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Unknown Entity

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Grid

This is a migrated thread and some comments may be shown as answers.

Pamela asked on 20 May 2014, 07:39 AM

<%@ Page AutoEventWireup="false" CodeFile="PamTest.aspx.vb" Inherits="PamTest" %>

<%@ Register TagPrefix="telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">

<html>

<head>

<title>ASP.NET RibbonBar Demo - Quick Access Toolbar</title>

</head>

<body>

<form id="form1" runat="server">

<telerik:RadScriptManager runat="server" ID="RadScriptManager1" />

<telerik:RadFormDecorator ID="QsfFromDecorator" runat="server" DecoratedControls="All" EnableRoundedCorners="false" />

<div class="qsf-demo-canvas">

<telerik:RadRibbonBar runat="server" ID="RadRibbonBar1" Skin="Windows7" Width="860px">

<Tabs>

<telerik:RibbonBarTab Text="Taxonomies" ToolTip="Taxonomies">

<telerik:RibbonBarGroup Text="Taxonomies">

<Items>

<telerik:RibbonBarSplitButton Text="Test">

<Buttons>

<telerik:RibbonBarButton Text="Test1"/>

<telerik:RibbonBarButton Text="Test2"/>

</Buttons>

</telerik:RibbonBarSplitButton>

<telerik:RibbonBarButton Text="Open" Value="Open">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Close" Value="Close">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Edit" Value="Edit">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Copy" Value="Copy">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Paste" Value="Paste">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print" Value="Print">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print Preview" Value="Print Preview">

</telerik:RibbonBarButton

</Items>

</telerik:RibbonBarGroup>

</telerik:RibbonBarTab>

<telerik:RibbonBarTab Text="Collections" ToolTip="Collections">

<telerik:RibbonBarGroup Text="Collections">

<Items>

<telerik:RibbonBarButton Text="Open" Value="Open">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Close" Value="Close">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Edit" Value="Edit">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Copy" Value="Copy">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Paste" Value="Paste">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print" Value="Print">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print Preview" Value="Print Preview">

</telerik:RibbonBarButton

</Items>

</telerik:RibbonBarGroup>

</telerik:RibbonBarTab>

<telerik:RibbonBarTab Text="Indexes" ToolTip="Indexes">

<telerik:RibbonBarGroup Text="Indexes">

<Items>

<telerik:RibbonBarButton Text="Open" Value="Open">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Close" Value="Close">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Edit" Value="Edit">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Copy" Value="Copy">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Paste" Value="Paste">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print" Value="Print">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print Preview" Value="Print Preview">

</telerik:RibbonBarButton

</Items>

</telerik:RibbonBarGroup>

</telerik:RibbonBarTab>

<telerik:RibbonBarTab Text="Research Reviews" ToolTip="Research Reviews">

<telerik:RibbonBarGroup Text="Research Reviews">

<Items>

<telerik:RibbonBarButton Text="Open" Value="Open">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Close" Value="Close">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Edit" Value="Edit">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Copy" Value="Copy">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Paste" Value="Paste">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print" Value="Print">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print Preview" Value="Print Preview">

</telerik:RibbonBarButton

</Items>

</telerik:RibbonBarGroup>

</telerik:RibbonBarTab>

<telerik:RibbonBarTab Text="Audit" ToolTip="Audit">

<telerik:RibbonBarGroup Text="Audit">

<Items>

<telerik:RibbonBarButton Text="Open" Value="Open">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Close" Value="Close">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Edit" Value="Edit">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Copy" Value="Copy">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Paste" Value="Paste">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print" Value="Print">

</telerik:RibbonBarButton>

<telerik:RibbonBarButton Text="Print Preview" Value="Print Preview">

</telerik:RibbonBarButton

</Items>

</telerik:RibbonBarGroup>

</telerik:RibbonBarTab>

</Tabs>

</telerik:RadRibbonBar>

</div>

</form>

<form id="form2" runat="server">

<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" Skin="Silk" EnableRoundedCorners="False" DecoratedControls="All" />

<telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" UpdateInitiatorPanelsOnly="true">

<AjaxSettings>

<telerik:AjaxSetting AjaxControlID="RadGrid1">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />

<telerik:AjaxUpdatedControl ControlID="SortLabel" />

</UpdatedControls>

</telerik:AjaxSetting>

<telerik:AjaxSetting AjaxControlID="ConfiguratorPanel">

<UpdatedControls>

<telerik:AjaxUpdatedControl ControlID="RadGrid1" LoadingPanelID="RadAjaxLoadingPanel1" />

</UpdatedControls>

</telerik:AjaxSetting>

</AjaxSettings>

</telerik:RadAjaxManager>

<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

</telerik:RadAjaxLoadingPanel>

<telerik:RadGrid ID="radGrid1" runat="server" AllowPaging="true"

AllowSorting="True" GridLines="None">

<MasterTableView AllowMultiColumnSorting="true">

<PagerStyle AlwaysVisible="true" />

</MasterTableView>

<SortingSettings SortedBackColor="#FFF6D6" EnableSkinSortStyles="false"></SortingSettings>

<HeaderStyle Width="100px"></HeaderStyle>

</telerik:RadGrid>

</form>

</body>

</html>

This is my Code Behind file

Imports Microsoft.VisualBasic

Imports Telerik.Web.UI

Partial Class PamTest

Inherits System.Web.UI.Page

Public Sub New()

Dim data As New List(Of MyData)

data.Add(New MyData With {.MyColumn1 = "aa", .MyColumn2 = "dd", .MyColumn3 = "rr"})

data.Add(New MyData With {.MyColumn1 = "bb", .MyColumn2 = "yy", .MyColumn3 = "ff"})

data.Add(New MyData With {.MyColumn1 = "cc", .MyColumn2 = "xx", .MyColumn3 = "dd"})

radGrid1.DataSource = data

End Sub

End Class

Class MyData

Public Property MyColumn1 As Object

Public Property MyColumn2 As Object

Public Property MyColumn3 As Object

End Class

My problem is that

radGrid1.DataSource = data

Is giving an unknown entity error and I have no idea why

Thanks

1 Answer, 1 is accepted

answered on 23 May 2014, 06:09 AM

Hello Pamela,

The problem in the illustrated setup is that the properties in the class(MyData) are of type Object. By default RadGrid will only fetch the bindable property types. Since Object is not one of them the control has no way of knowing which values should be displayed.

In order to resolve the problem you can modify the class definition as demonstrated below.

VB:

Class MyData

Public Property MyColumn1 As String

Public Property MyColumn2 As String

Public Property MyColumn3 As String

End Class

Regards,
Angel Petrov
Telerik

Check out the Telerik Platform - the only platform that combines a rich set of UI tools with powerful cloud services to develop web, hybrid and native mobile apps.