您的位置：首页 > 数据库 > MySQL

mysql connection string for net

2014-04-19 15:30 337 查看

http://dev.mysql.com/doc/connector-net/en/connector-net-connection-options.html

Table 7.1 Connector/Net Connection String Options - General


Name	Default	Description
Allow Batch , AllowBatch	true	When true, multiple SQL statements can be sent with one command execution. Note: starting with MySQL 4.1.1, batch statements should be separated by the server-defined separator character. Statements sent to earlier versions of MySQL should be separated by ';'.
Allow User Variables , AllowUserVariables	false	Setting this to true indicates that the provider expects user variables in the SQL. This option was added in Connector/Net version 5.2.2.
Allow Zero Datetime , AllowZeroDateTime	false	If set to True , MySqlDataReader.GetValue() returns a MySqlDateTime object for date or datetime columns that have disallowed values, such as zero datetime values, and a System.DateTime object for valid values. If set to False (the default setting) it causes a System.DateTime object to be returned for all valid values and an exception to be thrown for disallowed values, such as zero datetime values.
Auto Enlist , AutoEnlist	true	If AutoEnlist is set to true , which is the default, a connection opened using TransactionScope participates in this scope, it commits when the scope commits and rolls back if TransactionScope does not commit. However, this feature is considered security sensitive and therefore cannot be used in a medium trust environment.
BlobAsUTF8ExcludePattern	null	A POSIX-style regular expression that matches the names of BLOB columns that do not contain UTF-8 character data. SeeSection 6.16, “Character Set Considerations for Connector/Net” for usage details.
BlobAsUTF8IncludePattern	null	A POSIX-style regular expression that matches the names of BLOB columns containing UTF-8 character data. SeeSection 6.16, “Character Set Considerations for Connector/Net” for usage details.
Certificate File , CertificateFile	null	This option specifies the path to a certificate file in PKCS #12 format ( .pfx ). For an example of usage, see Section 5.7, “Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1.
Certificate Password , CertificatePassword	null	Specifies a password that is used in conjunction with a certificate specified using the option CertificateFile . For an example of usage, see Section 5.7, “Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1.
Certificate Store Location , CertificateStoreLocation	null	Enables you to access a certificate held in a personal store, rather than use a certificate file and password combination. For an example of usage, see Section 5.7, “Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1.
Certificate Thumbprint , CertificateThumbprint	null	Specifies a certificate thumbprint to ensure correct identification of a certificate contained within a personal store. For an example of usage, see Section 5.7, “Tutorial: Using SSL with MySQL Connector/Net”. Was introduced with 6.2.1.
CharSet , Character Set , CharacterSet		Specifies the character set that should be used to encode all queries sent to the server. Resultsets are still returned in the character set of the result data.
Check Parameters , CheckParameters	true	Indicates if stored routine parameters should be checked against the server.
Command Interceptors , CommandInterceptors		The list of interceptors that can intercept SQL command operations.
Connect Timeout , Connection Timeout , ConnectionTimeout	15	The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error.
Connect_Attrs		Passes a predefined set of key/value pairs containing connection-specific data items to the server, for application-defined purposes. connector/Net automatically transmits the following attributes: _pid , _client_version , _platform , _program_name , _os , _os_details , and _thread . See Performance Schema Connection Attribute Tables for the Performance Schema tables to query on the server side to make use of these attributes.
Convert Zero Datetime , ConvertZeroDateTime	false	True to have MySqlDataReader.GetValue() and MySqlDataReader.GetDateTime() return DateTime.MinValue for date or datetime columns that have disallowed values.
Default Command Timeout , DefaultCommandTimeout	30	Sets the default value of the command timeout to be used. This does not supersede the individual command timeout property on an individual command object. If you set the command timeout property, that will be used. This option was added in Connector/Net 5.1.4
Default Table Cache Age , DefaultTableCacheAge	60	Specifies how long a TableDirect result should be cached, in seconds. For usage information about table caching, seeSection 6.7, “Using Connector/Net with Table Caching”. This option was added in Connector/Net 6.4.
