Support,
I am having a NullReferenceException issue regarding your grid control while
implementing a very simple web page in our web application.
What is driving me crazy is the fact that I implemented in our same web
application a much more complicated web page using your grid and I was very
impressed with your control; I used textbox columns, custom columns with dropdown
lists, lots of client-side events, etc.
In the problem simple web page where I am using your grid, I have one static column
and one texbox column and, in order to edit info in the texbox cell, FullRowMode set
to false. I also have two ASP submit buttons (save and cancel) on the page that will
generate a postback. In the Page Load event I assign my data source and the info is
rendered correctly.
The issue is, if I simply click into a texbox cell (grid goes into edit mode) and then
click on one of my ASP buttons that should generate a postback, NO postback is generated
(page load event and button event does not fire). Instead I get a NullReferenceException
thrown which I have listed below. What is strange, is the error does not occur if I FIRST
click one of my buttons (which generates an inital postback) and then click into the textbox
cell. In fact, once I initially click one of my buttons I can go back and forth as many times
as I want clicking into the textbox edit cell and clicking one of my buttons.
Is there some setting on the grid that I may have forgotten about since my first implementation?
I could not see any differences that really stood out.
If it ends up being some kind of issue on your side, due to our client base, we would prefer not
to upgrade at this time unless a specific fix addresses this issue. We are currently using
version 7.0 (2009).
Below is the exception stack, the asp page listing, and my page load event for your review:
[NullReferenceException: Object reference not set to an instance of an object.]
EO.Web.Internal.c7.a(h9[] A_0) +858
EO.Web.Internal.c7.a(h9 A_0) +876
EO.Web.Internal.bt.aa() +352
EO.Web.WebControlBase.a(Object A_0) +71
EO.Web.Grid.a(Object A_0) +13
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +183
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +134
System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +221
System.Web.UI.Page.LoadAllState() +312
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="ItemRptCategoryMaint.aspx.cs" Inherits="HQWeb.Pages.ItemRptCategoryMaint" %>
<%@ Register Assembly="EO.Web" Namespace="EO.Web" TagPrefix="eo" %>
<%@ Register TagPrefix="uc1" TagName="PageHeaderTitle" Src="~/Controls/PageHeaderTitle.ascx" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head1" runat="server">
</head>
<body>
<form ID="form1" runat="server">
<table width="100%">
<tr>
<td>
<asp:Button ID="btnSave" runat="server" Text="Save" OnClick="btnSave_Click" />
</td>
<td>
<asp:Button ID="btnCancel" runat="server" Text="Cancel" OnClick="btnCancel_Click" />
</td>
<td align="left">
<eo:Grid ID="gItemRptCategoryGrp1" runat="server" BorderColor="Black" BorderWidth="1px" ColumnHeaderAscImage="00050403" ColumnHeaderDescImage="00050404" ColumnHeaderDividerImage="00050402" ColumnHeaderDividerOffset="6" ColumnHeaderHeight="18" FixedColumnCount="1" Font-Bold="False" Font-Italic="False" Font-Names="Verdana" Font-Overline="False" Font-Size="9pt" Font-Strikeout="False" Font-Underline="False" GridLineColor="240, 240, 240" GridLines="Both" Height="200px" ItemHeight="18" Width="395px" FullRowMode="False">
<FooterStyle CssText="padding-bottom:4px;padding-left:4px;padding-right:4px;padding-top:4px;" />
<ItemStyles>
<eo:GridItemStyleSet>
<ItemStyle CssText="background-color: white" />
<CellStyle CssText="padding-left:8px;padding-top:2px; color:#black;white-space:nowrap;" />
</eo:GridItemStyleSet>
</ItemStyles>
<ColumnTemplates>
<eo:TextBoxColumn>
