I am new to SQL Server.
I am trying to connect to a remote SQL Server 2012 through my node js express application in VS 2012 with the following connection string.
var config = "Server={IPv4 add};Database=Dbname;Uid=domain\\username;Pwd=password";
I want to take in the values of username & password dynamically through a HTML form.
I store the entries in variables 'uid' & 'pwd' through app.post() of express and when I do this
var config = '"Server={IPv4 add};Database=Dbname;Uid=domain\\' + uid + ';Pwd=' + pwd+'"';
it throws an error in the console saying
Invalid connection String
and when I do this (removing " ")
'Server={IPv4 add};Database=Dbname;Uid=domain\\' + uid + ';Pwd=' + pwd;
The error is
Untrusted domain and cannot be used with windows authentication
I have been querying MySQL this way all the time. I tried this because I thought SQL Server might work the same way. Please tell me from where can I read about this & make it work.
Thank you
EDIT1 : I am using Windows authentication
I solved this. It was simply because of the asynchronous running, the config statement ran before the credentials were being entered. Silly mistake. Sorry for bothering you
Related
I'm deploying a web application using IIS and ASP.NET CORE.
I setup a "appsetting.json" file that include a connection string to sql server.
So far, any variation I've tried didn't work.
The strange thing about it, is that it works perfectly on a my local machine, but when I deploy it and send an HTTPPost, log file says there's an error using connection to database on server.
Well, I tried all variations I could think of.
Current connection string generated by Visual Studio is :
Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Swap;Integrated
Security=True;Connect Timeout=30;Encrypt=False;
TrustServerCertificate=False;
ApplicationIntent=ReadWrite;MultiSubnetFailover=False
I've tried changing the "Integrated Security" to False.
I've tried to replace it with User ID and password (of "sa" user).
I've tried adding a "Initial Catalog" property and set it to my database.
I'm preety sure the startup of the app is fine, because when I try to send a GET request to the main page, everything seems fine.
When I send a POST request and asks the DBcontext to Add and SaveChanges, it shows this error :
fail: Microsoft.EntityFrameworkCore.Database.Connection[20004]
An error occurred using the connection to database 'Swap' on server
'(localdb)\MSSQLLocalDB'.
This is the function that I tried to send a HTTPPost request to:
byte[] j = new byte[(int)Request.ContentLength];
Request.Body.Read(j, 0, (int)Request.ContentLength);
string str = Encoding.ASCII.GetString(j);
TokenSet tokenSet = new TokenSet {Token = str };
sqlTokensetData.Add<TokenSet>(tokenSet);
sqlTokensetData.SaveChanges();
HttpClient notificationSender = new HttpClient();
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post,
"https://fcm.googleapis.com/fcm/send");
request.Headers.TryAddWithoutValidation("Authorization", "key="
<somekey>);
request.Headers.TryAddWithoutValidation("Sender", "id=<id>");
Message pushNotification = new Message(new string[] { str }, "Success!"
<somestring>);
request.Content = new
StringContent(JsonConvert.SerializeObject(pushNotification)
,Encoding.UTF8,"application/json");
HttpResponseMessage output = await notificationSender.SendAsync(request);
Log file error:
https://anotepad.com/notes/9a8jxa
I hope that the "str" string will be inserted to the database.
Thank you.
Well, Basicly, Thanks to the comments above I've managed to solve it.
What you need to do if you come by the same error:
1.Download SQL Server Express -
https://www.microsoft.com/en-us/sql-server/sql-server-editions-express as said above.
and configure the SQL Server however you see fit.
2.Configure sa user, set password and enable it.
3. If SQL Authentication doesn't work, then in Microsoft SQL Server Management Studio -> Right-click the server -> Properties -> Server Authentication -> Change to SQL Server and Windows Authentication
4. Change connection string to :
Data Source=;Initial Catalog=User ID=sa;
Password=;
Connect Timeout=30;Encrypt=False;TrustServerCertificate=False;
ApplicationIntent=ReadWrite;MultiSubnetFailover=False
It worked for me.
I Have strange problem when i tried to publish my asp.net mvc application to my local (pc) iis with "Always Encrypted" Enabled.
