Bind Property of Child-Objecty to DataGridView

[Pieter]

Hi,

I want to bind a proeprty of a child object to a DataGridView, but it
doesn't work.

For instance:
Imagen that I have an object Company, and this object company has a child
object Address.
Address has a property Street.

Now I want to bind a list oc Company objects to my DataGridView, and show
there Street proeprty.
So you would think you would have to add Address.Street as DataPropertyNam e
in the DataGridViewTex tBoxColumn, but this doesn't show the value...

Does anybody knows how to do this?
Thansk a lot in advance,
Pieter

[Rick]

AFAIK a datagridview cannot bind to child properties.

Rick

"Pieter" <pi************ ****@hotmail.co mwrote in message
news:uj******** ******@TK2MSFTN GP06.phx.gbl...

Hi,

I want to bind a proeprty of a child object to a DataGridView, but it
doesn't work.

For instance:
Imagen that I have an object Company, and this object company has a child
object Address.
Address has a property Street.

Now I want to bind a list oc Company objects to my DataGridView, and show
there Street proeprty.
So you would think you would have to add Address.Street as
DataPropertyNam e in the DataGridViewTex tBoxColumn, but this doesn't show
the value...

Does anybody knows how to do this?
Thansk a lot in advance,
Pieter

[Duy Lam]

Pieter wrote:

Hi,

I want to bind a proeprty of a child object to a DataGridView, but it
doesn't work.

For instance:
Imagen that I have an object Company, and this object company has a child
object Address.
Address has a property Street.

Now I want to bind a list oc Company objects to my DataGridView, and show
there Street proeprty.
So you would think you would have to add Address.Street as DataPropertyNam e
in the DataGridViewTex tBoxColumn, but this doesn't show the value...

Does anybody knows how to do this?
Thansk a lot in advance,
Pieter

Hi, I think you can bind child property in this view but I don't know
how to edit these property (in your problem)
This is the way: use Repeater (or DataList) and template
In your Visual Studo, open web page containning DataGridView (in Code
mode - not Design mode). May be your code like this

<asp:Repeater Id="companyGrid View"
OnItemDataBound ="companyGridVi ew_ItemDataBoun d">
<HeaderTemplate ><table><tr><td >Company</td></tr></HeaderTemplate>
<FooterTemplate ></table></FooterTemplate>
<ItemTemplate >
<tr><td><asp:La bel Text="<%# Eval("CompanyNa me") %>">
<asp:Repeater Id="addressGrid View">
<HeaderTemplate ><table><tr><td >Address</td></tr></HeaderTemplate>
<FooterTemplate ></table></FooterTemplate>
<ItemTemplate >
<tr><td><asp:La bel Text="<%# Eval("CompanyAd dress") %>">
</td></tr>
</ItemTemplate>
</asp:Repeater>
</td></tr>
</ItemTemplate>
</asp:Repeater>
In your code behind:

protected void companyGridView _ItemDataBound( object sender,
RepeaterItemEve ntArgs e) {
if( e.Item.ItemType == ItemType.Item || e.Item.ItemType ==
ItemType.Altern atingItem) {
Company boundObj = e.Item.DataItem as Company; // your Company
object which is binding
Repeater rpt = e.Item.FindCont rol("addressGri dView") as Repeater; //
ger reference
rpt.DataSource = Companay.Addres s; // Address must be a boundable
object (sorry if I don't use this term exactly) (IList, IEnumberable,
DataTable, ..)
rpt.DataBind();
}
}

The important thing is ItemDataBound event, you registter that event and
do anything you want

[Marc Gravell]

The "DataGridViewTe xtBoxColumn" (and the "windowsfor ms" group in the
cross-post) indicates that this is windows-forms, not asp.net, but
this is an easy mistake to make when it isn't clear.

For the OP's benefit - if you limit yourself to a single appropriate
group (such as windowsforms) then this type of mixup is avoided. For
future questions, you might want to consider
microsoft.publi c.dotnet.framew ork.windowsform s.databinding.

DataGridView (winform) only supports direct properties for columns.
Adding a facade method could be an option if you own the class. If
not, there are some other (more complex) tricks you can use to provide
a runtime shadow property. Let me know if you need this, but note that
a facade method is preferable for simplicity, i.e.

public string EmployeeName { // facade to Employee.Name
get {return Employee.Name;}
set {Employee.Name = value;}
}

Marc

[Duy Lam]

Marc Gravell wrote:

The "DataGridViewTe xtBoxColumn" (and the "windowsfor ms" group in the
cross-post) indicates that this is windows-forms, not asp.net, but
this is an easy mistake to make when it isn't clear.

For the OP's benefit - if you limit yourself to a single appropriate
group (such as windowsforms) then this type of mixup is avoided. For
future questions, you might want to consider
microsoft.publi c.dotnet.framew ork.windowsform s.databinding.

DataGridView (winform) only supports direct properties for columns.
Adding a facade method could be an option if you own the class. If
not, there are some other (more complex) tricks you can use to provide
a runtime shadow property. Let me know if you need this, but note that
a facade method is preferable for simplicity, i.e.

public string EmployeeName { // facade to Employee.Name
get {return Employee.Name;}
set {Employee.Name = value;}
}

Marc

Oh, I'm sorry :)

--
Duy Lam Phuong