/
DataReaderExtensions.cs
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/
DataReaderExtensions.cs
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namespace Serenity.Data;
/// <summary>
/// Extension methods for IDataReader objects.</summary>
public static class DataReaderExtensions
{
/// <summary>
/// Reads value at field index. Returns DbNull as Null.DateTime.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.DateTime if value is DbNull.</returns>
public static DateTime? AsDateTime(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetDateTime(index);
}
/// <summary>
/// Reads and converts value at field index to DateTime. Returns DbNull as Null.DateTime.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.DateTime if value is DbNull.</returns>
public static DateTime? ToDateTime(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return Convert.ToDateTime(reader.GetValue(index));
}
/// <summary>
/// Reads value at field index. Returns DbNull as Null.Decimal.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Decimal if value is DbNull.</returns>
public static decimal? AsDecimal(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetDecimal(index);
}
/// <summary>
/// Reads and converts value at field index to Decimal. Returns DbNull as Null.Decimal.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Decimal if value is DbNull.</returns>
public static decimal? ToDecimal(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return Convert.ToDecimal(reader.GetValue(index));
}
/// <summary>
/// Reads value at field index. Returns DbNull as Null.Double.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Double if value is DbNull.</returns>
public static double? AsDouble(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetDouble(index);
}
/// <summary>
/// Reads and converts value at field index to Double. Returns DbNull as Null.Double.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Double if value is DbNull.</returns>
public static double? ToDouble(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return Convert.ToDouble(reader.GetValue(index));
}
/// <summary>
/// Reads value at field index. Returns DbNull as Null.Int32.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Int32 if value is DbNull.</returns>
public static int? AsInt32(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetInt32(index);
}
/// <summary>
/// Reads and converts value at field index to Int32. Returns DbNull as Null.Int32.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Int32 if value is DbNull.</returns>
public static int? ToInt32(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return Convert.ToInt32(reader.GetValue(index));
}
/// <summary>
/// Reads value at field index. Returns DbNull as Null.Int64.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Int64 if value is DbNull.</returns>
public static long? AsInt64(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetInt64(index);
}
/// <summary>
/// Reads and converts value at field index to Int64. Returns DbNull as Null.Int64.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or Null.Int64 if value is DbNull.</returns>
public static long? ToInt64(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return Convert.ToInt64(reader.GetValue(index));
}
/// <summary>
/// Reads value at field index. Returns DbNull as null.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or null if value is DbNull.</returns>
public static string AsString(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return reader.GetString(index);
}
/// <summary>
/// Reads and converts value at field index to String. Returns DbNull as null.</summary>
/// <param name="reader">
/// Reader (required).</param>
/// <param name="index">
/// Index.</param>
/// <returns>
/// Field value or null if value is DbNull.</returns>
public static string ToString(this IDataReader reader, int index)
{
if (reader.IsDBNull(index))
return null;
return Convert.ToString(reader.GetValue(index));
}
}