Executes the query, and returns the first column of the first row in the result set returned by the query. Additional columns or rows are ignored.
Assembly: System.Data (in System.Data.dll)
An exception occurred while executing the command against a locked row. This exception is not generated when you are using Microsoft .NET Framework version 1.0.
A timeout occurred during a streaming operation. For more information about streaming, see SqlClient Streaming Support.
Use the method to retrieve a single value (for example, an aggregate value) from a database. This requires less code than using the ExecuteReader method, and then performing the operations that you need to generate the single value using the data returned by a SqlDataReader.
A typical query can be formatted as in the following C# example:
cmd.CommandText = "SELECT COUNT(*) FROM dbo.region"; Int32 count = (Int32) cmd.ExecuteScalar();
The following example creates a SqlCommand and then executes it using . The example is passed a string representing a new value to be inserted into a table, and a string to use to connect to the data source. The function returns the new Identity column value if a new row was inserted, 0 on failure.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.