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Connection String error in C#


Connection String error in C#

By : user2948064
Date : November 14 2020, 04:48 PM
I hope this helps you . Please check your SQL Server Browser service is running by using SQL Server Configuration Manager and please check the network protocols as per below image:
code :


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Elmah - ASP.NET -> Multiple Connection Strings -> Set SQL Error Log Connection String in Code

Elmah - ASP.NET -> Multiple Connection Strings -> Set SQL Error Log Connection String in Code


By : Adrian Anton
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , Since Elmah is open-source it would be easy to add your own :-)
All you would need to do was to add a new static property to the SqlErrorLog class that would contain the connection string you wanted to use and then you would update the SqlErrorLog.ConnectionString property to return your custom connection string if it had a value.
code :
public static string CustomConnectionString { get; set; }

public virtual string ConnectionString
{
  get 
  { 
    if (string.IsNullOrEmpty(CustomConnectionString)) 
    {
      return _connectionString;
    }
    else
    {
      return CustomConnectionString; 
    }
  }
}
ASP, DSN-Less connection, connection string syntax gives Data source name not found error

ASP, DSN-Less connection, connection string syntax gives Data source name not found error


By : Steve Cleveland
Date : March 29 2020, 07:55 AM
Does that help sDSN = "Provider=SQLNCLI;Server=SERVER\INSTANCE;Database=exampleDB;Uid=admsa; Pwd=sa;" makes it work
Automatically switching connection string on database connection error

Automatically switching connection string on database connection error


By : Shivani Agrawal
Date : March 29 2020, 07:55 AM
I hope this helps you . The DbContext constructor accepts either the name of the connection string, or the actual connection string you want to choose.
What you could do, is test your initial connection string - maybe with a quick ado connection or something simple, and then if it connects use it, otherwise connect using your other one.
code :
        YourDbContext YourContext;
        if (TestConnection())
        {
            YourContext = new YourDbContext("ConnectionString1");
        }
        else
        {
            YourContext = new YourDbContext("ConnectionString2");
        }
What is the root error behind "Failed to establish a database connection. Check connection string, username and pas

What is the root error behind "Failed to establish a database connection. Check connection string, username and pas


By : stav8197
Date : March 29 2020, 07:55 AM
I wish this helpful for you There is a known bug which causes problems with jdbc connections using hostnames. Try using an Ip address instead.
Bizarre, but true.. I lost almost 2 days with this bug....
ERROR: Unknown connection option in connection string: attachdbfilename

ERROR: Unknown connection option in connection string: attachdbfilename


By : Nasir Zia
Date : March 29 2020, 07:55 AM
this will help Turns out I was not using the compact version of SQL (SqlCeConnect)
so I need to use SqlConnect instead
code :
SqlConnection Con = new SqlConnection("Data Source=.\\SQLEXPRESS;AttachDbFilename=|DataDirectory|\\PalisadeWorldDatabase.mdf;Integrated Security=True;User Instance=True");
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