topic Re: Revit API newbie in Revit API Forum

Revit API newbie

Anonymous — Mon, 16 Jan 2012 04:37:24 GMT

Hi,

i'm new in this Revit API..dont even have any background in programming...just basic programming. Need help to understand more about revit API. Now i'm trying out Revit API from Revit 2012 API Developer's Guide book. Got an error and not sure how to fix it:

Here are the codes:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.Revit.UI;
using Autodesk.Revit.DB;
using Autodesk.Revit.Attributes;
using Autodesk.Revit.UI.Selection;

namespace Filtered_Element
{
[Transaction(TransactionMode.ReadOnly)]
public class Class1 : IExternalCommand
{
public Result Execute(ExternalCommandData commandData,
ref string message, ElementSet elements)
{
//Create a Filter to get all the doors in the document
ElementClassFilter familyInstanceFilter = new ElementClassFilter(typeof(FamilyInstance));
ElementCategoryFilter doorsCategoryFilter = new ElementCategoryFilter(BuiltInCategory.OST_Doors);
LogicalAndFilter doorInstanceFilter = new LogicalAndFilter(familyInstanceFilter, doorsCategoryFilter);
FilteredElementCollector collector = new FilteredElementCollector(document);
ICollection<ElementId> doors = collector.WherePasses(doorInstanceFilter).ToElementIds();

string prompt = "The ids of the doors in the current document are:";
foreach(ElementId id in doors)

{
prompt += "\n\t" + id.IntegerValue;
}

//Give the user some information
TaskDialog.Show("Revit", prompt);

return Result.Succeeded;
}
}
}

the error:

The name 'document' does not exist in the current context

Thx in advanced.

-Nik-

Re: Revit API newbie

ollikat — Mon, 16 Jan 2012 06:22:16 GMT

Basically the reason is that there aren't any object called "document" in your function. So how to get one...?

Many (most...) of the API methods want to know the project document, which should be used. The reference for this document is provided in the ExternalCommandData argument of the Execute() method. You can assign it to a temporary variable or use it directly intead...pick your choise.

FilteredElementCollector collector = new FilteredElementCollector(extCommData.Application.ActiveUIDocument.Document);

// OR...

Document doc = extCommData.Application.ActiveUIDocument.Document;
FilteredElementCollector collector = new FilteredElementCollector(doc);

Re: Revit API newbie

Anonymous — Mon, 16 Jan 2012 06:46:47 GMT

Thx for the reply...appreciate it..

i did try both of your solution..now another error occur..the error same as before but with different name "The name 'extCommData' does not exist in the current context".

Here are my coding:

namespace Filtered_Element
{
[Transaction(TransactionMode.ReadOnly)]
public class Class1 : IExternalCommand
{
public Result Execute(ExternalCommandData commandData,
ref string message, ElementSet elements)
{
//Create a Filter to get all the doors in the document
ElementClassFilter familyInstanceFilter = new ElementClassFilter(typeof(FamilyInstance));
ElementCategoryFilter doorsCategoryFilter = new ElementCategoryFilter(BuiltInCategory.OST_Doors);
LogicalAndFilter doorInstanceFilter = new LogicalAndFilter(familyInstanceFilter, doorsCategoryFilter);
Document doc = extCommData.Application.ActiveUIDocument.Document;
FilteredElementCollector collector = new FilteredElementCollector(doc);
ICollection<ElementId> doors = collector.WherePasses(doorInstanceFilter).ToElementIds();

string prompt = "The ids of the doors in the current document are:";
foreach(ElementId id in doors)

{
prompt += "\n\t" + id.IntegerValue;
}

//Give the user some information
TaskDialog.Show("Revit", prompt);

return Result.Succeeded;
}
}
}

i'm not really good in programming..i might missing something...

thx in advanced..

