topic Re: Reading shapefile with C# EasyGIS in Developers Questions

Reading shapefile with C# EasyGIS

MattiasWesterberg — Mon, 23 Nov 2020 09:56:23 GMT

I am trying to read a shapefile using EasyGIS with C#.

My code seems to work except for the last row were i call the GetRecord method.

The exception i get is:

System.ArgumentException: 'fieldIndex must be <= DBFRecordHeader.NumFields and >=0'

What am i doing wrong?

string path = System.IO.Directory.GetCurrentDirectory(); EGIS.ShapeFileLib.ShapeFile shapeFile = new EGIS.ShapeFileLib.ShapeFile(); shapeFile.LoadFromFile(path + "\\CD_VIC_06_imr.shp"); string[] record = shapeFile.GetRecords(shapeFile.RenderSettings.FieldIndex);

Thank you!

Re: Reading shapefile with C# EasyGIS

ManishPatel — Mon, 23 Nov 2020 10:05:08 GMT

Hi @MattiasWesterberg ,

I would debug and verify through the breakpoints if the shapefile was able to read and load through the path.

Also, while in debug mode you might check if the

shapeFile.RenderSettings.FieldIndex

returns the desired value.

Cheers,

Manish

Re: Reading shapefile with C# EasyGIS

MattiasWesterberg — Mon, 23 Nov 2020 13:54:14 GMT

shapeFile.RenderSettings.FieldIndex is -1.
What could be the reason for that?

Re: Reading shapefile with C# EasyGIS

MattiasWesterberg — Mon, 23 Nov 2020 13:54:57 GMT

shapeFile.RenderSettings.FieldIndex is -1.
What could be the reason for that?

Re: Reading shapefile with C# EasyGIS

ManishPatel — Mon, 23 Nov 2020 22:52:16 GMT

@MattiasWesterberg ,

If no FieldName is set or FieldName is not in the DBF file Field index returns -1.

When you debug does the shapeFile contain any values, if not then you might want to check the path for the shapefile. You can try to to hard code the path to the shapefile and try if it is able to read that.

Cheers,

Manish

Re: Reading shapefile with C# EasyGIS

MattiasWesterberg — Thu, 26 Nov 2020 12:42:51 GMT

How do i get the long and lat values?

Re: Reading shapefile with C# EasyGIS

MattiasWesterberg — Thu, 26 Nov 2020 12:44:26 GMT

Thanks.

Do you know how i can get the coordinates?