Hello, Vivek,
The Narrator will read the specified NullValue property for the column:
this.radGridView1.Rows[0].Cells["Description"].Value = DBNull.Value;
this.radGridView1.Rows[2].Cells["Description"].Value = null;
this.radGridView1.Columns["Description"].NullValue = "Empty";
I hope that it would be suitable for your requirements.
Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik