I need to create a custom control based on a datagrid. My need is to show the events of the day (I know there are other third-party controls).
I should redesign the cells in the datagridview but I do not know where to start, obviously do not want the code I understand that it is not a simple thing, but I would like to see one of your left indication on what to focus on.
Below is an image of what I would get
Related
Im in the process over converting some legacy VB6 code over, in particular a TDBGrid linked to an ADODC data control.
Everything is going ok, ive got my columns and bindignsource reading sweet as a nut and performing what its supposed to do, correctly - but im having a problem converting this type of method over.
In the vb6 app, while a user scrolls through the grid, the grid fetchstyle (similar to cellformatting) go looking at the equivalent row of data in the adodc.
In .net, I cant seem to get that functionality to be the same, unless I add that field from the database, into a column in the grid and make it invisible (which I dont really want to be doing if i can help it) then read the cell via cellformatting and then perform some action, such as changing the cellstyle backcolor to something.
Is it possible to refer to a row in the bindingsource that would be the same row in the grid that a user is at, without having that field from the bindingsource - in a DGV column?
or do i just have to put up with placing more columns in the DGV than I want and just live with it?
Thanks!
I think you want the BindingSource.Current
object.
Is it possible to use the built in triangle button to filter records for datasheet form in continuous forms?
If not. Then do you think if it is possible to code such a feature?
Also, is it possible to add a select all button within the datasheet form itself instead of placing it in a form containing the datasheet as a subform?
I’m afraid I have no choice but to use continuous forms because of how limiting datasheet forms are.
No, this is not an available feature. Also, no workarounds are available.
You can add an image with the filter icon and try to determine if the column is filtered, but that's both very difficult and not very useful (since you can't get the dialog to adjust the filter when you click on it).
If you want the filter dialog, however, you can just right click one of the fields to add a filter or adjust an existing filter.
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...
I am trying to create a wrapper to replace the sheridan datagrid actvex control with a datagridview.
The sheridan datagrid control supports an event which fires just before the user is going to add a row to the grid called BeforeInsert.
Does anyone know of an equivalent event in the datagridview control or or some other code I could write which produces the same effect?
I'm having a look at all the events here, I don't see one for Adding or Inserting a row, just Added. Although there's one for Deleting and Deleted strangely enough. I won't pretend to know why. To your question, how exactly will users be adding rows? You could try playing around with the "AllowUserToAddRowsChanged" event and change that property programatically when the user wants to add a row.
I am currently implementing drag and drop using the DataGrid provided in the Silverlight SDK and I want the user to be, easily, able to drag multiple items to another list.
The grid's selection gets updated on the MouseDown event so the only way the user have to drag multiple items is to press Shift while begining the drag operation. This is not really obvious and, for me, the natural way whould have been to just click the selected block of rows and drag them. To do so, the selection needs to be updated on the MouseUp event.
I've tried to derive from the DataGrid to inject my custom DataGridRows but the DataGrid doesn't expose a way to replace the type of rows it creates.
Anyone have a solution or ideas for this?
Thank you,
Jacques.
Yes, it's unfortunate that the selection is updated on mousedown. You will need to perform some work in the mousedown event to work around this. This codeproject article should help:
http://www.codeproject.com/Tips/338594/Drag-drop-multiple-selected-rows-of-datagridview-w