Questions on UI for ASP.NET AJAX Forum

4 answers

259 views

RadGrid Filter column getting Null Reference Error

We have a RadGrid with multiple columns. Two of the columns are Bound to some Lazy Loaded properties.

The first looks like this:

<telerik:GridBoundColumn DataField="Contact.FullName" DataType="System.String" FilterControlAltText="Filter Portfolio Manager column" HeaderText="Portfolio Manager" HeaderButtonType="TextButton" SortExpression="PortfolioManager" UniqueName="PortfolioManager" FilterControlWidth="60%">

<HeaderStyle CssClass="GridHeaderControlColor" Width="25%" />

</telerik:GridBoundColumn>

The other looks like this:

<telerik:GridBoundColumn DataField="Contact1.Fullname" FilterControlAltText="Filter Compliance Officer column" SortExpression="ComplianceOfficer" HeaderText="Compliance Officer" HeaderButtonType="TextButton" UniqueName="ComplianceOfficer" DataType="System.String" FilterControlWidth="60%">

<HeaderStyle CssClass="GridHeaderControlColor" Width="20%" />

</telerik:GridBoundColumn>

They are bound to different columns obviously but both are lazy loaded from the Contact table.

The first one (Portfolio Manager) Filters fine.

The second (Compliance Officer), when you Filter we get errors about Null Reference.
The error does not trigger any stoppage in Debug mode, it just goes straight back to the page and the Stack Trace doesn't touch any of our code.

I THINK the issue is that the second column can have NULLs, but I have no idea how to handle Null values on Lazy Loaded Bound objects.

Here is the Stacktrace:

[NullReferenceException: Object reference not set to an instance of an object.]

lambda_method(Closure , PMD_ComplianceLoanAdminReport ) +62

System.Linq.WhereEnumerableIterator`1.MoveNext() +141

System.Linq.Enumerable.Count(IEnumerable`1 source) +225

lambda_method(Closure ) +149

System.Linq.EnumerableExecutor`1.Execute() +94

System.Linq.EnumerableExecutor`1.ExecuteBoxed() +23

System.Linq.EnumerableQuery`1.System.Linq.IQueryProvider.Execute(Expression expression) +94

Telerik.Web.UI.GridDynamicQueryable.Count(IQueryable source) +296

Telerik.Web.UI.GridDataTableFromEnumerable.FillData35() +4216

Telerik.Web.UI.GridDataTableFromEnumerable.FillData() +1064

Telerik.Web.UI.GridResolveEnumerable.Initialize() +58

Telerik.Web.UI.GridResolveEnumerable.EnsureInitialized() +45

Telerik.Web.UI.GridResolveEnumerable.get_DataTable() +31

Telerik.Web.UI.GridEnumerableFromDataView..ctor(GridTableView owner, IEnumerable enumerable, Boolean CaseSensitive, Boolean autoGenerateColumns, GridColumnCollection presentColumns, String[] additionalField, Boolean retrieveAllFields) +221

Telerik.Web.UI.GridDataSourceHelper.CreateGridEnumerable(GridTableView owner, IEnumerable enumerable, Boolean caseSensitive, Boolean autoGenerateColumns, GridColumnCollection presentColumns, String[] additionalField, Boolean retrieveAllFields) +154

Telerik.Web.UI.GridDataSourceHelper.GetResolvedDataSource(GridTableView owner, Object dataSource, String dataMember, Boolean caseSensitive, Boolean autoGenerateColumns, GridColumnCollection presentColumns, String[] additionalField, Boolean retrieveAllFields) +566

Telerik.Web.UI.GridTableView.get_ResolvedDataSource() +223

Telerik.Web.UI.GridTableView.CreateControlHierarchy(Boolean useDataSource) +622

Telerik.Web.UI.GridTableView.CreateChildControls(IEnumerable dataSource, Boolean useDataSource) +800

System.Web.UI.WebControls.CompositeDataBoundControl.PerformDataBinding(IEnumerable data) +66

System.Web.UI.WebControls.DataBoundControl.OnDataSourceViewSelectCallback(IEnumerable data) +128

System.Web.UI.DataSourceView.Select(DataSourceSelectArguments arguments, DataSourceViewSelectCallback callback) +33

