C# Class Azavea.Open.DAO.SQL.SqlConnectionUtilities

This class holds static utility methods having to do with database access. The goal is twofold: 1: To reduce the number of lines of code required to to basic database stuff (if you're doing more complicated stuff, it may be appropriate to look at Azavea.Common.NHibernate and consider using NHibernate). 2: To ensure that connections are handled appropriately even in exception cases (I.E. they are closed and/or returned to the pool whether or not exceptions happen). Since no one likes obnoxiously long method names, "ExceptionSafe" has been abbreviated as "XSafe". There are two groups of methods, the "XSafe" query/command methods and the "DataSet" methods. The DataSet methods are provided primarily because some things (such as .NET controls) use DataSets directly. However, in general when writing new code you should use the XSafe methods, because they use DataReaders which are a faster way of accessing the database than DataSets. This class currently implements fairly primitive connection pooling. While .NET claims to do connection pooling for you, there is still a significant performance savings to be had by saving "DbConnection" objects and reusing them. The existing connection pooling basically saves one connection to any database you use this class to connect to. This achieves most of the savings that can be achieved with pooling, but if necessary a more complicated pooling scheme can be added in the future. Note that connection pooling is NOT used for all databases, since they may not support more than one "write" connection at a time.

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Méthodes publiques

Méthode	Description
CreateIndex ( AbstractSqlConnectionDescriptor connDesc, string indexName, bool isUnique, string tableName, IEnumerable columnNames ) : void	Creates an index on a database table.
CreateIndex ( AbstractSqlConnectionDescriptor connDesc, string indexName, string tableName, IEnumerable columnNames ) : void	Creates a non-unique index on a database table.
DropIndex ( AbstractSqlConnectionDescriptor connDesc, string indexName ) : bool	Drops the specified index.
GenerateMappingFromSchema ( AbstractSqlConnectionDescriptor connDesc, string tableName ) : ClassMapping	Generates a simplistic classmapping (without changing any column/field names) from a table's schema. Intended for times when you are transferring data without really using it, for example from a DB to a CSV. Will most likely only be useful for a DictionaryDAO since there is no defined .NET class to map to. All column names will be returned in caps.
GenerateMappingFromSchema ( AbstractSqlConnectionDescriptor connDesc, string tableName, IComparer columnSorter ) : ClassMapping	Generates a simplistic classmapping (without changing any column/field names) from a table's schema. Intended for times when you are transferring data without really using it, for example from a DB to a CSV. Will most likely only be useful for a DictionaryDAO since there is no defined .NET class to map to. All column names will be returned in caps.
GetSchema ( AbstractSqlConnectionDescriptor connDesc ) : DataTable	Similar to DbConnection.GetSchema, except this keeps the connection handling logic here in the utility class.
GetSchema ( AbstractSqlConnectionDescriptor connDesc, string name, string restrictions ) : DataTable	Similar to DbConnection.GetSchema, except this keeps the connection handling logic here in the utility class.
QueryForDataSet ( AbstractSqlConnectionDescriptor connDesc, string dataTableName, string sql, IEnumerable sqlParams ) : DataSet	Queries for data and populates the specified dataset. If you already have a dataset, use the QueryIntoDataSet method.
QueryIntoDataSet ( AbstractSqlConnectionDescriptor connDesc, string dataTableName, string sql, IEnumerable sqlParams, DataSet fillMe ) : void	Queries for data and populates the specified dataset. If you do not have a dataset already, call QueryForDataSet instead.
TestConnection ( AbstractSqlConnectionDescriptor connDesc ) : bool	Attempts to determine if a connection can be made using the specified connection string.
TruncateTable ( AbstractSqlConnectionDescriptor connDesc, string tableName ) : void	Truncates a table if supported by the DB, otherwise deletes all rows (which is effectively the same, but potentially a lot slower).
XSafeBoolQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : bool	Similar to the "XSafeQuery" method, except this executes a query that returns a single boolean.
XSafeBoolQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : bool	Similar to the "XSafeQuery" method, except this executes a query that returns a single boolean.
XSafeCommand ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : int	Similar to the "XSafeQuery" method, except this executes a non-query type SQL statement.
XSafeCommand ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : int	Similar to the "XSafeQuery" method, except this executes a non-query type SQL statement.
XSafeDateQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : System.DateTime	Similar to the "XSafeQuery" method, except this executes a query that returns a single DateTime (such as SELECT MAX(DateField)).
XSafeDateQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : System.DateTime	Similar to the "XSafeQuery" method, except this executes a query that returns a single DateTime (such as SELECT MAX(DateField)).
XSafeDoubleQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : double	Similar to the "XSafeQuery" method, except this executes a query that returns a single floating-point number (such as SELECT SUM(...)).
XSafeDoubleQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : double	Similar to the "XSafeQuery" method, except this executes a query that returns a single floating-point number (such as SELECT SUM(...)).
XSafeIntListQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : IList	Similar to the other XSafe methods, except this one returns a list of integers (for example, SELECT AGE FROM EMPLOYEES).
XSafeIntListQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : IList	Similar to the other XSafe methods, except this one returns a list of integers (for example, SELECT AGE FROM EMPLOYEES).
XSafeIntQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : int	Similar to the "XSafeQuery" method, except this executes a query that returns a single integer (such as SELECT COUNT).
XSafeIntQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : int	Similar to the "XSafeQuery" method, except this executes a query that returns a single integer (such as SELECT COUNT).
XSafeQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams, DataReaderDelegate invokeMe, Hashtable parameters ) : void	This provides a way to query the DB and do something with the results without having to copy the "try, open, try, execute, finally, close, finally, close" type logic in a bunch of places. This method correctly closes the objects used in the DB access in the event of an exception.
XSafeQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams, DataReaderDelegate invokeMe, Hashtable parameters ) : void	This provides a way to query the DB and do something with the results without having to copy the "try, open, try, execute, finally, close, finally, close" type logic in a bunch of places. This method correctly closes the objects used in the DB access in the event of an exception.
XSafeStringListQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : IList	Similar to the other XSafe methods, except this one returns a list of strings (for example, SELECT NAME FROM EMPLOYEES).
XSafeStringListQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : IList	Similar to the other XSafe methods, except this one returns a list of strings (for example, SELECT NAME FROM EMPLOYEES).
XSafeStringQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : string	Similar to the "XSafeQuery" method, except this executes a query that returns a single string.
XSafeStringQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : string	Similar to the "XSafeQuery" method, except this executes a query that returns a single string.

