Set PrimaryKey on datatable - in order to use .find

Permanently deleted user

18. Juni 2015 04:46

Hi,

 

I have a datatable set up and I want to use the .find method to look up a particular row.

 

The find method takes a value and applies it to the primaryKey column.

You first need to assign a primaryKey column by passing in an array of DataColumn objects to the datatable.PrimaryKey method.

So I have created a variable array of type DataColumn (arrDataColumns) but when i try to assign a column to the array it refuses to assign!

my assign activity looks like this:

arrDataColumns(0) = mydatatable.Columns(0)

(which is where it fails with an 'object reference not set to an instance of an object' error.

but i would go on to another assign activity to set the primary key like this:

myDataTable.PrimaryKey = arrDataColumns

can anyone help?

Ni ck

 

 

 

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  Kathy Andersen

  26. Februar 2016 16:11

  Mark,

   

  I am interested in the workflow you posted, as I am trying to learn how to manipulate datatables and specifically add datarows.  It appears that this is only a partial workflow?  Would you mind posting the complete workflow if you still have this available?

   

  Thanks so much!

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