enableSessionExpireCallback	false	When set to true , causes the session-expiry scanner to raise the session_end event before deleting the session data stored in the my_aspnet_sessions table, when a session times out. Enable this option to write additional application-specific cleanup code to handle the session_end event of the global.asax class, before the stored data of the session gets deleted. Within the session_end method, any other required cleanup can be done. This option was added in Connector/Net 6.4.5; it is not yet available in Connector/Net 6.5.x releases.
Encrypt , UseSSL	false	For Connector/Net 5.0.3 and later, when true , SSL encryption is used for all data sent between the client and server if the server has a certificate installed. Recognized values are true , false , yes , and no . In versions before 5.0.3, this option had no effect. From version 6.2.1, this option is deprecated and is replaced by SSL Mode . The option still works if used. If this option is set to true, it is equivalent to SSL Mode = Preferred .
Exception Interceptors , ExceptionInterceptors		The list of interceptors that can triage thrown MySqlException exceptions.
Functions Return String , FunctionsReturnString	false	Causes the connector to return binary/varbinary values as strings, if they do not have a tablename in the metadata.
Host , Server , Data Source , DataSource , Address , Addr , Network Address	localhost	The name or network address of the instance of MySQL to which to connect. Multiple hosts can be specified separated by commas. This can be useful where multiple MySQL servers are configured for replication and you are not concerned about the precise server you are connecting to. No attempt is made by the provider to synchronize writes to the database, so take care when using this option. In Unix environment with Mono, this can be a fully qualified path to a MySQL socket file. With this configuration, the Unix socket is used instead of the TCP/IP socket. Currently, only a single socket name can be given, so accessing MySQL in a replicated environment using Unix sockets is not currently supported.
Ignore Prepare , IgnorePrepare	true	When true, instructs the provider to ignore any calls to MySqlCommand.Prepare() . This option is provided to prevent issues with corruption of the statements when used with server-side prepared statements. If you use server-side prepare statements, set this option to false. This option was added in Connector/Net 5.0.3 and Connector/Net 1.0.9.
includesecurityasserts , include security asserts	false	Must be set to true when using the MySQLClientPermissions class in a partial trust environment, with the library installed in the GAC of the hosting environment. This requirement is new for partial-trust applications in Connector/Net 6.6.4 and higher. SeeSection 6.19, “Working with Partial Trust / Medium Trust” for details.
Initial Catalog , Database	mysql	The case-sensitive name of the database to use initially.
Interactive , Interactive Session , InteractiveSession	false	If set to true, the client is interactive. An interactive client is one where the server variable CLIENT_INTERACTIVE is set. If an interactive client is set, the wait_timeout variable is set to the value of interactive_timeout . The client will then time out after this period of inactivity. For more details, see Server System Variables in the MySQL Reference Manual.
Integrated Security , IntegratedSecurity	no	Use Windows authentication when connecting to server. By default, it is turned off. To enable, specify a value of yes . (You can also use the value sspi as an alternative to yes .) For details, see Section 6.5, “Using the Windows Native Authentication Plugin”. This option was introduced in Connector/Net 6.4.4.
Keep Alive , Keepalive	0	For TCP connections, idle connection time measured in seconds, before the first keepalive packet is sent. A value of 0 indicates that keepalive is not used.
Logging	false	When true, various pieces of information is output to any configured TraceListeners. See Section 6.14, “Using the MySQL Connector/Net Trace Source Object” for further details.
Old Guids , OldGuids	false	This option was introduced in Connector/Net 6.1.1. The backend representation of a GUID type was changed from BINARY(16) to CHAR(36) . This was done to allow developers to use the server function UUID() to populate a GUID table - UUID() generates a 36-character string. Developers of older applications can add 'Old Guids=true' to the connection string to use a GUID of data type BINARY(16) .
Old Syntax , OldSyntax , Use Old Syntax , UseOldSyntax	false	This option was deprecated in Connector/Net 5.2.2. All code should now be written using the '@' symbol as the parameter marker.
Password , pwd		The password for the MySQL account being used.
Persist Security Info , PersistSecurityInfo	false	When set to false or no (strongly recommended), security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state. Resetting the connection string resets all connection string values, including the password. Recognized values are true , false , yes , and no .
Pipe Name , Pipe , PipeName	mysql	When set to the name of a named pipe, the MySqlConnection attempts to connect to MySQL on that named pipe. This setting only applies to the Windows platform.