System.Web.UI.WebControls.DataBoundControl.PerformSelect() +143

Telerik.Web.UI.GridTableView.PerformSelect() +38

System.Web.UI.WebControls.BaseDataBoundControl.DataBind() +74

Telerik.Web.UI.GridTableView.DataBind() +363

Telerik.Web.UI.GridTableView.Rebind() +100

Telerik.Web.UI.GridFilterCommandEventArgs.ExecuteCommand(Object source) +954

Telerik.Web.UI.RadGrid.OnBubbleEvent(Object source, EventArgs e) +200

System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +37

Telerik.Web.UI.GridItem.OnBubbleEvent(Object source, EventArgs e) +66

System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +37

Telerik.Web.UI.GridItem.OnBubbleEvent(Object source, EventArgs e) +142

Telerik.Web.UI.GridItem.FireCommandEvent(String commandName, Object commandArgument) +80

Telerik.Web.UI.RadGrid.RaisePostBackEvent(String eventArgument) +9998

System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13

System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +176

System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563

Grid

answered on 06 Jul 2015

4 answers

762 views

Cannot update or uninstall Telerik WebUI VSExtensions

Every time I start VS 2010 I am prompted to update Telerik WebUI VSExtensions from 2013.2.611 to 2013.3.1022 however when I click on the Install button after the update is downloaded the install just hangs and does nothing indefinitely.

The biggest problem is that I cannot even Uninstall 2013.2.611. When I go to Installed Extensions and click on Uninstall button I am prompted with "Are you sure you want to uninstall..." but when I click on Yes absolutely nothing happens.

This is in VS 2010 both when I choose "Run as Administrator" or run it normally...

How do I fix this problem?

Installer and VS Extensions

answered on 03 Jul 2015

5 answers

97 views

Navigation buttons Ima

Hi guys.

I´m new using RadImageGallery, and I was wondering if is it possible to change the image of previous and next image in the ImageArea.

Can you please help me how to achieve this goal?.

Best regards.

Cristian.

ImageGallery

answered on 03 Jul 2015

1 answer

82 views

Improving Performance

Is there a way to minimize the ammount of requests performed by the RadGrid control? Telerik controls are performing a lot of requests for retrieving skins and JS files required by the component. Is there anything already provided by Telerik for bundling these multiple requests in perhaps two requests? One would be for a single minified JS file and the other one for all of the styles required.

1) I am using the default Skin for the RadGrid.

2) I cannot rely in caching because it's disabled in a global scope. It cannot be enabled.

3) For security policies, I cannot use Telerik CDN's.

4) I am applying the following techniques but caching. The response time is still slow. The initial call takes about 5 seconds, changing pages takes just 2 seconds (Paging made via Ajax and implementing custom pagination). The main problem is the initial rendering. The target would be 2 seconds to process the page.

http://docs.telerik.com/devtools/aspnet-ajax/general-information/performance/optimizing-performance
http://docs.telerik.com/devtools/aspnet-ajax/controls/grid/performance/grid-performance-optimizations

Does anyone have any suggestions or faced a scenario similar to the one I am describing?

Thanks in advance,
Carlos

Grid

answered on 03 Jul 2015

1 answer

367 views

RadCombobox with EnableLoadOnDemand and CheckBoxes

Hi,

Currently I am using RadCombobox with EnableLoadOnDemand="True" and CheckBoxes="True".Loading Items using OnItemsRequest Event. After postback, selected RadComboBox values are not persisting. Is it not supported in latest version also? Is there any solution for this issue in future release.

<telerik:RadComboBox ID="pCompany" Width="300px" runat="server" EnableLoadOnDemand="True"
ShowMoreResultsBox="true" EnableVirtualScrolling="true" ItemsPerRequest="10" OnItemsRequested="pCompany_ItemsRequested"
CheckBoxes="true" EnableCheckAllItemsCheckBox="true" OnSelectedIndexChanged="ppCompany_SelectedIndexChanged"
AutoPostBack="true" Height="140px">
</telerik:RadComboBox>

ComboBox

answered on 03 Jul 2015

1 answer

156 views

GridDateTimeColumn Invalid Date

I have the following Grid. The problem is I can not add a RequiredFieldValidator for the GridDateTimeColumn in edit mode, as I did for the other columns. I would like to know if it is possible, in the code behind C#, to disable the insert button (the tick sign) when the date is not valid or if I can add a validator for the date, that would not allow to insert an item if the corresponding date is not valid. I have also attached a picture.

