TowerSoft HtmlToExcel

Small Nuget package that uses AngleSharp to read an HTML table and generate an Excel file using ClosedXML

Usage

Single sheet

string htmlString = "<table><tbody><tr><td>Cell contents</td></tr></tbody></table>";

byte[] fileData = new WorkbookGenerator().FromHtmlString(htmlString);

Multiple sheets

string htmlString1 = "<table><tbody><tr><td>Cell contents</td></tr></tbody></table>";
string htmlString2 = "<table><tbody><tr><td>Cell contents</td></tr></tbody></table>";

byte[] fileData;
using (WorkbookBuilder workbookBuilder = new WorkbookBuilder()) {
    workbookBuilder.AddSheet("sheet1", htmlString1);
    workbookBuilder.AddSheet("sheet2", htmlString2);

    fileData = workbookBuilder.GetAsByteArray();
}

Settings

Some settings do not work if there are any colspans in the table. This is because Excel does not allow tables with merged cells and those settings only work in tables.

Setting Name	Default Value	Description
AutofitColumns	true	Enables/disables fitting the width of the columns to fit the contents.
ShowFilter	true	Enables/disables showing table filters. Does not work with the table has any colspans.
ShowRowStripes	true	Enables/disables row stripes. Does not work with the table has any colspans.

You can change the settings using HtmlToExcellSettings and passing it in the constructor of htmlToEzxel

HtmlToExcelSettings settings = HtmlToExcelSettings.Defaults;
settings.AutofitColumns = false;
settings.ShowFilter = false;
settings.ShowRowStripes = false;

// Using custom settings with a single sheet
byte[] fileData new WorkbookGenerator(settings).FromHtmlString(htmlString);

// Using custom settings with multiple sheets
using (WorkbookBuilder workbookBuilder = new WorkbookBuilder(settings) {
    // Settings can also be used in the AddSheet method which overrides the setting on the WorkbookBuilder
    workbookBuilder.AddSheet("sheetName", htmlString, settings)
}

Individual Cell Options

Attribute Name	Expected Data Type	Comments
data-excel-hyperlink	URI	Creates a hyperlink on the cell. Must be a parsable absolute URI.
data-excel-bold	Boolean	Sets if the cell style will be set to bold.
data-type	String	Sets the data type for the cell. Valid options are: Text, Number, Boolean, DateTime, TimeSpan
data-format	String	Sets the cell format. Only works with data-type="Number" and data-type="DateTime"
data-excel-comment	String	Adds a comment to the cell
data-excel-comment-author	String	Sets the author for the comment
colspan	Integer	Merges this cell with the following cells

ASP Core Example

Add the following code to your project to render a view to a string: CustomController.cs

Use this example to return the file to the client. Make sure you change the inherited class to your custom controller class.

public class HomeController : CustomController {
    public IActionResult ExcelFile() {
        var model = //Get model data

        string htmlString = RenderViewAsync("viewName", model, true);
        byte[] fileData = new WorkbookGenerator().FromHtmlString(htmlString);

        return File(fileData, MimeType.xlsx, "filename.xlsx");
    }
}

MVC 5 Example

Add the following code to your project to render a view to a string: ViewExtensions.cs

public ActionResult GetExcelFile() {
    var model = //Get model data

    string htmlString = PartialView("ViewName", model).RenderToString();
    byte[] fileData = new WorkbookGenerator().FromHtmlString(htmlString);

    return File(fileData, MimeType.xlsx, "filename.xlsx");
}

mediabuff / HtmlToExcel