I have created a LocalDB database in my project and its connection string is :
Data Source=(LocalDB)\v11.0;AttachDbFilename="E:\Projects\visual studio 2013\Projects\sqlce\mydb.mdf";Integrated Security=True;Connect Timeout=30
How should I pass it to SqlConnection()?
Note that it has an address within quotation marks. Have I done anything wrong?
I guess even if I program it correctly it won't work in another computer which doesn't have that .mdf file in that exact place. Isn't it so?
How can I have a program with a portable database so I can easily publish my pp?
Add the mdf file to your solution and and change the property "Copy to Output Directory" to Copy Always. Don't hardcode the mdf file path in connection string. Add the connection string in app.config or web.config file like below:
<connectionStrings>
<add name="DefaultConnection" connectionString="Data Source=(LocalDb)\v11.0;AttachDbFilename=|DataDirectory|\myDB.mdf;Initial Catalog=MyDatabaseName;Integrated Security=True"
providerName="System.Data.SqlClient" />
</connectionStrings>
Then you can access the connection string in your C# code as below:
string conStr = System.Configuration.ConfigurationManager.ConnectionStrings["DefaultConnection"].ToString()
If you face any error regarding accessing the mdf file, the you can set the DataDirectory in your C# code using AppDomain.CurrentDomain.SetData() method.
<connectionStrings>
<add
name="NorthwindConnectionString"
connectionString="Data Source=serverName;Initial
Catalog=Northwind;Persist Security Info=True;User
ID=userName;Password=password"
providerName="System.Data.SqlClient"
/>
</connectionStrings>
you can access by
connString =rootWebConfig.ConnectionStrings.ConnectionStrings["NorthwindConnectionString"];
More about connection string
SqlConnection con = new SqlConnection(connstring);
or you can go in this way like
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["NorthwindConnectionString"].ConnectionString);
Related
I have set the path for sql server in app.config and I want to insert data in the table?
how will I call that connection string?
I want to set this connection as the global connection for my project how will I call it on my each page in the project?
using (SqlConnection Conn = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["YourConfigFileAssignName"].ConnectionString))
{
};
YourConfigFileAssignName is the assigned name of sour connection string in the app.config file.
<connectionStrings>
<add name="YourConfigFileAssignName"
connectionString="Data Source=YourDataSource;Initial Catalog=YourDBname;User ID=SQLid;Password=SQLpass"
providerName="System.Data.SqlClient"/>
</connectionStrings>
i have this statement that highlighted after i debug the program. i don't know how to fix this can someone help me please.
string constr = ConfigurationManager.ConnectionStrings["Server=LUIGEL-PC\\SQLExpress;Database=StudentInfo;Trusted_Connection=Yes"].ConnectionString;
is there a problem with this line? i'm connecting to a localdb.
In this line require key name of this value from web.config
ConfigurationManager.ConnectionStrings["Server=LUIGEL-PC\\SQLExpress;Database=StudentInfo;Trusted_Connection=Yes"].ConnectionString;
As it's not found any key name Server=LUIGEL-PC\\SQLExpress;Database=StudentInfo;Trusted_Connection=Yes in ConnectionStrings node, it's throwing NullReferenceException
Try like this
web.config
<connectionStrings>
<add
name="myConnectionString"
connectionString="Data Source=serverName;Initial
Catalog=Northwind;Persist Security Info=True;User
ID=userName;Password=password"
providerName="System.Data.SqlClient"/>
</connectionStrings>
C#
string connStr = ConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString;
I would like some explanations on how to create and set up a dynamic connection to SQL Server DB engine in a C # project
if you want connection string in config and read it than you need to do like this , put possible connectionstring in config
<connectionStrings>
<add name="CharityManagement"
connectionString="Data Source=.;Initial Catalog=CharityManagement;Integrated Security=True"/>
<add name="CharityManagement_two"
connectionString="Data Source=.;Initial Catalog=CharityManagement_two;Integrated Security=True"/>
</connectionStrings>
and than read it base on condition using configurationmanager class
//to read first connection string
var connectionString=ConfigurationManager.ConnectionStrings["CharityManagement"].ConnectionString;
//to read second connection string
var connectionString=ConfigurationManager.ConnectionStrings["CharityManagement_two"].ConnectionString;
This is what you're after
In the config file
<connectionStrings>
<add name="myConnectionString" connectionString="server=localhost;database=myDb;uid=myUser;password=myPass;" />
</connectionStrings>
Then to read the connection string in your code you will do
string connStr = ConfigurationManager.ConnectionStrings["myConnectionString"].ConnectionString;
Don't forget to use using System.Configuration;
Further reading here
I have this code
SqlConnection sqlConnection = new SqlConnection(System.Configuration.ConfigurationManager.ConnectionStrings["TestStoredProcedure"].ConnectionString);
This is my web.config
<add name="=TestStoredProcedure" connectionString="Data Source=.;Initial Catalog=testSqlServer;Integrated Security=True"/>
I got this exception:
Object reference not set to an instance of an object.