Thank you very much for any idea, Alexandru Popa.

<telerik:RadGrid ID="rgMealPlanPrices" runat="server" AutoGenerateColumns="false"

AllowFilteringByColumn="False" AllowSorting="True" AllowPaging="True" PageSize="30"

OnNeedDataSource="rgMealPlanPrices_NeedDataSource"

OnDeleteCommand="rgMealPlanPrices_DeleteCommand"

OnItemDataBound="rgMealPlanPrices_ItemDataBound"

OnInsertCommand="rgMealPlanPrices_InsertCommand"

OnItemCommand="rgMealPlanPrices_ItemCommand"

OnItemCreated="rgMealPlanPrices_ItemCreated">

<MasterTableView DataKeyNames="Id" CommandItemDisplay="TopAndBottom" ShowHeadersWhenNoRecords="True"

TableLayout="Fixed" EditMode="InPlace" meta:resourcekey="rgMealPlanPricesResource">

<CommandItemSettings AddNewRecordText="Adauga" ShowRefreshButton="False" ExportToPdfText="Export to PDF" />

<RowIndicatorColumn Visible="False">

<HeaderStyle Width="20px"></HeaderStyle>

</RowIndicatorColumn>

<ExpandCollapseColumn Visible="False">

<HeaderStyle Width="19px"></HeaderStyle>

</ExpandCollapseColumn>

<Columns>

<telerik:GridEditCommandColumn ButtonType="ImageButton" UniqueName="EditCommandColumn" HeaderStyle-Width="30px">

</telerik:GridEditCommandColumn>

<telerik:GridBoundColumn DataField="Id" HeaderText="Id" ReadOnly="true" UniqueName="Id"

ForceExtractValue="Always" ConvertEmptyStringToNull="true" Display="False" />

<telerik:GridBoundColumn DataField="Code" HeaderText="Cod" meta:resourcekey="MealPlanCodeResource" Display="False" UniqueName="MealPlanCode">

</telerik:GridBoundColumn>

<telerik:GridTemplateColumn DataField="MealPlan" HeaderText="Regim de masa" UniqueName="MealPlanName" meta:resourcekey="MealPlanResource">

<EditItemTemplate>

<telerik:RadComboBox ID="rcbMealPlan" runat="server" AppendDataBoundItems="True"

DataTextField="DisplayName" DataValueField="Id" Filter="Contains" MarkFirstMatch="true"

DropDownWidth="240" EmptyMessage="Search by name" meta:resourcekey="rcbMealPlanResource" Width="240">

</telerik:RadComboBox>

<asp:RequiredFieldValidator ID="rfvMealPlan" runat="server" ControlToValidate="rcbMealPlan" EnableClientScript="true" SetFocusOnError="true"

meta:resourcekey="rfvMealPlanResource">

</asp:RequiredFieldValidator>

</EditItemTemplate>

<ItemTemplate>

<%# Eval("DisplayName") %>

</ItemTemplate>

</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn DataField="MealPlanPrice" HeaderText="Pret" UniqueName="MealPlanName" meta:resourcekey="MealPlanPriceResource">

<EditItemTemplate>

<telerik:RadNumericTextBox ID="txtPrice" runat="server" DataType="System.Decimal" Width="50px">

<NumberFormat DecimalDigits="2" DecimalSeparator="." GroupSeparator="" KeepNotRoundedValue="true" AllowRounding="false" />

</telerik:RadNumericTextBox>

<asp:RequiredFieldValidator ID="rfvPrice" runat="server" ControlToValidate="txtPrice" EnableClientScript="true" SetFocusOnError="true"

meta:resourcekey="rfvMealPlanResource" />

</EditItemTemplate>

<ItemTemplate>

<%# Eval("Price") %>

</ItemTemplate>

<HeaderStyle Width="80px" />

</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn DataField="MealPlanCalories" HeaderText="Calorii" UniqueName="MealPlanCalories" meta:resourcekey="MealPlanCaloriesResource">

<EditItemTemplate>

<telerik:RadNumericTextBox ID="txtCalories" runat="server" DataType="System.Decimal" Width="50px">

<NumberFormat DecimalDigits="0" DecimalSeparator="." GroupSeparator="" KeepNotRoundedValue="true" AllowRounding="false" />

