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Power Platform Community / Forums / Power Apps / Prevent duplicate entr...
Power Apps
Answered

Prevent duplicate entries in Excel

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Posted on by biancadevera

My data source is an Excel file. Although I have set some validation rules in my file (wherein cells fill with red when duplicate was detected within the column), I want my app not to allow the SubmitForm function or error notification once duplicate entry was found.

 

I know this is possible with SharePoint list through the enforce unique values. Is this possible with Excel, too?

Categories:
Building Power Apps
I have the same question (0)
  • biancadevera Profile Picture
    biancadevera on at

    Please help @WarrenBelz @RandyHayes @poweractivate @StalinPonnusamy 

  • StalinPonnusamy Profile Picture
    StalinPonnusamy Super User 2024 Season 1 on at

    Hi @biancadevera

     

    We need to Lookup to validate for the same data exists or not.

     

     

    If(
 IsBlank(
 LookUp(
 [@ExcelTable],
 Condition
 )
 ),
 SubmitForm(EditForm1),
 Notify("Data exist already")
)

     

     

    Sample using my Datasource

    If(
 IsBlank(
 LookUp(
 [@ProjectsExcel],
 Phase = DataCardValue4.Text
 )
 ),
 SubmitForm(EditForm1),
 Notify("Data exist already",NotificationType.Warning)
)


    Thanks,
    Stalin - Learn To Illuminate

  • biancadevera Profile Picture
    biancadevera on at

    HI @StalinPonnusamy 

     

    Currently, I have this code:

     

    If(
 Len(txtValue.Text)=0 || Len(drpValue.Selected.Value)=0,
 Notify(
 "Please fill out all fields marked with asterisk (*)", 
 NotificationType.Error
 ),
 Patch(
 {update_here}
 );
 Navigate(SuccessScreen)
)

     

    How can I include the Lookup validation on my code? 

  • StalinPonnusamy Profile Picture
    StalinPonnusamy Super User 2024 Season 1 on at

    Hi @biancadevera 

     

    Please try this

     

    If(
 Len(txtValue.Text)=0 || Len(drpValue.Selected.Value)=0,
 Notify(
 "Please fill out all fields marked with an asterisk (*)", 
 NotificationType.Error
 ),
If(
 IsBlank(
 LookUp(
 [@ProjectsExcel],
 Phase = DataCardValue4.Text
 )
 ),
 Patch(
 {update_here}
 );
 Navigate(SuccessScreen),
 Notify("Data exist already",NotificationType.Error)
)
)

     


    Thanks,
    Stalin - Learn To Illuminate

  • biancadevera Profile Picture
    biancadevera on at

    Hi @StalinPonnusamy 

     

    I had this error:

    biancadevera_0-1636483001418.png

    Please check this out:

     

    biancadevera_1-1636483046193.png

     

  • StalinPonnusamy Profile Picture
    StalinPonnusamy Super User 2024 Season 1 on at

    Hi @biancadevera 

     

    Can you make sure the Lookup condition is correct as per your table and column-like

     IsBlank(
 LookUp(
 [@Tablename],
 ColumnName = DataCardValue1.Text
 )
 ),

     

    Post your code, so that we can validate your entire code.

     

  • biancadevera Profile Picture
    biancadevera on at

    Hi @StalinPonnusamy 

     

    Please check my code:

     

    If(
 Len(txtTicketNumber.Text)=0 || Len(drpStatus.Selected.Value)=0 || Len(drpPriority.Selected.Value)=0 || Len(txtIssueDesc.Text)=0,
 Notify(
 "Please fill out all fields marked with an asterisk (*)", 
 NotificationType.Error
 ),
If(
 IsBlank(
 LookUp(
 [@Table1],
 Ticket Number = txtTicketNumber.Text
 )
 ),
Patch(Table1,
If(TicketInfo.Mode=New,Defaults(Table1),galleryDashboard.Selected),
TicketInfo.Updates,
DetailsInfo.Updates,
 );
 Navigate(SuccessScreen),
 Notify("Data exist already",NotificationType.Error)
)
)

     

    Table1 - name of table

    Ticket Number - name of column

  • Verified answer
    StalinPonnusamy Profile Picture
    StalinPonnusamy Super User 2024 Season 1 on at

    Hi @biancadevera 

     

    We need to check Ticket numbers exist when adding a new record.

     

    If(
 Len(txtTicketNumber.Text)=0 || Len(drpStatus.Selected.Value)=0 || Len(drpPriority.Selected.Value)=0 || Len(txtIssueDesc.Text)=0,
 Notify(
 "Please fill out all fields marked with an asterisk (*)", 
 NotificationType.Error
 ),

If(TicketInfo.Mode<>New || (TicketInfo.Mode=New && IsBlank(LookUp([@Table1],Ticket Number = txtTicketNumber.Text))),
Patch(Table1,
If(TicketInfo.Mode=New,Defaults(Table1),galleryDashboard.Selected),
TicketInfo.Updates,
DetailsInfo.Updates,
 );
 Navigate(SuccessScreen),
Notify("Data exist already",NotificationType.Error) 
)
)

     

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