Hello gentleman/ladies.
Recently I found that I have a problem with EO.Web.Grid control.
I have two grids. The first grid is databinded to a datatable and has attached ClientSideOnItemSelected javascript function, which clears the data in the second grid by iterating through items and cells and calling functions cell.setValue(null); cell.refresh();
After the second grid is cleared I'm evaluating a column data on the selected item from the first grid and populate it to the second one with cell.setValue(data) function.
The second grid has N columns and fixed number of rows (in this case 7).
I found that when I click quickly many times on the first grid and setting data to the second one the allocated memory by Internet Exlorer 8 grows not constantly but approx. with 400KB.
In the result of that after several Megabytes of leak when I press the save button, which is attached to a callback pannel becomes an error like:
[ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length].
When i comment the two statements cell.setValue(data); and cell.refresh(); there is no leak.
If I click not many times, leak is not big and save is ok.
I'm using latest release published on your site: 2010.0.40.2
The ASP .NET web application is developed with MS Visual Studio 2010 and .NET framework 3.5
Here is a sample page;
<%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Default.aspx.vb" Inherits="WebApplication2._Default" %>
<%@ Register assembly="EO.Web" namespace="EO.Web" tagprefix="eo" %>
<!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></title>
</head>
<body>
<form id="form1" runat="server">
<div>
<eo:CallbackPanel ID="CallbackPanel1" runat="server" Height="600px"
Width="900px" Triggers="{ControlID:Button1;Parameter:}">
<eo:Grid ID="Grid1" runat="server" BorderColor="#828790"
BorderWidth="1px" ColumnHeaderAscImage="00050204"
ColumnHeaderDescImage="00050205" ColumnHeaderDividerImage="00050203"
ColumnHeaderHeight="24" FixedColumnCount="1" Font-Bold="False"
Font-Italic="False" Font-Names="Tahoma" Font-Overline="False"
Font-Size="8.75pt" Font-Strikeout="False" Font-Underline="False"
GridLineColor="240, 240, 240" GridLines="Both" Height="200px" ItemHeight="19"
Width="596px" ClientSideOnItemSelected="OnItemSelected">
<FooterStyle CssText="padding-bottom:4px;padding-left:4px;padding-right:4px;padding-top:4px;" />
<ItemStyles>
<eo:GridItemStyleSet>
<ItemStyle CssText="background-color: white" />
<ItemHoverStyle CssText="background-image: url(00050206); background-repeat: repeat-x" />
<SelectedStyle CssText="background-image: url(00050207); background-repeat: repeat-x" />
<CellStyle CssText="padding-left:8px;padding-top:2px;white-space:nowrap;" />
</eo:GridItemStyleSet>
</ItemStyles>
<ColumnHeaderHoverStyle CssText="background-image:url('00050202');padding-left:8px;padding-top:4px;" />
<Columns>
<eo:RowNumberColumn>
</eo:RowNumberColumn>
<eo:StaticColumn DataField="TEST_1" HeaderText="TEST_1" Name="TEST_1">
</eo:StaticColumn>
<eo:StaticColumn DataField="TEST_2" HeaderText="TEST_2" Name="TEST_2">
</eo:StaticColumn>
<eo:StaticColumn DataField="TEST_3" HeaderText="TEST_3" Name="TEST_3">
</eo:StaticColumn>
<eo:StaticColumn DataField="TEST_4" HeaderText="TEST_4" Name="TEST_4"
Visible="False">
</eo:StaticColumn>
</Columns>
<ColumnHeaderStyle CssText="background-image:url('00050201');padding-left:8px;padding-top:4px;" />
</eo:Grid>
<eo:Grid ID="Grid2" runat="server" BorderColor="#828790" BorderWidth="1px"
ClientSideOnItemSelected="OnItemSelected" ColumnHeaderAscImage="00050204"
ColumnHeaderDescImage="00050205" ColumnHeaderDividerImage="00050203"
ColumnHeaderHeight="24" FixedColumnCount="1" Font-Bold="False"
Font-Italic="False" Font-Names="Tahoma" Font-Overline="False"
Font-Size="8.75pt" Font-Strikeout="False" Font-Underline="False"
GridLineColor="240, 240, 240" GridLines="Both" Height="200px" ItemHeight="19"
