本文整理汇总了C#中System.Data.EntityClient.EntityConnection.Close方法的典型用法代码示例。如果您正苦于以下问题：C# EntityConnection.Close方法的具体用法？C# EntityConnection.Close怎么用？C# EntityConnection.Close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System.Data.EntityClient.EntityConnection的用法示例。
在下文中一共展示了EntityConnection.Close方法的15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: Main
static void Main(string[] args)
{
using (var c = new EntityConnection("name=AdventureWorksEntities"))
{
c.StateChange += EStateChange;
var cmd = "SELECT VALUE C FROM AdventureWorksEntities.Contatos AS C WHERE [email protected]";
using (var k = new EntityCommand(cmd, c))
{
k.Parameters.AddWithValue("ContactID", 1);
c.Open();
var dr = k.ExecuteReader(CommandBehavior.SequentialAccess);
if (dr.Read()) //while se existir mais de um registro
{
Console.WriteLine(dr["Nome"]);
}
if (c.State != ConnectionState.Closed) c.Close();
}
}
Console.ReadKey();
}示例2: Test1
public void Test1()
{
string SELECT_PERSONS_ALL = "SELECT p.id as person_id, p.fname, p.lname, ph.id as phone_id , " +
"ph.phonevalue as phonevalue, a.id as address_id , a.addressvalue as addressvalue " +
"FROM Entities.People as p INNER JOIN Entities.Addresses as a ON a.personid = p.id " +
"INNER JOIN Entities.Phones as ph ON ph.personid = p.id";
EntityConnection m_connection = new EntityConnection("name=Entities");
List<Mock.PhoneBook.Phone> list = new List<Mock.PhoneBook.Phone>();
m_connection.Open();
Infrastructure.PhoneBook.IMockConvertor convertor = new ERDBArch.Modules.PhoneBook.BLL.PersonConvertor();
using (EntityCommand cmd = new EntityCommand(SELECT_PERSONS_ALL, m_connection))
{
using (DbDataReader reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
{
while (reader.Read())
{
System.Diagnostics.Debug.WriteLine(reader["person_id"]);
}
}
}
m_connection.Close();
}示例3: GetEntityConnection
/// <summary>
/// Gets the DB connection
/// connection parameters are decrypted
/// </summary>
/// <returns>An Entity (Framework) connection</returns>
public static EntityConnection GetEntityConnection(string serverURI)
{
EntityConnection ans = null;
EntityConnection conn = null;
try
{
// Initialize the EntityConnectionStringBuilder.
EntityConnectionStringBuilder entityBuilder =
new EntityConnectionStringBuilder();
// Set the provider name.
entityBuilder.Provider = "MySql.Data.MySqlClient";
// Set the provider-specific connection string.
entityBuilder.ProviderConnectionString = GetSqlBuilder(serverURI).ToString();
// Set the Metadata location.
entityBuilder.Metadata = @"res://*/Entities.BourseEntities.csdl|res://*/Entities.BourseEntities.ssdl|res://*/Entities.BourseEntities.msl";
string st = entityBuilder.ToString();
conn = new EntityConnection(entityBuilder.ToString());
conn.Open();
// Just testing the connection.
conn.Close();
// CA2000 prevention
ans = conn;
conn = null;
return ans;
}
catch (Exception)
{
throw;
}
finally
{
if (conn != null)
{
conn.Close();
}
}
}示例4: ExecuteESqlQuery
internal static void ExecuteESqlQuery(string cxString, string query)
{
EntityConnection connection = new EntityConnection(cxString);
EntityCommand command = new EntityCommand(query, connection);
connection.Open();
try
{
command.ExecuteReader(CommandBehavior.SequentialAccess).Dump<EntityDataReader>();
}
finally
{
connection.Close();
}
}示例5: GetGenres
public Genre[] GetGenres()
{
Genre[] genres = null;
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT g.genreid, g.genre1 FROM tunesEntities.titel AS a");
stringBuilder.Append(" INNER JOIN tunesEntities.genre AS g ON a.genreid = g.genreid");
stringBuilder.Append(" INNER JOIN tunesEntities.lieder AS t ON a.TitelID = t.TitelID");
stringBuilder.Append(" WHERE t.Liedpfad IS NOT NULL");
stringBuilder.Append(" GROUP BY g.genreid, g.genre1");
stringBuilder.Append(" ORDER BY g.genre1");
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
List<Genre> genreCollection = null;
entityCommand.CommandText = stringBuilder.ToString();
// Execute the command.
using (EntityDataReader dataReader =
entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
// Start reading results.
