listview.ItemsSource = observableCollection ques

  • Thread starter Thread starter mp
  • Start date Start date
M

mp

Hi
trying to populate a list view with data from objects contained in
collection
I'm getting the class name showing up in the listview not the values of each
property as i expected
what am i missing?

foreach loop populates collection
{...
myFuncs.Add(new FunctionInfo(FuncName, Signature, Foundin));


}

after for loop is done i try to fill listview with 3 columns with data from
3 properties of each obj in collection

lv1.Listview1.ItemsSource = myFuncs;

listview is filled but all entries in all collumns is classname
"WpfApplication1.FunctionInfo"

how do i get the values of the properties instead?

....the objects are defined thusly

myFuncs and FunctionInfo defined in FuntionList.cs

public class FunctionInfo

{

private String _Name;

private string _Signature;

private string _FileName;


public FunctionInfo(String name, string signature, string filename)

{this.Name = name;

this.Signature = signature;

this.FileName = filename;

}

public string Name

{

get { return _Name; }set { _Name = value; }}

public string Signature{get { return _Signature ; }set { _Signature =
value; }}

public string FileName{get { return _FileName; }set { _FileName = value; }}}

public class FunctionList :
System.Collections.ObjectModel.ObservableCollection<FunctionInfo>

{public FunctionList(): base(){}}
 
Hi
trying to populate a list view with data from objects contained in
collection
I'm getting the class name showing up in the listview not the values of
each
property as i expected
what am i missing?
Click to expand...

The display is done using the ToString() method of each object.
Apparently, you haven't overridden that method to provide the specific
output you want. The default implementation simply returns a string
containing the name of the type of the object.

Depending on your specific needs, you may either want to override
ToString() in the object itself, or provide a wrapper object with the
necessary ToString() override that's used for the sole purpose of being
used in the ListView.

Pete
 
Peter Duniho said:
The display is done using the ToString() method of each object.
Apparently, you haven't overridden that method to provide the specific
output you want. The default implementation simply returns a string
containing the name of the type of the object.

Depending on your specific needs, you may either want to override
ToString() in the object itself, or provide a wrapper object with the
necessary ToString() override that's used for the sole purpose of being
used in the ListView.

Pete
Click to expand...

hmm I thought I'd deleted that post rather than sending...I finally
discovered I hadn't coded the xaml correctly to get the binding working...I
finally got that working..even if i barely understand how :-)
being new to c# i'm just reading and modifying numerous examples and
articles and guessing till it works <g>
I didn't override a .ToString method and will have to research exactly what
you're referring to there...
in my case i did the binding in xaml....maybe you're talking about a
codebehind method?
what i did was created a class to hold the 3 properties i wanted to display
created a resource out of that class
<Window.Resources>

<ObjectDataProvider x:Key="FunctionListDataSource"

ObjectType="{x:Type ds:FunctionList}"/>

</Window.Resources>

set the Binding source to the listview
<ListView ItemsSource="{Binding Source=

{StaticResource FunctionListDataSource}}"


and then what i was missing originally was setting each gridview column
DisplayMemberBinding
<GridViewColumn DisplayMemberBinding=

"{Binding Path=Name}"

once i got that in it worked as expected.

Thanks for the response, I'll look for that .ToString method of displaying
to compare

Thanks

mark
 
hmm I thought I'd deleted that post rather than sending...I finally
discovered I hadn't coded the xaml correctly to get the binding
working...I
finally got that working..even if i barely understand how :-)
being new to c# i'm just reading and modifying numerous examples and
articles and guessing till it works <g>
I didn't override a .ToString method and will have to research exactly
what
you're referring to there...
in my case i did the binding in xaml....maybe you're talking about a
codebehind method? [...]
Click to expand...

By default, I am always talking about C# code. This is, after all, a C#
newsgroup. :)

I understand from your post that you are coding in the WPF environment, in
which there are non-C# ways to modify presentation of your data. So in
this case, it seems that overriding ToString() is not necessary after
all. I would say that using the WPF-specific technique is probably
superior to overriding ToString(). I generally prefer data-driven
techniques over code modifications, when appropriate.

Pete
 
Peter Duniho said:
in my case i did the binding in xaml....maybe you're talking about a
codebehind method? [...]
Click to expand...

By default, I am always talking about C# code. This is, after all, a C#
newsgroup. :)
Click to expand...

thanks for the clarificaton...since i'm using c# and wpf is one option in
that ide I was thinking it was part of c# but i'm starting to get that there
are technology overlaps in this world... dot net / c# / xaml / wpf ...

thanks for your patience
mark
 
Peter Duniho said:
in my case i did the binding in xaml....maybe you're talking about a
codebehind method? [...]
Click to expand...

By default, I am always talking about C# code. This is, after all, a C#
newsgroup. :)
Click to expand...

thanks for the clarificaton...since i'm using c# and wpf is one option in
that ide I was thinking it was part of c# but i'm starting to get that
there
are technology overlaps in this world... dot net / c# / xaml / wpf ...
Click to expand...

Yes. As easy as it is to conflate them, it's important to keep in mind
the separation between C# the language, and .NET the framework. Strictly
speaking, C# doesn't require .NET, though it does require _some_ kind of
managed framework like .NET. And of course, the .NET framework can be
used from a wide variety of languages (C#, VB.NET, C++, F#, maybe some
others I'm forgetting at the moment, like Python, Ruby, etc.).

Pete
 
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