[C# Grasshopper Rhino6] Where should i put .csv file which is loaded from GHComponent?

Grasshopper
1

Hi,

I’m trying to make component which can handle C# forms.

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image1154×866 36 KB

My form will read .csv file when it is showed up.

It works well in Rhino5(both debugging mode and normal launching)
But in Rhino6, my form won’t be showed up.

I found that this error is caused by file location problem.

I usually save .csv file in “C:\Users\UserName\AppData\Roaming\Grasshopper\Libraries”.
In case of Rhino6, Where shoud I put .csv file ?

Best,
Shimpei

1 Like
2

I’m not sure, but sometimes turning off COFF settings could solve such problems. you can do this by running GrasshopperDeveloperSettings command in rhino:
COFF

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3

Hi Mahdiyar,

Thank you for replying me!

I tried this but my problem didn’t change.

However, I found the solution to solve it.

string path = System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
StreamReader sectReader = new StreamReader(path+@"\Grasshopper\Libraries\section.csv");

Best
Shimpei

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4

If possible, post the relevant CSV reader code.

I’d recommend to resolve the relative path yourself to ensure your plugin works whatever loading mechanism is.

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5

Hi gankeyu,

Thank you for replying me!
Pancake is good plugin so I think you are an expert of that field(handling data export and import).

Here is my code.

        Utilities.sectionform _sectionform;

        public void DisplayForm1()
        {
            _sectionform = new Utilities.sectionform();
            string path = System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
            StreamReader sectReader = new StreamReader(path+@"\Grasshopper\Libraries\section.csv"); 
            _sectionform.FormClosed += OnFormClosed;
            GH_WindowsFormUtil.CenterFormOnCursor(_sectionform, true);
            _sectionform.Show(Grasshopper.Instances.DocumentEditor);
        }

        private void OnFormClosed(object sender, FormClosedEventArgs formClosedEventArgs)
        {
            _sectionform = null;
        }

        protected override void AppendAdditionalComponentMenuItems(ToolStripDropDown menu)
        {
            Menu_AppendItem(menu, "Show Section Editor", ShowUiClicked1, null, true, false);
        }

        private void ShowUiClicked1(object sender, EventArgs e)
        {
            DisplayForm1();
        }

Best,
shimpei

1 Like
6

Just some information

I suppose you were not using System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData) before you found a solution.

Without an absolute path, for example: var sectReader = new StreamReader("section.csv");
Dotnet framework will look up the file in the current working directory, which isn’t guaranteed to be Libraries folder.

If the file is not there, a FileNotFoundException will be raised. Since the constructor isn’t enclosed in a try...catch clause, the entire method will abort and _sectionform.Show never gets executed.

From a programming paradigm perspective, I’d recommend you use try...catch to show a message instead of silent fail, e.g.:

    public void DisplayForm1()
    {
        string path = System.Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
        StreamReader sectReader = null;
        try
        {
            sectReader = new StreamReader(path+@"\Grasshopper\Libraries\section.csv"); 
        } catch (FileNotFoundException e) {
            MessageBox.Show("CSV file not found");
            return;
        }
        _sectionform = new Utilities.sectionform();
        _sectionform.FormClosed += OnFormClosed;
        GH_WindowsFormUtil.CenterFormOnCursor(_sectionform, true);
        _sectionform.Show(Grasshopper.Instances.DocumentEditor);
    }

PS: Remember to Dispose the StreamReader or use using(...) clause to prevent potential resource leak. example

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A post was split to a new topic: C# csv to List script