My application keep timeout when i tried to access database using EF6 at local IIS (not express) :
But if i tried to access & debug my asp.net mvc app using Visual Studio 2017, database with 'always encrypted enabled' can be accessed perfectly without timeout.
And also i can access it with SQL Management Studio without problem.
Both (SMSS & ASP.NET web config) using this configuration.
Column Encryption Setting=enabled;
Note : I'm using ASP.NET MVC 5 & EF 6, SQL Server 2016 Developer Edition.
Sorry for my bad english.
UPDATED :
I have tried using .NET Framework Data Provider to see if there's any clue that'll help me solving this issue, Using following code :
var context = new TestDevEntities();
StringBuilder sb = new StringBuilder();
string connectionString = context.Database.Connection.ConnectionString;
using (SqlConnection connection = new SqlConnection(connectionString))
{
connection.Open();
using (SqlCommand cmd = new SqlCommand(#"SELECT [id],[name],[CCno] FROM [TestDev].[dbo].[testEncCol]", connection, null, SqlCommandColumnEncryptionSetting.ResultSetOnly))
{
using (SqlDataReader reader = cmd.ExecuteReader())
{
if (reader.HasRows)
{
while (reader.Read())
{
sb.Append(reader[2] + ";");
}
}
}
}
}
above code show me this error :
Now, with this kind of error i know i exactly i must do :)
Change the identity of application pool to the 'user' who previously generated the certificate.
Export currentuser cert (used by always encrypted) and import to the user that you want to use as application pool identity.
Now its worked!
EF should throw some kind of error as clear as .NET Data Providers do, instead of timeout failure that really confuse me #_#
UPDATED (1) :
Now the question is how to use it (Certificate) with default ApplicationPoolIdentity instead of custom account?
UPDATED (2) :
I have done what jakub suggest, but still no luck.
Thanks
One way (could be the only way) to use the DefaultAppPool identity instead of a custom (user) account is to store the certificate in the Local Machine certificate store (not Current User).
Once you create a certificate in the Local Machine certificate store, you need to grant DefaultAppPool access to the cert. You can do that using Microsoft Management Console (and the plugin for Local Computer certs):
Right click on the cert, select All Tasks > Manage Private Keys.
Click Add.
Set location to your computer (not your domain).
Enter IIS AppPool\DefaultAppPool as the object name.
Click OK twice.
I don't know much about databases - Sorry if the question seems silly.
I have sql server 2012 on my machine and i create simple database table.
I want to connect to this database table thru C# code.
So, I need to know my ConnectionString.
I don't understand the parameters of the ConnectionString.
I try to google it - but still didn't find any good explanation.
Anyone can please explain the connectionString fields ?
How to define the connectionString that i will be able to connect the local database ?
thanks
Your connection string should be as simple as like below
Data Source=.;Initial Catalog=DB_NAME;Integrated Security=True"
Where
Data Source=. means local database
Initial Catalog=DB_NAME means the database it will connect to
Integrated Security=True means it will use windows authentication (no user name and password needed; it will use logged in credential)
Take a look Here
(OR)
Search in Google with key term sqlconncectionstring which will fetch you many help.
EDIT:
You are getting exception cause Initial Catalog=DB_Name\Table_001. It should be Initial Catalog=DB_Name (only database name). Provide the table name in sql query to execute. Check some online tutorial to get more idea on the same.
You use . in data source only when you are connecting to local machine database and to the default SQL Server instance. Else if you are using different server and named SQL Server instance then your connection string should look like
using(SqlConnection sqlConnection = new SqlConnection())
{
sqlConnection.ConnectionString =
#"Data Source=Actual_server_name\actual_sqlserver_instance_name;
Initial Catalog=actual_database_name_Name;
Integrated Security=True;";
sqlConnection.Open();
}
In case you are using local machine but named SQL Server instance then use
Data Source=.\actual_sqlserver_instance_name;
Initial Catalog=Actual_Database_NAME;Integrated Security=True"
using System.Data.SqlClient;
Then create a SqlConnection and specifying the connection string.
