SL3, RIA, and vanliia Textbox Binding?

4 replies. Latest Post by pattormey on November 7, 2009.

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pattormey

Member

35 points

18 Posts

SL3, RIA, and vanliia Textbox Binding?

11-07-2009 3:33 PM |

New to SL...

I'm trying to use RIA DomainDataSource without using the RIA DataFrorm. I want explicit control of the UI

But when I Bind to a vanilla SL3 TextBox

<StackPanel DataContext="{Binding Data, ElementName=ddsCities}"

<TextBox x:Name="txtName"
Text="{Binding Name, Mode=OneWay}"
/>

</StackPanel>

I get (Below) in the Immediate Windows But it still works!

System.Windows.Data Error: BindingExpression path error: 'Name' property not found on 'System.Windows.Data.EntityCollectionView' 'System.Windows.Data.EntityCollectionView' (HashCode=48630964). BindingExpression: Path='Name' DataItem='System.Windows.Data.EntityCollectionView' (HashCode=48630964); target element is 'System.Windows.Controls.TextBox' (Name='txtName'); target property is 'Text' (type 'System.String')..

Any Idea of where I should look to Understand this

Thanks

Pat Tormey PE
MS MVP
New Hampshire USA
PTormey@4square.net

Fredrik N

Participant

1126 points

228 Posts

Re: SL3, RIA, and vanliia Textbox Binding?

11-07-2009 4:50 PM |

What kind of object will your ddsCities return (the method you specify as QueryName)? If it will return a single object with a property "Name", you shouldn't get any error. In your case it looks like it returns an EntityCollectionView.

/Fredrik Normén - fredrikn @ twitter

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pattormey

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Re: SL3, RIA, and vanliia Textbox Binding?

11-07-2009 5:23 PM |

Hi Fredrik,
thanks!

It's returning a POCO List..

Just full of play time data

It does work.. It's the messages in the Immediate Window that confuse me..

Any help would be appreciated

I'm followling the demo in the July 09 RIA Services DPF download.microsoft.com

[EnableClientAccess()]

public class CityService : DomainService
{
private CityData _cityData = new CityData();
public IEnumerable<City> GetCities()
{ return _cityData.Cities;}
}

public class CityData
{
private List<City> _cities = new List<City>();
public IList<City> Cities
{
get
{
LoadCities(); //loads the junk data
return this._cities;
}
}}

Pat Tormey PE
MS MVP
New Hampshire USA
PTormey@4square.net

Fredrik N

Participant

1126 points

228 Posts

Re: SL3, RIA, and vanliia Textbox Binding?

11-07-2009 5:36 PM |

I tried your example and I didn't get the error in the im. window. Here is my example code:

    <riaControls:DomainDataSource x:Name="ddsCities" QueryName="GetCities">
        <riaControls:DomainDataSource.DomainContext>
            <dc:MyDomainContext/>
        </riaControls:DomainDataSource.DomainContext>
    </riaControls:DomainDataSource>

[EnableClientAccess()]
    public class MyDomainService : DomainService
    {
        public IEnumerable<City> GetCities()
        {
            return new List<City>()
                        {
                            new City() { ID = 0, Name = "New York" },
                            new City() { ID = 1, Name = "Stockholm" }
                        };
        }
    }

    public class City
    {
        [Key]
        public int ID { get; set; }

public string Name { get; set; }
}

/Fredrik Normén - fredrikn @ twitter

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pattormey

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18 Posts