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    Class PathHandler

    A type handler for the PostgreSQL path data type.

    Inheritance
    Object
    NpgsqlTypeHandler
    NpgsqlTypeHandler<NpgsqlPath>
    PathHandler
    Implements
    INpgsqlTypeHandler<NpgsqlPath>
    Inherited Members
    NpgsqlTypeHandler<NpgsqlPath>.ReadAsObject(NpgsqlReadBuffer, Int32, Boolean, FieldDescription)
    NpgsqlTypeHandler<NpgsqlPath>.GetFieldType(FieldDescription)
    NpgsqlTypeHandler<NpgsqlPath>.GetProviderSpecificFieldType(FieldDescription)
    NpgsqlTypeHandler<NpgsqlPath>.CreateArrayHandler(PostgresArrayType, ArrayNullabilityMode)
    NpgsqlTypeHandler<NpgsqlPath>.CreateRangeHandler(PostgresType)
    NpgsqlTypeHandler<NpgsqlPath>.CreateMultirangeHandler(PostgresMultirangeType)
    NpgsqlTypeHandler.PostgresType
    NpgsqlTypeHandler.Read<TAny>(NpgsqlReadBuffer, Int32, Boolean, FieldDescription)
    NpgsqlTypeHandler.Read<TAny>(NpgsqlReadBuffer, Int32, FieldDescription)
    NpgsqlTypeHandler.ReadCustom<TAny>(NpgsqlReadBuffer, Int32, Boolean, FieldDescription)
    NpgsqlTypeHandler.ValidateAndGetLength<TAny>(TAny, NpgsqlLengthCache, NpgsqlParameter)
    NpgsqlTypeHandler.ValidateAndGetLengthCustom<TAny>(TAny, NpgsqlLengthCache, NpgsqlParameter)
    NpgsqlTypeHandler.WriteWithLength<TAny>(TAny, NpgsqlWriteBuffer, NpgsqlLengthCache, NpgsqlParameter, Boolean, CancellationToken)
    NpgsqlTypeHandler.WriteWithLengthCustom<TAny>(TAny, NpgsqlWriteBuffer, NpgsqlLengthCache, NpgsqlParameter, Boolean, CancellationToken)
    NpgsqlTypeHandler.ValidateObjectAndGetLength(Object, NpgsqlLengthCache, NpgsqlParameter)
    NpgsqlTypeHandler.WriteObjectWithLength(Object, NpgsqlWriteBuffer, NpgsqlLengthCache, NpgsqlParameter, Boolean, CancellationToken)
    NpgsqlTypeHandler.CreateConversionButNoParamException(Type)
    Object.Equals(Object)
    Object.Equals(Object, Object)
    Object.GetHashCode()
    Object.GetType()
    Object.MemberwiseClone()
    Object.ReferenceEquals(Object, Object)
    Object.ToString()
    Namespace: Npgsql.Internal.TypeHandlers.GeometricHandlers
    Assembly: Npgsql.dll
    Syntax
    public class PathHandler : NpgsqlTypeHandler<NpgsqlPath>, INpgsqlTypeHandler<NpgsqlPath>
    Remarks

    See https://www.postgresql.org/docs/current/static/datatype-geometric.html.

    The type handler API allows customizing Npgsql's behavior in powerful ways. However, although it is public, it should be considered somewhat unstable, and may change in breaking ways, including in non-major releases. Use it at your own risk.

    Constructors

    PathHandler(PostgresType)

    Declaration
    public PathHandler(PostgresType pgType)
    Parameters
    Type Name Description
    PostgresType pgType

    Methods

    Read(NpgsqlReadBuffer, Int32, Boolean, FieldDescription)

    Reads a value of type TDefault with the given length from the provided buffer, using either sync or async I/O.

    Declaration
    public override async ValueTask<NpgsqlPath> Read(NpgsqlReadBuffer buf, int len, bool async, FieldDescription fieldDescription = null)
    Parameters
    Type Name Description
    NpgsqlReadBuffer buf

    The buffer from which to read.

    Int32 len

    The byte length of the value. The buffer might not contain the full length, requiring I/O to be performed.

    Boolean async

    If I/O is required to read the full length of the value, whether it should be performed synchronously or asynchronously.

    FieldDescription fieldDescription

    Additional PostgreSQL information about the type, such as the length in varchar(30).

    Returns
    Type Description
    ValueTask<NpgsqlPath>

    The fully-read value.

    Overrides
    Npgsql.Internal.TypeHandling.NpgsqlTypeHandler<NpgsqlTypes.NpgsqlPath>.Read(Npgsql.Internal.NpgsqlReadBuffer, System.Int32, System.Boolean, Npgsql.BackendMessages.FieldDescription)

    ValidateAndGetLength(NpgsqlPath, ref NpgsqlLengthCache, NpgsqlParameter)

    Called to validate and get the length of a value of a generic NpgsqlParameter<T>.

    Declaration
    public override int ValidateAndGetLength(NpgsqlPath value, ref NpgsqlLengthCache lengthCache, NpgsqlParameter parameter)
    Parameters
    Type Name Description
    NpgsqlPath value
    NpgsqlLengthCache lengthCache
    NpgsqlParameter parameter
    Returns
    Type Description
    Int32
    Overrides
    Npgsql.Internal.TypeHandling.NpgsqlTypeHandler<NpgsqlTypes.NpgsqlPath>.ValidateAndGetLength(NpgsqlTypes.NpgsqlPath, Npgsql.Internal.TypeHandling.NpgsqlLengthCache, Npgsql.NpgsqlParameter)

    Write(NpgsqlPath, NpgsqlWriteBuffer, NpgsqlLengthCache, NpgsqlParameter, Boolean, CancellationToken)

    Called to write the value of a generic NpgsqlParameter<T>.

    Declaration
    public override async Task Write(NpgsqlPath value, NpgsqlWriteBuffer buf, NpgsqlLengthCache lengthCache, NpgsqlParameter parameter, bool async, CancellationToken cancellationToken = default(CancellationToken))
    Parameters
    Type Name Description
    NpgsqlPath value
    NpgsqlWriteBuffer buf
    NpgsqlLengthCache lengthCache
    NpgsqlParameter parameter
    Boolean async
    CancellationToken cancellationToken
    Returns
    Type Description
    Task
    Overrides
    Npgsql.Internal.TypeHandling.NpgsqlTypeHandler<NpgsqlTypes.NpgsqlPath>.Write(NpgsqlTypes.NpgsqlPath, Npgsql.Internal.NpgsqlWriteBuffer, Npgsql.Internal.TypeHandling.NpgsqlLengthCache, Npgsql.NpgsqlParameter, System.Boolean, System.Threading.CancellationToken)

    Implements

    INpgsqlTypeHandler<T>
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