47 lines
1.9 KiB
C#
47 lines
1.9 KiB
C#
using System;
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using System.Data;
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using FruityFoundation.Base.Structures;
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namespace FruityFoundation.Base.Extensions;
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public static class DataReaderExtensions
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{
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public static Maybe<bool> TryGetBoolean(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetBoolean);
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public static Maybe<byte> TryGetByte(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetByte);
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public static Maybe<long> TryGetBytes(this IDataReader reader, int ord, long fieldOffset, byte[]? buffer, int bufferOffset, int length) =>
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TryGet(reader, ord, _ => reader.GetBytes(ord, fieldOffset, buffer, bufferOffset, length));
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public static Maybe<long> TryGetChars(this IDataReader reader, int ord, long fieldOffset, char[]? buffer, int bufferOffset, int length) =>
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TryGet(reader, ord, _ => reader.GetChars(ord, fieldOffset, buffer, bufferOffset, length));
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public static Maybe<DateTime> TryGetDateTime(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetDateTime);
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public static Maybe<decimal> TryGetDecimal(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetDecimal);
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public static Maybe<float> TryGetFloat(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetFloat);
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public static Maybe<Guid> TryGetGuid(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetGuid);
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public static Maybe<short> TryGetInt16(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetInt16);
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public static Maybe<int> TryGetInt32(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetInt32);
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public static Maybe<long> TryGetInt64(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetInt64);
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public static Maybe<string> TryGetString(this IDataReader reader, int ord) =>
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TryGet(reader, ord, reader.GetString);
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private static Maybe<T> TryGet<T>(IDataReader reader, int ord, Func<int, T> valueGetter) =>
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reader.IsDBNull(ord) ? Maybe<T>.Empty() : valueGetter(ord);
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} |