[Solved] IntegerTextBox: Prevent the string "null" for an Model which is null

[JULIA]

Hello,

i have an EditorTemplate Integer.ascx.

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Nullable<int>>" %>

<%= Html.Telerik().IntegerTextBox()
            .Name( ViewData.TemplateInfo.GetFullHtmlFieldName( string.Empty ) )
            .InputHtmlAttributes( new { style = "width:100%" } )
            .EmptyMessage( string.Empty )
            .MinValue( int.MinValue )
            .MaxValue( int.MaxValue )
            .Value( Model )
%>

How can i prevent the string "null" for a Model which is null. The TextBox should be empty in this case.

Regards,
Timo

[Georgi Krustev]

Hi Timo,

This behavior is not expected. Please verify that the telerik.textbox.min.js or telerik.textbox.js file is loaded on the page. For more information review this help topic and examine these online examples:
http://demos.telerik.com/aspnet-mvc/grid/editingserverside
http://demos.telerik.com/aspnet-mvc/grid/editingajax

Best wishes,
Georgi Krustev
the Telerik team

[JULIA]

Hello Georgi,

the following script is loaded.
<script type="text/javascript" src="/ProMedDoc/Scripts/2010.2.713/telerik.textbox.min.js"></script>

This is the code of the PartialView:

<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl" %>
<style type="text/css">
    .field-validation-error
    {
        position: absolute;
        display: block;
    }
    * html .field-validation-error
    {
        position: relative;
    }
    * + html .field-validation-error
    {
        position: relative;
    }
    .field-validation-error span
    {
        position: absolute;
        white-space: nowrap;
        color: red;
        padding: 17px 5px 3px;
        background: transparent url('<%= Url.Content("~/Content/Images/validation-error-message.png") %>') no-repeat 0 0;
    }
</style>
<% Html.Telerik().Grid<Promedkos.ProMedDoc.Web.UI.ViewModels.WeightViewModel>()
    .Name( "weightGrid" )
    .DataKeys( keys => keys.Add( k => k.WeightId ) )
    .DataBinding( d => d.Ajax().Select( "_Select", "Weight", new { area = "" } )
                               .Update( "_Update", "Weight", new { area = "" } )
                               .Insert( "_Update", "Weight", new { area = "" } )
                               .Delete( "_Delete", "Weight", new { area = "" } )
    )
    .ToolBar( t => t.Insert() )
    .Columns( c =>
    {
        c.Bound( p => p.Date ).Width( 100 ).Format( "{0:d}" );
        c.Bound( p => p.Value ).Width( 100 );
        c.Bound( p => p.BodyHeight ).Width( 100 );
        c.Bound( p => p.BodyArea ).Width( 150 ).Sortable( false );
        c.Command( commands =>
        {
            commands.Edit();
            commands.Delete();
        } ).Width( 120 );
    } )
    .Sortable()
    .EnableCustomBinding( true )
    .Pageable( p => p.Total( ViewData["total"] != null ? ( int )ViewData["total"] : 0 ) )
    .ClientEvents( c => c.OnError( "onError" ) )
    .Render(); %>

<script type="text/javascript">
    function onError(e) {
        if (e.textStatus == 'error')  {
            if (e.XMLHttpRequest.status == "500") {
                alert("The server was unable to process your request.\n" + e.XMLHttpRequest.responseText);
                e.preventDefault();
            }
        }
    }
</script>

<% Html.Telerik().ScriptRegistrar().Globalization( true ); %>

The EditorTemplates in your online demos are only for not nullable types.

Regards,
Timo

[Georgi Krustev]

Hello Timo,

I am still not sure where could be the problem. You can modify our editable templates to use nullable ints for example. Everything will work.

I will suggest you to send us a simple test project which reproduces the depicted issue in order to investigate it locally .

Best wishes,
Georgi Krustev
the Telerik team

[JULIA]

Hello,

i have found it! The following line is the problem:
.EmptyMessage( string.Empty )

If i replace this line with:
.EmptyMessage( " " )
everything works fine.

Will this fixed in the next release?

Regards,
Timo

[Georgi Krustev]

Hello Timo,

Unfortunately I could not reproduce the aforementioned issue. Here is a short screencast which shows that everything works on my end:
http://www.screencast.com/users/ggkrustev/folders/Jing/media/0c4f06d7-e622-41ce-8a4d-87e0eedf90f9

As you can see there is no "null" message.

Best wishes,
Georgi Krustev
the Telerik team

[JULIA]

I will open a ticket with the sample project.

[Paul]

Nevermind I have a different issue all together because the following code is throwing a Null reference exception ("Object not set to an instance of an object").

<%: Html.Telerik().NumericTextBoxFor(model => model.CardNumber) %>

The model object is not null and a few lines above I am using the built in ASP.NET MVC controls like this and it works:

<%: Html.DisplayFor(model => model.CustomerId) %>

So I might have to submit a separate question since it seems mine is a bit different than yours.

Thanks,
-Paul