Assigning datasource to combo box

[John]

Hi

I am using below code to fill the drop down list of a combo box from a table
in the dataset;

Dim dv As New DataView(ds.Companies)
Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "Company"
dv.Dispose()
dv = Nothing

Unfortunately no data turns up in combo box. What am I doing wrong?

Thanks

Regards

[Herfried K. Wagner [MVP]]

"John" <Jo**@nospam.infovis.co.ukschrieb:

I am using below code to fill the drop down list of a combo box from a
table in the dataset;

Dim dv As New DataView(ds.Companies)
Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "Company"
dv.Dispose()
dv = Nothing

Unfortunately no data turns up in combo box. What am I doing wrong?

Remove the last two lines. You must not destroy the data source as long as
the control depends on it. In addition, setting local variables to
'Nothing' is (with very few exception) not the best style.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[John]

Hi

Thanks. No luck I am afraid. I have tried all this;

Dim dv As New DataView(ds.Clients)

1. Me.txtParent.DataSource = "dv.company"

2. Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "company"

3. Me.txtParent.DataSource = ds.Clients
Me.txtParent.DataMember = "company"

Any ideas? I have tested ds.Clients.Count and it returns more than zero so
there are records in the dataset.

Thanks

Regards

"Herfried K. Wagner [MVP]" <hi***************@gmx.atwrote in message
news:uE**************@TK2MSFTNGP06.phx.gbl...

"John" <Jo**@nospam.infovis.co.ukschrieb:

>I am using below code to fill the drop down list of a combo box from a
table in the dataset;

Dim dv As New DataView(ds.Companies)
Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "Company"
dv.Dispose()
dv = Nothing

Unfortunately no data turns up in combo box. What am I doing wrong?

Remove the last two lines. You must not destroy the data source as long
as the control depends on it. In addition, setting local variables to
'Nothing' is (with very few exception) not the best style.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Cor Ligthert[MVP]]

John,

Are you sure you have the right control. I see seldom people call a combobox
txt that is mostly (forever) used for a textbox.

You have to set the displaymember in the way you did it as in 2 and 3.
However, normally the valuemember is set as well.

Cor

[RobinS]

You need to set the display member and value member. They can be the same
thing. They must be what field in the dataset you want to use.

Me.txtParent.DataSource = ds.Clients
Me.txtParent.DisplayMember = "CompanyName"
Me.txtParent.ValueMember = "CompanyID"

RobinS.
GoldMail, Inc.
------------------------------------
"John" <Jo**@nospam.infovis.co.ukwrote in message
news:OP**************@TK2MSFTNGP03.phx.gbl...

Hi

Thanks. No luck I am afraid. I have tried all this;

Dim dv As New DataView(ds.Clients)

1. Me.txtParent.DataSource = "dv.company"

2. Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "company"

3. Me.txtParent.DataSource = ds.Clients
Me.txtParent.DataMember = "company"

Any ideas? I have tested ds.Clients.Count and it returns more than zero so
there are records in the dataset.

Thanks

Regards

"Herfried K. Wagner [MVP]" <hi***************@gmx.atwrote in message
news:uE**************@TK2MSFTNGP06.phx.gbl...

>"John" <Jo**@nospam.infovis.co.ukschrieb:

>>I am using below code to fill the drop down list of a combo box from a
table in the dataset;

Dim dv As New DataView(ds.Companies)
Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "Company"
dv.Dispose()
dv = Nothing

Unfortunately no data turns up in combo box. What am I doing wrong?

Remove the last two lines. You must not destroy the data source as long
as the control depends on it. In addition, setting local variables to
'Nothing' is (with very few exception) not the best style.

--
M S Herfried K. Wagner
M V P <URL:http://dotnet.mvps.org/>
V B <URL:http://dotnet.mvps.org/dotnet/faqs/>

[Martin M]

Could try DaisyCombo released by www.springsys.com.
-martin

Hi

I am using below code to fill the drop down list of a combo box from a
table in the dataset;

Dim dv As New DataView(ds.Companies)
Me.txtParent.DataSource = dv
Me.txtParent.DataMember = "Company"
dv.Dispose()
dv = Nothing

Unfortunately no data turns up in combo box. What am I doing wrong?

Thanks

Regards