ADO.NET in a Nutshell

Name

DataRow

Synopsis

The DataRow class represents a single record in a database. You can access the columns of the record using the indexer, which is also the indexer for the class. You can retrieve or set a column value using a zero-based index or the column name. Using the name is slightly slower because it requires a behind-the-scenes hashtable lookup. The indexer has two overloads that allow you to specify the row version to retrieve using the DataRowVersion enumeration. For example:

Console.Write(row["ID"], DataRowVersion.Original);

retrieves the original data source value, even if it has been modified. If you omit the version, you receive the current (DataRowVersion.Current) value.

Alternatively, you can get or set values for all the rows at one time using the ItemArray property. The ItemArray is a one-dimensional array, in which each item contains the value for a field, in the same order as the DataRow. The ItemArray doesn’t include the names of the field. You can also retrieve the state of the row (indicating if it has been added, deleted, and so on), using the RowState property.

The DataRow allocates space for error information. You can set or retrieve a string that describes an error using the SetColumnError( ) or GetColumnError( ) methods. To determine if the row has any errors, simply inspect the Boolean HasErrors property or retrieve the DataColumn objects with errors using the GetColumnsInError( ) method.

The GetParentRow( ) and GetChildRows( ) methods allow you to retrieve ...