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DbCommand.ExecuteScalar Method

Executes the query and returns the first column of the first row in the result set returned by the query. All other columns and rows are ignored.

Namespace: System.Data.Common
Assembly: System.Data (in system.data.dll)

public abstract Object ExecuteScalar ()
public abstract Object ExecuteScalar ()
public abstract function ExecuteScalar () : Object
Not applicable.

Return Value

The first column of the first row in the result set.

Use the ExecuteScalar method to retrieve a single value (for example, an aggregate value) from a database. This requires less code than using the ExecuteReader method and performing the operations necessary to generate the single value using the data returned by a DbDataReader.

Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0

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