My scenario: I have a datagridview and it contains some data. User can select a row, or multiple rows in that datagridview, and they need to know a summary about those rows they selected.
Handling multiple rows in datagridview is easy enough, and I have no problem getting what the user need: Two numbers indicate how many item is selected, and their total weight in those rows. I passed that data to a small summary form to display, and I put the code to show that form under dgv.SelectionChange().
But then disaster follow: each time user select a row, that form will appear. Which is, if user select 20 rows, they will see 20 summary forms.... and any more than that, well.. you can imagine. I thought about putting something inside SelectionChange() to check if user has stopped their selection.. but can't think of any.
This seems like a very simple matter, but somehow I can't figure it out..
My question, how to know if a user has stopped their selection in a datagridview ?
I still don't have enough points to just comment, so my answer would be I don't think you can reliably without adding another control (ie, button). You can't read the users mind and since the number of rows can be variable, how would you ever know? You could try something like if the cursor leaves the DGV but that would be frought with issues as well. While it would be an extra click for those just selecting 1 row, I still think having a "Get Summary" button would be the way to go. Sort of like when selecting items to compare - you can click any number of items and while they may show which items you've picked so far in another area, the comparison table doesn't appear until you click the Compare button.
From what I understand, you actually have two options.
Add a button
Since you can't figure out when the selection is done, just add a button that will call the Form you want to display, that way you are sure that it will display only when user asks for it.
Use a timer
Another option is to use a Timer, every time the selection changed, you reset the timer to one second (to keep the example simple).
And whenever the timer does a tick, you call the Form and stop the timer. That way it will trigger one second (or less) after the user made the selection and gives him one second to change it...
Honnestly, I think the button option is the best, as you give the power to your user. Maybe they will want to select some rows but don't want to see your form, as they will only copy it to paste it somewhere else...
Related
I have a database where I don't want some fields showing depending on data in other fields. I'm still new to VBA, having learnt how to do things I need via the internet (there's not much call for it in my job so like to try it out on side projects) for the things I need and have managed to create some code that hides certain fields that aren't needed, depending on what's been entered in another field and that works okay, if not perfectly (I'd like it to only work on the current record and not all of them at once but will worry about that later). My problem is, if I'm entering information onto a record and any of those fields become invisible exactly as I would want them to, then if I have more records to complete and load a new record, those hidden fields are also hidden on the blank record before any data has been entered and I want each new record to show all fields from the outset.
Another thing I've noticed is that if I close the database, next time I go into it the hidden fields have unhidden themselves again so I know I'm missing something important.
Here's a screenshot of a bit of the code where I want 2 other fields (What_reason and Date_sent_to_new_owning_School) to be visible depending on whether the answer in the current field after update is "Standard" or "Non-standard":
I'm sorry if this is really entry-level stuff but I AM entry level and trying to learn. This bit does work, albeit not perfectly as I'd like it to only work on the record I'm in at the time, and not go through and hide that field in all the other records at once (which it's doing).
I've searched everywhere but can't find the answer and although I've tried, I'm nowhere near good enough at VBA to try and use common sense to work it out. Is this something that can be done? I'm okay with computers generally and with Access too but I'm aware there's an awful lot I don't know and this is why I'm trying to do new things and learn stuff that I've not used before. I have tried all day to get this to work but am admitting defeat and am hoping somebody here will be able to help me. I'll probably need 'idiot level' advice if that's possible, I know my limitations. :)
Do you know how to use the Event tab in the Property Sheet? You can set all of your fields to [field].Visible = True on either: On Current, On Load, or On Open
Screenshot of the Property Sheet and for the field that determines the visibility of all of the other fields; you can use the Event: After Update so that way when you click/tab away from that field, it'll make those changes for you!
Property setting affects ALL instances of control. Control will be visible/not visible for all records depending on conditions of current record. Therefore, dynamically hiding controls on form set in Continuous or Datasheet will NOT give the desired result of
only work on the current record and not all of them at once
Db is not going to 'remember' dynamic setting - code needs to be executed when form opens and/or navigating records - so it is needed in OnCurrent event as well as control's AfterUpdate.
Conditional Formatting can dynamically enable/disable textbox/combobox by record although control is still visible.
I am creating a form in access to allow users to input multiple production records for a day.
The form is set as a continuous data entry form and has data validation in place to ensure the information being entered is consistent.
I am having a problem where if a user starts typing something on a new entry, they essentially have no way to back out of it or cancel the entry without completely filling out the form.
I want to keep the data validation to ensure the data being recorded is accurate, but also do not want to lock users into an entry unless it is completely filled out.
I think the ideal would be to allow users to create a new record or select other records without needing to save the current record.
