Develop Reference

Fail to make only one column editable

I cannot make single column to be editable in DataGridView. I tried to do it in the designer but didn't get positive results. I tried scripting it like
datagridview1.Columns["theColumn"].ReadOnly=false;
but that didn't work. Seems like the property of ReadOnly in DataGridView is only that is considering, no other modifications count. I actually try to make DataGridViewColumn that contains CheckBoxes editable, while other columns I get from DataBase.

You can easily do it through the Edit Column wizard of the grid view, Go to edit column windows and select the columns that you want to make read only and in the right pane just set the ReadOnly property to true.

Visual Studio did not allow me to set single column ReadOnly property false when Enable Editing property of DataGridView is unchecked(???). But HOKBONG's comment helped. Thanks guys.

Hide a Column from ColumnChooser

Currently I'm developing an application with devexpress, and I had set two columns to hide like this:
gridView1.Columns[2].Visible = false;
However, when I run my program, there is an option from the DataGrid called "Selector de Columnas" (in English ColumnChooser). In this option the two columns that I set to be hidden are shown. I don't want the user to see these columns but I still need them, so I just want to hide them.
I searched in the online documentation from Devexpress and they state here that columns can be hidden with the ShowInColumnChooser property. However I'm not able to hide these columns in the ColumnChooser. They don't show you any example, just this line of code:
public bool ShowInColumnChooser { get; set; }
I guess this is a property from some Devexpress control, however they don't state how to use it.

All the links you referred to are related to the WPF DXGrid, but as far as I can see from your screenshot, you are working with the XtraGrid (WinForms). If so, you should use the OptionsColumn.ShowInCustomizationForm property as follows:
column1.OptionsColumn.ShowInCustomizationForm = false;
Related help articles:
Column and Card Field Overview
Customization Form

If you want to prevent a specific column from being showed/hidden, set the column's properties OptionsColumn.ShowInCustomizationForm and OptionsColumn.AllowShowHide to false.

Enabling and disabling of columns in Infragistics UltraGrid

I have an Infragistics grid and I want to disable and enable some columns based upon some requirement. I have read some articles that say to use AllowUpdate = DefaultableBoolean.True but it did not work for me.

I suppose that when you talk of disabled columns you mean disable editing in these columns.
Also you don't specify the language, so I will use C#
UltraGridColumn c = grdWork.DisplayLayout.Bands[0].Columns["YourColumnName"];
c.CellActivation = Activation.NoEdit;
c.CellClickAction = CellClickAction.CellSelect;
The property CellActivation could also be set to Activation.Disabled or Activation.ActivateOnly.
The property CellClickAction allows to set an appropriate selection status for the cell clicked. You could use CellSelect or RowSelect. (This last one, to mimic the behavior of a ListBox)
As usual, the real difficulty is to find the correct property. Then Intellisense will give you a quick and fair explanation of the meaning of these values.

If you just want to show and hide the columns as needed then you can try the following.
UltraGrid myGrid = new UltraGrid();
//Bind to your data here
myGrid.DisplayLayout.Bands[0].Columns["ColumnName"].Hidden = true;

How to control Column Type in DataGridView that is bound to a CustomObject?

I have a DataGridView in a C# WinForms app that is DataBound at runtime (through Form_Load) to a custom Object.
In the design view of the DataGridView I have no columns set up.
When the Form loads the the columns are automatically created based on the data in the Custom object that it is DataBound to.
My question is how can I control the the Columns that are automatically created.
For example if I want one of the columns to be a DataGridViewLinkColumn instead of the DataGridViewTextBoxColumn that is automatically created?

The default columns are based on the data-type. I haven't checked, but for a link you could try exposing the data as Uri, but that might be hopeful. Really, if you want a specific type of column - add the columns through code and set DataGridView.AutoGenerateColumns to false.
As Andrew implies; normally something like reflection is used to generate the columns, and you'll get a column for every (browsable + public + readable) property. There is a layer of abstraction on top of this if you need, but this won't help with adding a hyperlink column.

You can pre-create your columns in the designer. If the name of the column matches the name of the property the column will end up bound to, the databinding will take care of the DGV population for you as before.

Editing DataGridView cells without a bound source?

New to .NET/C# stuff so please forgive me if it's something obvious ;-) I'm trying to get cell editing going on a DataGridView control (WinForms). I've set all "ReadOnly"-type options to false, I've set EditMode to "EditOnEnter", I've added a row and selected a current cell programmatically, I've tried calling BeginEdit() but all to no avail - I can't edit the cell's contents.
The only thing that I can think of is that the control isn't bound to a data source - I'd like to be able to use it in a spreadsheet manner, so as the contents are typed in, I can then add new rows etc, and on a button click, the data can be retrieved programmatically for later use.
Is this possible?
Thanks,
Rich

I do that all the time (i.e. allowing users to edit a column without the DataGridView being bound).
Try this:
Set EditMode to EditOnKeystrokeOrF2
Ensure ReadOnly on the DataGridView is set to false
Ensure that ReadOnly on the column you want to edit is set to false
That should work.