listbox to concatenated string

Dan Griffin

6. September 2014 01:39

I have a listbox with Multiple selection. Probably a simple question but how can I assign the Items in the list to a single concatenated (comma separated) string?

 

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  Ryan Kelley

  6. September 2014 02:28

  You need to cast the variable from your output in your form where the multi-selection takes place to an IList<Object> variable.

  Then, Assign a str variable (x ) to  an empty str= ""

  Then, do a For Each <Object> and use the cast variable mentioned above.

  Put an Assign activity in the body of the For Each where the string variable x  = item + "," + x

  You'll end up with a list that ends in ",", which you can just take out determining the length of x. Ex: finalString =  Left(x,Len(x)-1)

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  Dan Griffin

  6. September 2014 03:04

  Thanks for your help Ryan.

  I am getting an error on the Assign activity x = item + "," + x

  Option Strict On prohibits operands of type Object for operator '+'

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  Dan Griffin

  6. September 2014 03:16

  Looks like I just needed to add.

  x = item.toString + "," + x

  Thanks again.

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  Permanently deleted user

  6. September 2014 03:18

  fyi,

  it will be much safter and faster (?) with

  x = string.format("{0}, {1}", item, x)

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  Nico Burgerhart

  9. September 2014 03:50

   

  Import System.Linq and use the following to create a valid where clause:

  string.Format("columname IN ({0})",String.Join(",", CType(listvar, IList(Of Object)).Select(Function(value) "'" & value.ToString & "'")))

  Change columnname to the column name in your data.

   

  listvar is the object returned from the listbox.

   

   

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