Select Method (String, String, DataViewRowState)

DataTable.Select Method (String, String, DataViewRowState)

Gets an array of all DataRow objects that match the filter in the order of the sort that match the specified state.

Namespace:  System.Data
Assembly:  System.Data (in System.Data.dll)

public DataRow[] Select(
	string filterExpression,
	string sort,
	DataViewRowState recordStates


Type: System.String

The criteria to use to filter the rows.

Type: System.String

A string specifying the column and sort direction.

Type: System.Data.DataViewRowState

One of the DataViewRowState values.

Return Value

Type: System.Data.DataRow[]
An array of DataRow objects.

To form the filterExpression argument, use the same rules for creating the DataColumn class's Expression property value. The Sort argument also uses the same rules for creating class's Expression strings.

The following example uses a filter expression and record state to return an array of DataRow objects.

    private static void GetRowsByFilter()
        DataTable customerTable = new DataTable("Customers");
        // Add columns
        customerTable.Columns.Add("id", typeof(int));
        customerTable.Columns.Add("name", typeof(string));

        // Set PrimaryKey
        customerTable.Columns[ "id" ].Unique = true;
        customerTable.PrimaryKey = new DataColumn[] 
            { customerTable.Columns["id"] };

        // Add ten rows 
        for(int id=1; id<=10; id++)
                new object[] { id, string.Format("customer{0}", id) });

        // Add another ten rows 
        for(int id=11; id<=20; id++)
                new object[] { id, string.Format("customer{0}", id) });

        string expression;
        string sortOrder;
        expression = "id > 5";
        // Sort descending by column named CompanyName.
        sortOrder = "name DESC";
        // Use the Select method to find all rows matching the filter.
        DataRow[] foundRows = 
            customerTable.Select(expression, sortOrder, 
        PrintRows(foundRows, "filtered rows");

        foundRows = customerTable.Select();
        PrintRows(foundRows, "all rows");

    private static void PrintRows(DataRow[] rows, string label)
        Console.WriteLine("\n{0}", label);
        if(rows.Length <= 0)
            Console.WriteLine("no rows found");
        foreach(DataRow row in rows)
            foreach(DataColumn column in row.Table.Columns)
                Console.Write("\table {0}", row[column]);

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0

XNA Framework

Supported in: 3.0, 2.0, 1.0

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