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Hidden column in Details Table value is not retrieved

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

Hash asked on 03 Jan 2017, 10:49 AM

I am trying to reterive a value of hidden column (OrderDate) in details table from back end and the value I am getting is  

Please note that I am using Telerik version 2016.1.225.45 and the below code is in my web.config

<add key="BindGridInvisibleColumns" value="true"/>

ASPX Code:

<telerik:RadGrid Skin="Office2007" ID="RadGrid1" runat="server" ShowStatusBar="true" AutoGenerateColumns="False"

PageSize="7" AllowSorting="True" AllowMultiRowSelection="False" AllowPaging="True" CellPadding="1"

OnDetailTableDataBind="RadGrid1_DetailTableDataBind" OnNeedDataSource="RadGrid1_NeedDataSource" OnItemCommand="RadGrid1_ItemCommand"

OnPreRender="RadGrid1_PreRender" Style="padding: 3px; margin: 3px;">

<HeaderStyle CssClass="RadGridHeader" />

<MasterTableView Name="master" DataKeyNames="CustomerID" AutoGenerateColumns="false" NoMasterRecordsText="No records meet the search criteria.">

<DetailTables>

<telerik:GridTableView AllowPaging="false" DataMember="OrderDrillDown" DataKeyNames="OrderID,CustomerID" runat="server"

Name="Orders" Width="100%" AllowMultiRowSelection="false" CommandItemDisplay="Top" NoDetailRecordsText="No Exclusions.">

<Columns>

<telerik:GridBoundColumn SortExpression="OrderID" HeaderText="OrderID" HeaderButtonType="TextButton"

DataField="OrderID">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn SortExpression="OrderDate" HeaderText="Date Ordered" HeaderButtonType="TextButton"

DataField="OrderDate" UniqueName="OrderDate" DataFormatString="{0:D}" Visible="false">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn SortExpression="Freight" HeaderText="Freight" HeaderButtonType="TextButton"

DataField="Freight" UniqueName="Freight">

</telerik:GridBoundColumn>

<telerik:GridButtonColumn ButtonType="LinkButton" UniqueName="Delete" Text="Delete"

CommandName="Delete">

<ItemStyle HorizontalAlign="Center" Width="10%" />

</telerik:GridButtonColumn>

</Columns>

</telerik:GridTableView>

</DetailTables>

<Columns>

<telerik:GridBoundColumn SortExpression="CustomerID" HeaderText="CustomerID" HeaderButtonType="TextButton"

DataField="CustomerID">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn SortExpression="ContactName" HeaderText="Contact Name" HeaderButtonType="TextButton"

DataField="ContactName" Visible="false">

</telerik:GridBoundColumn>

<telerik:GridBoundColumn SortExpression="CompanyName" HeaderText="Company" HeaderButtonType="TextButton"

DataField="CompanyName">

</telerik:GridBoundColumn>

<telerik:GridButtonColumn ButtonType="LinkButton" UniqueName="DeleteHac" Text="Delete"

CommandName="DeleteHac">

<ItemStyle HorizontalAlign="Center" Width="10%" />

</telerik:GridButtonColumn>

</Columns>

</MasterTableView>

<PagerStyle Mode="NextPrevAndNumeric" />

<ClientSettings EnableRowHoverStyle="True" EnablePostBackOnRowClick="false">

<Selecting AllowRowSelect="false" />

</ClientSettings>

</telerik:RadGrid>

Code behind:

protected void RadGrid1_ItemCommand(object sender, GridCommandEventArgs e)

{

GridDataItem selectedItem = (GridDataItem)e.Item;

if (e.CommandName == "Delete")

{

var check = selectedItem["OrderDate"].Text;

}

else if (e.CommandName == "DeleteHac")

{

var check1 = selectedItem["ContactName"].Text;

}

When trying to get OrderDate value I am getting   as value but I am getting the same value when the columns visiblity is set to true.

I can confirm this was working fine when the Telerik UI version was 2015.1.401.45

Also, I found a workaround for this by using Display instead of Visible, but do you think that is the only workaround or is this a known bug?

Thanks

Hazersha

3 Answers, 1 is accepted

answered on 06 Jan 2017, 09:13 AM

Hello Hash,

When a column is hidden via the Visible property it will not be rendered at all. This is why you are getting the value from the column as " ".

If you would like to hide a column in the Grid and still use the values from it you should use the Display property instead.

<telerik:GridBoundColumn SortExpression="OrderDate" HeaderText="Date Ordered" HeaderButtonType="TextButton" DataField="OrderDate" UniqueName="OrderDate" DataFormatString="{0:D}" Display="false">

Alternatively you can add the OrderDate to the DataKeyNames collection and access if via GetDataKeyValue method. Please examine the article below that illustrates the approach in more detail.

http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/rows/accessing-cells-and-rows#accessing-raw-field-data-and-key-values

Regards,
Viktor Tachev
Telerik by Progress

Try our brand new, jQuery-free Angular 2 components built from ground-up which deliver the business app essential building blocks - a grid component, data visualization (charts) and form elements.

answered on 06 Jan 2017, 09:35 AM

Many thanks for your reply.

In the above example if you see ContractName is also visible set to false, but the value for this column is retrieved correctly. I assume that we are getting values for ContractName because it is in Master Table not Details Table

Also, I have used the below code in web.config file.

<add key="BindGridInvisibleColumns" value="true"/>

Please note that this was working fine when we were using Telerik Version 2015.1.401.45 and this happens only when we upgrade it to 2016.1.225.45.

I understand we can use Display instead of Visible, but just wanted to make sure that retrieving invisible columns value from the Details table in RadGrid was removed or a bug in latest Telerik version?

Thanks

Hazersha