[Solved] 500 Error - Object reference not set... - when custom binding and sending a filter...

[vladan strigo]

...so the setup is:

    <%= Html.Telerik().Grid(Model)
            .Name("Grid")
            .Columns(columns =>
                    {
                        columns.Add(o => o.Name).Width(100);
                        columns.Add(o => o.ShipAddress).Width(200);
                    })
            .Ajax(settings => settings.Action("_CustomBinding", "Grid"))
            .Pageable(settings => settings.Total((int)ViewData["total"]))
            .EnableCustomBinding(true)
            .Filterable()
            .Sortable()
    %>

it works like a charm....but as soon as you change the property name to include a number (any number, anywhere):

                        columns.Add(o => o.Name2).Width(100);
                        columns.Add(o => o.ShipAddress).Width(200);
or
                        columns.Add(o => o.N2ame).Width(100);
                        columns.Add(o => o.ShipAddress).Width(200);

I get from Ajax Object ref not set... on this line:

        public void Visit(PropertyNode propertyNode)
        {
            ((FilterDescriptor)CurrentDescriptor).Member = propertyNode.Name;
        }

in "FilterNodeVisitor". It says that the CurrentDescriptor is null?!


Any ideas?


Thnx!
Vladan

[Atanas Korchev]

Hi vladan strigo,

There seems to be a bug with properties containing numbers and filtering. To fix the problem please open
'Source\Telerik.Web.Mvc\Infrastructure\Implementation\Filtering\Parsing\FilterLexer.cs'
and replace this code fragment:

private bool TryParseIdentifier(out string identifier)
{
    SkipSeparators();

    char currentCharacter = Peek();

    if (!IsIdentifier(currentCharacter))
    {
        identifier = null;
        return false;
    }

    StringBuilder result = new StringBuilder();

    identifier = Read(character => IsIdentifier(character) || character == '.', result);

    return true;
}

private static bool IsIdentifier(char character)
{
    return char.IsLetter(character) || character == '_' || character == '$' || character == '@';
}

with this:

private bool TryParseIdentifier(out string identifier)
{
    SkipSeparators();

    char currentCharacter = Peek();
    StringBuilder result = new StringBuilder();

    if (!IsIdentifierStart(currentCharacter))
    {
        identifier = null;
        return false;
    }
    else
    {
        result.Append(currentCharacter);
        Next();
    }

    identifier = Read(character => IsIdentifierPart(character) || character == '.', result);

    return true;
}

private static bool IsIdentifierPart(char character)
{
    return char.IsLetter(character) || char.IsDigit(character) || character == '_' || character == '$';
}

private static bool IsIdentifierStart(char character)
{
    return char.IsLetter(character) || character == '_' || character == '$' || character == '@';
}

Regards,
Atanas Korchev
the Telerik team

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[max]

I'm having the same problem with the ForeignKey Colum, the the first and third combobox are empty and when I'm applying the filter throws the same error