Tests whether global parameters are allowed in the given document. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 17.0.0.0 (17.0.1090.0) 
  Since:  2016 Subscription Update 
Syntax
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| Visual Basic | 
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| Visual C++ | 
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Parameters
- document
-  Type:  Autodesk.Revit.DB Document  
 A revit document of interest.
Remarks
 First of all, global parameters can be had in main project documents only; they are not supported in family documents. However, there may also be other circumstances due to which global parameters may be disallowed in a particular project, either temporarily or permanently. 
 Examples
 Copy  C#
 Copy  C# /// <summary>
/// Tests whether there are any global parameters present in the given document 
/// </summary>
/// <param name="document">Revit project document.</param>
/// <returns>A set of ElementIds of global parameter elements</returns>
public bool ContainsGlobalParameters(Document document)
{
    // Global parameters are not available in all documents.
    // They are available in projects, but not in families.
    if (GlobalParametersManager.AreGlobalParametersAllowed(document))
    {
        return (GlobalParametersManager.GetAllGlobalParameters(document).Count > 0);
    }
    return false;
} Copy  VB.NET
 Copy  VB.NET ' <summary>
' Tests whether there are any global parameters present in the given document 
' </summary>
' <param name="document">Revit project document.</param>
' <returns>A set of ElementIds of global parameter elements</returns>
Public Function ContainsGlobalParameters(document As Document) As Boolean
    ' Global parameters are not available in all documents.
    ' They are available in projects, but not in families.
    If GlobalParametersManager.AreGlobalParametersAllowed(document) Then
        Return (GlobalParametersManager.GetAllGlobalParameters(document).Count > 0)
    End If
    Return False
End FunctionExceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |