Problem getting value from combobox and late binding

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moondaddy - 10 Sep 2004 07:05 GMT

using vb.net 1.1 I have a combobox which I'm trying to get the selected
item's value. the problem is that this class uses Option Explicit On and
Option Strict On so the following line gets a compile error:

m_GoToID = CType(cmbGoTo.SelectedItem.row(0), Int32)

with the blue squiggly under cmbGoTo.SelectedItem.row(0)

and the compile error is:

Option Strict On disallows late binding

I populated the combo by binding it to a dataset table.

Can anyone help on this?

Thanks

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moondaddy - 10 Sep 2004 07:31 GMT

I figured it out. Earlier I had tried this:

objB.myCombo = CType(myCombo.SelectedValue, Int32)

but got an error (I forget just what the error was), but I've figured out
how to make this line work. In order to use 'SelectedValue', I needed to
first define the value member. So when I load data into the combo, I call
this line:

Me.myCombo.ValueMember = "ID"

Where ID is the name if the ID column in the dataset.

Now it works and compiles too when using Option Strict On.

> using vb.net 1.1 I have a combobox which I'm trying to get the selected
> item's value. the problem is that this class uses Option Explicit On and
[quoted text clipped - 13 lines]
>
> Thanks

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Jeffrey Tan - 12 Sep 2004 14:38 GMT

Hi moondaddy,

I am glad you figure it out.

ComboBox.SelectedItem will return a System.Object type object, it did not
has a row(0) member, so you can not do like this.

Also, if you do not specify ValueMember for ComboBox, combobox.selectedvalue
will return null object.

Hope this helps

Best regards,
Jeffrey Tan
Microsoft Online Partner Support

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Problem getting value from combobox and late binding

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