Width="596px">
<FooterStyle CssText="padding-bottom:4px;padding-left:4px;padding-right:4px;padding-top:4px;" />
<ItemStyles>
<eo:GridItemStyleSet>
<ItemStyle CssText="background-color: white" />
<ItemHoverStyle CssText="background-image: url(00050206); background-repeat: repeat-x" />
<SelectedStyle CssText="background-image: url(00050207); background-repeat: repeat-x" />
<CellStyle CssText="padding-left:8px;padding-top:2px;white-space:nowrap;" />
</eo:GridItemStyleSet>
</ItemStyles>
<ColumnHeaderHoverStyle CssText="background-image:url('00050202');padding-left:8px;padding-top:4px;" />
<Columns>
<eo:RowNumberColumn>
</eo:RowNumberColumn>
<eo:StaticColumn DataField="" HeaderText="TEST_1" Name="TEST_1">
</eo:StaticColumn>
<eo:StaticColumn DataField="" HeaderText="TEST_2" Name="TEST_2">
</eo:StaticColumn>
<eo:StaticColumn DataField="" HeaderText="TEST_3" Name="TEST_3">
</eo:StaticColumn>
<eo:StaticColumn DataField="" HeaderText="TEST_4" Name="TEST_4" Visible="False">
</eo:StaticColumn>
</Columns>
<ColumnHeaderStyle CssText="background-image:url('00050201');padding-left:8px;padding-top:4px;" />
</eo:Grid>
<asp:Button ID="Button1" runat="server" Text="Button" />
</eo:CallbackPanel>
</div>
<script type="text/javascript">
function Grid2_Populate() {
var row = 0;
for (row = 0; row < 5; row++) {
Grid2.addItem();
}
}
Grid2_Populate();
function OnItemSelected(item) {
var row = 0;
var col = 0;
for (row = 0; row < 5; row++) {
for (col = 0; col < 4; col++) {
Grid2.getItem(row).getCell(col).setValue(row*col);
}
}
}
</script>
</form>
</body>
</html>
Partial Public Class _Default
Inherits System.Web.UI.Page
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
Dim dt As New DataTable
dt.Columns.Add("TEST_1")
dt.Columns.Add("TEST_2")
dt.Columns.Add("TEST_3")
dt.Columns.Add("TEST_4")
Dim params(3) As Object
For row = 0 To 4
For col As Integer = 0 To 3
params(col) = row * col
Next
dt.Rows.Add(params)
Next
Grid1.DataSource = dt
Grid1.DataBind()
End Sub
End Class
Click on the first grid and see how IE memory grows, after 10 Megs press the button and see how IE hungs.
After several minutes IE shows dialog with message like:
EO.Web Controls Client Side Debug Message
EO.Web control 'CallbackPanle1' error message: The callback on 'CallbackPanel1' has failed due to a server side exception. Click OK to see exception message. (set ClientSideOnError to handle this error).
You can turn off this message by setting EO.Web.Runtime.DebugLevel to 0 (Not recommended for debug build).
And after pressing the 'OK' button here is the error:
Server Error in '/' Application.
Index and length must refer to a location within the string.
Parameter name: length
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.ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length
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:
[ArgumentOutOfRangeException: Index and length must refer to a location within the string.
Parameter name: length]
System.String.InternalSubStringWithChecks(Int32 startIndex, Int32 length, Boolean fAlwaysCopy) +7495179
System.String.Substring(Int32 startIndex, Int32 length) +11
EO.Web.Internal.StateDataReader.ReadString() +119
EO.Web.Internal.ik.a(String A_0) +517
EO.Web.Internal.ik.a(String A_0) +535
EO.Web.Internal.ik.a(String A_0) +535
EO.Web.Internal.an.b(String A_0) +250
EO.Web.Internal.an.a(String A_0, String A_1) +1084
EO.Web.Internal.an.a(String A_0, String A_1, String A_2) +85
EO.Web.Internal.an.b(String A_0, String A_1) +39
EO.Web.Internal.bx.aa() +436
EO.Web.WebControlBase.a(Object A_0) +129
EO.Web.CallbackPanel.a(Object A_0) +65
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.Page.LoadAllState() +312
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1661
Version Information: Microsoft .NET Framework Version:2.0.50727.3615; ASP.NET Version:2.0.50727.3618