If it would be possible to make it so records only save when a button at the top of the form is pressed I think that would be ideal, but I have not found a good way to do this without requiring it on every single entry.
I have attached a picture of what I am talking about, there could be various error messages but essentially if you try to click off when a record is incomplete it will give an error until the entire form is filled out.
Example of Error Message and Image of Continuous Form
'deselect' without saving but still save what had been entered up to
that point.
That you can simulate by setting the DefaultValue of each control in the AfterUpdate event of each control:
Me!SomeTextBox.DefaultValue = Nz(Me!SomeTextBox.Value)
However, I'm not sure that will be a good idea. And you may have to reset the default values when opening the form.
To start, I am using Access 2003 and have a similar project that works correctly that I designed.
I am stumped as to why a particular field will not change dynamically like every other field until I "refresh".
Currently I have a task list that lists all items that need to be works. Containing a Status: New, Open, Closed; The account number, person who is working it and more.
The tasklist is just a form with a subform with a datasheet view that opens the task when you double click it. If a user opens a task, that task will be locked until they move on. If any information that is viewed in the task list is changed, it dynamically updates, all but the Status (which really is the most important) until the user manually refreshes it.
Does anyone know what I need to look for that would cause this? The Status is stored as an integer that joins with it's true value. I thought this may be the reason, however I have a similar tool I designed does not have this issue.
I've look into how they are joined, the code that changes this value, everything seems the same between the working and not working.
Any advice?
Thanks in advance.
edit any fields that are JOINED, do not seem to dynamically update until I hit refresh. However, the other database has this working. What am I missing that is different between them.
Solved.
I changed the object displaying the field from a textbox to a combobox, showed two columns with widths 0";1" and it works.
I have a table that has a series of filters across the top of it (as per usual.) This table feeds a massive graph that has multiple series of data in it. In order to hide different series of data I have grouped the information in the tables. I can then click on the minus button to remove a series of data from the graph by collapsing the group, or click the plus button to add it back in the same way. Yes, I know, not the best solution. It was an early effort, what can I say? My default is for all data to be hidden (all groups collapsed).
I have a user (a very important user) who wants to be able to use the filters across the top to find the specific series they are looking for. The filter will find the collapsed series just fine, but the series will not display because it is collapsed.
So, What I'm trying to do is get all groups to auto-expand when the filter is activated. This should work as a stop gap measure until I can simply redesign the chart.
The Problem: I can't figure out how to make Excel notice when the filter has been clicked on (or otherwise used). I've tried using Worksheet_Change and Worksheet_SelectionChange, but neither of them activate the code I have set up in the listener. That code, FYI, checks to make sure the filter is in use and adjusts the groupings accordingly. It should work fine if I can just get Excel to notice it's existence.
I've looked into making my own listener, but there's nowhere in the code I can insert it to make it activate. I just need a listener that will notice when the filter has been changed.
Any thoughts? After an hour of searching I'm stumped...
Okay, after some research I figured out a work around. The big problem here is that changing a filter does not raise any events that can be heard by VBA. Big problem.
Simple Solution: Create something that will activate a listener.
What I ended up doing was finding a cell somewhere outside of my table that wasn't going to be affected by the collapses, then I added a very simple formula (=Count(H:H)). Now whenever the table is collapsed the count is affected which activates the Worksheet_Calculate listener. And voila! I can dynamically change the groupings all I want :-).
So there you have it. If you need to detect a filter being activated via a Worksheet listener, you just need to set up a formula to activate the calculate listener.
Reference: [MSDN Article on the same thing].1 There is apparently a much more robust way to fix this problem as well which is detailed in the article.
You mentioned table, so assuming it's PivotTable you may try,
Worksheet_PivotTableUpdate(ByVal Target As PivotTable)
If it's simply a Targe Range change then,
If Intersect(Target, Range("A2"))
I have a datagridview with three columns (ID, Name, Address). It's bound to a database that contains around 500 items.
I want to be able to search the gridview for data given in a text box, and then highlight it.
If possible, pressing the Next button should find the next match, and the Reset button should clear all selections (nothing highlighted).
Please advise how to do it.
Thank you very much.
Add a search box and search button in the page. OnClick of the search button, search the datatable for the results and keep the result in the session. then on the bound event of grid, highlight the first row of from the search result set (which can be done by matching the primary/unique key of the table).
You have to handle most of code the manually for this. OnClick of next button, highlight the next row from the search result. again traversing of the search result has to handled manually like keeping the track of current result, moving to next result or moving backward etc.
then on click of reset button clear the search result session and bind the grid again without any highlighted rows.
I don't have code to post for you right now. but i hope if you implement this approach surely your problems will be resolved.