'm sending you PM with my email, please reply with the project attached including sample DB if possible.

-Nick
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