本文整理匯總了C#中Npgsql.NpgsqlConnection.BeginTextImport方法的典型用法代碼示例。如果您正苦於以下問題：C# NpgsqlConnection.BeginTextImport方法的具體用法？C# NpgsqlConnection.BeginTextImport怎麽用？C# NpgsqlConnection.BeginTextImport使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類Npgsql.NpgsqlConnection的用法示例。
在下文中一共展示了NpgsqlConnection.BeginTextImport方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C#代碼示例。
示例1: CancelTextImport
public void CancelTextImport()
{
using (var conn = new NpgsqlConnection(ConnectionString))
{
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
var writer = (NpgsqlCopyTextWriter)conn.BeginTextImport("COPY data (field_text, field_int4) FROM STDIN");
writer.Write("HELLO\t1\n");
writer.Cancel();
Assert.That(ExecuteScalar(@"SELECT COUNT(*) FROM data", conn), Is.EqualTo(0));
}
}示例2: Insert
public void Insert(IEnumerable items, string tableName, Action<long> notifyRowsCopied = null,
Action<Exception> onError = null)
{
var targetMethod = typeof (ObjectReader).GetMethod("Create", BindingFlags.Static | BindingFlags.Public);
var targetGenericMethod = targetMethod.MakeGenericMethod(new Type[] {_type});
var castMethod = typeof (Enumerable).GetMethod("Cast", BindingFlags.Static | BindingFlags.Public);
var castGenericMethod = castMethod.MakeGenericMethod(new Type[] {_type});
var destinationColumnsString =
ColumnMappings.GetSqlBulkInsertMappings()
.Select(x => x.DestinationColumn)
.Aggregate((a, b) => a + "," + b);
var sourceColumnsArray = ColumnMappings.GetSqlBulkInsertMappings().Select(x => x.SourceColumn).ToArray();
var objectReader = (ObjectReader) targetGenericMethod.Invoke(null,
new[] {castGenericMethod.Invoke(null, new[] {items}), sourceColumnsArray});
using (var connection = new NpgsqlConnection(_connectionString))
{
try
{
connection.Open();
}
catch (Exception x)
{
Log.Error(x);
if (onError == null) throw;
onError(x);
}
var copyCommand = string.Format(CultureInfo.InvariantCulture, "COPY {0}({1}) FROM STDIN WITH CSV", tableName,
destinationColumnsString);
using (var writer = connection.BeginTextImport(copyCommand))
{
Log.DebugFormat("Starting bulk insert into '{0}'", tableName);
try
{
var row = 0;
IDataReader reader = objectReader as IDataReader;
while (reader.Read())
{
for (var i = 0; i < reader.FieldCount; i++)
{
if (i > 0)
writer.Write(CsvDelimiter);
object value = reader.GetValue(i);
if (value != null)
{
writer.Write(CsvQuote);
writer.Write(_csvRegex.Replace(value.ToString(), CsvReplacement));
writer.Write(CsvQuote);
}
}
writer.WriteLine();
row++;
if (row%NotifyAfter == 0)
{
if (notifyRowsCopied != null)
{
notifyRowsCopied(row);
}
}
}
writer.Flush();
}
catch (Exception x)
{
Log.ErrorFormat("Error bulk inserting", x);
if (onError == null) throw;
onError(x);
}
}
}
}示例3: CloseDuringCopy
public void CloseDuringCopy()
{
// TODO: Check no broken connections were returned to the pool
using (var conn = new NpgsqlConnection(ConnectionString)) {
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
conn.BeginBinaryImport("COPY data (field_text, field_int4) FROM STDIN BINARY");
}
using (var conn = new NpgsqlConnection(ConnectionString)) {
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
conn.BeginBinaryExport("COPY data (field_text, field_int2) TO STDIN BINARY");
}
using (var conn = new NpgsqlConnection(ConnectionString)) {
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
conn.BeginRawBinaryCopy("COPY data (field_text, field_int4) FROM STDIN BINARY");
}
using (var conn = new NpgsqlConnection(ConnectionString)) {
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
conn.BeginRawBinaryCopy("COPY data (field_text, field_int4) TO STDIN BINARY");
}
using (var conn = new NpgsqlConnection(ConnectionString)) {
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
conn.BeginTextImport("COPY data (field_text, field_int4) FROM STDIN");
}
using (var conn = new NpgsqlConnection(ConnectionString)) {
conn.Open();
ExecuteNonQuery("CREATE TEMP TABLE data (field_text TEXT, field_int2 SMALLINT, field_int4 INTEGER)", conn);
conn.BeginTextExport("COPY data (field_text, field_int4) TO STDIN");
}
}