Variable for number of days

[Member 14474607]

Hello - I am constructing an URL to pass for API call. It has a date value in it.

DateTime.Today.AddDays(0).ToString("yyyy-MM-dd")

Is there some way I can pass the (0) dynamically, reading from App.Config file? I tried --

DateTime.Today.AddDays(ConfigurationManager.AppSettings["CompletedDays"].ToString("yyyy-MM-dd")

which errored out and did not work. Any way to do this? Thanks!

[Lost User]

Member 14474607 wrote:

which errored out and did not work.

Sorry, there is no way we can guess what that means. Please edit your question and provide proper details of the problem.

[Lost User]

var revisedDateTime = DateTime.Now.AddDays( (int) ConfigurationManager.AppSettings["CompletedDays"] );

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it. ― Confucian Analects: Rules of Confucius about his food

[Richard Deeming]

The AppSettings indexer returns a string. The code will compile, but will throw an InvalidCastException at runtime.

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[Richard Deeming]

int completedDays;
int.TryParse(ConfigurationManager.AppSettings["CompletedDays"], out completedDays);
return DateTime.Today.AddDays(completedDays).ToString("yyyy-MM-dd");

Int32.TryParse Method (System) | Microsoft Docs[^] If the setting isn't a valid integer, completedDays will be set to 0. If you want to validate that the setting is valid, check the return value of TryParse.

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[Lost User]

50-50 chance. There are some value-object pair settings out there (UWP: ApplicationDataContainer)

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it. ― Confucian Analects: Rules of Confucius about his food

[Richard Deeming]

ConfigurationManager.AppSettings almost certainly refers to: ConfigurationManager.AppSettings Property (System.Configuration) | Microsoft Docs[^] That's a NameValueCollection[^], and the indexer[^] returns a string. If there's a different ConfigurationManager class out there with the same name but different semantics, then it was poorly named. :)

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"These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

[Lost User]

If you want to get picky, AppSettings is based on a NameObjectCollectionBase. Not my fault it's protected. But I won't whine about it.

It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it. ― Confucian Analects: Rules of Confucius about his food

[pkfox]

A much better way of doing things Richard - I often overlook TryParse and default to using one of the ConvertToxxx static methods

"I didn't mention the bats - he'd see them soon enough" - Hunter S Thompson - RIP