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

No data display with ShowHeadersWhenNoRecords="False" and GridClientDeleteColumn

11 Answers 188 Views

Grid

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

11 Answers, 1 is accepted

answered on 12 Mar 2009, 10:23 AM

Just because I'm curious - is the telerik-points system still active?
I remeber in the last years customers got some if they find something - my last have been assigned in december.

By the way - I made a simple work around for this - bind to the DataBound event of the grid and do something like this:

    
                protected void rgCartLines_DataBound(object sender, EventArgs e) {  
        
                        if (rgCartLines.MasterTableView.DataKeyValues.Count <1) {  
        
                            rgCartLines.ShowFooter = false;  
        
                            rgCartLines.ShowHeader = false;  
        
                        }  
        
                    }

rgCartLine of course is the id of the grid :)

Regards

Manfred

answered on 09 Jul 2020, 01:27 PM

beforecollapse.png

aftercollapse.png

uncollapsedc22635f24fc94e37a358ea611e204650.png

Has this been addressed yet? I have a same issue where the NoRecordsTemplate shows. There are a few things to point out here. Its not really the template that is the issue, it seems its the logic behind showing "NoDetailRecordsText" and "NoMasterRecordsText" for the grid.

If i set both properties ie: NoDetailRecordsText="No details" NoMasterRecordsText="No master" and using NeedDataSource for my binding and GroupExpressions. This is the oddity, the "NoMasterRecords" and "NoDetailRecordsText" DO NOT show when i have data, which is good. I can not see it at the bottom of the data. However, if i use the collapse arrow on the Group, it appears at the bottom of the collapsed Group. Once I open it back up, it is there now at the bottom. This is all Client side, no postbacks. The NoRecordsTemplate works the same way. I see if AFTER i open back up the collapse. No scrolls, i have this at 100% height

<telerik:RadGrid runat="server" ID="RadGridAttendees" ShowHeader="true" ShowFooter="True" AutoGenerateColumns="false"

EnableGroupsExpandAll="true" AllowSorting="true" AllowAutomaticUpdates="true" RenderMode="Lightweight">

<ExportSettings OpenInNewWindow="true" IgnorePaging="true" ExportOnlyData="true" FileName="Event Attendees" UseItemStyles="false">

<Csv ColumnDelimiter="Comma" FileExtension=".csv" RowDelimiter="NewLine" />

<Pdf PageBottomMargin="6.35" PageTopMargin="6.35" PageLeftMargin="6.35" PageRightMargin="6.35" ForceTextWrap="false" DefaultFontFamily="Arial Unicode MS" />

</ExportSettings>

<HeaderContextMenu EnableTheming="True">

<CollapseAnimation Duration="400" Type="OutCubic" />

</HeaderContextMenu>

<ClientSettings AllowExpandCollapse="true" AllowGroupExpandCollapse="true" EnableAlternatingItems="false">

<Selecting CellSelectionMode="SingleCell" />

<Scrolling AllowScroll="true" UseStaticHeaders="true" />

<ClientEvents OnHeaderMenuShowing="OnHeaderMenuShowing" OnCellSelected="OnCellSelected" OnBatchEditOpening="OnBatchEditOpening" OnBatchEditCellValueChanging="OnBatchEditCellValueChanging" OnGroupExpanded="ExpandResize" OnHierarchyExpanded="ExpandResize" />

</ClientSettings>

<GroupingSettings RetainGroupFootersVisibility="true" GroupByFieldsSeparator="" CaseSensitive="false" />

<MasterTableView runat="server" DataKeyNames="FamilyId, MemberId, EventNoteId, GroupName, NotAttending, Attending, IsPrimary, IsParent, IsChild, Questions" AllowSorting="true" EnableHeaderContextMenu="true" CommandItemDisplay="Top" GroupLoadMode="Client"

ShowGroupFooter="true" ClientDataKeyNames="FamilyId, MemberId, EventNoteId, EventMasterId, EventSubId, GroupName"

EditMode="Batch" NoDetailRecordsText="No details" NoMasterRecordsText="No master">

<CommandItemSettings ShowAddNewRecordButton="false" ShowExportToCsvButton="true" ShowExportToExcelButton="true" ShowExportToPdfButton="true" ShowExportToWordButton="true"

SaveChangesText="Save Event Notes Changes" CancelChangesText="Cancel Event Note Changes" ShowRefreshButton="false" />

<BatchEditingSettings EditType="Cell" />

<GroupByExpressions>

<telerik:GridGroupByExpression>

<GroupByFields>

<telerik:GridGroupByField FieldName="EventSubId" />

<telerik:GridGroupByField FieldName="GroupLevel" />

</GroupByFields>

<SelectFields>

<telerik:GridGroupByField FieldName="EventSubName" HeaderText=" " HeaderValueSeparator=" " />

<telerik:GridGroupByField FieldName="GroupName" HeaderText=" for Tribe: " HeaderValueSeparator=" " />

</SelectFields>

</telerik:GridGroupByExpression>

</GroupByExpressions>

<Columns>

answered on 20 Jun 2021, 06:54 PM

Hi,

I am using ShowHeadersWhenNoRecords="False" and in my pageLoad my RadGrid.Datasource is New object[]{} to display noRecordsTemplate. When I press a button, I am setting the RadGrid.Datasource with null then call Rebind() to call needDataSource but the records are not displayed neither the Headers in the UI. Whats the problem?