</telerik:RadNumericTextBox>

<asp:RequiredFieldValidator ID="rfvCalories" runat="server" ControlToValidate="txtCalories" EnableClientScript="true" SetFocusOnError="true"

meta:resourcekey="rfvMealPlanResource" />

</EditItemTemplate>

<ItemTemplate>

<%# Eval("Calories") %>

</ItemTemplate>

<HeaderStyle Width="180px" />

</telerik:GridTemplateColumn>

<telerik:GridTemplateColumn DataField="MealPlanConfortSporit" HeaderText="ConfortSporit" UniqueName="MealPlanConfortSporit">

<EditItemTemplate>

<asp:CheckBox ID="ckbConfortSporit" runat="server" ></asp:CheckBox>

</EditItemTemplate>

<ItemTemplate>

<%# Eval("ConfortSporit") %>

</ItemTemplate>

<HeaderStyle Width="180px" />

</telerik:GridTemplateColumn>

<telerik:GridDateTimeColumn DataField="IssueDate" HeaderText="Valid de la" HeaderStyle-Wrap="true" DataFormatString="{0:dd.MM.yyyy}"

meta:resourcekey="ValidFromResource" PickerType="DatePicker" Resizable="true">

<HeaderStyle Width="80px" />

</telerik:GridDateTimeColumn>

<telerik:GridButtonColumn ConfirmText="Delete this meal plan?" ConfirmDialogType="RadWindow" ConfirmDialogHeight="110px"

ConfirmTitle="Delete" ButtonType="ImageButton" Text="Delete" CommandName="Delete" meta:resourcekey="DeleteCommandResource"

ImageUrl="~\Image\icon\16x16_Microsoft_Style\delete_16_OLD.gif" UniqueName="DeleteServiceColumn">

<HeaderStyle Width="40px" />

</telerik:GridButtonColumn>

</Columns>

</MasterTableView>

</telerik:RadGrid>

Grid

answered on 03 Jul 2015

3 answers

76 views

RadGantt - Is break possible for displaying very long duration, horizontal scroll is annoying

Is there any way to show a break while we have a very long duration to show in RadGantt?

For eg: when we have 25 years to show in Gantt, is there a way I can just show the first year and the last year with a break indication in between the duration Gantt line?

Gantt

answered on 03 Jul 2015

3 answers

121 views

Overflowing one grid column

I have a RadGrid in my .aspx file. The second to last column is GridDateTimeColumn:<telerik:GridDateTimeColumn DataField="IssueDate" HeaderText="ValidFrom"
HeaderStyle-Wrap="true" DataFormatString="{0:dd.MM.yyyy}"
meta:resourcekey="ValidFromResource" PickerType="DatePicker" Resizable="true">
<HeaderStyle Width="80px" />
</telerik:GridDateTimeColumn>
and the last column is a GridButtonColumn. In Edit mode (InPlace), the GridDateTimeColumn becomes a RadDatePicker. However, it can't fit in the 80px of the column (only a part of the textbox is visible, and the calendar not at all). I want the RadTimePicker to overflow over the GridButtonColumn Column (which doesn't appear in edit mode). I want to do that either in the .aspx file (if possible) or in the radGrid_ItemDataBound event.Any idea is appreciated. Thank you :)

Grid

answered on 03 Jul 2015

3 answers

72 views

Updating masterpage from any button included in content page

Hello,

I'm using AjaxManager in my MasterPage, and AjaxManagerProxy inside my content pages.

I would like to update a label (error or success result) included into my masterpage after clicking any button included inside content pages ajaxified.

But why ajaxify all buttons because each postback done must imperatively refreshing my masterpage label...

I think i can not write dynamically an ajaxsettings with an unknown AjaxifiedControlID, doesn't it ?

Thank you.

Ajax

answered on 03 Jul 2015

12 answers

2.0K+ views

How to reset RadComboBox with Checkboxes using Javascript

I am hoping this is a fairly easy one - but have not found any documentation on it.

I have several ComboBoxes on a page that use the new(ish) checkbox feature for each item. When the user clicks a Clear button, I would like to uncheck any checked items in each Combobox, and if necessary, reset to the EmptyMessage. This does not seem to work:

function clearFilters(sender, args) {

var combo = $find("<%= RadComboBox1.ClientID %>");

combo.clearItems;

combo.clearSelection;

}

ComboBox

answered on 03 Jul 2015