<TextBoxStyle CssText="BORDER-RIGHT: #7f9db9 1px solid; PADDING-RIGHT: 2px; BORDER-TOP: #7f9db9 1px solid; PADDING-LEFT: 2px; FONT-SIZE: 8.75pt; PADDING-BOTTOM: 1px; MARGIN: 0px; BORDER-LEFT: #7f9db9 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: #7f9db9 1px solid; FONT-FAMILY: Tahoma" />
</eo:TextBoxColumn>
<eo:DateTimeColumn>
<DatePicker ControlSkinID="None" DayCellHeight="16" DayCellWidth="19" DayHeaderFormat="FirstLetter"
DisabledDates="" OtherMonthDayVisible="True" SelectedDates="" TitleLeftArrowImageUrl="DefaultSubMenuIconRTL"
TitleRightArrowImageUrl="DefaultSubMenuIcon">
<TodayStyle CssText="font-family: tahoma; font-size: 12px; border-right: #bb5503 1px solid; border-top: #bb5503 1px solid; border-left: #bb5503 1px solid; border-bottom: #bb5503 1px solid" />
<SelectedDayStyle CssText="font-family: tahoma; font-size: 12px; background-color: #fbe694; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid" />
<DisabledDayStyle CssText="font-family: tahoma; font-size: 12px; color: gray; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid" />
<PickerStyle CssText="border-bottom-color:#7f9db9;border-bottom-style:solid;border-bottom-width:1px;border-left-color:#7f9db9;border-left-style:solid;border-left-width:1px;border-right-color:#7f9db9;border-right-style:solid;border-right-width:1px;border-top-color:#7f9db9;border-top-style:solid;border-top-width:1px;font-family:Courier New;font-size:8pt;margin-bottom:0px;margin-left:0px;margin-right:0px;margin-top:0px;padding-bottom:1px;padding-left:2px;padding-right:2px;padding-top:2px;" />
<CalendarStyle CssText="background-color: white; border-right: #7f9db9 1px solid; padding-right: 4px; border-top: #7f9db9 1px solid; padding-left: 4px; font-size: 9px; padding-bottom: 4px; border-left: #7f9db9 1px solid; padding-top: 4px; border-bottom: #7f9db9 1px solid; font-family: tahoma" />
<TitleArrowStyle CssText="cursor:hand" />
<DayHoverStyle CssText="font-family: tahoma; font-size: 12px; border-right: #fbe694 1px solid; border-top: #fbe694 1px solid; border-left: #fbe694 1px solid; border-bottom: #fbe694 1px solid" />
<MonthStyle CssText="font-family: tahoma; font-size: 12px; margin-left: 14px; cursor: hand; margin-right: 14px" />
<TitleStyle CssText="background-color:#9ebef5;font-family:Tahoma;font-size:12px;padding-bottom:2px;padding-left:6px;padding-right:6px;padding-top:2px;" />
<OtherMonthDayStyle CssText="font-family: tahoma; font-size: 12px; color: gray; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid" />
<DayHeaderStyle CssText="font-family: tahoma; font-size: 12px; border-bottom: #aca899 1px solid" />
<DayStyle CssText="font-family: tahoma; font-size: 12px; border-right: white 1px solid; border-top: white 1px solid; border-left: white 1px solid; border-bottom: white 1px solid" />
</DatePicker>
</eo:DateTimeColumn>
<eo:MaskedEditColumn>
<MaskedEdit ControlSkinID="None" TextBoxStyle-CssText="BORDER-RIGHT: #7f9db9 1px solid; PADDING-RIGHT: 2px; BORDER-TOP: #7f9db9 1px solid; PADDING-LEFT: 2px; PADDING-BOTTOM: 1px; MARGIN: 0px; BORDER-LEFT: #7f9db9 1px solid; PADDING-TOP: 2px; BORDER-BOTTOM: #7f9db9 1px solid; font-family:Courier New;font-size:8pt;">
</MaskedEdit>
</eo:MaskedEditColumn>
</ColumnTemplates>
<Columns>
<eo:StaticColumn DataField="CategoryNumber" Name="CategoryNumber">
</eo:StaticColumn>
<eo:TextBoxColumn DataField="Description" HeaderText="xxDescription" Name="Description"
Width="301">
</eo:TextBoxColumn>
</Columns>
<ColumnHeaderStyle CssText="background-image:url('00050401');padding-left:8px;padding-top:2px;" />
</eo:Grid>
</td>
</tr>
</table>
</form>
</body>
</html>
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gItemRptCategoryGrp1.DataSource = ReportCategory.GetDataSource();
gItemRptCategoryGrp1.DataTable = "MyTestTable";
gItemRptCategoryGrp1.DataBind();
}
}
protected void btnSave_Click(object sender, EventArgs e)
{
}
protected void btnCancel_Click(object sender, EventArgs e)
{
}
THANK YOU VERY MUCH IN ADVANCE,
TOM