CaseSensitive Property

DataTable.CaseSensitive Property

Indicates whether string comparisons within the table are case-sensitive.

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

public bool CaseSensitive { get; set; }

Property Value

Type: System.Boolean
true if the comparison is case-sensitive; otherwise false. The default is set to the parent DataSet object's CaseSensitive property, or false if the DataTable was created independently of a DataSet.

The CaseSensitive property affects string comparisons in sorting, searching, and filtering.

The following example calls the Select method twice on a DataTable. The first time, the CaseSensitive property is set to false, the second, to true.

private static void ToggleCaseSensitive()
{
    DataTable t;
    DataRow[] foundRows;

    t = CreateDataSet().Tables[0];

    t.CaseSensitive = false;
    foundRows = t.Select("item = 'abc'");

    // Print out DataRow values.
    PrintRowValues(foundRows, "CaseSensitive = False");

    t.CaseSensitive = true;
    foundRows = t.Select("item = 'abc'");

    PrintRowValues(foundRows, "CaseSensitive = True");
}

public static DataSet CreateDataSet()
{
    // Create a DataSet with one table, two columns
    DataSet ds = new DataSet();
    DataTable t = new DataTable("Items");

    // Add table to dataset
    ds.Tables.Add(t);

    // Add two columns
    DataColumn c;

    // First column
    c = t.Columns.Add("id", typeof(int));
    c.AutoIncrement = true;

    // Second column
    t.Columns.Add("item", typeof(string));

    // Set primary key
    t.PrimaryKey = new DataColumn[] { t.Columns["id"] };

    // Add twelve rows 
    for (int i = 0; i < 10; i++)
    {
        t.Rows.Add(new object[] { i, i.ToString() });
    }
    t.Rows.Add(new object[] { 11, "abc" });
    t.Rows.Add(new object[] { 15, "ABC" });

    return ds;
}

private static void PrintRowValues(DataRow[] rows, string label)
{
    Console.WriteLine();
    Console.WriteLine(label);
    if (rows.Length <= 0)
    {
        Console.WriteLine("no rows found");
        return;
    }
    foreach (DataRow r in rows)
    {
        foreach (DataColumn c in r.Table.Columns)
        {
            Console.Write("\t {0}", r[c]);
        }
        Console.WriteLine();
    }
}

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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