C# 尝试打开SQL连接时请求权限错误

我有一个Visual Studio 2012 SQL Server数据库项目，目标是SQL Server 2012，它添加了一个存储过程。我可以调试和发布项目。SP可以工作，因为我可以传入一个值，在代码中修改它，然后返回修改后的值。我遇到的问题是，当我尝试在一个单独的SQL实例上打开到另一个数据库的连接（SqlConnection.open）时，我会遇到以下错误

请求“System.Data.SqlClient.SqlClientPermission，System.Data，Version=4.0.0，Culture=neutral，PublicKeyToken=b77a5c561934e089”类型的权限失败

抛出此错误的代码在控制台应用程序中运行良好

我是SQL Server DB项目的新手，希望能得到任何帮助。我已经找到了一个解决方案，但我已经找到了任何相关的东西。顺便说一句，这是我第一次发帖

这会引发错误：

public partial class StoredProcedures
{

   [Microsoft.SqlServer.Server.SqlProcedure]
   public static SqlInt32 SqlStoredProcedure3 (SqlInt32 inInt, out SqlInt32 outInt)
   {
       SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
       connBuilder.DataSource = "mySqlInstance";
       connBuilder.InitialCatalog = "myDbName";
       connBuilder.IntegratedSecurity = false;
       connBuilder.UserID = "myUserName";
       connBuilder.Password = "myPW";
       SqlConnection sqlCn = new SqlConnection(connBuilder.ConnectionString);
       sqlCn.Open();
   }
}

class Program
{
    static void Main(string[] args)
    {
        SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
        connBuilder.DataSource = "mySqlInstance";
        connBuilder.InitialCatalog = "myDbName";
        connBuilder.IntegratedSecurity = false;
        connBuilder.UserID = "myUserName";
        connBuilder.Password = "myPW";
        SqlConnection sqlCn = new SqlConnection(connBuilder.ConnectionString);
        sqlCn.Open();
    }
}

这是有效的：

public partial class StoredProcedures
{

   [Microsoft.SqlServer.Server.SqlProcedure]
   public static SqlInt32 SqlStoredProcedure3 (SqlInt32 inInt, out SqlInt32 outInt)
   {
       SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
       connBuilder.DataSource = "mySqlInstance";
       connBuilder.InitialCatalog = "myDbName";
       connBuilder.IntegratedSecurity = false;
       connBuilder.UserID = "myUserName";
       connBuilder.Password = "myPW";
       SqlConnection sqlCn = new SqlConnection(connBuilder.ConnectionString);
       sqlCn.Open();
   }
}

class Program
{
    static void Main(string[] args)
    {
        SqlConnectionStringBuilder connBuilder = new SqlConnectionStringBuilder();
        connBuilder.DataSource = "mySqlInstance";
        connBuilder.InitialCatalog = "myDbName";
        connBuilder.IntegratedSecurity = false;
        connBuilder.UserID = "myUserName";
        connBuilder.Password = "myPW";
        SqlConnection sqlCn = new SqlConnection(connBuilder.ConnectionString);
        sqlCn.Open();
    }
}

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Visual Studio 2012中的SSDT版本非常旧-请下载最新的SSDT，如果您没有Visual Studio 2015，则它将下载比2012版本更好的shell

SSDT的当前版本与SQL 2012（2005年以上）配合使用，因此没有理由坚持使用旧版本