Private Methods

Méthode	Description
ReadIntsFromQuery ( Hashtable parameters, IDataReader reader ) : void	Just reads the results, Convert.ToInt32's 'em, and puts them into the parameters hashtable as a list called 'results'. Nulls are ignored!
ReadStringsFromQuery ( Hashtable parameters, IDataReader reader ) : void	Just reads the results, ToString's 'em, and puts them into the parameters hashtable as a list called 'results'.
SetSQLOnCommand ( AbstractSqlConnectionDescriptor connDesc, IDbCommand cmd, string sql, IEnumerable sqlParams ) : void	Helper to set up a command with sql and parameters and other misc stuff.
XSafeScalarQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : object	Similar to the "XSafeQuery" method, except this executes a query that returns a single result.

Method Details

CreateIndex() public static méthode

Creates an index on a database table.

public static CreateIndex ( AbstractSqlConnectionDescriptor connDesc, string indexName, bool isUnique, string tableName, IEnumerable columnNames ) : void
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
indexName	string	Name of the index to create.
isUnique	bool	Is this a unique index?
tableName	string	What table to create the index on.
columnNames	IEnumerable	The columns included in the index.
Résultat	void

CreateIndex() public static méthode

Creates a non-unique index on a database table.

public static CreateIndex ( AbstractSqlConnectionDescriptor connDesc, string indexName, string tableName, IEnumerable columnNames ) : void
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
indexName	string	Name of the index to create.
tableName	string	What table to create the index on.
columnNames	IEnumerable	The columns included in the index.
Résultat	void

DropIndex() public static méthode

Drops the specified index.