Port	3306	The port MySQL is using to listen for connections. This value is ignored if Unix socket is used.
Procedure Cache Size , ProcedureCacheSize , procedure cache , procedurecache	25	Sets the size of the stored procedure cache. By default, Connector/Net stores the metadata (input/output data types) about the last 25 stored procedures used. To disable the stored procedure cache, set the value to zero (0). This option was added in Connector/Net 5.0.2 and Connector/Net 1.0.9.
Protocol , Connection Protocol , ConnectionProtocol	socket	Specifies the type of connection to make to the server. Values can be: socket or tcp for a socket connection, pipe for a named pipe connection, unix for a Unix socket connection, memory to use MySQL shared memory.
Replication	false	Indicates if this connection is to use replicated servers.
Respect Binary Flags , RespectBinaryFlags	true	Setting this option to false means that Connector/Net ignores a column's binary flags as set by the server. This option was added in Connector/Net version 5.1.3.
Shared Memory Name , SharedMemoryName	MYSQL	The name of the shared memory object to use for communication if the connection protocol is set to memory .
Sql Server Mode , sqlservermode	false	Allow SQL Server syntax. When set to true , enables Connector/Net to support square brackets around symbols instead of backticks. This enables Visual Studio wizards that bracket symbols with [] to work with Connector/Net. This option incurs a performance hit, so should only be used if necessary. This option was added in version 6.3.1.
SSL Mode , SslMode	None	This option has the following values: None - do not use SSL. Preferred - use SSL if the server supports it, but allow connection in all cases. Required - Always use SSL. Deny connection if server does not support SSL. VerifyCA - Always use SSL. Validate the CA but tolerate name mismatch. VerifyFull - Always use SSL. Fail if the host name is not correct. This option was introduced in MySQL Connector/Net 6.2.1.
Table Cache , tablecache , tablecaching	false	Enables or disables caching of TableDirect commands. A value of true enables the cache while false disables it. For usage information about table caching, see Section 6.7, “Using Connector/Net with Table Caching”. This option was added in Connector/Net 6.4.
Treat BLOBs as UTF8 , TreatBlobsAsUTF8	false
Treat Tiny As Boolean , TreatTinyAsBoolean	true	Setting this value to false causes TINYINT(1) to be treated as an INT . See Numeric Type Overview for a further explanation of the TINYINT and BOOL data types.
Use Affected Rows , UseAffectedRows	false	When true , the connection reports changed rows instead of found rows. This option was added in Connector/Net version 5.2.6.
Use Procedure Bodies , UseProcedureBodies , procedure bodies	true	When set to true , the default value, MySQL Connector/Net expects the body of the procedure to be viewable. This enables it to determine the parameter types and order. Set the option to false when the user connecting to the database does not have the SELECT privileges for the mysql.proc (stored procedures) table, or cannot view INFORMATION_SCHEMA.ROUTINES . In this case, MySQL Connector/Net cannot determine the types and order of the parameters, and must be alerted to this fact by setting this option to false . When set to false , MySQL Connector/Net does not rely on this information being available when the procedure is called. Because MySQL Connector/Net will not be able to determine this information, explicitly set the types of all the parameters before the call and add the parameters to the command in the same order as they appear in the procedure definition. This option was added in MySQL Connector/Net 5.0.4 and MySQL Connector/Net 1.0.10.
User Id , UserID , Username , Uid , User name , User		The MySQL login account being used.
Compress , Use Compression , UseCompression	false	Setting this option to true enables compression of packets exchanged between the client and the server. This exchange is defined by the MySQL client/server protocol. Compression is used if both client and server support ZLIB compression, and the client has requested compression using this option. A compressed packet header is: packet length (3 bytes), packet number (1 byte), and Uncompressed Packet Length (3 bytes). The Uncompressed Packet Length is the number of bytes in the original, uncompressed packet. If this is zero, the data in this packet has not been compressed. When the compression protocol is in use, either the client or the server may compress packets. However, compression will not occur if the compressed length is greater than the original length. Thus, some packets will contain compressed data while other packets will not.
Use Usage Advisor , Usage Advisor , UseUsageAdvisor	false	Logs inefficient database operations.
Use Performance Monitor , UsePerformanceMonitor , userperfmon , perfmon	false	Indicates that performance counters should be updated during execution.