while (dataReader.Read())
{
IDataReader dataR = dataReader;
if (genreCollection == null)
{
genreCollection = new List<Genre>();
}
Genre genre = new Genre
{
Id = dataReader.GetInt32("genreid", false, 0),
Name = dataReader.GetString("genre1", false, string.Empty)
};
genreCollection.Add(genre);
}
}
if (genreCollection != null)
{
genres = genreCollection.ToArray();
}
}
}
finally
{
entityConnection.Close();
}
}
return genres;
}示例6: GetTracksByFilters
public ICollection<Track> GetTracksByFilters(Filter filter)
{
Collection<Track> tracks = null;
if (filter != null)
{
//filter.Value = "17,25,5,14";
var names = new int[] { 17, 25, 5, 14 };
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT t.LiedID, t.Track, t.Lied ,t.Dauer");
stringBuilder.Append(" FROM tunesEntities.lieder AS t");
stringBuilder.Append(" INNER JOIN tunesEntities.titel AS a ON t.TitelID = a.TitelID");
stringBuilder.Append(" WHERE t.Liedpfad IS NOT NULL");
//stringBuilder.Append(" AND a.genreid IN (17,25,5,14)");
switch (filter.Mode)
{
case FilterMode.Genre:
stringBuilder.Append(" AND a.genreid IN {" + filter.Value + "}");
//stringBuilder.Append(" AND a.genreid IN (@filterValue)");
break;
case FilterMode.Year:
break;
default:
break;
}
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
//EntityParameter filterValue = new EntityParameter();
//filterValue.ParameterName = "filterValue";
//filterValue.Value = filter.Value;
//entityCommand.Parameters.Add(filterValue);
entityCommand.CommandText = sql;
// Execute the command.
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
// Start reading results.
while (dataReader.Read())
{
if (tracks == null)
{
tracks = new Collection<Track>();
}
Track track = new Track
{
Id = dataReader.GetInt32("LiedID", false, 0)
};
tracks.Add(track);
}
}
}
}
finally
{
entityConnection.Close();
}
}
}
return tracks;
}示例7: GetTrackById
public Track GetTrackById(int trackId)
{
Track track = null;
string audioDirectory = this.AudioDirectory;
if (string.IsNullOrEmpty(audioDirectory) == false)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT t.LiedID, t.Track, t.Lied ,t.Dauer, t.Liedpfad, t.guid, a.TitelID, a.Titel1, a.Guid as AlbumId, i.Interpret FROM tunesEntities.lieder AS t");
stringBuilder.Append(" JOIN tunesEntities.titel AS a ON a.TitelID = t.TitelID");
stringBuilder.Append(" JOIN tunesEntities.interpreten AS i ON a.InterpretID = i.InterpretID");
stringBuilder.Append(" WHERE t.LiedId = @trackid");
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
EntityParameter trackIdParam = new EntityParameter();
trackIdParam.ParameterName = "trackid";
trackIdParam.Value = trackId;
entityCommand.Parameters.Add(trackIdParam);
entityCommand.CommandText = sql;
// Execute the command.
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
if (dataReader.Read() == true)
{
track = new Track
{
Id = dataReader.GetInt32("LiedID", false, 0),
TrackNumber = dataReader.GetInt32("Track", false, 0),
Name = dataReader.GetString("Lied", false, string.Empty),
Duration = dataReader.GetTimeSpan("Dauer", true, TimeSpan.MinValue),
Guid = dataReader.GetGuid("guid", false, Guid.Empty),
Album = new Album
{
Id = dataReader.GetInt32("TitelID", false, 0),
Title = dataReader.GetString("Titel1", false, string.Empty),
AlbumId = dataReader.GetGuid("AlbumId", false, Guid.Empty),
Artist = new Artist
{
Name = dataReader.GetString("Interpret", false, string.Empty)
}
}
};
}
}
}
}
finally
{
entityConnection.Close();
}
}
}
return track;
}示例8: GetAudioFileNameByGuid
public string GetAudioFileNameByGuid(Guid guid)
{
string fileName = null;
string audioDirectory = this.AudioDirectory;
if (string.IsNullOrEmpty(audioDirectory) == false && guid != null && guid != Guid.Empty)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT t.Liedpfad FROM tunesEntities.lieder AS t");
stringBuilder.Append(" WHERE t.guid = @guid");
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
EntityParameter guidParam = new EntityParameter();
guidParam.ParameterName = "guid";
guidParam.Value = guid.ToString();
entityCommand.Parameters.Add(guidParam);
entityCommand.CommandText = sql;
// Execute the command.
