如何在 Razor 中导出 CSV 和 Excel

1. IronXL

IronXL is a .NET library used for working with Excel files. It is built on top of OpenXML SDK and provides a simple API for reading, writing, and manipulating Excel spreadsheets. IronXL can be used in a variety of .NET applications, including Web Applications, Desktop Applications, and Console Applications. IronXL provides a range of features for working with Excel documents, including the ability to read and write data to individual cells, create charts and graphs, and perform complex calculations. It also supports advanced Excel features such as pivot tables, conditional formatting, and data validation.

Exporting data to Excel and CSV files is a common task in web development, and Razor and IronXL make it easy to accomplish. With IronXL, developers can easily create Excel spreadsheets and save them to a file or stream. Razor can then be used to generate dynamic content that includes links to the Excel document, allowing users to download them directly from the web page. The CSV file format can also be generated using IronXL and downloaded similarly using Razor. This makes it simple to create reports and other data-driven content that can be easily shared with others. Overall, the combination of Razor and IronXL .NET Core Razor Pages provides a powerful toolset for web developers looking to create dynamic, data-driven web pages.

2. Prerequisites

Before using Razor in Visual Studio, there are a few prerequisites that users should have in place. Here are some of the important ones:

1. As an IronXL user, you need to have Visual Studio installed on your computer system. You can download Visual Studio Community for free from the official website of Microsoft.
2. You also need to have the .NET Core SDK installed on your computer. You can download the latest version of the .NET Core SDK from the official Microsoft website.
3. Your Web Development environment must be set before starting to work with Razor View.

3. Creating a New Visual Studio Project

To create a new Visual Studio project, follow these steps:

1. Open Visual Studio.

2. Click on "Create a New Project" in the start window, or click on "File" > "New" > "Project" in the menu bar.

   Visual Studio's start window

3. Select the type of project you want to create, to use Razor Pages, select ASP.NET Core Web App and click on Next.

   Create a new .NET Core Web App in Visual Studio

4. A new window will appear, write your new project name and location. Then click on Next.

   Configure the new project

5. Now in the new window select your target Framework, check the configure for HTTPS option and click on create.
6. Just like that your new Visual Studio ASP.NET Core Web App Project is created.

4. Install IronXL

The IronXL Library can be downloaded and installed in different ways.

These are:

• Using Visual Studio NuGet packages.
• Using the Visual Studio Command Line.

Install-Package IronXL.Excel

5. Export Data to an Excel File in Razor Net Core

Once the project is created, a simple interface of the Razor application is created. Now change the interface to export to Excel export.

The Web interface of the newly created project

Change the above interface by editing the index.cshtml file in the Pages directory.

@page
@model IndexModel
@{
    ViewData["Title"] = "Home page";
}
<div class="text-center">
    <h1 class="display-4">IronXL Generate Excel File</h1>
    <p class="m-5">This will be the combination of Razor and IronXL, together they will Export data to Excel file.</p>
    <form method="post" asp-page-handler="Export">
        <button class="btn btn-success p-3">Export Excel File!</button>
    </form>
</div>

@page
@model IndexModel
@{
    ViewData["Title"] = "Home page";
}
<div class="text-center">
    <h1 class="display-4">IronXL Generate Excel File</h1>
    <p class="m-5">This will be the combination of Razor and IronXL, together they will Export data to Excel file.</p>
    <form method="post" asp-page-handler="Export">
        <button class="btn btn-success p-3">Export Excel File!</button>
    </form>
</div>

page model ReadOnly Property () As IndexModel
	ViewData("Title") = "Home page"
End Property
'INSTANT VB TODO TASK: The following line uses invalid syntax:
'<div class="text-center"> <h1 class="display-4"> IronXL Generate Excel File</h1> <p class="m-5"> This will be the combination @of Razor @and IronXL, together they will Export data @to Excel file.</p> <form method="post" asp-page-handler="Export"> <button class="btn btn-success p-3"> Export Excel File!</button> </form> </div>

This code will change the interface of the home page and add the export button.

The new interface with an export button

Now create the OnPostExport method in the index.cshtml.cs file and write the following code. This code generates a worksheet, writes column names in bold, and allows setting other styling options like font size and background color. You can think of it as a simple example of exporting data from a database to an Excel file.

public FileResult OnPostExport()
{
    // Create a new workbook with the Excel file format
    WorkBook workBook = new WorkBook(IronXL.ExcelFileFormat.XLSX);

    // Create a new worksheet in the workbook
    WorkSheet workSheet = workBook.CreateWorkSheet("data");

    // Add data and styles to the new worksheet
    workSheet["A1"].Value = "Name";
    workSheet["B1"].Value = "Email";
    workSheet["C1"].Value = "Marks";
    workSheet["D1"].Value = "Percentage";

    // Set styling for column headers
    workSheet["A1:D1"].Style.Font.Bold = true;

