Tài liệu The DataRow Class doc

Table 11.4: DataRow PROPERTIES PROPERTY TYPE DESCRIPTION HasErrors bool Returns a bool value that indicates whether any of the DataColumn objects in the DataRow have errors.. ItemArray

The DataRow Class

You use an object of the DataRow class to represent a row You can also store multiple DataRow objects in a DataTable Table 11.4 shows some of the DataRow properties

Table 11.4: DataRow PROPERTIES

PROPERTY TYPE DESCRIPTION

HasErrors bool Returns a bool value that indicates whether any of the

DataColumn objects in the DataRow have errors

ItemArray object[] Gets or sets all the DataColumn objects in the DataRow RowState DataRowState Gets the current state of the DataRow The state can be

Added, Deleted, Detached~FT, Modified, or Unchanged The state depends in the operation performed on the DataRow and whether the AcceptChanges() method has been called to commit the changes

Table DataTable Gets the DataTable object to which the DataRow belongs

The row has been created but isn't part of a DataRowCollection object; a DataRow is in this state immediately after it has been created and before it is added to a collection, or if

it has been removed from a collection.

Table 11.5: DataRow METHODS

TYPE

DESCRIPTION

AcceptChanges() void Commits all the changes made to the DataRow

object since it was loaded or since the last time the AcceptChanges() method was called

BeginEdit() void Starts an edit for the DataRow object

CancelEdit() void Cancels an edit for the DataRow object and

restores it to the original state

ClearErrors() void Clears any errors for the DataRow object

Delete() void Deletes the DataRow object

EndEdit() void Stops an edit for the DataRow object and commits

the change

GetChildRows() DataRow[] Overloaded Returns an array of DataRow objects

Table 11.5: DataRow METHODS

TYPE

DESCRIPTION

that contain the child rows using the specified DataRelation object

GetColumnError() string Overloaded Returns the description of the error

for the specified DataColumn object

GetColumnsInError() DataColumn[] Returns an array of DataColumn objects that have

errors

GetParentRow() DataRow Overloaded Returns a DataRow object that

contains the parent row using the specified DataRelation object

GetParentRows() DataRow[] Overloaded Returns an array of DataRow objects

that contain the parent rows using the specified DataRelation object

IsNull() bool Overloaded Returns a bool value that indicates

whether the specified DataColumn object contains

a null value

RejectChanges() void Undoes all changes made to the DataRow object

since the AcceptChanges() method was called SetNull() void Sets the specified DataColumn object to a null

value

SetParentRow() void Overloaded Sets the parent row to the specified

DataRow object