How do I...save and edit or update and read connection string in the application configuration file

Question

0.00/5 (No votes)

See more:

hi
please help me

How do I...save and edit or update and read connection string in the "application configuration file" or app.config

Posted 5-Oct-14 22:16pm

NorouziFar

Add a Solution

4 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Avinash502 · Answer 1 · 2014-10-05T23:12:00

ExeConfigurationFileMap fileMap = new ExeConfigurationFileMap();

//StartPath means path of app.config file generally presents in bin folder
fileMap.ExeConfigFilename = StartPath + \\YourApp.exe.config;

// Open config file
Configuration config = ConfigurationManager.OpenMappedExeConfiguration(fileMap, ConfigurationUserLevel.None);

//For Reading the values from app.config file
string KeyValue = config.AppSettings.Settings["KeyName"].Value;

//For removing the key
config.AppSettings.Settings.Remove("KeyName");

//For Adding the Key
config.AppSettings.Settings.Add("KeyName", "Valuetopass"); 

//After any changes in Config file need to save as follows
config.Save(ConfigurationSaveMode.Full);

Dominic Burford · Answer 2 · 2014-10-06T04:03:00

To read a connection string I have a function that does that. I pass in the name of the connection and it returns the connection string.

C#

public string GetConnectionStringsValue(string key)
        {
            string configFile = AppDomain.CurrentDomain.SetupInformation.ConfigurationFile;
            
            string result = string.Empty;
            if (!string.IsNullOrEmpty(key))
            {
                ConnectionStringSettings connSettings = ConfigurationManager.ConnectionStrings[key];
                if (connSettings != null)
                {
                    result = connSettings.ConnectionString;
                }
            }
            
            return result;
        }

CB Sharma · Answer 3 · 2014-10-10T03:46:00

Solution 7

Hello

May be the following link is useful to you.

Configuring a Connection String in the App.Config File During Runtime in C#[^]

Posted 10-Oct-14 3:46am

CB Sharma

Dominic Burford · Answer 4 · 2014-10-06T21:31:00

C#

public void UpdateConfigFile(string key, string value)
        {
            Configuration config = ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None);
            config.AppSettings.Settings.Remove(key);
            config.AppSettings.Settings.Add(key, value);
            config.Save(ConfigurationSaveMode.Minimal);
            ConfigurationManager.RefreshSection("appSettings");
        }

This code snippet updates a value in the config (by removing it and then adding it) and then refreshes the section that contains the value (in this case the assSettings section).

How do I...save and edit or update and read connection string in the application configuration file

4 solutions

Solution 1

Solution 2

Solution 7

Solution 3

Add your solution here

Preview 0