ComboBoxExt + GridListControl + Bind

[Administrator]

Hello

I have some difficulties to bind a gridlistcontrol to a dataset.... :

i have a comboboxExt combine with a GridListControl. The GLC has a datasource, displaymember and value member correct. The selectedValue is bond with value in the dataset

my problem is that the combo does not show the correct value (it shows the first element of the GLC)
and when I select a new value, the databind is not update
conclusion : The bind doesn't work....
WHY?????
Where is the mistake?

Thanks a lot...

lobrys

[Administrator]

Make sure the comboboxext and gridlistcontrol are both using the same BindingContext. If they are using different contexts, the positions will not sync up. Maybe try code like,

this.comboBoxExt1.BindingContext = this.BindingContext;
this.gridListControl1.BindingContext = this.BindingContext;

This will set both contexts equal to your form's BindingContext.

[Administrator]

Thanks for your answer...
I dont understand...I doesn't work...
Here is my code:

Me.GridListControl1.DataBindings.Add("SelectedValue", ds, "table1.id")

ComboBoxExt1.ListControl = GridListControl1

GridListControl1.DataSource = GET_TABLE("SOMETHING")
GridListControl1.DisplayMember = "lib"
GridListControl1.ValueMember = "id"
        
ComboBoxExt1.BindingContext = Me.BindingContext
GridListControl1.BindingContext = Me.BindingContext

Me.BindingContext(ds, "table1").Current

is at the good value first...and never change...

help me pleazzz...

lobrys

[Administrator]

Can you try and if it works with a regular Windows Forms Listbox?

Or is it just the GridListControl where it does not work?

Stefan

[Administrator]

Try commenting out your code:

Me.GridListControl1.DataBindings.Add("SelectedValue", ds, "table1.id")

When you set the DataSource and ValueMember, this automatically binds the SelectedValue.

If that does not work, if you can attach a sample shwoingthe problem we can look into it. Or, you can submit a Direct Trac support incident with a project.

[Administrator]

Hello again....
first, thanks All for everything...

secondly, I can't make my project work
here is a sample project with my problem

the aim is to print in a comboboxExt the name of the father of a person X
the person X is located in a Dataset, table="tab_ds", row=0

the comboBoxExt works with a GridListControl which contains the list of All the persons...

I must be able to change the father of the person X by changing in the gridlistcontrol

I wish it is understandable....
(excuse me for my poor english)

Thanks all....

Lobrys

[Administrator]

I think you can get this to work by removing

Me.GridListControl1.DataBindings.Add("SelectedValue", ds, "tab_ds.father") 

and instead listen to the ComboBoxExt1_SelectionChangeCommitted event and explicitly set the value there. Here is your sample back with the changes. I also added a couple of dataGrids just to see the raw datatables as you change the combobox.

[Administrator]

Thanks a lot Clay!
It's working perfectly....

now, i am converting this in a usercontrol, and everything will be OK....

Thanks again!

Lobrys

[Tim Lloyd]

Is it possible to enable strict autocompletion behaviour with a gridlistcontrol/comboboxext combination so that only values that are in the gridlistcontrol can be entered into the combobox.

With this example it is possible to enter a value that is not consistant with the list.

Many Thanks, Tim.

[Administrator]

For a GridListControl celltype in a grid cell, if you set the GridStyleInfo.DropDownStyle to AutoComplete, then you get autocomplete and you can only type entries from the droplist.

For a ComboBoxExt, this behavior is not supported. But if you set the ComboBoxExt1.DropDownStyle = ComboBoxStyle.DropDownList, then you are restricted to values in the list, but typing only matches the first character which is the standard ComboBoxStyle.DropDownList behavior.

[Tim Lloyd]

Clay,

I was looking for the behaviour which I get using a gridlistcontrol as a dropdown in a grid.

I would like this behaviour in a stand-alone combobox type control. Any plans to support this feature?

Tim.

[Administrator]

We do have this as a feature request, but it has not made the upcoming 2.0 release. So, it will be at least the 2.1 time frame before it could be added.

[Tim Lloyd]

Many thanks for the update.