Use and call the connection string in the forms/ c#

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I'm building desktop application using c# , I put the connection string in the app.config file like this

C#

<connectionStrings>
       <add name="ComputerManagement"
       connectionString="Provider=Microsoft.ACE.OLEDB.12.0; Data Source=...;Initial Catalog=Computersh;Integrated Security=True"/>
     </connectionStrings>

How I can call the connection string in the forms ? or is it better to make a class for connection string and how I can do that ?

Posted 19-Feb-13 1:10am

Lotus90

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Ksh_Sr · Answer 1 · 2013-02-19T01:36:00

Solution 1

You can call the connection from app.config with below code

1.)add namespace
using System.Configuration

2.)Add reference to your project for System.Configuration

3.)You will get connection string in your form with below code
string conntr = ConfigurationManager.ConnectionStrings["ComputerManagement"].ConnectionString;

Happy coding :)

Posted 19-Feb-13 1:36am

Ksh_Sr

Comments

Lotus90 19-Feb-13 7:54am

I did that ; but when I add it to my form and want to write an insertion query inside a button ;
It doesn't connect to the database ?

[no name] 19-Feb-13 8:01am

can you post ur connection code here...

Lotus90 19-Feb-13 10:46am

public string GetConnectionString()
{

return System.Configuration.ConfigurationManager.ConnectionStrings["ComputerManagement"].ConnectionString;

}
private void button1_Click(object sender, EventArgs e)
{
try
{
OleDbConnection conn = new OleDbConnection(GetConnectionString());
OleDbCommand command = new OleDbCommand();

command.CommandType = CommandType.Text;

conn.Open();
command = conn.CreateCommand();
command.CommandText = "INSERT INTO Clients(C_name,C_phone ,C_mob ,C_add , C_email ,C_account) VALUES ('" + textBox1.Text + "','" + textBox2.Text + "','" + textBox3.Text + "','" + textBox4.Text + "','" + textBox5.Text + "','" + textBox6.Text + "')";
command.ExecuteNonQuery();

conn.Close();
}
catch (Exception) { throw; }

Ankur^\m/ · Answer 2 · 2013-02-19T01:42:00

Solution 2

I am sure you didn't search the web before posting the question here. Try this - using connection string in app.config[^]

Posted 19-Feb-13 1:42am

Ankur^\m/

Comments

Lotus90 19-Feb-13 7:54am

I search the web and I don't get what I want :)

Orcun Iyigun 19-Feb-13 9:29am

Try harder!! because you have the answers here. I am sure it is something you are doing wrong

Lotus90 19-Feb-13 10:48am

Yea . I'm sure too , still not detect it !