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Copying Rows from One DataTable to Another

[ Team LiB ] Recipe 5.1 Copying Rows from One DataTable to Another Problem You have records in a DataTable that you need to copy to another DataTable. Solution Use the ImportRow( ) method of the DataTable to copy DataRow objects from one DataTable to another. | Team LiB Recipe 5.1 Copying Rows from One DataTable to Another Problem You have records in a DataTable that you need to copy to another DataTable. Solution Use the ImportRow method of the DataTable to copy DataRow objects from one DataTable to another. Three techniques for selecting records to copy are demonstrated in the following example Use the Rows property to access rows in the DataRowCollection of the DataTable using the row index. Use the Select method of the DataTable. Use the RowFilter property of a DataView for the DataTable. The sample code creates a source DataTable containing the Orders table from Northwind. A second empty target DataTable is created with the same schema. One of the three techniques as specified by the user is used to copy records from the source table to the target table. The C code is shown in Example 5-1. Example 5-1. File CopyRowsBetweenTablesForm.es Namespaces variables and constants using System using System.Configuration using System.Data using System.Data.SqlClient Table name constants private const String ORDERS_TABLE Orders Field name constants private const String ORDERID_FIELD OrderlD . . . Fill the source table with schema and data. SqlDataAdapter da new SqlDataAdapter SELECT FROM Orders ConfigurationSettings.AppSettings Sql_ConnectString DataTable dt new DataTable ORDERS_TABLE da.FillSchema dt SchemaType.Source da.Fill dt Clone the schema to the copy table. DataTable dtCopy dt.Clone if rowRadioButton.Checked Use ImportRow method to import the first three rows. for int i 0 i 3 i dtCopy.ImportRow dt.Rows i else if selectRadioButton.Checked Copy using result of Select method. foreach DataRow row in dt.Select ORDERID_FIELD 10300 dtCopy.ImportRow row else if filteredDataViewRadioButton.Checked Copy using result of filtered DataView. DataView categoryView dt.DefaultView categoryView.RowFilter ORDERID_FIELD 10300 AND ORDERID_FIELD 10400 for int i 0 i categoryView.Count i dtCopy.ImportRow categoryView i .Row Bind the default .