on the connection string line.
You're referencing ConnectionString on something that doesn't exist:
ConnectionStrings["TestStoredProcedure"].ConnectionString
Your config file has =TestStoredProcedure as the name. That doesn't match your code. Remove the =.
Include following namespace line in your header of the page.
using System.Configuration;
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["TestStoredProcedure"].ConnectionString);
Web.Confiq:
<connectionStrings>
<add name="TestStoredProcedure" connectionString="Data Source=.;Initial Catalog=testSqlServer;Integrated Security=True"/>
</connectionStrings>
Also remove '=' from the name of the connection string.
I am working on asp.net c# project, for connection I used:
SqlConnection con = new SqlConnection(#"Data Source=.\SQLEXPRESS;AttachDbFilename=D:\19-02\ABCC\App_Data\abcc.mdf;Integrated Security=True;User Instance=True");
but I want to get this connection string to get configure and be like this, so can any one help how to create this kind of connection.
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["itmall"].ConnectionString);
Demo :
<connectionStrings>
<add name="myConnectionString" connectionString="server=localhost;database=myDb;uid=myUser;password=myPass;" />
</connectionStrings>
Based on your question:
<connectionStrings>
<add name="itmall" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=D:\19-02\ABCC\App_Data\abcc.mdf;Integrated Security=True;User Instance=True" />
</connectionStrings>
Refer links:
http://www.connectionstrings.com/store-connection-string-in-webconfig/
Retrive connection string from web.config file:
write the below code in your file where you want;
string connstring=ConfigurationManager.ConnectionStrings["itmall"].ConnectionString;
SqlConnection con = new SqlConnection(connstring);
or you can go in your way like
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["itmall"].ConnectionString);
Note:
The "name" which you gave in web.config file and name which you used in connection string must be same(like "itmall" in this solution.)
string connectionstring="DataSource=severname;InitialCatlog=databasename;Uid=; password=;"
SqlConnection con=new SqlConnection(connectionstring)
add this in web.config file
<configuration>
<appSettings>
<add key="ConnectionString" value="Your connection string which contains database id and password"/>
</appSettings>
</configuration>
.cs file
public ConnectionObjects()
{
string connectionstring= ConfigurationManager.AppSettings["ConnectionString"].ToString();
}
Hope this helps.
Add this in your web.config file
<connectionStrings>
<add name="itmall"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=D:\19-
02\ABCC\App_Data\abcc.mdf;Integrated Security=True;User Instance=True" />
</connectionStrings>
Add this connection string tag in web.config file:
<connectionStrings>
<add name="itmall"
connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=D:\19-02\ABCC\App_Data\abcc.mdf;Integrated Security=True;User Instance=True"/>
</connectionStrings>
And use it like you mentioned. :)
It occurs when IIS is not being connected to SQL SERVER. For a solution, see this screenshot: