How to modify Excel files in golang tealeg/xlsx

In recent years, due to its efficiency and cross-platform nature, Go language (or Golang) has become the favorite of developers. During the development process of Go language, some excellent third-party packages have also received a high degree of attention and use. Among them, tealeg/xlsx is a very popular Excel file reading and writing processing package, which is not only easy to use, but also has excellent performance. This article will introduce how to modify Excel files in tealeg/xlsx.

First, we need to create a new Excel file. In the Go language, it is very simple to use the tealeg/xlsx package to open or create an Excel file. You only need one sentence:

file := xlsx.NewFile()

This code can create a new empty Excel file in the Go language. Next, we need to create a worksheet using this file. Suppose we want to create a worksheet named "Sheet1", we can use the following code:

sheet, err := file.AddSheet("Sheet1")
if err != nil {
    log.Fatal(err)
}

In tealeg/xlsx, each worksheet represents a sheet object. In the above code, we create a new worksheet named "Sheet1" and assign it to the variable sheet. Next, we can add data to the worksheet.

For example, we can add a string "Hello World" in the first row and column:

row := sheet.AddRow()
cell := row.AddCell()
cell.Value = "Hello World"

In the above code, we first create a new row object row, in A new cell is added to the row object and assigned the value "Hello World". Now, we have successfully added a "Hello World" string to the worksheet named "Sheet1". Next, we will introduce how to modify an existing Excel file.

When we need to modify an existing Excel file, we need to use the OpenFile function in the tealeg/xlsx package to open the file. Suppose we need to modify a file named "test.xlsx", we can do this:

file, err := xlsx.OpenFile("test.xlsx")
if err != nil {
    log.Fatal(err)
}

Now, we have successfully opened the Excel file named "test.xlsx". If the file does not exist, the OpenFile function will return an error. Next, we can use the file.Sheets variable to access all worksheets in the file. Suppose we need to modify the data in the worksheet named "Sheet1", we can do this:

sheet := file.Sheet["Sheet1"]
row := sheet.Rows[0]
cell := row.Cells[0]
cell.Value = "New Value"

In the above code, we first obtain the worksheet object sheet named "Sheet1", and then obtain The first row object row and the first cell object cell of the worksheet. Finally, we modified the cell's value to "New Value". In this way, we can simply modify the data in the Excel file.

In general, tealeg/xlsx is an Excel file reading and writing processing package that is very suitable for Go language developers. Through the introduction of this article, readers can better understand how to use this library in code to read, create and modify Excel files. Hope this article is helpful to you.

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