private static QueryToFileResult InternalQueryToFile(SqlConnection dbConnection, Stream stream, QueryToFileOptions options, string sqlText, object[] parameters = null)
{
int dataRowCount = 0;
int totalRowCount = 0;
long bytesWritten = 0;
//Open datbase connection
if (dbConnection.State == ConnectionState.Closed)
{
dbConnection.Open();
}
var command = new SqlCommand(sqlText, dbConnection);
if (parameters != null)
{
command.Parameters.AddRange(parameters);
}
if (options.CommandTimeout.HasValue)
{
command.CommandTimeout = options.CommandTimeout.Value;
}
StreamWriter streamWriter = new StreamWriter(stream);
using (var reader = command.ExecuteReader())
{
//Header row
if (options.IncludeHeaderRow)
{
for (int i = 0; i < reader.FieldCount; i++)
{
streamWriter.Write(options.TextQualifer);
streamWriter.Write(reader.GetName(i));
streamWriter.Write(options.TextQualifer);
if (i != reader.FieldCount - 1)
{
streamWriter.Write(options.ColumnDelimiter);
}
}
totalRowCount++;
streamWriter.Write(options.RowDelimiter);
}
//Write data rows to file
while (reader.Read())
{
Object[] values = new Object[reader.FieldCount];
reader.GetValues(values);
for (int i = 0; i < values.Length; i++)
{
streamWriter.Write(options.TextQualifer);
streamWriter.Write(values[i]);
streamWriter.Write(options.TextQualifer);
if (i != values.Length - 1)
{
streamWriter.Write(options.ColumnDelimiter);
}
}
streamWriter.Write(options.RowDelimiter);
dataRowCount++;
totalRowCount++;
}
streamWriter.Flush();
bytesWritten = streamWriter.BaseStream.Length;
streamWriter.Close();
}
return(new QueryToFileResult()
{
BytesWritten = bytesWritten,
DataRowCount = dataRowCount,
TotalRowCount = totalRowCount
});
}
private static QueryToFileResult InternalQueryToFile <T>(this IQueryable <T> querable, Stream stream, QueryToFileOptions options)
{
var dbQuery = querable as DbQuery <T>;
var dbConnection = GetSqlConnectionFromIQuerable(querable);
return(InternalQueryToFile(dbConnection, stream, options, dbQuery.Sql));
}
public static QueryToFileResult SqlQueryToCsvFile(this Database database, Stream stream, QueryToFileOptions options, string sqlText, params object[] parameters)
{
var dbConnection = database.Connection as SqlConnection;
return(InternalQueryToFile(dbConnection, stream, options, sqlText, parameters));
}
public static QueryToFileResult SqlQueryToCsvFile(this Database database, string filePath, QueryToFileOptions options, string sqlText, params object[] parameters)
{
var fileStream = File.Create(filePath);
return(SqlQueryToCsvFile(database, fileStream, options, sqlText, parameters));
}
public static QueryToFileResult QueryToCsvFile <T>(this IQueryable <T> querable, Stream stream, QueryToFileOptions options)
{
return(InternalQueryToFile <T>(querable, stream, options));
}
public static QueryToFileResult QueryToCsvFile <T>(this IQueryable <T> querable, String filePath, QueryToFileOptions options)
{
var fileStream = File.Create(filePath);
return(QueryToCsvFile <T>(querable, fileStream, options));
}
