Is there a way to use sql bulk insert without using datatable from generic list? - datatable

Question

I have a generic list contains about six and a half million. I would like to insert this generic list to database by using sql bulk insert. But a datatable is necessary for using sql bulk insert. Convert generic list to datatable takes too much time. So how can I use sql bulk insert without using datatable ?
EDIT:
I use MSSQL SERVER and .NET FrameWork
I would like to just use it with a generic list.

Answer 1

I created a custom datareader that have been inherited IDataReader. I have achieved like below :
public class CustomDataReader<T> : IDataReader
{
private readonly IEnumerator<T> list;
private readonly List<PropertyInfo> properties = new List<PropertyInfo>();
public CustomDataReader(IEnumerable<T> list)
{
this.list = list.GetEnumerator();
var props = typeof(T).GetProperties();
foreach (var propertyInfo in props)
{
properties.Add(propertyInfo);
}
}
#region IDataReader Members
public void Close()
{
list.Dispose();
}
public int Depth
{
get { throw new NotImplementedException(); }
}
public DataTable GetSchemaTable()
{
throw new NotImplementedException();
}
public bool IsClosed
{
get { throw new NotImplementedException(); }
}
public bool NextResult()
{
throw new NotImplementedException();
}
public bool Read()
{
return list.MoveNext();
}
public int RecordsAffected
{
get { throw new NotImplementedException(); }
}
#endregion
#region IDisposable Members
public void Dispose()
{
Close();
}
#endregion
#region IDataRecord Members
public int FieldCount
{
get { return properties.Count; }
}
public bool GetBoolean(int i)
{
throw new NotImplementedException();
}
public byte GetByte(int i)
{
throw new NotImplementedException();
}
public long GetBytes(int i, long fieldOffset, byte[] buffer, int bufferoffset, int length)
{
throw new NotImplementedException();
}
public char GetChar(int i)
{
throw new NotImplementedException();
}
public long GetChars(int i, long fieldoffset, char[] buffer, int bufferoffset, int length)
{
throw new NotImplementedException();
}
public IDataReader GetData(int i)
{
throw new NotImplementedException();
}
public string GetDataTypeName(int i)
{
throw new NotImplementedException();
}
public DateTime GetDateTime(int i)
{
throw new NotImplementedException();
}
public decimal GetDecimal(int i)
{
throw new NotImplementedException();
}
public double GetDouble(int i)
{
throw new NotImplementedException();
}
public Type GetFieldType(int i)
{
return properties[i].PropertyType;
}
public float GetFloat(int i)
{
throw new NotImplementedException();
}
public Guid GetGuid(int i)
{
throw new NotImplementedException();
}
public short GetInt16(int i)
{
throw new NotImplementedException();
}
public int GetInt32(int i)
{
throw new NotImplementedException();
}
public long GetInt64(int i)
{
throw new NotImplementedException();
}
public string GetName(int i)
{
return properties[i].Name;
}
public int GetOrdinal(string name)
{
throw new NotImplementedException();
}
public string GetString(int i)
{
throw new NotImplementedException();
}
public object GetValue(int i)
{
return properties[i].GetValue(list.Current, null);
}
public int GetValues(object[] values)
{
throw new NotImplementedException();
}
public bool IsDBNull(int i)
{
throw new NotImplementedException();
}
public object this[string name]
{
get { throw new NotImplementedException(); }
}
public object this[int i]
{
get { throw new NotImplementedException(); }
}
#endregion
}
public static void BulkInsert<T>(this IEnumerable<T> list, string connStr, string tableName)
{
using (var reader = new CustomDataReader<T>(list))
{
using (var conn = new SqlConnection(connStr))
{
using (var sbc = new SqlBulkCopy(conn))
{
conn.Open();
sbc.DestinationTableName = tableName;
sbc.WriteToServer(reader);
conn.Close();
}
}
}
}