Hi,

I am using RadGridView and using MVVM model. In Grid I want to disable cells in each row for particular column. I have written below code but the (GridViewRow row) is always null but I get the number of rows in grid.
Kindly help, so that I can get GridViewRow.

public void OnDataLoadedCommandExecuted(DataLoadedCommandParameter commandParameter)
        {
            RadGridView currentGrid = commandParameter.CurrentGridView;

           
              
                foreach (object item in currentGrid.Items)
                {
                    GridViewRow row = currentGrid.ItemContainerGenerator.ContainerFromItem(item) as GridViewRow;

                    if (row != null)
                    {
                        GridViewCellBase cell = (from c in row.Cells
                                                 where c.Column.UniqueName == "Test"
                                                 select c).FirstOrDefault();
                        if (cell != null)
                        {
                            cell.IsEnabled = false;
                        }
                    }
                }
           
        }

You may try to handle the RowLoaded event instead. However, I may suggest you to work withe IsReadOnlyBinding property. Thus you will be able to decide on row level which cell should be editable or not. For further reference, please take a look at our online documentation.
 

I am sending you a sample project illustrating the implementation of IsReadOnlyBinding so that you can make some of the cells in a row read-only or not. If you want to keep up the grey color of a disabled cell, you may use a CellStyleSelector. 
Considering the usage of RowLoaded event, you may do something similar to:

Indeed, when the virtualization of the grid is turned on (which is by default), only the visible visual elements will be created. That is why it is not recommended to work with those visual elements and their values as they will be recycled and reused. Switching off the virtualization, on the other hand, may lead to some performance degradation if you handle a lot of data.
Thus I would recommend you to follow the approach with using IsReadOnlyBinding. Let me know if you need any further assistance.

Generally, the recommended approach is to work with the underlying data item, not with the visual elements. Thus, instead of finding all the columns and the corresponding cells, you may get the properties for each items and get their values.

You may get a particular item as follows:

The UniqueName property of the column will correspond (unless being set differently) to the name of the corresponding property from the business object.
 

Can you please provide sample code demonstrating use of isreadonly binding in c#