無法使用連接字符串連接到本地 SQL Server DB，但 VS 可以

Question

我正在嘗試使用連接字符串通過 Visual Studio 15 連接到本地 Sql Server 2012 數據庫實例。 雖然我已經能夠通過 Visual Studio SQL Server 對象資源管理器連接到數據庫並成功運行測試過程，但我無法使用連接字符串在我的項目中這樣做。

這是我的連接字符串，由 SQL Server 對象資源管理器提供

<connectionStrings>    
  <add name="objConnLocal" 
connectionString="Data Source=DESKTOPIVO;Integrated Security=True;Initial Catalog=tnk;Connect Timeout=15;Encrypt=False;TrustServerCertificate=False;ApplicationIntent=ReadWrite;MultiSubnetFailover=False;"providerName="System.Data.SqlClient"/>
</connectionStrings>

這是我的代碼，可以完美地使用 Azure 給定的連接字符串連接到 Azure DB（代碼有效）

public class DbConn
{

public static string DatabaseConnectionString = System.Configuration.ConfigurationManager.ConnectionStrings["objConnLocal"].ConnectionString;
    public static SqlConnection objConn = new sqlConnection(DatabaseConnectionString);



public void spCMSSelectTest(out DataSet ds)
{
    ds = new DataSet("buttons");
    SqlDataAdapter objDataAdapter = new SqlDataAdapter();
    SqlCommand cmd = new SqlCommand("spCMSSelectTest", DbConn.objConn);
    cmd.CommandType = CommandType.StoredProcedure;
    cmd.Connection.Open();
    objDataAdapter.SelectCommand = cmd;
    objDataAdapter.Fill(ds);
    cmd.Connection.Close();
}
}

這是我嘗試連接的數據庫：

這是我嘗試訪問的測試頁面：

 protected void Page_Load(object sender, EventArgs e)
{
    DataSet ds;
    try
    { 
    dbc.spCMSSelectTest(out ds);

        lblTest.Text = ds.Tables[0].Rows.Count.ToString();
    }
    catch (Exception easd)
    {
        lblTest.Text = easd.ToString();
    }

}

我一直在這里和谷歌上尋找答案，但似乎沒有什么對我有用。 我錯過了什么？

編輯：有錯誤：

System.Data.SqlClient.SqlException (0x80131904)：用戶“IIS APPPOOL\\DefaultAppPool”登錄失敗。 在 System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity identity, SqlConnectionString connectionOptions, SqlCredential credential, Object providerInfo, String newPassword, SecureString newSecurePassword, Boolean redirectedUserInstance, SqlConnectionString userConnectionOptions, SessionData reconnectSessionData, DbConnectionPool System and String AccessToken at .Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions 選項, DbConnectionPoolKey poolKey, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection owningConnection, DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnectionPool pool, DbConnection owningKey, PoolConnectionOptions) DbConnectionOptions userOptions) 在 System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionIn 內部 oldConnection) 在 System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection owningObject, DbConnectionOptions userOptions, DbConnectionInternal oldConnection) 在 System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, DbConnectionOptions userOptions, DbConnectionInternal oldConnection)連接）在 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, DbConnectionOptions userInOptions DbConnectionInternal& connection) 在 System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection externalConnection, DbConnectionFactory connectionFactory, TaskCompletio 1 retry, DbConnectionOptions userOptions) at System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource 1 重試) 在 System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 重試) 在 System.Data.SqlClient.SqlConnection.Open()在 DbConn.spCMSSelectTest(DataSet& ds) in c:\\inetpub\\wwwroot\\CMS\\App_Code\\DbConn.cs:line 22 at index.Page_Load(Object sender, EventArgs e) in c:\\inetpub\\wwwroot\\CMS\\index2.aspx .cs:line 18 ClientConnectionId:d576fae4-db3d-451d-8436-2abe003c01f0 錯誤號:18456,State:1,Class:14

Answer 1

您正在以受信任的用戶（默認）身份登錄 - 該用戶是池用戶 IIS APPPOOL\\DefaultAppPool，您需要以您的身份登錄，或者使用 SQL 登錄。 因為它在池下運行時不使用與桌面上相同的憑據。

Answer 2

你缺少數據庫。

將Initial Catalog=tnk添加到您的連接字符串。