PD. The radgrid is not using DataSourceID. Only NeedDataSource which validates if my static object list contains more than zero then sets my list as radgrid.datasource

answered on 23 Jun 2021, 02:28 PM

Hello Franz,

Binding RadGrid correctly is essential. If not doing that, you might experience problems similar to what you have described.

1. Simple data-binding (Not recommended)

This is only working for displaying data in the Grid. Functionalities not supported by it are:

Inserting, deleting, and updating records through custom edit forms (WebUserControl or FormTemplate)
Grouping
Hierarchy relations
Filtering
Sorting
Paging

Binding in the Page Load

protected void Page_Load(object sender, EventArgs e)
{
    if (!IsPostBack)
    {
        RadGrid1.DataSource = new DataTable();
        RadGrid1.DataBind();
    }
}

Binding In a button click

protected void RadButton1_Click(object sender, EventArgs e)
{
    RadGrid1.DataSource = new DataTable();
    RadGrid1.DataBind();
}

2. Using the NeedDataSource Event (Recommended)

This binding technique supports all functionalities, but there is a rule to it: Never call the DataBind() method. If you need to refresh the Grid, use the Rebind() instead.

Binding data in the NeedDataSource event. Note that DataBind() and Rebind() method will both make the Grid fire the NeedDataSource event, and so, calling any of these methods in this event will cause an infinite loop crashing the application. Try to avoid that.

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    (sender as RadGrid).DataSource = new DataTable();
}

Binding/changing data on a Button Click. Assign the new data source and refresh the Grid.

protected void RadButton1_Click(object sender, EventArgs e)
{
    RadGrid1.DataSource = new DataTable();
    RadGrid1.Rebind();
}

I suggest that you Go with Option 2. I would recommend that technique over anything, even if you are only displaying data.

Here is an example with the ShowHeadersWhenNoRecords property enabled

<telerik:RadGrid ID="RadGrid1" runat="server" AllowPaging="True" Width="800px" OnNeedDataSource="RadGrid1_NeedDataSource">
    <MasterTableView AutoGenerateColumns="False" DataKeyNames="OrderID" ShowHeadersWhenNoRecords="true">
        <Columns>
            <telerik:GridBoundColumn DataField="OrderID" DataType="System.Int32"
                FilterControlAltText="Filter OrderID column" HeaderText="OrderID"
                ReadOnly="True" SortExpression="OrderID" UniqueName="OrderID">
            </telerik:GridBoundColumn>
            <telerik:GridDateTimeColumn DataField="OrderDate" DataType="System.DateTime"
                FilterControlAltText="Filter OrderDate column" HeaderText="OrderDate"
                SortExpression="OrderDate" UniqueName="OrderDate">
            </telerik:GridDateTimeColumn>
            <telerik:GridNumericColumn DataField="Freight" DataType="System.Decimal"
                FilterControlAltText="Filter Freight column" HeaderText="Freight"
                SortExpression="Freight" UniqueName="Freight">
            </telerik:GridNumericColumn>
            <telerik:GridBoundColumn DataField="ShipName"
                FilterControlAltText="Filter ShipName column" HeaderText="ShipName"
                SortExpression="ShipName" UniqueName="ShipName">
            </telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="ShipCountry"
                FilterControlAltText="Filter ShipCountry column" HeaderText="ShipCountry"
                SortExpression="ShipCountry" UniqueName="ShipCountry">
            </telerik:GridBoundColumn>
        </Columns>
    </MasterTableView>
</telerik:RadGrid>

Data Binding in the NeedDataSource event

protected void RadGrid1_NeedDataSource(object sender, GridNeedDataSourceEventArgs e)
{
    (sender as RadGrid).DataSource = new DataTable();
}

Result

I hope this will prove helpful.

Regards,
Attila Antal
Progress Telerik

Virtual Classroom, the free self-paced technical training that gets you up to speed with Telerik and Kendo UI products quickly just got a fresh new look + new and improved content including a brand new Blazor course! Check it out at https://learn.telerik.com/.

Product Bundles

DevCraft

Web

Mobile

Document Management

Desktop

Reporting & Mocking

Automated Testing

CMS

UI/UX Tools

Debugging

Free Tools

Support and Learning

Productivity and Design Tools

No data display with ShowHeadersWhenNoRecords="False" and GridClientDeleteColumn

11 Answers, 1 is accepted