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
if (dataReader.Read() == true)
{
fileName = GetTrackFilePath(dataReader, audioDirectory);
}
}
}
}
finally
{
entityConnection.Close();
}
}
}
return fileName;
}示例9: GetImage
public CoverImage GetImage(Guid imageId, bool asThumbnail = false)
{
CoverImage image = null;
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT a.{0}, a.PictureFormat, a.ErstellDatum, a.MutationDatum");
stringBuilder.Append(" FROM tunesEntities.titel AS a");
stringBuilder.Append(" WHERE a.guid = @imageId");
string field = asThumbnail ? "thumbnail" : "cover";
string sql = string.Format(CultureInfo.InvariantCulture, stringBuilder.ToString(), field);
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
EntityParameter id = new EntityParameter();
id.ParameterName = "imageId";
id.Value = imageId.ToString();
entityCommand.Parameters.Add(id);
entityCommand.CommandText = sql;
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
if (dataReader.Read())
{
image = new CoverImage
{
Cover = dataReader.GetBytes(field, true, null),
Extension = dataReader.GetString("PictureFormat", true,String.Empty),
ModifiedSince = dataReader.GetDateTime("MutationDatum", true, DateTime.MinValue)
};
}
}
}
}
finally
{
entityConnection.Close();
}
}
return image;
}示例10: GetPlaylistsByUserName
public Playlist[] GetPlaylistsByUserName(string userName, int limit)
{
Playlist[] playlists = null;
if (!string.IsNullOrEmpty(userName))
{
bool hasLimit = false;
if (limit > 0)
{
hasLimit = true;
}
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT p.ListId, p.ListName, p.User, p.guid FROM tunesEntities.playlist AS p");
stringBuilder.Append(" WHERE p.User = @userName");
stringBuilder.Append(" ORDER BY p.ListName");
if (hasLimit)
{
stringBuilder.Append(" LIMIT @limit ");
}
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
EntityParameter user = new EntityParameter();
user.ParameterName = "userName";
user.Value = userName;
entityCommand.Parameters.Add(user);
EntityParameter limitParam = new EntityParameter();
limitParam.ParameterName = "limit";
limitParam.Value = limit;
entityCommand.Parameters.Add(limitParam);
List<Playlist> playlistCollection = null;
entityCommand.CommandText = sql;
// Execute the command.
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
// Start reading results.
while (dataReader.Read())
{
if (playlistCollection == null)
{
playlistCollection = new List<Playlist>();
}
Playlist playlist = new Playlist
{
Id = dataReader.GetInt32("ListId", false, 0),
Name = dataReader.GetString("ListName", false, string.Empty),
UserName = dataReader.GetString("User", false, string.Empty),
Guid = dataReader.GetGuid("guid", true, Guid.Empty)
};
playlistCollection.Add(playlist);
}
}
if (playlistCollection != null)
{
playlists = playlistCollection.ToArray();
}
}
}
finally
{
entityConnection.Close();
}
}
}
return playlists;
}示例11: GetAlbums
public Album[] GetAlbums(Query query)
{
Album[] albums = null;
if (query == null)
{
query = new Query
{
PageIndex = 0,
PageSize = 1
};
}
query.PageSize = query.PageSize == 0 ? 1 : query.PageSize;
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT i.InterpretID, i.Interpret, i.Interpret_Lang ,a.TitelID, a.Titel1, a.Guid as AlbumId FROM tunesEntities.titel AS a");
stringBuilder.Append(" INNER JOIN tunesEntities.interpreten AS i ON a.InterpretID = i.InterpretID");
stringBuilder.Append(" INNER JOIN tunesEntities.lieder AS t ON a.TitelID = t.TitelID");
stringBuilder.Append(" WHERE t.Liedpfad IS NOT NULL");
stringBuilder.Append(" GROUP BY i.InterpretID, i.Interpret, i.Interpret_Lang ,a.TitelID, a.Titel1, a.Guid");
if (query.SortByCondition != null && query.SortByCondition.Id == 1)
{
stringBuilder.Append(" ORDER BY a.Titel1");
}
else
{
stringBuilder.Append(" ORDER BY i.Interpret, a.Titel1");
}
stringBuilder.Append(" SKIP @skip LIMIT @limit ");
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
EntityParameter skip = new EntityParameter();
skip.ParameterName = "skip";
skip.Value = query.PageIndex;
entityCommand.Parameters.Add(skip);
EntityParameter limit = new EntityParameter();
limit.ParameterName = "limit";
limit.Value = query.PageSize;
entityCommand.Parameters.Add(limit);
List<Album> albumCollection = null;
entityCommand.CommandText = sql;
// Execute the command.
