Method GetKeysByTag
GetKeysByTag(Tag)
Gets all keys of the objects with the specified tag.
Declaration
ICollection<string> GetKeysByTag(Tag tag)Parameters
| Type | Name | Description |
|---|---|---|
| Tag | tag | The tag to search the cache with. |
Returns
| Type | Description |
|---|---|
| System.Collections.Generic.ICollection<System.String> | Returns collection containing the cache keys. |
Examples
The following example demonstrates how to get the keys with the specified tag.
ICache cache = CacheManager.GetCache("demoCache");
Tag tag = new Tag("Sports");
ICollection<string> keys = cache.SearchService.GetKeysByTag(tag);GetKeysByTag(String)
Gets all the keys with the wild card supported tag.
Declaration
ICollection<string> GetKeysByTag(string wildCardExpression)Parameters
| Type | Name | Description |
|---|---|---|
| System.String | wildCardExpression | The wild card Expression to search with. |
Returns
| Type | Description |
|---|---|
| System.Collections.Generic.ICollection<System.String> | Returns collection containing the cache keys. |
Remarks
The special characters supported in wild search by NCache are:
1) "*" : Used as a substitute for zero or more characters in the string. 2) "?" : Used as a substitute for a single character in the string.
Examples
The following example demonstrates how to get the keys with the specified tag using wildcard.
ICache cache = CacheManager.GetCache("demoCache");Following tags are created and items are added in the cache with these tags
Tag[] tags = new Tag[3];
tags[0] = new Tag("Important Customers");
tags[1] = new Tag("East Coast Customers");
tags[2] = new Tag("West Coast Customers");
ICollection<string> keys = cache.SearchService.GetKeysByTag("*Customers");