DataRow.RejectChanges Method

Definition

Namespace:

System.Data

Assemblies:

netstandard.dll, System.Data.Common.dll

Source:

DataRow.cs

Rejects all changes made to the row since AcceptChanges() was last called.

C#

public void RejectChanges();

Exceptions

RowNotInTableException

The row does not belong to the table.

Examples

The following example creates a simple DataTable with 2 columns and 10 rows. After several DataRow items are deleted with the Delete method, one of the rows is undeleted by invoking RejectChanges.

C#

private void DemonstrateDeleteRow()
{
    // Create a simple DataTable with two columns and ten rows.
    DataTable table = new DataTable("table");
    DataColumn idColumn = new DataColumn("id",
        Type.GetType("System.Int32"));
    idColumn.AutoIncrement=true;
    DataColumn itemColumn = new DataColumn("item",
        Type.GetType("System.String"));
    table.Columns.Add(idColumn);
    table.Columns.Add(itemColumn);

    // Add ten rows.
    DataRow newRow;

    for(int i = 0; i <10; i++)
    {
        newRow = table.NewRow();
        newRow["item"] = "Item " + i;
        table.Rows.Add(newRow);
    }
    table.AcceptChanges();

    DataRowCollection itemColumns = table.Rows;
    itemColumns[0].Delete();
    itemColumns[2].Delete();
    itemColumns[3].Delete();
    itemColumns[5].Delete();
    Console.WriteLine(itemColumns[3].RowState.ToString());

    // Reject changes on one deletion.
    itemColumns[3].RejectChanges();

    // Change the value of the column so it stands out.
    itemColumns[3]["item"] = "Deleted, Undeleted, Edited";

    // Accept changes on others.
    table.AcceptChanges();

    // Print the remaining row values.
    foreach(DataRow row in table.Rows)
    {
        Console.WriteLine(row[0] + "\table" + row[1]);
    }
}

Remarks

When you call the RejectChanges method, the CancelEdit method is implicitly called to cancel any edits. If RowState is deleted or modified, the row reverts to its previous values, and RowState becomes unchanged. If the RowState is added, the row is removed.

Applies to

See also

• AcceptChanges()
• IsNull(Int32)