Btn Click

Hi,

I have the following code;

Code:

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Private Sub BtnChk_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnChk.Click

        'TODO: This line of code loads data into the 'ProductDetails.QryProductDetails' table. You can move, or remove it, as needed.
        Me.QryProductDetailsTableAdapter.Fill(Me.ProductDetails.QryProductDetails, TxtTruckTyp.Text, TxtModel.Text, TxtCategory.Text)


        Me.TblTruckTypeTableAdapter.Fill(Me.TruckTyp.TblTruckType)
        CmbTruckTyp.SelectedIndex = CmbTruckTyp.FindStringExact(TxtTruckTyp.Text)


    End Sub

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At run time, I click the button and it works ok. Th ereason I inserted the code in BOLD is to refresh the combo box (CmbTruckTyp) and retain the selectedIndex by reading it again from TxtTruckTyp.

Reason why I am doing this is because at run time if I do multiple selection from the combo box the value keep duplicating itself in the dropdownlist and I wanted to avoid that.

The problem am facing now is no duplication, however, at when I click the button the cmbTruckTyp becomes blank until you select again. ie.,

Code:

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CmbTruckTyp.SelectedIndex = CmbTruckTyp.FindStringExact(TxtTruckTyp.Text)

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doesnt take effect..

Any help please

thanks

Hi Dr223

CmbTruckTyp.SelectedIndex relates to the Actual position of each item. This will be an integer

imagine it like

index Item
0 I1
1 I2
2 I3
3 I4

i think you want CmbTruckTyp.SelectedItem

Hope this helps

Ian

Ian

Ok Tried;

Code:

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  Me.TblTruckTypeTableAdapter.Fill(Me.TruckTyp.TblTruckType)
  CmbTruckTyp.SelectedItem = CmbTruckTyp.FindStringExact(TxtTruckTyp.Text)

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Now, it refreshes the combo box but doesnt have the selecteditem prior to the refresh, instead it selects the top value of the dropdownlist.

Therefore, for test purposes I removed...

Code:

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CmbTruckTyp.SelectedItem = CmbTruckTyp.FindStringExact(TxtTruckTyp.Text)

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I noticed that when the combo box is refreshed TxtTruckTyp.Text is then set to BLANK, WHY? So then I tried to remove ;

Code:

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Me.TblTruckTypeTableAdapter.Fill(Me.TruckTyp.TblTruckType)

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Now, the TxtTruckTyp.Text retains the selecteditem of the CmbTruckTyp.

Therefore, could the problem be

Code:

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Me.TblTruckTypeTableAdapter.Fill(Me.TruckTyp.TblTruckType)

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and if so why will it affect the textbox while it should only be refreshing the combo box?

Thanks

when you fill a combo box it will make selections and if you have code in CmbTruckTyp.selectedindexchanged or any of those it will run that code

when you bind data to a combox i find it necessary to have a boolean called something like initilising. make it true before you bind it and then false when its bound, then in the CmbTruckTyp.anythingchanged you'll want something like

Code:

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if initilising = true then exit sub

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this will stop code being run before you want it to

Ian