-Nik-

Re: Revit API newbie

ollikat — Mon, 16 Jan 2012 06:54:48 GMT

Again...there aren't such a variable declared in the scope of the function. Sorry...I just wrote an example, I didn't check out what was the actual name of that argument in yor code. Your function is declared like this:

public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)

So instead you should use "commandData"

Re: Revit API newbie

Anonymous — Mon, 16 Jan 2012 06:59:57 GMT

Got it...what a silly question from me..

Thank you so much...

Re: Revit API newbie

Anonymous — Mon, 16 Jan 2012 10:09:13 GMT

Hi again,

i hv 1 more question..<for now>..

how to get area value to be read in task dialog box..

my codes are as below:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Autodesk.Revit.Attributes;
using Autodesk.Revit.DB;
using Autodesk.Revit.UI;
using Autodesk.Revit.ApplicationServices;

namespace Revit_DialogBox
{
[Transaction(TransactionMode.Automatic)]
public class Class1 : IExternalCommand
{
public Result Execute(ExternalCommandData commandData,
ref string message, ElementSet elements)
{
//Get the application and document from external data.
Application app = commandData.Application.Application;
Document activedoc = commandData.Application.ActiveUIDocument.Document;

//Create a Revit task dialog to communicate information to the user.
TaskDialog mainDialog = new TaskDialog("Hello, Revit");
mainDialog.MainInstruction = "Hello, Revit";
mainDialog.MainContent = "This sample shows how to use a Revit task dialog to communicate with the user."
+ "The command links below open additional task dialogs with more information.";

//Add commandLink option to task dialog
mainDialog.AddCommandLink(TaskDialogCommandLinkId.CommandLink1,
"View information about the Revit Installation");
mainDialog.AddCommandLink(TaskDialogCommandLinkId.CommandLink2,
"View information about the active document");

//Set common buttons and default button. if no CommandButton or CommandLink is added,
//task dialog will show a Close button by default.
mainDialog.CommonButtons = TaskDialogCommonButtons.Close;
mainDialog.DefaultButton = TaskDialogResult.Close;

//Set footer text. Footer text is usually used to link to the help document.
mainDialog.FooterText = "<a href=\"http://usa.autodesk.com/\">"
+ "Click here for the Revit API Developer Center</a>";

TaskDialogResult tResult = mainDialog.Show();

//if the user clicks the first command link, a simple Task Dialog
//with only a close button shows information about the Revit installation.
if (TaskDialogResult.CommandLink1 == tResult)
{
TaskDialog dialog_CommandLink1 = new TaskDialog("Revit Build Information");
dialog_CommandLink1.MainInstruction = "Revit Version is: " + app.VersionName + "\n"
+ "Revit Version Number is: " + app.VersionNumber + "\n"
+ "Revit Version Build is: " + app.VersionBuild;

dialog_CommandLink1.Show();
}

//if the user clicks the second command link, a simple Task Dialog
//created by static method shows information about the active document
else if (TaskDialogResult.CommandLink2 == tResult)
{
TaskDialog.Show("Active Document Information",
"Active document: " + activedoc.Title + "\n"
+ "Active view name: " + activedoc.ActiveView.Name + "\n"
+ "Floor Area: " + ParameterType.Area);
}
return Result.Succeeded;
}
}
}

the highlighted should read the area value..right? or not? the result that i get shown below:

help

thx in advanced..

-Nik-

Re: Revit API newbie

ollikat — Mon, 16 Jan 2012 10:22:33 GMT

Try like this

ParameterType.Area.ToString("F");

See explanations from http://msdn.microsoft.com/en-us/library/c3s1ez6e.aspx#Y311

Re: Revit API newbie

Anonymous — Thu, 19 Jan 2012 03:59:16 GMT

nope..still not working...not sure how to solve this..i did try so many way to get the area value..

here are my code:

//Set common buttons and default button. if no CommandButton or CommandLink is added,
//task dialog will show a Close button by default.
mainDialog.CommonButtons = TaskDialogCommonButtons.Close;
mainDialog.DefaultButton = TaskDialogResult.Close;

