dropdownlist for excel file created in vb.net doesnt ignore blanks

[André_2]

Hello to all

I have a problem
When i create an excel file with some dropdownlists in my vb.net page the dropdownlist in the excel file doesnt ignore balnks even with the ignore blank property set to true

best regards

[G_Waddell]

Hi,

Are you using a datasource to provide the dropdown values? Could the values be either NULL values or spaces?

[André_2]

they are empty cels

[G_Waddell]

Hi could you post the code you use to populate the lists?

[André_2]

With oSheet.Range(oSheet.Cells(2, j), oSheet.Cells(100, j)).Validation

                            .Add(Type:=Excel.XlDVType.xlValidateList, AlertStyle:=Excel.XlDVAlertStyle.xlValidAlertStop, Operator:=Excel.XlFormatConditionOperator.xlBetween, Formula1:="=APOIO!$A$2:$A$100")


                        .IgnoreBlank = True

                    End With

[G_Waddell]

Hi

Try changing the formula part of your code to:
Formula1:="=Trim(APOIO!$A$2:$A$100)"

[André_2]

Nope it gives me an exception
Excepção de HRESULT: 0x800A03EC

[G_Waddell]

hmmm, I think it is picking up space characters as values...
I may have the formula wrong it could be : Formula1: ="=APOIO!$A$":$A$100.TEXT.TRIM"

[André_2]

Nope same exception

[G_Waddell]

Drat! I was sure you could carry out a trim on a range...

[André_2]

Ye i thought so too but its not possible forsome reasn

[G_Waddell]

Hi,
I think we are trying to do too much on one line of code and screwing up the syntax. So how about this?

'Tidy up your source data first 
dim SourceRange = oWorkbook.Sheets("APOIO").CELLS(A1:A100)
   SourceRange.Text = SourceRange.Text.Trim
'Now use the tidied data to populate the dropdown   
With oSheet.Range(oSheet.Cells(2, j), oSheet.Cells(100, j)).Validation
   .Add(Type:=Excel.XlDVType.xlValidateList, AlertStyle:=Excel.XlDVAlertStyle.xlValidAlertStop, Operator:=Excel.XlFormatConditionOperator.xlBetween, Formula1:="=APOIO!$A$2:$A$100")
   .IgnoreBlank = True
End With

[André_2]

nope that does not work either .
i amtrying a diferent aproach i will use gembox
but is there a wa in gembox to do this

[André_2]

???

[G_Waddell]

Never used gembox...

[krishnap2w2]

There are multiple ways in which you can create a dropdown list in Excel.
Data Validation
Form Control (Combo Box)
ActiveX Control (Combo Box)
But of these methods, Data Validation is the most used method, for its simplicity. Later on, I’ll explain the pros and cons of each method, so that you can choose the best method among these for you.

Before going to explain how to create a dropdown list, let me tell you what a Data Validation is? It controls the type of data or the values that users enter into a cell. For example, you may want to enter only positive values in a cell, only ‘time’ in a column, or a text below the specified length. You can define all these conditions through Data Validation. Even dropdown list is a data validation where you’re constraining the user to use only those set of words in that cell. Again, in creating a dropdown list through data validation, there are different ways in doing it.

Writing the complete list in the Source Field
1) Select the Cell (or) set of Cells in which you want to see the dropdown. 2) Go to “Data” Tab –> Data Validation –> Data Validation 3) Select List in the “Allow box” 4) Just enter the names you want to see in the dropdown list in the “Source” Box