Question

Hi all I want to check if my opened connection is same as the connection string from config file.

I was trying something like this:

if(con.ConnectionString == ConfigurationManager.ConnectionStrings["Con1"].ConnectionString);

The first part is giving me right value and second part should give me the same string.

EDIT:
This is my entire connection string as I didn’t want to bother you with the details:

if (DateTime.Now.Subtract(lastDBcheck).TotalSeconds > 10 && con.ConnectionString==ConfigurationManager.ConnectionStrings["Con1"].ConnectionString)

Answer 1

Using == to compare the values of strings is correct in C#.

If your code isn’t working it’s most likely due to either:

• The values aren’t actually the same (maybe one has extra whitespace or a small change).
• You are getting an exception.

To avoid the latter case I suggest that you check that your objects are not null before dereferencing them.

var con1 = ConfigurationManager.ConnectionStrings["Con1"];

if (con != null && con1 != null && con.ConnectionString == con1.ConnectionString) {
    // Connection strings are the same.
}