ShapefileSchema.FromFile Method
Returns a new instance of the ShapefileSchema class that contains the schema information used by the specified file.
FromFile(System.String fileName)
Returns a new instance of the ShapefileSchema class that contains the schema information used by the specified file.Syntax
public static ShapefileSchema FromFile (
System.String fileName
)Parameters
Path to a *.shp file that the schema is initialized from.
Return Value
A new schema that has been initialized from fileName.
Remarks
This method can be used by applications that want to save Shapefile data in the same format used by already existing Shapefile data. For example a small utility application that preprocesses data in some fashion and want to save the attributes using the same names and record lengths as the original data files.
The CodePage will be read from the .cpg file or, failing that, deduced from the Language Driver ID in the .dbf file. If there is no .cpg file and the Language Driver ID is zero (not set), the code page will become the default, representing UTF-8. If you need to, you can replace the code page you got via fromFile by something else, before you use the schema to save features. Please see the documentation for the ShapefileDataSet.CodePage property for a list of commonly used code pages.
The Attributes list in the returned schema will be empty if a corresponding .dbf file could not be found in the same directory as fileName.
The following table lists the default values that will be used when saving features that do not have a specified attribute or if it is of the wrong type:
Attribute type | Default value | Note |
|---|---|---|
System.Int64 | 0 | |
Atom | "" | An empty string. |
System.Boolean | False | |
System.Double | 0.0 | |
String (not available in C#) | "" | An empty string. |
Platforms
Windows, Linux, Android