public static DropIndex ( AbstractSqlConnectionDescriptor connDesc, string indexName ) : bool
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
indexName	string	The name of the index to remove.
Résultat	bool

GenerateMappingFromSchema() public static méthode

Generates a simplistic classmapping (without changing any column/field names) from a table's schema. Intended for times when you are transferring data without really using it, for example from a DB to a CSV. Will most likely only be useful for a DictionaryDAO since there is no defined .NET class to map to. All column names will be returned in caps.

public static GenerateMappingFromSchema ( AbstractSqlConnectionDescriptor connDesc, string tableName ) : ClassMapping
connDesc	AbstractSqlConnectionDescriptor	Connection descriptor for the database.
tableName	string	Name of the table to generate a mapping for.
Résultat	ClassMapping

GenerateMappingFromSchema() public static méthode

public static GenerateMappingFromSchema ( AbstractSqlConnectionDescriptor connDesc, string tableName, IComparer columnSorter ) : ClassMapping
connDesc	AbstractSqlConnectionDescriptor	Connection descriptor for the database.
tableName	string	Name of the table to generate a mapping for.
columnSorter	IComparer	Since auto-generated column mappings are likely used for /// purposes such as exporting to a CSV, if you wish the columns /// to be sorted in some sort of order, you may provide an /// IComparer to do so. May be null.
Résultat	ClassMapping

GetSchema() public static méthode

Similar to DbConnection.GetSchema, except this keeps the connection handling logic here in the utility class.

public static GetSchema ( AbstractSqlConnectionDescriptor connDesc ) : DataTable
connDesc	AbstractSqlConnectionDescriptor	Connection descriptor for the database.
Résultat	System.Data.DataTable

GetSchema() public static méthode

Similar to DbConnection.GetSchema, except this keeps the connection handling logic here in the utility class.

public static GetSchema ( AbstractSqlConnectionDescriptor connDesc, string name, string restrictions ) : DataTable
connDesc	AbstractSqlConnectionDescriptor	Connection descriptor for the database.
name	string	The name of the type of object you want schema info on. /// For example, "Columns" to get info on the columns.
restrictions	string	A magic string array that means something to /// DbConnection.GetSchema. Should be a string array /// of the following restrictions: /// [0] = Catalog /// [1] = Owner /// [2] = Table /// [3] = TableType /// Any/all may be null.
Résultat	System.Data.DataTable

QueryForDataSet() public static méthode

Queries for data and populates the specified dataset. If you already have a dataset, use the QueryIntoDataSet method.

public static QueryForDataSet ( AbstractSqlConnectionDescriptor connDesc, string dataTableName, string sql, IEnumerable sqlParams ) : DataSet
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This will be /// used to get the database connection.
dataTableName	string	The name of the DataTable to put data into in the DataSet. /// May be null if you wish to use the default given by the DataAdapter.
sql	string	The parameterized SQL query (?'s for values).
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	System.Data.DataSet

QueryIntoDataSet() public static méthode

Queries for data and populates the specified dataset. If you do not have a dataset already, call QueryForDataSet instead.

public static QueryIntoDataSet ( AbstractSqlConnectionDescriptor connDesc, string dataTableName, string sql, IEnumerable sqlParams, DataSet fillMe ) : void
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This will be /// used to get the database connection.
dataTableName	string	The name of the DataTable to put data into in the DataSet. /// May be null if you wish to use the default given by the DataAdapter.
sql	string	The parameterized SQL query (?'s for values).
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
fillMe	System.Data.DataSet	The dataset to put data into. Must not be null.
Résultat	void

TestConnection() public static méthode

Attempts to determine if a connection can be made using the specified connection string.

public static TestConnection ( AbstractSqlConnectionDescriptor connDesc ) : bool
connDesc	AbstractSqlConnectionDescriptor	Connection descriptor to test.
Résultat	bool

TruncateTable() public static méthode

Truncates a table if supported by the DB, otherwise deletes all rows (which is effectively the same, but potentially a lot slower).

public static TruncateTable ( AbstractSqlConnectionDescriptor connDesc, string tableName ) : void
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
tableName	string	What table we want to blow away the contents of.
Résultat	void

XSafeBoolQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single boolean.

public static XSafeBoolQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : bool
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	bool

XSafeBoolQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single boolean.

public static XSafeBoolQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : bool
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	bool

XSafeCommand() public static méthode

Similar to the "XSafeQuery" method, except this executes a non-query type SQL statement.

public static XSafeCommand ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : int
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL statement to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	int

XSafeCommand() public static méthode

Similar to the "XSafeQuery" method, except this executes a non-query type SQL statement.

public static XSafeCommand ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : int
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL statement to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	int

XSafeDateQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single DateTime (such as SELECT MAX(DateField)).

public static XSafeDateQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : System.DateTime
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	System.DateTime

XSafeDateQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single DateTime (such as SELECT MAX(DateField)).

public static XSafeDateQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : System.DateTime
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	System.DateTime

XSafeDoubleQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single floating-point number (such as SELECT SUM(...)).

public static XSafeDoubleQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : double
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	double

XSafeDoubleQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single floating-point number (such as SELECT SUM(...)).

public static XSafeDoubleQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : double
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	double

XSafeIntListQuery() public static méthode

Similar to the other XSafe methods, except this one returns a list of integers (for example, SELECT AGE FROM EMPLOYEES).

public static XSafeIntListQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : IList
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	IList

XSafeIntListQuery() public static méthode

Similar to the other XSafe methods, except this one returns a list of integers (for example, SELECT AGE FROM EMPLOYEES).

public static XSafeIntListQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : IList
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	IList

XSafeIntQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single integer (such as SELECT COUNT).

public static XSafeIntQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : int
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	int

XSafeIntQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single integer (such as SELECT COUNT).

public static XSafeIntQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : int
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	int

XSafeQuery() public static méthode

This provides a way to query the DB and do something with the results without having to copy the "try, open, try, execute, finally, close, finally, close" type logic in a bunch of places. This method correctly closes the objects used in the DB access in the event of an exception.

public static XSafeQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams, DataReaderDelegate invokeMe, Hashtable parameters ) : void
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL statement to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
invokeMe	DataReaderDelegate	The method to delegate to. If null, nothing is /// done with the data reader and it is just closed.
parameters	System.Collections.Hashtable	The other parameters to the delegate, in whatever /// form makes sense for that delegate method.
Résultat	void

XSafeQuery() public static méthode

public static XSafeQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams, DataReaderDelegate invokeMe, Hashtable parameters ) : void
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL statement to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
invokeMe	DataReaderDelegate	The method to delegate to. If null, nothing is /// done with the data reader and it is just closed.
parameters	System.Collections.Hashtable	The other parameters to the delegate, in whatever /// form makes sense for that delegate method.
Résultat	void

XSafeStringListQuery() public static méthode

Similar to the other XSafe methods, except this one returns a list of strings (for example, SELECT NAME FROM EMPLOYEES).

public static XSafeStringListQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : IList
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	IList

XSafeStringListQuery() public static méthode

Similar to the other XSafe methods, except this one returns a list of strings (for example, SELECT NAME FROM EMPLOYEES).

public static XSafeStringListQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : IList
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	IList

XSafeStringQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single string.

public static XSafeStringQuery ( AbstractSqlConnectionDescriptor connDesc, SqlTransaction transaction, string sql, IEnumerable sqlParams ) : string
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
transaction	SqlTransaction	The transaction to do this as part of.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	string

XSafeStringQuery() public static méthode

Similar to the "XSafeQuery" method, except this executes a query that returns a single string.

public static XSafeStringQuery ( AbstractSqlConnectionDescriptor connDesc, string sql, IEnumerable sqlParams ) : string
connDesc	AbstractSqlConnectionDescriptor	The database connection descriptor. This is used both as /// a key for caching connections/commands as well as for /// getting the actual database connection the first time.
sql	string	The SQL query to execute.
sqlParams	IEnumerable	A list of objects to use as parameters /// to the SQL statement. The list may be /// null if there are no parameters.
Résultat	string