Connection Pooling Options

The following table lists the valid names for options related to connection pooling within the

ConnectionString

.
For more information about connection pooling, see Section 6.4,
“Using Connector/Net with Connection Pooling”.

Table 7.2 Connector/Net Connection String Options - Connection Pooling


Name	Default	Description
Cache Server Properties , CacheServerProperties	false	Specifies whether server variable settings are updated by a SHOW VARIABLES command each time a pooled connection is returned. Enabling this setting speeds up connections in a connection pool environment. Your application is not informed of any changes to configuration variables made by other connections. This option was added in Connector/Net 6.3.
Connection Lifetime , ConnectionLifeTime	0	When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified by Connection Lifetime . This is useful in clustered configurations to force load balancing between a running server and a server just brought online. A value of zero (0) causes pooled connections to have the maximum connection timeout.
Connection Reset , ConnectionReset	false	If true, the connection state is reset when it is retrieved from the pool. The default value of false avoids making an additional server round trip when obtaining a connection, but the connection state is not reset.
Maximum Pool Size , Max Pool Size , MaximumPoolsize , maxpoolsize (only for Connector/Net 6.7 and later)	100	The maximum number of connections allowed in the pool.
Minimum Pool Size , Min Pool Size , MinimumPoolSize , minpoolsize (only for Connector/Net 6.7 and later)	0	The minimum number of connections allowed in the pool.
Pooling	true	When true , the MySqlConnection object is drawn from the appropriate pool, or if necessary, is created and added to the appropriate pool. Recognized values are true , false , yes , and no .

Copyright © 2004, 2014, Oracle and/or its affiliates. All rights reserved. Legal
Notices

Previous / Next / Up / Table
of Contents

User Comments

Posted by Noah Cutler on June 11 2011 5:26pm

[Delete]
[Edit]

Not sure what the deal is, but on Linux (Fedora 14) running Mono/.NET, by default LINQ queries have square brackets around field names, which of course breaks any LINQ query.

The documentation says that "Sql Server Mode" is false by default & that this will prevent square brackets from being used (instead of backtics); the opposite is actually true, wtf ;-)

Solution on my end is to set "Sql Server Mode" to true in my connection string params.

Using connector 6.3.6
http://dev.mysql.com/doc/refman/5.0/es/connector-net-examples-mysqlconnection.html#connector-net-examples-mysqlconnection-connectionstring
The following table lists the valid names for keyword values within the

