SqlParameter.Precision Property

Gets or sets the maximum number of digits used to represent the Value property.

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

public byte Precision { get; set; }
/** @property */
public final byte get_Precision ()

/** @property */
public final void set_Precision (byte value)

public final function get Precision () : byte

public final function set Precision (value : byte)

Not applicable.

Property Value

The maximum number of digits used to represent the Value property. The default value is 0. This indicates that the data provider sets the precision for Value.

The Precision property is used by parameters that have a SqlDbType of Decimal.

You do not need to specify values for the Precision and Scale properties for input parameters, as they can be inferred from the parameter value. Precision and Scale are required for output parameters and for scenarios where you need to specify complete metadata for a parameter without indicating a value, such as specifying a null value with a specific precision and scale.


Use of this property to coerce data passed to the database is not supported. To round, truncate, or otherwise coerce data before passing it to the database, use the Math class that is part of the System namespace prior to assigning a value to the parameter's Value property.


  Microsoft .NET Framework data providers that are included with the .NET Framework version 1.0 do not verify the Precision or Scale of Decimal parameter values. This can cause truncated data being inserted at the data source. If you are using .NET Framework version 1.0, validate the Precision and Scale of Decimal values before setting the parameter value. When you use .NET Framework version 1.1 or a later version, an exception is thrown if a Decimal parameter value is set with an invalid Precision. Scale values that exceed the Decimal parameter scale are still truncated.

The following example creates a SqlParameter and sets some of its properties.

private static void AddSqlParameter(SqlCommand command)
    SqlParameter parameter = new SqlParameter("@Price", SqlDbType.Decimal);
    parameter.Value = 3.1416;
    parameter.Precision = 8;
    parameter.Scale = 4;


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, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0

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