Solved

connection string c#

Posted on 2015-01-24
2
87 Views
Last Modified: 2015-02-24
How can I achieve below

private static MySqlConnection  con = null;
private static SqlConnection con = null;

con will be same.
0
Comment
Question by:rnsr
2 Comments
 
LVL 32

Accepted Solution

by:
Daniel Wilson earned 250 total points
ID: 40568203
Are you trying to use the same con variable regardless of which type it is?

If they both inherit from the same type, you can declare the variable as the parent type, then instantiate it as a child type.  Checking the inheritance ...
https://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlconnection(v=vs.110).aspx
and
http://dev.mysql.com/doc/connector-net/en/connector-net-programming-connecting-open.html

Obviously the Microsoft version inherits system.Data.Common.DbConnection.  I can't tell from documentation about the MySql one.  If it does also, this would look like
private static DbConnection con = null;

if (ShouldUseMicrosoft) con = new SqlConnection();
if (ShouldUseMySql) con = new MySqlConnection();

Open in new window


Thereafter you could use con for any method calls defined on DbConnection.

Considering how many methods are specific to these DB connection classes, I don't think you'll find it as satisfactory as it theoretically should be.  But ... that at least gets you exploring the possibilities.
0
 
LVL 40

Assisted Solution

by:Jacques Bourgeois (James Burger)
Jacques Bourgeois (James Burger) earned 250 total points
ID: 40569433
Variables are null until you initialize them. So the following is sufficient:

private static MySqlConnection  con;
private static SqlConnection con;
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

With most software applications trying to cater to multiple user needs nowadays, the focus is to make them as configurable as possible. For e.g., when creating Silverlight applications which will connect to WCF services, the service end point usuall…
What my article will show is if you ever had to do processing to a listbox without being able to just select all the items in it. My software Visual Studio 2008 crystal report v11 My issue was I wanted to add crystal report to a form and show…
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
Microsoft Active Directory, the widely used IT infrastructure, is known for its high risk of credential theft. The best way to test your Active Directory’s vulnerabilities to pass-the-ticket, pass-the-hash, privilege escalation, and malware attacks …

808 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question