I have a data grid displaying results from a sql database. What I want to do is make it so that when I double click on a cell in the datagrid, a new window appears where that cell can be edited. I also would like to have all the info for that cell to be autogenerated into editable fields when the cell is double clicked. Any help or links to tutorials is appreciated. Thanks.
Try this DataGridView.CellDoubleClick Event
Did you consider using data binding? Simply put, you can bind your items list to DataGrid, and current item (eg. selected/double clicked) to your edit form's controls (TextBox, Label and whatever else you might have there).
Here are good starting points for windows forms: #1, #2. They cover problem you're facing. You can find data binding tutorials for ASP/WPF easily too, but especially first link covers entire concept pretty well.
Related
I am using a Library that has a class of type GanttChartDataGrid. For this question I am just concerned with the Datagrid. Currently, I used this code to acheive single click to edit in the grid. Single Click to Edit Code.
This works great, but the issue is, since my textboxes are in edit mode, they are exposed and you can see them. Making the datagrid look ugly here is a picture:
The cells under "Task" are all exposing their textboxes. In the next picture, I would like the cells to behave like how duration is. It shows it like a label within the grid and if it is not selected, once it becomes selected it displays the textbox.
I would like it to display the underlying textbox only when that row is selected.
Thanks!
I figured out my question.
I was databinding to Textboxes, I changed those to textblocks and now it works great.
To be clear I'm talking about Grid - not GridView or DataGrid or anything like that.
All I found online was about GridView and such.
I want to be able to select items with a mouse click or drag from a Grid.
What I have is a table filled with text implemented through a Grid. I want to be able to select "cells" in the Grid.
The reason I don't use DataGrid is because I couldn't find a way to set a cell's span.
Thank you,
Dolev.
I had nearly the same approach some month ago: Dynamic ui with rows and columns
Maybe this will help you.
In the end I used Selector.IsSelected attached property.
Selector Class
I modified the MouseDown, MouseUp, MouseMove event to record a rectangle created when dragging the mouse while the left button is held. Then I checked which cells are within that rectangle.
As a double check to see that the cell is really selected I used Selector.SetIsSelected and Selector.GetIsSelected.
I have a program in MVVM. In this program i have a view with a DataGrid. In this datagrid i have to show something like this:
The user mark some cells and after MouseUp, should be created a button over this selected cells. The first Problem here is, how to get the Column and the Row. It is in the SelectedCellsChanged-Event Argument. With help from the WPF MVVM Light i can give my ViewModel the Event and the Arg, but my workmate had already problems with visual elements in a ViewModel(He was get a error in the visual tree). And i know that a visual element should not be in a VM. Can anyone here give me a way to get this Column and Row-Spawn?
My second problem that i can't imagine me how to create the buttons in the correct cell. If i think right is it possible to build a new VM for every Button(with Property StartRowSpawn, EndRowSpawn, StartColumnSpawn, EndColumnSpawn) or for each cell?
Can you give me tip, how to solve that?
I thinked about a grid too. Get position while MouseDown and MouseUp and then find the Grid.Column and Grid.Row for that.
Edit
Okay i done my first problem with Interfaces, but i already have my second problem. Can anyone help me there?
I would rethink why you need to do this(or maybe you can explain more why to need buttons like this). What I do when I need to change the design of data in a data grid is use an alternate datatemplate or the details datatemplate for the datagrid row to chnage the format of the infomration, then you can use the same view model. You can bind the column spans to properties in your viewmodel but it gets difficult if you want the button quantities to be dynamic.
I want my ListBox to have columns, and one of those columns have to be a clickable URL.
How can I achieve this?
You can't do it in a ListBox. You can create your own control, or settle for another existing one. Based on the question, I'd guess you're not yet at the stage where you're creating your own controls. That takes a pretty good understanding of existing controls and the way they work under the covers (but a google search for creating Winforms Controls should yield plenty of instructions.) Edit added It looks like te 4th and 5th links in combination on that google search should get you what you need. You can create your own user control and then do an array of them)
As far as for other possible alternatives, have you considered a DataGridView? A DataGridView can have a hyperlink and it can have checkbox columns, so this would be one possible alternative.
Here's a link for having a Hyperlink column in a DataGridView.
Well, it is possible by using the CustomTabOffsets property (unreliable) or the DrawItem event. And implementing the MouseDown event to find out if that particular 'column' was clicked.
But there's little point, a ListView control with View = Details gives you the same functionality.
I have 2 questions concerning C#.
1) I have a dropdown menu with several items in them. They are clickable, but when I click one, the older clicked one stays selected. Click another and the 2 original ones stay selected, and so on. I don't want this. What I want is that when I click one of the dropdownitems, that one is that selected one and the others are not.
2) I have a listview items on a winform. I loaded some string elements into it from a file. Now what I want to do is to be able to edit those strings and even add strings, just by clicking on the rows in which the data goes.
I've checked google and MSDN for these problems, but nothing helps, so I turn here.
2) The ListView does not support that type of action. You can roll your own (pain in the #$$), or perhaps a DataGrid would be better suited to your purpose.
EDIT:
This link may help
This one too
For #1 I'm a little confused. If the DropDownStyle isn't set to simple something strange is occuring. It's not much but maybe you could try recreating the control.
For #2 the easiest solution I can think of is to set a TextBox to be equal to the selected text value from your listview. After that write a little function to update the selected index of the listview with the edited text from the listview.
Please comment if you have any more information about #1.