topic Re: Select a Text from AutoCAD and to Display in C# windows forms in .NET Forum

Select a Text from AutoCAD and to Display in C# windows forms

Anonymous — Fri, 02 Mar 2012 09:21:00 GMT

Dear All,

Season greetings to all experts,

with respect to above subject,

using System.Runtime.InteropServices;

using Autodesk.AutoCAD.Interop;

privatevoid button2_Click(object sender, EventArgse)

{

AcadApplication AcadApp = new Autodesk.AutoCAD.Interop.AcadApplication();

AcadDocument doc1 = AcadApp.Documents.Open("c:\\test.dwg");

AcadApp.Visible =true;

AcadApp.ZoomExtents();

double[] startPoint = newdouble[3];

double[] endPoint = newdouble[3];

startPoint[0] = 0; startPoint[1] = 0; startPoint[2] = 0;

endPoint[0] = 20; endPoint[1] = 20; endPoint[2] = 0;

AcadSelectionSet ssetObj = AcadApp.ActiveDocument.SelectionSets.Add("ss1");

ssetObj.Select(Autodesk.AutoCAD.Interop.Common.

AcSelect.acSelectionSetCrossingPolygon,startPoint,endPoint,Type.Missing, Type.Missing);

}

the idea is to select the AutoCAD text by crossingPolygon and then to display the selected text in the C# windows form label1.text.

Could you please help for this above request.

Thanks in Advance.

regards,

Micky.

Re: Select a Text from AutoCAD and to Display in C# windows forms

Balaji_Ram — Fri, 02 Mar 2012 11:13:45 GMT

Hi Micky,

Greetings to you too 🙂

Will a pure .Net API route suit your needs ? You will not need the COM API for this :

Here is a sample code :

            Document doc = Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;

            PromptSelectionOptions pso = new PromptSelectionOptions();
            pso.MessageForAdding = "\nSelect the entities";
            pso.SingleOnly = false;

            PromptSelectionResult psr = ed.GetSelection(pso);

            if (psr.Status != PromptStatus.OK) return;
            SelectionSet ss = psr.Value;

            foreach (SelectedObject selectedObj in ss)
            {
                switch (selectedObj.SelectionMethod)
                {
                    case SelectionMethod.Crossing:
                    {
                        CrossingOrWindowSelectedObject crossingWindSelectedObj = selectedObj as CrossingOrWindowSelectedObject;
                        break;
                    }
                }
            }

The SelectionMethod enum has other values for Window selection and so on. You can check it out yourself.

Re: Select a Text from AutoCAD and to Display in C# windows forms

norman.yuan — Fri, 02 Mar 2012 14:55:39 GMT

The OP is obviously doing a stand-alone EXE app that automate AutoCAD (or the OP would not have to have code "new AcadApplication();" , thus cannot use .NET API.

To OP:

In your Select() method, you only pass in 2 points, which cannot form a polygon, thus, the first argument of the Select() method should be acSelectionSetFence.

Since your selecting target is text, it would be better to supply a selection filter (the last 2 arguments of the Select() method).

Anyway, assume the Select() method does return a set of AcadEnity, you simply loop through the SelectionSet to retrieve test string, like this:

StringBuillder txt=new StringBuilder();

foreach (object ent in ssetObj)

{

AcadText t=ent as AcadText

if (T!=null)

{

txt.Append(t.TextString + "\n");

}

//Show the text clollected in message box, or in your form.

MessageBox.Show(t.ToString());

Of course, if your selection target alos include MText, then you need to deal with it accordingly.

Re: Select a Text from AutoCAD and to Display in C# windows forms

Anonymous — Fri, 02 Mar 2012 15:06:18 GMT

Dear Mr.Balaji,

Season Greetings,

Thanks for your quick response,

I am a beginer for .Net C#, that's why I am struggling a bit.

In my codings I have some error in crossingpolygon selection method, rest everything working well.

I am in need of 2 things,

1. select a Text from AutoCAD by crossingpolygon method,

2. store it in a string varible to display in C# windows forms.

Could you please help me for this above request,

I am trying hard to learn this .Net, I have a big hope that as soon as possible i will be getting a clear understanding of .net.

Thanks & regards,

Micky.

Re: Select a Text from AutoCAD and to Display in C# windows forms

Hallex — Fri, 02 Mar 2012 15:16:44 GMT

If you're using Interop better yet to define variables explicitly

before you will be pulling them to the method / function

From other hand you confused the selection mode

try this code snip instead and tell us about result after 🙂

{code}

object miss = Type.Missing;
AcadSelectionSet ssetObj = AcadApp.ActiveDocument.SelectionSets.Add("ss1");
Autodesk.AutoCAD.Interop.Common.AcSelect mode = AcSelect.acSelectionSetCrossing;
ssetObj.Select(mode, startPoint, endPoint, miss, miss);
MessageBox.Show(ssetObj.Count.ToString());{code}

~'J'~

Re: Select a Text from AutoCAD and to Display in C# windows forms

Anonymous — Fri, 02 Mar 2012 15:17:21 GMT

Dear Mr. Norman,

Season Greetings,

thanks for your response,

for crossingpolygon selection method I using bottom left corner and top right corner only,

Could you please see my reply post to Mr. Balaji, that's my problem and I got struck.

Thanks & regards,

Micky.

Re: Select a Text from AutoCAD and to Display in C# windows forms

norman.yuan — Fri, 02 Mar 2012 15:42:09 GMT

OK, simply call

ssetobj.Select(acSelectionSetWindow, startPoint, endPoint,....)

Re: Select a Text from AutoCAD and to Display in C# windows forms

chiefbraincloud — Fri, 02 Mar 2012 18:24:48 GMT

or rather acSelectionSetCrossing, but not acSelectionSetCrossingPolygon.

Re: Select a Text from AutoCAD and to Display in C# windows forms

Anonymous — Sat, 03 Mar 2012 03:08:45 GMT

Dear Mr. Hallex,

Thanks very much for your kindness & support, the code is working well.

where I will get reference or help file for the all the methods?

for examples :

ssetObj.Select(mode, startPoint, endPoint, miss, miss);

[object filter Type = Type.missing] --- where to find examples or help files?

[object filter Data = Type.missing]--- where to find examples or help files?

for examples :

AcadDocument doc1 = acApp.Documents.Open(textBox1.Text);

In open method,

I have given only the file name, if I wnat to give other two inputs then how?

so where I will get reference or help files for all the methods.

best regards,

Micky.