    // Filling the worksheet with data
    workSheet["A2"].Value = "Nick";
    workSheet["A3"].Value = "Roy";
    workSheet["A4"].Value = "Chris";
    workSheet["B2"].Value = "Nick@gmail.com";
    workSheet["B3"].Value = "Roy123@gmail.com";
    workSheet["B4"].Value = "Chris1999@gmail.com";
    workSheet["C2"].Value = "850";
    workSheet["C3"].Value = "710";
    workSheet["C4"].Value = "990";
    workSheet["D2"].Value = "85%";
    workSheet["D3"].Value = "71%";
    workSheet["D4"].Value = "99%";

    // Return the file as an Excel sheet
    return File(workBook.ToStream().ToArray(), "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Exported.xlsx");
}

public FileResult OnPostExport()
{
    // Create a new workbook with the Excel file format
    WorkBook workBook = new WorkBook(IronXL.ExcelFileFormat.XLSX);

    // Create a new worksheet in the workbook
    WorkSheet workSheet = workBook.CreateWorkSheet("data");

    // Add data and styles to the new worksheet
    workSheet["A1"].Value = "Name";
    workSheet["B1"].Value = "Email";
    workSheet["C1"].Value = "Marks";
    workSheet["D1"].Value = "Percentage";

    // Set styling for column headers
    workSheet["A1:D1"].Style.Font.Bold = true;

    // Filling the worksheet with data
    workSheet["A2"].Value = "Nick";
    workSheet["A3"].Value = "Roy";
    workSheet["A4"].Value = "Chris";
    workSheet["B2"].Value = "Nick@gmail.com";
    workSheet["B3"].Value = "Roy123@gmail.com";
    workSheet["B4"].Value = "Chris1999@gmail.com";
    workSheet["C2"].Value = "850";
    workSheet["C3"].Value = "710";
    workSheet["C4"].Value = "990";
    workSheet["D2"].Value = "85%";
    workSheet["D3"].Value = "71%";
    workSheet["D4"].Value = "99%";

    // Return the file as an Excel sheet
    return File(workBook.ToStream().ToArray(), "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Exported.xlsx");
}

Public Function OnPostExport() As FileResult
	' Create a new workbook with the Excel file format
	Dim workBook As New WorkBook(IronXL.ExcelFileFormat.XLSX)

	' Create a new worksheet in the workbook
	Dim workSheet As WorkSheet = workBook.CreateWorkSheet("data")

	' Add data and styles to the new worksheet
	workSheet("A1").Value = "Name"
	workSheet("B1").Value = "Email"
	workSheet("C1").Value = "Marks"
	workSheet("D1").Value = "Percentage"

	' Set styling for column headers
	workSheet("A1:D1").Style.Font.Bold = True

	' Filling the worksheet with data
	workSheet("A2").Value = "Nick"
	workSheet("A3").Value = "Roy"
	workSheet("A4").Value = "Chris"
	workSheet("B2").Value = "Nick@gmail.com"
	workSheet("B3").Value = "Roy123@gmail.com"
	workSheet("B4").Value = "Chris1999@gmail.com"
	workSheet("C2").Value = "850"
	workSheet("C3").Value = "710"
	workSheet("C4").Value = "990"
	workSheet("D2").Value = "85%"
	workSheet("D3").Value = "71%"
	workSheet("D4").Value = "99%"

	' Return the file as an Excel sheet
	Return File(workBook.ToStream().ToArray(), "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet", "Exported.xlsx")
End Function

This above code will create a workbook and return the file as an Excel sheet. This method is linked to the button, and once the button is clicked, it will automatically create and download the XLSX exported file.

Export an XLSX file in the browser

The data in the exported XLSX file

6. Export Data to CSV File

You can easily export CSV text files with one change in the above code. Just replace the return file code with the following, and your Razor page will return a CSV file.

return File(workBook.ToStream().ToArray(), "text/csv", "Student.csv");

return File(workBook.ToStream().ToArray(), "text/csv", "Student.csv");

Return File(workBook.ToStream().ToArray(), "text/csv", "Student.csv")

Export a CSV file in the browser

The data in the exported CSV file

7. Conclusion

Exporting data to Excel sheets and CSV files is a common task in web development, and Razor and IronXL make it easy to accomplish. With IronXL, developers can easily create Excel spreadsheets and save them to a file or stream. Razor can then be used to generate dynamic content that includes links to the Excel document, allowing users to download them directly from the web page. This makes it simple to create reports and other data-driven content that can be easily shared with others.

The combination of Razor and IronXL .NET Core Razor Pages provides a powerful toolset for web developers looking to create dynamic, data-driven web pages. To start using Razor and IronXL, one needs to have Visual Studio and .NET Core SDK installed. After that, creating a new Visual Studio project and installing the IronXL library can be done easily. Finally, by changing the interface of the home page and creating an OnPostExport method, developers can export data to Excel documents in a few simple steps.

To learn more about IronXL, Razor and how to export data to Excel and CSV files, please visit the following page.

IronXL is free to use for non-commercial development purposes. A free trial is available for testing in production. Look at the pricing plans for more details about prices and licensing.

Users can also benefit from Iron Suite, a Suite of 5 professional ASP.NET Core libraries including IronXL, IronPDF, and more.