第一种情况,本地开发时,使用本地数据库,如下面的代码 复制代码 代码如下: <add name=”myConn” connectionString...第二种情况,本地开发时,使用下面的连接字符串: 复制代码 代码如下: <add name=”myConn” connectionString=...DataDirectory|MvcMusicStore.sdf” providerName=”System.Data.SqlServerCe.4.0″/> 说 明:这里的connectionString...第三种情况,本地开发时,使用下面代码: 复制代码 代码如下: <connectionStrings <add name=”DefaultConnection” connectionString...第四种情况,远程部署时,可以看到下面的代码: 复制代码 代码如下: <add name=”myConn” connectionString=”
C# Oracle 连接与修改 1、连接Oracle,并可以将数据库的数据显示在 GridControl上 string ConnectionString = “Data Source=数据库名;User...no;”; Oracle… 文章 衣舞晨风 2014-01-08 884浏览量 C# Oracle 连接与修改 1、连接Oracle,并可以将数据库的数据显示在 GridControl上 string ConnectionString
ConnectionString 类似于 OLE DB 连接字符串,但并不相同。...可以使用 ConnectionString 属性连接到数据库。下面的示例阐释了一个典型的连接字符串。...SqlConnection 属性只返回那些包含在 ConnectionString 中的设置。 若要连接到本地机器,请将服务器指定为“(local)”。(必须始终指定一个服务器。)...重置已关闭连接上的 ConnectionString 会重置包括密码在内的所有连接字符串值(和相关属性)。...下表列出了 ConnectionString 中的关键字值的有效名称。
今天说一说修改WPF中connectionString[通俗易懂],希望能够帮助大家进步!!!...connectionStrings/add[@name=’EFDbConnection’]"); XmlElement xe = node as XmlElement; xe.SetAttribute("connectionString...strFileName"); System.Configuration.ConfigurationManager.RefreshSection("connectionStrings"); } 从connectionString...SqlConnectionStringBuilder scb= new SqlConnectionStringBuilder(ConfigurationManager.ConnectionStrings["EFDbContext"].connectionString
ConnectionString 类似于 OLE DB 连接字符串,但并不相同。...可以使用 ConnectionString 属性连接到数据库。下面的示例阐释了一个典型的连接字符串。...重置已关闭连接上的 ConnectionString 会重置包括密码在内的所有连接字符串值(和相关属性)。...下表列出了 ConnectionString 中的关键字值的有效名称。...下表列出了 ConnectionString 内连接池值的有效名称。有关更多信息,请参见 使用连接池。
关于“ConnectionString 属性尚未初始化”的问题(如下图), 我在下面一段代码中发现了问题所在: public bool ReturnFlag(string strSQL)...cnn.Dispose(); } 问题就出在标红的代码上,cnn.dispose() 释放con对象所占用的资源,释放后这个对象就不可用了,所以出现“ConnectionString
附图一张: 错误提示:ConnectionString属性尚未初始化。因为它的出现让我再次开始了1小时多的百度之旅,查查查!下面 就总结一下这个问题。
conn.asp修改前<%dim conn,rs,sqlon error resume nextset conn=server.createobject("adodb.connection")conn.connectionstring...conn.asp修改后<%dim conn,rs,sqlon error resume nextset conn=server.createobject("adodb.connection")conn.connectionstring
并返回connectionString的值 /// /// connectionString的值 ...= ConfigurationManager.AppSettings["ConnectionString"]; return connectionString; ...} /// /// 不从配置文件里读取连接字符串,直接通过参数赋值给connectionString /// </summary...) { this.connectionString = connectionString; } /// <summary...= this.connectionString; DbCMD.Connection = DbConn; DbCMD.CommandText = strSql
> </configuration...; private static string database = ConfigurationManager.ConnectionStrings["database"].ConnectionString...; private static string login = ConfigurationManager.ConnectionStrings["login"].ConnectionString
; public string ConnectionString { get { if...(string.IsNullOrWhiteSpace(_connectionString)) { _connectionString...= ConfigurationManager.ConnectionStrings["testConn"].ConnectionString; }...return _connectionString; } set { _connectionString...) : base(connectionString) { } public DbSet Blogs { get;
{ ConnectionString = connectionString; } public string ConnectionString {...) { ConnectionString = connectionString; } public abstract DbProviderFactory...DbProviderFactory { get; } public string ConnectionString { get; } //以下实现的帮助类方法,...) : base(connectionString) { this.DbProviderFactory = SqlClientFactory.Instance;...) { ConnectionString = connectionString; } public abstract DbProviderFactory