SqlConnection myConnection = new SqlConnection("user id=username;" +
"password=password;server=serverurl;" +
"Trusted_Connection=yes;" +
"database=database; " +
"connection timeout=30");
Note: line break in connection string is for formatting purposes only
SqlConnection.ConnectionString
The connection string is simply a compilation of options and values to specify how and what to connect to. Upon investigating the Visual Studio .NET help files I discovered that several fields had multiple names that worked the same, like Password and Pwd work interchangeably.
User ID
The User ID is used when you are using SQL Authentication. In my experience this is ignored when using a Trusted_Connection, or Windows Authentication. If the username is associated with a password Password or Pwd will be used.
"user id=userid;"
Password or Pwd
The password field is to be used with the User ID, it just wouldn't make sense to log in without a username, just a password. Both Password and Pwd are completely interchangeable.
"Password=validpassword;"-or-
"Pwd=validpassword;"
Data Source or Server or Address or Addr or Network Address
Upon looking in the MSDN documentation I found that there are several ways to specify the network address. The documentation mentions no differences between them and they appear to be interchangeable. The address is an valid network address, for brevity I am only using the localhost address in the examples.
"Data Source=localhost;"
-or-
"Server=localhost;"
-or-
"Address=localhost;"-or-"Addr=localhost;"
-or-"Network Address=localhost;"
Integrated Sercurity or Trusted_Connection
Integrated Security and Trusted_Connection are used to specify wheter the connnection is secure, such as Windows Authentication or SSPI. The recognized values are true, false, and sspi. According to the MSDN documentation sspi is equivalent to true. Note: I do not know how SSPI works, or affects the connection.
Connect Timeout or Connection Timeout
These specify the time, in seconds, to wait for the server to respond before generating an error. The default value is 15 (seconds).
"Connect Timeout=10;"-or-
"Connection Timeout=10;"
Initial Catalog or Database
Initial Catalog and Database are simply two ways of selecting the database associated with the connection.
"Inital Catalog=main;"
-or-
"Database=main;"
I cannot connect to my local sql server using the following line
conn = SqlConnection("server=(local);uid=tedpottel;pwd=#######;database=by")
I have security set to Windows Authentication , so my other programs (reporting services and cold fusion do not take in a password. (as long as I log in as tedpottel) So I tried
conn = SqlConnection("server=(local);database=by")
which said "failed for user''"
If you do windows authentication, you don't need userID and password
You need to add ;Trusted_Connection=True, it would look like this
Server=(local);Database=by;Trusted_Connection=True;
see here http://connectionstrings.com/sql-server-2008
Are you sure that you have Mixed Authentication enabled:
and are you sure that you are typing in the password correctly as well?
I have some Crystal Reports connecting to a Sql Server db that I would like to detect whether the connection is trusted or whether I need to supply the log on info (reports are not supplied by me so I can't control the connect method). If I just blindly supply login credentials, it won't connect if it is a trusted connection.
The following does not work:
oRpt = oCR.OpenReport("C:\MyReport.rpt")
if oRpt.Database.Tables(1).ConnectionProperties.Item("Integrated Security") = True then
'trusted connection
else
'supply login credentials
end if
It gives the following error:
Operator '=' is not defined for type 'IConnectionProperty' and type 'Boolean'.
I cannot find how create a construct in vb.net for IConnectionProperty. I can't find any documents from Crystal that explain it.
I am using Crystal Reports XI - Developer
I think i found the answer. By using the property ConnectBufferString
Like this:
Console.WriteLine(oRpt.Database.Tables(1).ConnectBufferString.ToString)
It will give you a string like this
Provider=SQLOLEDB;;Data Source=MYPC\SQLEXPRESS;;Initial Catalog=sample_db;;User ID=;;Password=;;Integrated Security=-1;;Use DSN Default Properties=0;;Locale Identifier=1033;;Connect Timeout=15;;General Timeout=0;;OLE DB Services=-5;;Current Language=;;Initial File Name=;;Use Encryption for Data=0;;Replication server name connect option=;;Tag with column collation when possible=0
You just look for the following:
Integrated Security=-1 = Trusted Connection
Integrated Security=0 = Untrusted Connection
Hope this helps someone else since I wasted a few hours looking.