Changing the Web.config file key value at runtime using C# without changing the structure of the file

Question

I have the following code to change key value in Web.config file.

Configuration webConfigApp = WebConfigurationManager.OpenWebConfiguration("~");
webConfigApp.AppSettings.Settings["Email"].Value = "abc@def.com";
webConfigApp.Save();

It changes the value successfully but it also affects the file structure. I have some comments in the file that comments are gone after running the above code.

Is there any code which only updates the key value and not affects the entire file?

check this link also https://stackoverflow.com/questions/2260317/change-a-web-config-programmatically-with-c-sharp-net — Jayakumar Thangavel, Oct 15 '19 at 12:56

score 0 · Answer 1 · answered Oct 15 '19 at 12:50

0

There is an overload on Save method that is

Save(ConfigurationSaveMode)

If you set it to Minimal it will save only the changed properties. Please take a look at https://learn.microsoft.com/en-us/dotnet/api/system.configuration.configurationsavemode?view=netframework-4.8

answered Oct 15 '19 at 12:50

CyberZeus

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No, it is still removing comments from a file. – V.Mulik Oct 16 '19 at 11:43
Are you forced to adding comments into web.config? Can't you put them in another file? – CyberZeus Oct 17 '19 at 12:02
I have comments in the Web.config file like: – V.Mulik Oct 17 '19 at 12:37

Changing the Web.config file key value at runtime using C# without changing the structure of the file

1 Answers1