publicoverridestringConnectionString {get;set; } 属性值 String 连接字符串,其中包含源数据库名称和建立初始连接所需的其他参数。 默认值为一个空字符串。 例外 ArgumentException 提供了一个无效的连接字符串参数,或者未提供所需的连接字符串参数。 示例 以下示例在打开连...
以下示例在打开连接之前创建SqlConnection并设置ConnectionString属性。 C#复制 privatestaticvoidOpenSqlConnection(){stringconnectionString = GetConnectionString();using(SqlConnection connection =newSqlConnection()) { connection.ConnectionString = connectionString; connection.Open(); Console.WriteLine("State: {0}...
下列範例會建立 ,SqlConnection並在開啟連接之前設定ConnectionString屬性。 C#複製 privatestaticvoidOpenSqlConnection(){stringconnectionString = GetConnectionString();using(SqlConnection connection =newSqlConnection()) { connection.ConnectionString = connectionString; connection.Open(); Console.WriteLine("State:...
'获取新的字符串内容; Dim connectionString As String = GetNewConnectionString(setting.AppServerSetting) '打开config文件; Dim config As System.Configuration.Configuration = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None) '设置新的字符串内容; config.ConnectionStrings.ConnectionStrings(DataProvi...
{0}", connection.State); Console.WriteLine("ConnectionString: {0}", connection.ConnectionString); } }staticprivatestringGetConnectionString(){// To avoid storing the connection string in your code,// you can retrieve it from a configuration file.return"Data Source=MSSQL1;Initial Catalog=...
usingSystem;usingSystem.Data;usingSystem.Data.SqlClient;classProgram{staticvoidMain(string[] args){using(SqlConnection conn =newSqlConnection("Data Source=(local);Initial Catalog=MySchool;Integrated Security=True;Asynchronous Processing=true;")) { conn.Open();// Get the Meta Data for Supported Sch...
publicoverrideboolTryGetValue(stringkeyword,outobjectvalue); Parameters keyword String The key of the item to retrieve. value Object The value corresponding tokeyword. Returns Boolean trueifkeywordwas found within the connection string; otherwise,false. ...
private static void OpenSqlConnection() { string connectionString = GetConnectionString(); using (SqlConnection connection = new SqlConnection()) { connection.ConnectionString = connectionString; connection.Open(); Console.WriteLine("State: {0}", connection.State); Console.WriteLine("ConnectionString...
using System.Data.SqlClient; using System; using System.Data.SqlClient; class Program { static void Main() { SqlConnectionStringBuilder builder = new SqlConnectionStringBuilder(); builder.ConnectionString = GetConnectionString(); // Call TryGetValue method for multiple // key names. Note that...
con.Open();//获取第一个con中的InnerConnection属性中的值。obj1 = pInfo.GetValue(con,null);using(SqlCommand cm =newSqlCommand("select * from TblStudent", con)) { cm.ExecuteNonQuery(); } con.Close(); } Console.WriteLine("===ok===");using(SqlConnection con =newSqlConnection(constr)...