Getting sql connection string from web.config file
Solution 1
That's because the ConnectionStrings
collection is a collection of ConnectionStringSettings
objects, but the SqlConnection
constructor expects a string
parameter. So you can't just pass in constring
by itself.
Try this instead.
SqlConnection sql = new SqlConnection(constring.ConnectionString);
Solution 2
You can simply give a Name
to your ConnectionString
in web.config
file and do this:
web.config:
<add name="ConnectionStringName" connectionString=YourServer"; Initial Catalog=YourDB; Integrated Security=True"/>
Code Behind:
SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionStringName"].ToString());
Solution 3
try this
readonly SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["northwindconnect"].ToString());
Comments
-
A_AR about 4 years
I am learning to write into a database from a textbox with the click of a button. I have specified the connection string to my NorthWind database in my
web.config
file. However I am not able to access the connection string in my code behind.This is what I have tried.
protected void buttontb_click(object sender, EventArgs e) { System.Configuration.Configuration rootwebconfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("/Mohtisham"); System.Configuration.ConnectionStringSettings constring; constring = rootwebconfig.ConnectionStrings.ConnectionStrings["northwindconnect"]; SqlConnection sql = new SqlConnection(constring); sql.Open(); SqlCommand comm = new SqlCommand("Insert into categories (categoryName) values ('" + tb_database.Text + "')", sql); comm.ExecuteNonQuery(); sql.Close(); }
I get a tooltip error for
SqlConnection sql = new SqlConnection(constring);
as
System.data.SqlClient.Sqlconnection.Sqlconnection(string) has some invalid arguments.
I want to load the connection string from the
web.config
inconstring