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
// Start reading results.
while (dataReader.Read())
{
if (albumCollection == null)
{
albumCollection = new List<Album>();
}
Album album = new Album
{
Artist = new Artist
{
Id = dataReader.GetInt32("InterpretID", false, 0),
Name = dataReader.GetString("Interpret", false, string.Empty),
SortName = dataReader.GetString("Interpret_Lang", true, string.Empty)
},
Id = dataReader.GetInt32("TitelID", false, 0),
Title = dataReader.GetString("Titel1", false, string.Empty),
AlbumId = dataReader.GetGuid("AlbumId", false, Guid.Empty)
};
albumCollection.Add(album);
}
}
if (albumCollection != null)
{
albums = albumCollection.ToArray();
}
}
}
finally
{
entityConnection.Close();
}
}
return albums;
}示例12: GetNumberOfPlayableAlbums
public int GetNumberOfPlayableAlbums()
{
int iNumberofAlbums = -1;
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT COUNT(DISTINCT a.TitelID) FROM tunesEntities.titel AS a");
stringBuilder.Append(" INNER JOIN tunesEntities.lieder AS t ON a.TitelID = t.TitelID");
stringBuilder.Append(" WHERE t.Liedpfad IS NOT NULL");
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
entityCommand.CommandText = sql;
object obj = entityCommand.ExecuteScalar();
if (obj is int)
{
iNumberofAlbums = (int)obj;
}
}
}
finally
{
entityConnection.Close();
}
}
return iNumberofAlbums;
}示例13: GetPlaylistByIdWithNumberOfEntries
public Playlist GetPlaylistByIdWithNumberOfEntries(int playlistId, string userName)
{
Playlist playlist = null;
if (string.IsNullOrEmpty(userName) == false)
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.Append("SELECT p.ListId, p.ListName, p.guid, COUNT(pe.PlaylistId) as Number ");
stringBuilder.Append(" FROM tunesEntities.playlist AS p");
stringBuilder.Append(" LEFT JOIN tunesEntities.playlistentries AS pe ON p.ListId = pe.PlaylistId");
stringBuilder.Append(" WHERE p.ListId = @playlistId");
stringBuilder.Append(" AND p.User = @userName");
stringBuilder.Append(" GROUP BY p.listid, p.ListName, p.guid");
string sql = stringBuilder.ToString();
using (System.Data.EntityClient.EntityConnection entityConnection =
new System.Data.EntityClient.EntityConnection(this.ConnectionString))
{
try
{
entityConnection.Open();
using (EntityCommand entityCommand = entityConnection.CreateCommand())
{
EntityParameter id = new EntityParameter();
id.ParameterName = "playlistId";
id.Value = playlistId;
entityCommand.Parameters.Add(id);
EntityParameter user = new EntityParameter();
user.ParameterName = "userName";
user.Value = userName;
entityCommand.Parameters.Add(user);
entityCommand.CommandText = sql;
// Execute the command.
using (EntityDataReader dataReader = entityCommand.ExecuteReader(System.Data.CommandBehavior.SequentialAccess))
{
if (dataReader.Read() == true)
{
playlist = new Playlist
{
Id = dataReader.GetInt32("ListId", false, 0),
Name = dataReader.GetString("ListName", false, string.Empty),
Guid = dataReader.GetGuid("guid", false, Guid.Empty),
NumberEntries = dataReader.GetInt32("Number", false, 0)
};
}
}
}
}
catch(Exception ex)
{
}
finally
{
entityConnection.Close();
}
}
}
return playlist;
}示例14: RunESQLExample
public static void RunESQLExample()
{
System.Console.WriteLine("\nUsing Entity SQL");
var esqlQuery = @"SELECT order.SalesOrderID, order.OrderDate, order.DueDate, order.ShipDate FROM AdventureWorksEntities.SalesOrderHeaders AS order where order.SalesOrderID = 43661";
using (var conn = new EntityConnection("name=AdventureWorksEntities"))
{
conn.Open();
// Create an EntityCommand.
using (EntityCommand cmd = conn.CreateCommand())
{
cmd.CommandText = esqlQuery;
// Execute the command.
using (EntityDataReader rdr = cmd.ExecuteReader(CommandBehavior.SequentialAccess))
{
// Start reading results.
while (rdr.Read())
{
System.Console.WriteLine("\nSalesOrderID: {0} \nOrderDate: {1} \nDueDate: {2} \nShipDate: {3}", rdr[0], rdr[1], rdr[2], rdr[3]);
}
}
}
conn.Close();
}
}示例15: ejemploentity
private void ejemploentity()
{
using (EntityConnection conn = new EntityConnection("name=travelEntitiesGeneral"))
{
conn.Open();
EntityCommand cmd = conn.CreateCommand();
cmd.CommandText = @"select c.BlogID from travelEntitiesGeneral.Blogs as c where c.BlogPosts.Count > 0";
EntityDataReader reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);
while (reader.Read())
{
Console.WriteLine("BlogID = {0}", reader["BlogID"]);
}
conn.Close();
}
}