Add ability to delete named range

defined_names.go

@@ -12,6 +12,20 @@ func (f *File) AddDefinedName(sheet, begin, end, name string) {
 	endCol, endRow := getCellColRow(end)
 	r.DefinedNames.DefinedName = append(r.DefinedNames.DefinedName, xlsxDefinedName{
 		Name: name,
-		Data: fmt.Sprintf("%s!$%s$%s:$%s$%s", sheet, beginCol, beginRow, endCol, endRow),
+		Data: fmt.Sprintf("'%s'!$%s$%s:$%s$%s", sheet, beginCol, beginRow, endCol, endRow),
 	})
 }
+
+func (f *File) DeleteDefinedName(name string) {
+	r := f.workbookReader()
+	if r.DefinedNames == nil {
+		r.DefinedNames = &xlsxDefinedNames{}
+	}
+
+	for i := 0; i < len(r.DefinedNames.DefinedName); i++ {
+		if r.DefinedNames.DefinedName[i].Name == name {
+			r.DefinedNames.DefinedName = append(r.DefinedNames.DefinedName[:i], r.DefinedNames.DefinedName[i+1:]...)
+			return
+		}
+	}
+}

excelize.go

@@ -79,6 +79,10 @@ func (f *File) setDefaultTimeStyle(sheet, axis string, format int) {
 	}
 }
 
+func (f *File) GetWorkSheetReader(sheet string) *xlsxWorksheet {
+	return f.workSheetReader(sheet)
+}
+
 // workSheetReader provides function to get the pointer to the structure after
 // deserialization by given worksheet name.
 func (f *File) workSheetReader(sheet string) *xlsxWorksheet {