Finds whether a global parameter with the given name exists in the input document.

Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 21.0.0.0 (21.1.1.109)
Since:  2016 Subscription Update

Syntax

C#
public static ElementId FindByName(
	Document document,
	string name
)
Visual Basic
Public Shared Function FindByName ( _
	document As Document, _
	name As String _
) As ElementId
Visual C++
public:
static ElementId^ FindByName(
	Document^ document, 
	String^ name
)

Parameters

document
Type: Autodesk.Revit.DB..::..Document
The document expected to contain the global parameter.
name
Type: System..::..String
Name of the global parameter

Return Value

ElementId of the parameter element, or InvalidElementId if it was not found.

Remarks

No exception is thrown when no parameter with such a name exists in the document; instead, the method returns an ElementId.InvalidElementId.

Examples

CopyC#
/// <summary>
/// Tries to find a global parameter by its name. 
/// </summary>
/// <param name="document">Revit project document.</param>
/// <param name="name">Name of a global parameter.</param>
/// <returns>An Element Id of the global parameter, or InvalidElementId if none found</returns>
public ElementId GetGlobalParameterByName(Document document, String name)
{
    // Global parameters are not available in all documents.
    // They are available in projects, but not in families.
    if (GlobalParametersManager.AreGlobalParametersAllowed(document))
    {
        return GlobalParametersManager.FindByName(document, name);
    }

    // return an empty set if global parameters are not available in the document
    return ElementId.InvalidElementId;
}
CopyVB.NET
' <summary>
' Tries to find a global parameter by its name. 
' </summary>
' <param name="document">Revit project document.</param>
' <param name="name">Name of a global parameter.</param>
' <returns>An Element Id of the global parameter, or InvalidElementId if none found</returns>
Public Function GetGlobalParameterByName(document As Document, name As [String]) As ElementId
    ' Global parameters are not available in all documents.
    ' They are available in projects, but not in families.
    If GlobalParametersManager.AreGlobalParametersAllowed(document) Then
        Return GlobalParametersManager.FindByName(document, name)
    End If

    ' return an empty set if global parameters are not available in the document
    Return ElementId.InvalidElementId
End Function

Exceptions

ExceptionCondition
Autodesk.Revit.Exceptions..::..ArgumentNullException A non-optional argument was NULL

See Also