/// /// 定义获取当前或其他应用程序配置文件中connectionStrings节点的所有ConnectionString.../// /// 返回connectionStrings节点的所有ConnectionString public...ConnectionString /// connectionStrings ProviderName public void SetConnectionStringsSection(string name, string ConnectionString, string providerName...= null) { conSection.ConnectionStrings[name].ConnectionString = ConnectionString
/data:/data environment: - TZ=Asia/Shanghai - DBType=sqlite - ConnectionString=data source.../data:/data environment: - TZ=Asia/Shanghai - DBType=postgresql - "ConnectionString=Host.../data:/data environment: - TZ=Asia/Shanghai - DBType=sqlserver - "ConnectionString=Server.../data:/data environment: - TZ=Asia/Shanghai - DBType=mysql - "ConnectionString=mysql://...=mysql://root:dd666666@localhost:3306/token" \ -e "ConnectionString=mysql://root:dd666666@localhost
System.Configuration; using System.IO; public abstract class MySqlHelper { //Get the database connectionstring...">a valid database connectionstring /// MySqlCommand command type (... /// a valid database connectionstring /// connectionstring /// command type, such as using stored procedures...">connectionstring /// command type, such as using stored procedures
/连接字符串 Database='数据库';Data Source='IP地址';User Id='sa';Password='sa';pooling=true private string connectionString... /// 默认构造函数(DbHelper) /// public MySqlDbHelper() { this.connectionString...= ConfigurationManager.ConnectionStrings[defaultConfigKeyName].ConnectionString; this.providerName...// 连接字符串名 public MySqlDbHelper(string keyName) { this.connectionString...{ DataSet dataset = new DataSet(); using (MySqlConnection con = new MySqlConnection(connectionString
"].ConnectionString; // 用于缓存参数的HASH表 private static Hashtable parmCache = Hashtable.Synchronized...; /// /// 给定连接的数据库用假设参数执行一个sql命令(不返回数据集) /// /// /// 执行命令所影响的行数 public static int ExecuteNonQuery(string connectionString...OleDbCommand cmd = new OleDbCommand(); using (OleDbConnection conn = new OleDbConnection(connectionString... /// 包含结果的读取器 public static OleDbDataReader ExecuteReader(string connectionString
|| connectionString.Length == 0) throw new ArgumentNullException("connectionString"); if...|| connectionString.Length == 0) throw new ArgumentNullException("connectionString"); if...|| connectionString.Length == 0) throw new ArgumentNullException("connectionString"); if...|| connectionString.Length == 0) throw new ArgumentNullException("connectionString"); if...|| connectionString.Length == 0) throw new ArgumentNullException("connectionString"); if
则会添加此节点及对应的值,存在则修改 /// /// 节点名称 /// 节点值 public void SetConnectionString(string key, string connectionString...{ ConnectionStringSettings connectionStringSettings = new ConnectionStringSettings(key, connectionString...} else//如果存在此节点,则修改 { connectionSetting.ConnectionStrings[key].ConnectionString...= connectionString; } } /// /// 保存所作的修改 public void Save() { config.Save...= null) { config.Save(); } } } 二、调用方法: // 连接字符串 string connectionString
System.Data.SQLite; namespace DAL { internal abstract class DbHelperSQLite { public static string connectionString...ExecuteSql(string SQLString) { using (SQLiteConnection connection = new SQLiteConnection(connectionString...SQLString, string content) { using (SQLiteConnection connection = new SQLiteConnection(connectionString...GetSingle(string SQLString) { using (SQLiteConnection connection = new SQLiteConnection(connectionString...SQLiteParameter[] cmdParms) { using (SQLiteConnection connection = new SQLiteConnection(connectionString
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