я очень странная проблема, что заставило меня застрял в моем проекте .. я использую C# (SharpDevelop 4.3.3 сборки 9663) ..ошибка при app.config в SharpDevelop для ConnectionString
- Когда я использую строка подключения из app.config i получить ошибку при попытке открыть соединение:
c.Open();
< app.config ================ файл
<?xml version="1.0"?>
<configuration>
<connectionStrings>
<add name="databasecon" connectionString="Data Source=ahmed\\sqlexpress;Initial Catalog=abumanahilms;Integrated Security=True" />
</connectionStrings>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>
Button1 коды .. в этом < =========== ===== form1
void Button1Click(object sender, EventArgs e)
{
string cs=ConfigurationManager.ConnectionStrings["cs"].ToString();
SqlConnection c = new SqlConnection(cs);
SqlCommand sc = new SqlCommand("insert into table1 (money) VALUES ('"+textBox1.Text+"')",c);
SqlDataReader sr;
c.Open();
sr = sc.ExecuteReader();
MessageBox.Show("success");
}
но когда я поставил прямой строки < ================ Form1
string cs="Data Source=ahmed\\sqlexpress;Initial Catalog=test;Integrated Security=True";
он прекрасно работает ...
Ошибка, которую я получаю ------------------------------------------ -------------------------------
System.InvalidOperationException: Instance failure.
at System.Data.SqlClient.TdsParser.Connect(ServerInfo serverInfo, SqlInternalConnectionTds connHandler, Boolean ignoreSniOpenTimeout, Int64 timerExpire, Boolean encrypt, Boolean trustServerCert, Boolean integratedSecurity, Boolean withFailover)
at System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean ignoreSniOpenTimeout, TimeoutTimer timeout, Boolean withFailover)
at System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(ServerInfo serverInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString connectionOptions, SqlCredential credential, TimeoutTimer timeout)
at System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(TimeoutTimer timeout, SqlConnectionString connectionOptions, SqlCredential credential, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance)
at System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions)
at System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions options, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnectionOptions options, DbConnectionPoolKey poolKey, DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnectionOptions userOptions)
at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection)
at System.Data.ProviderBase.DbConnectionClosed.TryOpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions)
at System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry)
at System.Data.SqlClient.SqlConnection.Open()
at teeest.MainForm.Button1Click(Object sender, EventArgs e) in c:\Users\Ahmed Albusaidi\Documents\SharpDevelop Projects\teeest\teeest\MainForm.cs:line 59
at System.Windows.Forms.Control.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnClick(EventArgs e)
at System.Windows.Forms.Button.OnMouseUp(MouseEventArgs mevent)
at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.ButtonBase.WndProc(Message& m)
at System.Windows.Forms.Button.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
at System.Windows.Forms.Application.Run(Form mainForm)
at teeest.Program.Main(String[] args) in c:\Users\Ahmed Albusaidi\Documents\SharpDevelop Projects\teeest\teeest\Program.cs:line 27
2) Я также попытался взять connectionstring из текстового файла
string cs= File.ReadAllText("connectionstring.txt").ToString();
также:
string cs= File.ReadAllText("connectionstring.txt");
я получить точно такую же ошибку :)
Я надеюсь получить помощь .. Спасибо заранее :)
Если вы публикуете фактическую ошибку, и какая строка вызывает ее, которая поможет вам помочь. –
я упомянул все возможное .. ошибки только в одной ситуации .. и когда появляется ошибка, она указывает на c.Open(); строка кода .. как упоминалось выше .. спасибо за вашу озабоченность .. –
не должна эта строка 'string cs = ConfigurationManager.ConnectionStrings [" cs "]. ToString();' be 'string cs = ConfigurationManager.ConnectionStrings [ databasecon "] ToString();.'? – har07