Analysis of the showModalDialog data cache problem (solved by disabling browser cache)

To display the latest data, you must set it on the page to cancel the cache.

Add the following code to the Head label of the showModalDialog page:
<Meta http-equiv = "pragma" content = "no-cache">
In this way, the page will not be cached. This ensures that the latest data is displayed after the page is opened again after the data is modified.

HTML
<Meta http-equiv = "pragram" content = "no-cache">
Disable the browser from accessing the page from the local cache.
The webpage is not saved in the cache, and the page is refreshed every time the webpage is accessed.
<Meta http-equiv = "cache-control" content = "no-cache, must-revalidate">
Similar to above, page must be reloaded
<Meta http-equiv = "expires" content = "0">
The expiration time of a webpage in the cache is 0. Once the webpage expires, you must subscribe to it from the server.

. NET
Response. Expires =-1;