Hello Rashford,

To allow editing only in specific columns, you can use the CellActivation property for each column. Set this property to Activation.AllowEdit for columns you want to be editable and Activation.NoEdit for those you want to keep read-only. Below you can find a code snippet demonstrating this:

// Access the UltraGridColumn
UltraGridColumn column = ultraGrid.DisplayLayout.Bands[0].Columns["YourColumnName"];

// Allow editing for this column
column.CellActivation = Activation.AllowEdit;

// Disable editing for another column
ultraGrid.DisplayLayout.Bands[0].Columns["AnotherColumnName"].CellActivation = Activation.NoEdit;

You can assign different editors (like dropdowns, date pickers) to specific columns using EditorComponent or by setting the column's Style property.

For a dropdown (using ValueList): You can use a ValueList for dropdown values in a column:

// Create a ValueList
ValueList valueList = new ValueList();
valueList.ValueListItems.Add("Option1", "DisplayText1");
valueList.ValueListItems.Add("Option2", "DisplayText2");

// Assign the ValueList to the column
ultraGrid.DisplayLayout.Bands[0].Columns["YourDropdownColumn"].ValueList = valueList;

For a date picker: You can set the Style of the column to Date:

ultraGrid.DisplayLayout.Bands[0].Columns["DateColumn"].Style = Infragistics.Win.UltraWinGrid.ColumnStyle.Date;

For numeric input:

ultraGrid.DisplayLayout.Bands[0].Columns["NumericColumn"].Style = Infragistics.Win.UltraWinGrid.ColumnStyle.Integer;

Regarding validating the data of a cell, you can handle the BeforeCellUpdate or BeforeRowUpdate events to validate the data before committing it, below I am sharing a code snippet that demonstrates it:

private void ultraGrid_BeforeCellUpdate(object sender, BeforeCellUpdateEventArgs e)
{
    // Get the column being edited
    UltraGridColumn column = e.Cell.Column;
    
    // Validate input for a specific column
    if (column.Key == "YourColumnName")
    {
        if (!IsValidInput(e.NewValue))
        {
            // Cancel the update if validation fails
            e.Cancel = true;
            MessageBox.Show("Invalid input!");
        }
    }
}

// Sample validation method
private bool IsValidInput(object value)
{
    // Add your validation logic here
    return value != null && value.ToString().Length > 0;
}

Please let me know if you need any further assistance.

Regards,
Ivan Kitanov