IMap::Remove method

發行項
02/13/2018

Removes an item form the IMap.

Syntax

HRESULT Remove(
  [in] K key
);

Parameters

key [in]
Type: K

The key associated with the item to remove.

Return value

Type: HRESULT

If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.

Error codes

The Remove method returns error codes that include, but are not limited to, those in the following table.

Name	Meaning
E_BOUNDS	The key does not exist.

Remarks

Use the HasKey method to determine if the key exists in the map.

Examples

The following code example demonstrates how to use the Remove method.

comptr<IMap<HSTRING,int>> pMap;
HSTRING hKey;
//...

bool bReplaced;
HRESULT hr = pMap->Insert(hKey, 123, &bReplaced);
//...

bool bHasKey;
hr = pMap->HasKey(hKey, &bHasKey);
if (SUCCEEDED(hr) && bHasKey)
{
    hr = pMap->Remove(hKey);
    if (SUCCEEDED(hr))
    {
        //...
    }
}

Requirements

Minimum supported client	Windows 8
Minimum supported server	Windows Server 2012
Header	Windows.Foundation.Collections.h

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