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How can I set the combo boxes DefaultSelectedItem property to blank every time the form is loaded?

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Posted on by davidvo68

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Hi all,

I have an app with a few combo box which data source are from SharePoint choices columns.

On the form along with these combo boxes, I also have a submit button.

The below properties are what I have on my combo boxes and button controls..

First combo box:

Items: Choices([@Ballot].'Select Group')

Second combo box:

Items: (Choices([@Ballot].'Voter Name')

Third combo box:

Items: (Choices([@Ballot].'Score')

Button Submit:

OnSelect:

SubmitForm(FormVoting);
NewForm(FormVoting);
Navigate(ScreenConfirmation);

Question:

1- How can I set my submit button control to be disabled until ALL combo boxes are filled/selected?

2- How can I setup a pop up box it the submit button is pressed without all combo boxes are filled?

Thank you all in advance.

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Building Power Apps

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CU-18081211-6 9,272 Moderator on at

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@davidvo68 ,

1. You need to reset the form before you create a new instance:

SubmitForm(FormVoting); ResetForm(FormVoting); NewForm(FormVoting); Navigate(ScreenConfirmation);

2. Set the DisplayMode property of the submit button to something like:

If( IsBlank(ComboBox1.Selected)|| IsBlank(ComboBox2.Selected)|| IsBlank(ComboBox3.Selected), DisplayMode.Disabled, DisplayMode.Edit )

3. You can setup a popup box composed from a label control (containing the error text) put in front of all other controls, and set it Visible property to a boolean context variable (like showPopUp). In this scenario, use the OnSelect property with a similar formula like the previous one:

If( IsBlank(ComboBox1.Selected)|| IsBlank(ComboBox2.Selected)|| IsBlank(ComboBox3.Selected), UpdateContext({showPopUp:true}), SubmitForm(FormName) )

Also, keep in mind that the user need to have a way out from the popUp so put a button or icon where the OnSelect property to be set to:

UpdateContext({showPopUp:false})

Hope it helps !

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davidvo68 114 on at

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This worked great.
Thank you for your help Gabibalaban.

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