Unlocking the Power of Spreadsheets with Go
In today’s data-driven world, analyzing and presenting data in a clear and concise manner is crucial for businesses and developers alike. One of the most effective ways to achieve this is by using spreadsheets. In this article, we’ll explore how to create and manipulate spreadsheets in Go using the Excelize library.
Generating an Expense Report
To demonstrate the capabilities of Excelize, we’ll create a simple expense report. This report will include static information such as company details and dynamic data representing expenses.
Creating a Worksheet
To get started, we need to create a new worksheet. We can do this by initializing a new Excelize file and adding a new sheet.
go
func main() {
f := excelize.NewFile()
index := f.NewSheet("Expense Report")
f.SetActiveSheet(index)
}
Adding Data and Styles
With our worksheet created, we can start adding data and styles. We’ll use various Excelize functions to set row heights, merge cells, and create custom styles.
go
func main() {
// ...
f.SetRowHeight("A1", 40)
f.MergeCell("A1", "E1")
style, err := f.NewStyle(&excelize.Style{
Alignment: &excelize.Alignment{
Horizontal: "center",
},
})
if err != nil {
log.Fatal(err)
}
f.SetCellStyle("A1", "E1", style)
}
Saving the Worksheet
Once we’ve added all the necessary data and styles, we can save the worksheet to a file.
go
func main() {
// ...
if err := f.SaveAs("expense_report.xlsx"); err != nil {
log.Fatal(err)
}
}
Exporting to CSV
In addition to working with XLSX files, Excelize also supports exporting data to CSV format. We can use the GetCellValue function to extract data from our worksheet and write it to a CSV file.
go
func generateCSV(f *excelize.File, start, end string) error {
csvfile, err := os.Create("expenses.csv")
if err != nil {
return err
}
defer csvfile.Close()
writer := csv.NewWriter(csvfile)
for row := start; row <= end; row++ {
values := []string{}
for col := 'A'; col <= 'E'; col++ {
value, err := f.GetCellValue("Expense Report", string(col)+row)
if err != nil {
return err
}
values = append(values, value)
}
if err := writer.Write(values); err != nil {
return err
}
}
return writer.Flush()
}
By leveraging the power of Go and the Excelize library, we can easily create and manipulate spreadsheets to analyze and present data in a clear and concise manner. Whether you’re working with XLSX files or exporting data to CSV format, Excelize provides a robust set of tools to help you achieve your goals.