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# NpgsqlParameter Properties

The properties of the NpgsqlParameter class are listed below. For a complete list of NpgsqlParameter class members, see the NpgsqlParameter Members topic.

#### Public Instance Properties

DbType | Gets or sets the DbType of the parameter.
Direction | Gets or sets a value indicating whether the parameter is input-only, output-only, bidirectional, or a stored procedure return value parameter.
IsNullable | Gets or sets a value indicating whether the parameter accepts null values.
NpgsqlDbType | Gets or sets the DbType of the parameter.
ParameterName | Gets or sets the name of the NpgsqlParameter.
Precision | Gets or sets the maximum number of digits used to represent the Value property.
Scale | Gets or sets the number of decimal places to which Value is resolved.
Size | Gets or sets the maximum size, in bytes, of the data within the column.
SourceColumn | Gets or sets the name of the source column that is mapped to the DataSet and used for loading or returning the Value.
SourceVersion | Gets or sets the DataRowVersion to use when loading Value.
Value | Gets or sets the value of the parameter.

#### See Also

NpgsqlParameter Class | Npgsql Namespace