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value can not be null parameter name key

  • 30 April 2023
  • 2 replies
  • 411 views
J
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Userlevel 3
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Hi,

I create a new data field into my purchase order screen poline DAC,

[PXDBString(10)]
[PXUIField(DisplayName="uomnew")]

Then I try to set field value in rowselected event.

 public class POOrderEntry_Extension : PXGraphExtension<PX.Objects.PO.POOrderEntry>
  {
    #region Event Handlers

    protected void POLine_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
    {
      
      var row = (POLine)e.Row;
      POLineExt poLine = PXCache<POLine>.
           GetExtension<POLineExt>(row);
      poLine.Usruomnew= "news";
     if(poLine != null){
       poLine.Usruomnew= "new";
     }
      
    }

    

    #endregion
  }

 

After adding POOrderEntry_Extension and published It shows an error below like that.

Can you please give solution for that.

icon

Best answer by Naveen Boga 1 May 2023, 05:42

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2 replies

Naveen Boga
Rank
Userlevel 7
Badge +17

Hi @jeewanishalika20  It is NOT recommended to assign the value in the Row_Selected event.

Please move it a proper event.

In the above code, there are no NULL checks hence you're getting this issue. I have modified your code and below is the working code.

 

    public class POOrderEntry_Extension : PXGraphExtension<PX.Objects.PO.POOrderEntry>
    {
        protected void POLine_RowSelected(PXCache cache, PXRowSelectedEventArgs e)
        {
            var row = (POLine)e.Row;
            if (row != null)
            {
                POLineExt rowExt = row.GetExtension<POLineExt>();
                if (rowExt != null)
                {
                    rowExt.Usruomnew = "news";
                }
            }
        }
    }

 

Naveen B
J
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Userlevel 3
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Hi @naveen,

 

Thanks it’s working.

Regards

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