I have a FormView that contains three list boxes and a user control. The user control is a grid that inserts and updates data while the form is in edit or insert mode. The problem I am having is that the postbacks generated by the user control are wiping out the listbox values. There is existing code that rebuilds the ListBoxes when a post back occurs by clicking on the insert/update button, and it works correctly. But when the user control does a post back the request.Form collection for the ListBoxes is null. The code that rebuilds the list box values uses Request.Form to retrieve the values. I don't want validation to occur everytime the user control causes a post back, but what changes do I need to make to the user control or the FormView so that the Request.Form variables are not null?
the listbox options were being filled in via a popup, but the values were not selectd. The idea was that whatever options appeared in the listbox were the ones to update, so all i had to do was use javascript to select them all before each page load, and problem solved.
Related
I am attempting to build an app with Microsoft powerapps that will be writing/reading data to/from an excel sheet.
I have created a form in powerapps from a table in the excel sheet. I am curious to know if anyone knows how to fill the data in a field based on a button selection on a previous screen.
As an example let's say the following fields are in the form; Location, Action, Item, Username.
This is what I am imaging and would like to do;
I would like the first two fields to be filled by selecting buttons on a previous screens instead of a drop down menu in the edit form view. the last two field can be filled by inputting text on a thirds screen.
The flow:
Screen1; presents two 4 locations in the form of buttons*doesn't necessarily have to be a button but function like one.
4 locations: NY, LA, AZ, LN
when users selects "NY" button, "NY" is filled/stored in to the "location" field in the form and the screen navigates to the next page where the user will select the actions.
Screen2; presents two 2 actions in the form of button.
2 Actions: remove, add
when users selects "remove" button, "remove" is filled/stored in to the "action" field in the form and the screen navigates to the next page where the user will fill the other two fields in a text field.
Screen3; has two text fields where user can fill in the rest of the information for item and user name. Location and Action should be prefilled at this point. When the user submits the form all data is submitted and a row is created in the excel table with all the information captured.
any information how to make a button selection on a previous screen prefill a field in a form that would be awesome! thank you for reading.
It sounds like you want to use a collection. A collection can be used similar to a global variable and will allow us to access data on a different screen than the one we set it on.
Some useful information can be found here:
https://powerapps.microsoft.com/en-us/tutorials/working-with-variables/#create-a-collection
https://powerapps.microsoft.com/en-us/tutorials/function-clear-collect-clearcollect/
Based off of your flow, let's assume that the screens are named as follows:
Screen1 will be "SpecifyLocation"
Screen2 will be "SpecifyAction"
Screen3 will be "FinalizeInput"
The names are arbitrary, but I think they'll make the following example easier to follow.
On the screen "SpecifyLocation", we're going to create four buttons. They will all be identical, except for the name of the location they reference. For instance, the button referencing "NY" would be as follows:
Text = "New York"
OnSelect = ClearCollect( LocationMetadata, "NY" ); Navigate(SpecifyAction,ScreenTransition.Cover)
Please note that the OnSelect value is two different functions separated by a semicolon. The first function, ClearCollect(), clears all information in a collection and then writes a new entry. In this case, we have a collection named LocationMetadata into which we are writing the value "NY". The second function, Navigate(), changes which screen we are looking at.
On the screen "SpecifyAction", we're going to create two buttons. They will be similar, except for the action they refer to. For instance, the button referencing "Add" would be as follows:
Text = "Add"
OnSelect = ClearCollect( ActionMetadata, "Add" ); Navigate(FinalizeInput,ScreenTransition.Cover)
As was the case before, we've created a button that calls two functions when clicked. They are the same two functions as last time; however, we've changed LocationMetadata to ActionMetadata in our ClearCollect() call, since we want to store a different piece of information. We've also changed our Navigate() call to move us over to the "FinalizeInput" screen.
I'm not entirely sure how you've got your final screen laid out, but in any case, you'll want to access the data we stored in collections previously. This can be done with the function First(), which returns the first element of a collection.
To access our selected location, you can use: First(LocationMetadata).Value
To access our selected action, you can use: First(ActionMetadata).Value
You should be able to supplement whatever extra data is collected from your user on this final screen with the collections we set up.
I am trying to make a 2nd djFilteringSelect using a #Dbcolumn depending on the value selected in the 1st djFilteringSelect control. That's a common task, using a partial refresh. However, each of the controls is within a dialog control from the extension library. One dialog pops up, the user selects a value, and automatically the 1st dialog closes and the 2nd opens. YOU CAN'T SEEM TO REFRESH THE FIELD (I'm guessing b/c it's not in the DOM). I've tried writing the first value to to an computed field and/or a text box on the main Xpage using CSJS and then looking for that value for the second lookup. Also, tried with SSJS, etc. I tried do updates and writing to fields on either the onChange or on the click of button. How do I go about using the selected value of the first to do the lookup in the 2nd?
You can use a single dialog control where you hide and show the relevant controls. I am using this approach in several apps.
In the relational controls sample db (xpagesjdbc.nsf) there is an example called JDBC_RowSetDatasource. This uses a view panel and has the check box turned on in the view panel to allow the user to select a document. Then there is a button to delete the selected docs using a simple action, delete selected documents. This deletes the document but until the button with the code that has jdbcData1.acceptChanges() is pressed the changes are not committed and the row shows as to be deleted (first icon column with the isRowDeleted() call to determine the icon).
I am working on a similar situation but with a repeat control. I can delete the row with #jdbcDelete but that is immediate. Looking at the data it shows the row is gone from the data even before acceptChanges() is called.
Since I can't use the simple action to delete selected documents (no view panel) what is the Java equivalent to delete the row in a similar manner? I have tried deleteRow() on both the variable for the data set and for the row but get an error in both cases.
Howard, the simple action just memorizes the primary keys of the records as to be deleted. If you want to simulate that you need to take a similar approach (using a ViewScope variable or bean) to keep track of your "deleted" records and a method that executes the actual deletion.
Smells like a case for a bean
I have an extension pages dialog box on the same page as a viewpanel that has check boxes enabled. If I check some check boxes then show the dialog box, the selections in the view panel become unselected. Is anyone else seeing this?
I have the same issue and it looks like we're trying to do the same thing. I plan to add the selected IDs to a sessionScope, update their values, then remove the sessionScope.
I found this one, so I'll update here to see if it works: get the unid of selected documents and save to scoped variable
UPDATE:
I got it to work by setting a sessionScope variable for the selected IDs, as in the above example:
sessionScope.put("SelectedIds", getComponent("viewPanel1").getSelectedIds());
In the SSJS script, I changed the code to read the sessionScope array instead of the viewPanel's selections.
Fortunately, the IDs are very small (3 characters), so if there are a lot of documents, it should be ok.
Good luck!
I have a list box that I am adding and removing items with client side javascript. The issue is that these new values are not being saved to the list box(binded to field). The only value that comes back is the original one that was set in list box. The values are all there on the client since I can loop through the array. How can I get these values to replace the value that is currently there?
By default the listbox have a validator that you may not see during save, (you need to add error controls to see it) and the validator do not accept new values added using CSJS
If you set disableValidators="true" in the listbox control you suppress the validator and the save works fine. you also need to select the entries in the listbox using CSJS before you save,
Credits goes to Jesse Gallagher
Thomas
In the List Box properties, you must to set mutiple = true