//Set footer text. Footer text is usually used to link to the help document.
mainDialog.FooterText = "<a href=\"http://usa.autodesk.com/\">"
+ "Click here for the Revit API Developer Center</a>";

TaskDialogResult tResult = mainDialog.Show();

dialog_CommandLink1.Show();
}

//if the user clicks the second command link, a simple Task Dialog
//created by static method shows information about the active document
else if (TaskDialogResult.CommandLink2 == tResult)
{
BuiltInParameter area = BuiltInParameter.MASS_GROSS_AREA;
BuiltInParameter area3 = BuiltInParameter.ZONE_AREA;
BuiltInParameter area4 = BuiltInParameter.LEVEL_DATA_FLOOR_PERIMETER;
BuiltInParameterGroup area5 = BuiltInParameterGroup.PG_AREA;
BuiltInParameter area6 = BuiltInParameter.LEVEL_DATA_FLOOR_AREA;
AreaElemType area1 = AreaElemType.BOMAArea;
ParameterType area2 = ParameterType.Area;
BuiltInParameter area7 = BuiltInParameter.ROOM_AREA;

int iarea = (int)area;
int iarea3 = (int)area3;
int iarea5 = (int)area5;
int iarea6 = (int)area6;
int iarea7 = (int)area7;
Int64 iarea2 = (Int64)area2;
Int64 iarea1 = (Int64)area1;

TaskDialog.Show("Active Document Information",
"Active document: " + activedoc.Title + "\n"
+ "Active view name: " + activedoc.ActiveView.Name + "\n"
+ "Floor Area: " + activedoc.ActiveView.Level + "\n"
+ "Floor Area: " + activedoc.FloorTypes.Size + "\n"
+ "Floor Area: " + iarea1 + "\n"
+ "Floor Area: " + iarea2 + "\n"
+ "Floor Area: " + iarea3 + "\n"
+ "Floor Area: " + area4 + "\n"
+ "Floor Area: " + iarea5 + "\n"
+ "Floor Area: " + iarea6 + "\n"
+ "Floor Area: " + iarea7 + "\n"
+ "Floor Area: " + iarea);
}
return Result.Succeeded;
}

}
}

this is what i get:

not sure what the numbers mean...

thx in advanced

-nik-

Re: Revit API newbie

ollikat — Thu, 19 Jan 2012 06:04:45 GMT

Maybe we should first make sure what are you trying to do. Are you trying to get a area (square meters etc) of some floor. Or is it something else that you want?

Re: Revit API newbie

Anonymous — Thu, 19 Jan 2012 06:28:37 GMT

what im trying to do is that i try to make my taskdialog box to read the area of the floor of my model (hv 3 level). then i want to transfer this value to either excel/pdf/word..i know in revit there is a tool called Export to export the properties of the model in to csv files..but i want to make it as a new tool that only read the specific value such as area to be export to my report that i've created in excel/pdf/word...is it posibble to do that?

Re: Revit API newbie

ollikat — Thu, 19 Jan 2012 07:23:40 GMT

I don't know about excel and stuff. But the way you try to get the floor area is not correct. When you have got the floor element etc. which has this area parameter, then you can use it's Parameter property (inherited from Element) and read the value from the parametr you got (AsDouble(), AsString() etc...). What you are now doing is you are printing the values of enumerations.

Re: Revit API newbie

Anonymous — Wed, 22 Feb 2012 03:36:25 GMT

Hi..

It has been a while...now i'm able to transfer some of the info from the actived revit file into the pdf format...but still i could not get the area value of the model from actived revit file into pdf format..maybe because i dont really understand the parameter used in the revit...

can anyone show me which parameter should i use to call out area value?i've tried BuiltInParameter..but it doesn't seem right...hurmmm~~help...

Thx...

-Nik-