本文整理汇总了C#中Npgsql.NpgsqlConnector.StartUserAction方法的典型用法代码示例。如果您正苦于以下问题：C# NpgsqlConnector.StartUserAction方法的具体用法？C# NpgsqlConnector.StartUserAction怎么用？C# NpgsqlConnector.StartUserAction使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Npgsql.NpgsqlConnector的用法示例。
在下文中一共展示了NpgsqlConnector.StartUserAction方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: DeallocatePrepared
void DeallocatePrepared()
{
if (!IsPrepared)
return;
_connector = CheckReadyAndGetConnector();
using (_connector.StartUserAction())
{
_writeStatementIndex = 0;
Send(PopulateDeallocate);
for (var i = 0; i < _statements.Count; i++)
_connector.ReadExpecting<CloseCompletedMessage>();
_connector.ReadExpecting<ReadyForQueryMessage>();
IsPrepared = false;
}
}示例2: Prepare
/// <summary>
/// Creates a prepared version of the command on a PostgreSQL server.
/// </summary>
public override void Prepare()
{
Prechecks();
if (Parameters.Any(p => !p.IsTypeExplicitlySet)) {
throw new InvalidOperationException("NpgsqlCommand.Prepare method requires all parameters to have an explicitly set type.");
}
_connector = Connection.Connector;
Log.Debug("Prepare command", _connector.Id);
using (_connector.StartUserAction())
{
DeallocatePrepared();
ProcessRawQuery();
for (var i = 0; i < _queries.Count; i++)
{
var query = _queries[i];
ParseMessage parseMessage;
DescribeMessage describeMessage;
if (i == 0)
{
parseMessage = _connector.ParseMessage;
describeMessage = _connector.DescribeMessage;
}
else
{
parseMessage = new ParseMessage();
describeMessage = new DescribeMessage();
}
query.PreparedStatementName = _connector.NextPreparedStatementName();
_connector.AddMessage(parseMessage.Populate(query, _connector.TypeHandlerRegistry));
_connector.AddMessage(describeMessage.Populate(StatementOrPortal.Statement,
query.PreparedStatementName));
}
_connector.AddMessage(SyncMessage.Instance);
_connector.SendAllMessages();
_queryIndex = 0;
while (true)
{
var msg = _connector.ReadSingleMessage();
switch (msg.Code)
{
case BackendMessageCode.CompletedResponse: // prepended messages, e.g. begin transaction
case BackendMessageCode.ParseComplete:
case BackendMessageCode.ParameterDescription:
continue;
case BackendMessageCode.RowDescription:
var description = (RowDescriptionMessage) msg;
FixupRowDescription(description, _queryIndex == 0);
_queries[_queryIndex++].Description = description;
continue;
case BackendMessageCode.NoData:
_queries[_queryIndex++].Description = null;
continue;
case BackendMessageCode.ReadyForQuery:
Contract.Assume(_queryIndex == _queries.Count);
IsPrepared = true;
return;
default:
throw _connector.UnexpectedMessageReceived(msg.Code);
}
}
}
}示例3: Prepare
/// <summary>
/// Creates a prepared version of the command on a PostgreSQL server.
/// </summary>
public override void Prepare()
{
_connector = CheckReadyAndGetConnector();
if (Parameters.Any(p => !p.IsTypeExplicitlySet))
throw new InvalidOperationException("The Prepare method requires all parameters to have an explicitly set type.");
Log.Debug("Preparing: " + CommandText, _connector.Id);
using (_connector.StartUserAction())
{
DeallocatePrepared();
ProcessRawQuery();
_sendState = SendState.Start;
_writeStatementIndex = 0;
Send(PopulatePrepare);
_readStatementIndex = 0;
while (true)
{
var msg = _connector.ReadMessage(DataRowLoadingMode.NonSequential);
switch (msg.Code)
{
case BackendMessageCode.CompletedResponse: // prepended messages, e.g. begin transaction
case BackendMessageCode.ParseComplete:
case BackendMessageCode.ParameterDescription:
continue;
case BackendMessageCode.RowDescription:
var description = (RowDescriptionMessage) msg;
FixupRowDescription(description, _readStatementIndex == 0);
_statements[_readStatementIndex++].Description = description;
continue;
case BackendMessageCode.NoData:
_statements[_readStatementIndex++].Description = null;
continue;
case BackendMessageCode.ReadyForQuery:
Contract.Assume(_readStatementIndex == _statements.Count);
IsPrepared = true;
return;
default:
throw _connector.UnexpectedMessageReceived(msg.Code);
}
}
}
}