从web.config获取多个连接字符串

Question

How to get all the connection strings's names from the web.config via code in C#?

I tried this:

System.Configuration.Configuration webConfig = System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration("~");
ConnectionStringsSection x = webConfig.ConnectionStrings;
string here = x.SectionInformation.Name;

Answer 1

    foreach (ConnectionStringSettings c in System.Configuration.ConfigurationManager.ConnectionStrings)
    {
        //use c.Name
    }

Answer 2

This is how to use LINQ to get list of connection string names:

List<string> names = ConfigurationManager.ConnectionStrings
    .Cast<ConnectionStringSettings>()
    .Select(v => v.Name)
    .ToList();

Or you can build a dictionary of it:

Dictionary<string/*name*/, string/*connectionString*/> keyValue = ConfigurationManager.ConnectionStrings
    .Cast<ConnectionStringSettings>()
    .ToDictionary(v => v.Name, v => v.ConnectionString);

Answer 3

Not specific to Connection Strings, but might be helpful none the less.

System.Web.HttpContext ctx = System.Web.HttpContext.Current;

Configuration config;

if (ctx != null)
    config = WebConfigurationManager.OpenWebConfiguration(ctx.Request.ApplicationPath);