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Question
Získanie reťazca pripojenia z App.config
var connection = ConnectionFactory.GetConnection(
ConfigurationManager.ConnectionStrings["Test"]
.ConnectionString, DataBaseProvider);A toto je môj App.config:
<?xml version="1.0" encoding="utf-8" ?>
<configuration>
<connectionStrings>
<add name="Test" connectionString="Data Source=.;Initial Catalog=OmidPayamak;Integrated Security=True" providerName="System.Data.SqlClient" />
</connectionStrings>
</configuration>Ale keď môj projekt beží, toto je moja chyba:
Object reference not set to an instance of an object.
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This question has 1 odpoveď in English, to read them log in to your account.
Nemôžete jednoducho urobiť nasledovné:
var connection =
System.Configuration.ConfigurationManager.
ConnectionStrings["Test"].ConnectionString;Vaša zostava tiež potrebuje odkaz na System.Configuration.dll
Tiež skontrolujte, či ste do svojich odkazov zahrnuli dll System.Configuration. Bez nej nebudete mať prístup k triede ConfigurationManager v mennom priestore System.Configuration.
Vyskúšali ste:
var connection = new ConnectionFactory().GetConnection(
ConfigurationManager.ConnectionStrings["Test"]
.ConnectionString, DataBaseProvider);
