string connStr = ConfigurationSettings.AppSettings("m圜onnectionString") To read the connection string from code, use the ConfigurationSettings class. In the appSettings location, add a key named whatever you like to reference your connection string to. Īdding at top in the connectionStrings section is usually a good practice to make sure no other connection strings are bubbling down from a higher level configuration file. You can clear connection strings defined earlier in the hierarchy to make sure any unwanted settings don't bubble down to your desired value. In order to develop the Default.aspx you can follow these steps: Add a new web form called Default.aspx (if it doesnt exists) Drag and drop an SQL Data Source control and configure it to select CustomerID and Company columns. C#Ĭlear connection strings coming from higher level config filesĬonfiguration files are hierarchical, with nfig being at the highest level. The Figure 1 shows Login.aspx in the browser: Figure 1: Login.aspx in the browser. Then include the namespace System.Configuration to get access to the ConfigurationManager class. Remember to add a reference to the System.Configuration component. To read the connection string into your code, use the ConfigurationManager class. Instead use the connectionStrings section in web.config. ConfigurationManager.ConnectionStrings'MyDbCon'.ConnectionString In the same way if you want to decrypt the configuration section in web.config file use following command, For File System Application the command will be aspnetregiis.
KeyVaultSecret secret = client.GetSecret("") Ĭonsole.Do not use the appSettings section in web.config. In ASP.Net Web applications, one has to reference the System.Configuration Assembly in order to read Connection String value from the Web.Config file.
Var client = new SecretClient(vaultUri: new Uri(keyVaultUrl), credential) Here Mudassar Ahmed Khan has explained with an example, how to use Connection String from Web.Config file in ASP.Net using C and VB.Net by reading the value of the Connection String from the ConnectionStrings section of the Web.Config. Retrieving a secret is as simple as this:įor Azure Key Vault: var keyVaultUrl = " var credential = new DefaultAzureCredential() When using a secret management service, no secrets or decryption key or algorithm is stored in your source code. Instead you should be using a "secrets manager" service - it's a secure online service that can store your passwords and lets you retrieve them when needed. Storing secrets (like connection strings, passwords, API keys) in config files is strongly discouraged as it's a very insecure practice. It would be dangerous to assume that even a junior developer won't be able to just debug the code, step through the decryption and get the unencrypted string at the end. The problem with your approach is that your app will need to contain both decryption key and decryption algorithm in order to decrypt and use the connection string.
See my Microsoft TechNet article: SQL Server database login for Windows Forms (C#) and GitHub source code repository. To get the connection string (here it's called ConnectionString) var mainConnection = "" To protect if (!_operations.IsProtected()) NET use the name app.config by default for the configuration file. New ConnectionProtection(Application.ExecutablePath) Different type of connection string for connecting vb.net to different data sources. Return EncryptConnectionString(false, FileName) Ĭreate an instance of the class private ConnectionProtection _operations = Return EncryptConnectionString(true, FileName) If ((!encrypt) & ) //encrypt is true so encryptĬ() Ĭ = true Ĭonfiguration configuration = ConfigurationManager.OpenExeConfiguration(FileName) If (encrypt & (!))Ĭ("DataProtectionConfigurationProvider") Var configSection = configuration.GetSection("connectionStrings") as ConnectionStringsSection Private bool EncryptConnectionString(bool encrypt, string fileName)Ĭonfiguration = ConfigurationManager.OpenExeConfiguration(fileName) Throw new FileNotFoundException(string.Concat(FileName, ".config")) If (!File.Exists(string.Concat(FileName, ".config"))) Public ConnectionProtection(string FileName) / Determine if configuration file exists for application Add a reference for System.Configuration to the project following by adding this class.
Even though encrypting/decrypting connection string is not wise, here is a class for it.