To add user input to a ComboBox control in Power Apps and allow the users to add new entries, you can follow these steps:
1. Add a ComboBox control to your Power Apps form. Select the ComboBox control and go to the "Properties" pane on the right.
2. In the "Items" property of the ComboBox, specify the data source that contains the existing designators of electronic parts. For example, if you have a SharePoint list as the data source, you can set the "Items" property to something like `SharePointListName.ColumnName`.
3. Enable the "Allow searching" property of the ComboBox. This allows users to search for existing items in the ComboBox.
4. Enable the "Allow multiple selections" property of the ComboBox. This allows users to select multiple items from the ComboBox.
5. Set the "Update" property of the ComboBox to a collection that will store the selected items. For example, you can create a collection using the `ClearCollect` function:
```
ClearCollect(SelectedItems, ComboBox.SelectedItems)
```
This will store the selected items in the "SelectedItems" collection.
6. To allow users to add new entries, you can use an additional text input control and a button. Add a text input control where users can enter new designators and a button to save the new entry.
7. On the button's "OnSelect" property, add the following formula to add the new entry to the ComboBox choices:
```
Collect(ComboBox.Items, {Value: NewEntryTextInput.Text})
```
This formula uses the `Collect` function to add a new entry to the ComboBox's data source. Replace `NewEntryTextInput` with the name of your text input control.
8. Save and test your Power App to see the changes in action. Users should be able to select existing designators from the ComboBox or enter new ones using the text input and button.
As for beginner-friendly tutorials, the Microsoft Power Apps documentation provides a comprehensive resource for learning and exploring various features. You can refer to the official documentation for ComboBox controls and explore related topics.
