What's the use of BeginEdit/EndEdit when used with a datarow

Question

1.What's the use of BeginEdit/EndEdit when used with a datarow 2. When a datarow variable needs to be created e.g. DataRow dr=new DataRow(); It gives the error:No overload for method 'DataRow' takes '0' arguments Why such error. If I simply use Datarow dr then no error. 3. Will the find method work on table having primary key? I mean if there is no primary key then how to find the record? 4. When I write DataRow dr; int aa=Int32.Parse(textBox1.Text); dr=ds.Tables[0].Rows.Find(aa); It gives run time error that table has no primary key though it is present. 5. What's the syntax to retrieve a particular value of a field of a row using datarow.

Bloopy · Answer

1.What's the use of BeginEdit/EndEdit when used with a datarow It makes it so that when you edit the data in between the constraints aren't checked. Instead the constraints get checked after EndEdit which can speed up your program. 5. What's the syntax to retrieve a particular value of a field of a row using datarow. Example: System.Data.DataRow dr = new DataRow(); /* add some data */ Object something = dr.ItemArray[5] // this will give you the value in the row under the column with index 5