## UserDataMap.IsEmpty

### Introduced

v3.0

### Description

Returns a Boolean value indicating whether or not there is user data on the UserDataItem at the specified index (true=empty/no data; false=not empty). The index must be in the range of 0 to UserDataMap.Count - 1.
A common scenario for using this property is inside a loop which visits each component in the user data map to see if any user data has been set.

### C# Syntax

    // get accessor
    Boolean UserDataMap.get_IsEmpty( Int32 in_ulIndex );

### Parameters

Parameter | Type | Description
--- | --- | ---
Index | Long | Index of the component within the cluster.

### See Also

UserDataItem Cluster.Elements ClusterProperty