ConnectionString

Name	Default	Description
Connect Timeout , Connection Timeout	15	The length of time (in seconds) to wait for a connection to the server before terminating the attempt and generating an error.
Host , Server , Data Source , DataSource , Address , Addr , Network Address	localhost	The name or network address of the instance of MySQL to which to connect. Multiple hosts can be specified separated by &. This can be useful where multiple MySQL servers are configured for replication and you are not concerned about the precise server you are connecting to. No attempt is made by the provider to synchronize writes to the database so care should be taken when using this option. In Unix environment with Mono, this can be a fully qualified path to MySQL socket filename. With this configuration, the Unix socket will be used instead of TCP/IP socket. Currently only a single socket name can be given so accessing MySQL in a replicated environment using Unix sockets is not currently supported.
Ignore Prepare	true	When true, instructs the provider to ignore any calls to MySqlCommand.Prepare(). This option is provided to prevent issues with corruption of the statements when use with server side prepared statements. If you want to use server-side prepare statements, set this option to false. This option was added in Connector/NET 5.0.3.
Port	3306	The port MySQL is using to listen for connections. Specify -1 for this value to use a named pipe connection (Windows only). This value is ignored if Unix socket is used.
Protocol	socket	Specifies the type of connection to make to the server.Values can be: socket or tcp for a socket connection pipe for a named pipe connection unix for a Unix socket connection memory to use MySQL shared memory
CharSet , Character Set		Specifies the character set that should be used to encode all queries sent to the server. Resultsets are still returned in the character set of the data returned.
Logging	false	When true, various pieces of information is output to any configured TraceListeners.
Allow Batch	true	When true, multiple SQL statements can be sent with one command execution. -Note- Starting with MySQL 4.1.1, batch statements should be separated by the server-defined seperator character. Commands sent to earlier versions of MySQL should be seperated with ';'.
Encrypt	false	For Connector/NET 5.0.3 and later, when true , SSL encryption is used for all data sent between the client and server if the server has a certificate installed. Recognized values are true , false , yes , and no . In versions before 5.0.3, this option had no effect.
Initial Catalog , Database	mysql	The name of the database to use intially
Password , pwd		The password for the MySQL account being used.
Persist Security Info	false	When set to false or no (strongly recommended), security-sensitive information, such as the password, is not returned as part of the connection if the connection is open or has ever been in an open state. Resetting the connection string resets all connection string values including the password. Recognized values are true , false , yes , and no .
User Id , Username , Uid , User name		The MySQL login account being used.
Shared Memory Name	MYSQL	The name of the shared memory object to use for communication if the connection protocol is set to memory.
Allow Zero Datetime	false	True to have MySqlDataReader.GetValue() return a MySqlDateTime for date or datetime columns that have illegal values. False will cause a System.DateTime object to be returned for legal values and an exception will be thrown for illegal values.
Convert Zero Datetime	false	True to have MySqlDataReader.GetValue() and MySqlDataReader.GetDateTime() return DateTime.MinValue for date or datetime columns that have illegal values.
Old Syntax , OldSyntax	false	Allows use of '@' symbol as a parameter marker. See MySqlCommand for more info. This is for compatibility only. All future code should be written to use the new '?' parameter marker.
Pipe Name , Pipe	mysql	When set to the name of a named pipe, the MySqlConnection will attempt to connect to MySQL on that named pipe.This settings only applies to the Windows platform.

The following table lists the valid names for connection pooling values within the

ConnectionString

.
For more information about connection pooling, see Connection Pooling for the MySql Data Provider.

Name	Default	Description
Connection Lifetime	0	When a connection is returned to the pool, its creation time is compared with the current time, and the connection is destroyed if that time span (in seconds) exceeds the value specified by Connection Lifetime . This is useful in clustered configurations to force load balancing between a running server and a server just brought online. A value of zero (0) causes pooled connections to have the maximum connection timeout.
Max Pool Size	100	The maximum number of connections allowed in the pool.
Min Pool Size	0	The minimum number of connections allowed in the pool.
Pooling	true	When true , the MySqlConnection object is drawn from the appropriate pool, or if necessary, is created and added to the appropriate pool. Recognized values are true , false , yes , and no .
Reset Pooled Connections , ResetConnections , ResetPooledConnections	true	Specifies whether a ping and a reset should be sent to the server before a pooled connection is returned. Not resetting will yeild faster connection opens but also will not clear out session items such as temp tables.
Cache Server Configuration , CacheServerConfiguration , CacheServerConfig	false	Specifies whether server variables should be updated when a pooled connection is returned. Turning this one will yeild faster opens but will also not catch any server changes made by other connections.

When setting keyword or connection pooling values that require a Boolean value, you can use 'yes' instead of 'true', and 'no' instead of 'false'.

Note

The MySql Data Provider uses the native
socket protocol to communicate with MySQL. Therefore, it does not support the use of an ODBC data source name (DSN) when connecting to MySQL because it does not add an ODBC layer.

CAUTION

In this release, the application
should use caution when constructing a connection string based on user input (for example when retrieving user ID and password information from a dialog box, and appending it to the connection string). The application should ensure that a user cannot embed
extra connection string parameters in these values (for example, entering a password as "validpassword;database=somedb" in an attempt to attach to a different database).

Examples

The following example creates a

MySqlConnection

and
sets some of its properties

Visual Basic example:

Public Sub CreateConnection()
Dim myConnection As New MySqlConnection()
myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass"
myConnection.Open()
End Sub 'CreateConnection

C# example:

public void CreateConnection()
{
MySqlConnection myConnection = new MySqlConnection();
myConnection.ConnectionString = "Persist Security Info=False;database=myDB;server=myHost;Connect Timeout=30;user id=myUser; pwd=myPass";
myConnection.Open();
}

内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理

标签：

相关文章推荐

新的分享

章节导航