从数据库中提取数据并使用 ASP.NET Core MVC 将其保存为 Excel 文件
[英]Extract data from the database and save it as an Excel file using ASP.NET Core MVC
问题描述
I have written a web application to get the data from the database in which the user would select the start date and end date of the data they want to have and then submit which later is saved to an Excel file.
我编写了一个 web 应用程序来从数据库中获取数据，用户将在其中 select 他们想要拥有的数据的开始日期和结束日期，然后提交，然后将其保存到 ZC1D81AF5835844B4E9D936910 文件中。
The application only works when not attached to the form, however it doesn't do anything when I include the start date and end date.该应用程序仅在未附加到表单时才有效，但是当我包含开始日期和结束日期时它不会做任何事情。
Here is my HomeController code snippet:这是我的HomeController代码片段：
namespace Task1.Controllers
{
public class HomeController : Controller
{
// GET
[HttpGet]
public IActionResult Index()
{
var model = new FormBoard();
var form = new FormBoard.Form();
form.StartDate = DateTime.UtcNow;
form.EndDate = DateTime.UtcNow;
return View(model);
}
[HttpPost]
public IActionResult ExportExcelData(FormBoard viewModel)
{
IEnumerable<ReportData> results;
var connection = @"server=remoteserver;Database=introsw;Uid=root;Pwd=12345";
using var con = new SqlConnection(connection);
{
con.Open();
results = con.Query<ReportData>(@"SELECT
document_date as [DocumentDate],
document_number as [DocumentNumber],
description as [Description],
project__code as [ProjectCode],
project__name as [ProjectName],
client__name as [ClientName],
client__account as [ClientAccount],
total_incl_vat as [TotalIncVat]
FROM
customer_documents_full_view
WHERE
document_date BETWEEN 'StartDate' AND 'EndDate'
");
XLWorkbook workbook = new XLWorkbook();
workbook.Worksheets.Add("Sample").Cell(1, 1).SetValue(results);
var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
MemoryStream memoryStream = new MemoryStream();
workbook.SaveAs((Stream) memoryStream);
memoryStream.Seek(0L, SeekOrigin.Begin);
var content = memoryStream.ToArray();
Console.Write(content);
return File(content, contentType, "Datafile.xlsx");
}
public class ReportData
{
public DateTime DocumentDate { get; set; }
public string DocumentNumber { get; set; }
public string Description { get; set; }
public string ProjectCode { get; set; }
public string ProjectName { get; set; }
public string ClientName { get; set; }
public string ClientAccount { get; set; }
public Decimal TotalIncVat { get; set; }
}
}
}
My view model form is as follows;我的view model表格如下；
using System;
using System.ComponentModel.DataAnnotations;
namespace Task1.ViewModels
{
public class FormBoard
{
public class Form
{
public int Id { get; set; }
// start date
[Required]
public DateTime StartDate { get; set; }
// end data
[Required]
public DateTime EndDate { get; set; }
}
}
}
and finally my view is as follow, which is what I want to get the data for the specified dates by the user in the database;最后我的view如下，这就是我想在数据库中获取用户指定日期的数据；
@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers
@model Task1.ViewModels.FormBoard
@{
ViewData["Title"] = "Index";
}
<!DOCTYPE html>
<html>
<head>
<!-- Compiled and minified CSS -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/css/materialize.min.css">
<!-- Compiled and minified JavaScript -->
<script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/1.0.0/js/materialize.min.js"></script>
</head>
<body>
<div class="container">
<div class="row">
<h2>Fill in Date</h2>
<form method="post" asp-controller="Home" asp-action="Index" >
<div>
<label >Start:</label>
<input type="date" name="StartDate"
class="input-validation-error"
data-val="true"
data-val-required="The start date field is required"
id="StartDate" value="">
</div>
<div>
<label >End:</label>
<input type="date" name="EndDate" >
</div>
<div class="center">
<button type="submit" class="btn" >Submit</button>
</div>
</form>
</div>
</div>
</body>
</html>
This is how the form displays in the browser and once the user click submit, then an Excel file should be generated with an option to save it from the data from the db with the user's specified dates.这就是表单在浏览器中的显示方式，一旦用户单击提交，则应生成一个 Excel 文件，并带有一个选项，可以从数据库中的数据中保存它，并使用用户指定的日期。
1 个解决方案
解决方案1
0 2021-03-08 10:02:27
I have figured it out so what I did was change a line in my view file,我已经想通了，所以我所做的是在我的视图文件中更改一行，
<form method="post" asp-controller="Home" asp-action="Index" >
changed to:变成：
<form method="post" asp-controller="Home" asp-action="ExportExcelData" >
and have added a class in my Controller并在我的 Controller 中添加了Controller
public class ReportParams
{
public DateTime StartDate { get; set; }
public DateTime EndDate { get; set; }
}
Which I then changed my ExportExcelData class to;然后我将我的ExportExcelData class 更改为；
[HttpPost]
public IActionResult ExportExcelData(ReportParams reportParams)
{
IEnumerable<ReportData> results;
var connection = @"server=remoteserver;Database=introsw;Uid=root;Pwd=12345";
using var con = new SqlConnection(connection);
con.Open();
results = con.Query<ReportData>(@"SELECT
document_date as [DocumentDate],
document_number as [DocumentNumber],
description as [Description],
project__code as [ProjectCode],
project__name as [ProjectName],
client__name as [ClientName],
client__account as [ClientAccount],
total_incl_vat as [TotalIncVat]
FROM
customer_documents_full_view
WHERE
document_date BETWEEN @StartDate AND @EndDate
", reportParams);
XLWorkbook workbook = new XLWorkbook();
workbook.Worksheets.Add("Sample").Cell(1, 1).SetValue(results);
var contentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
MemoryStream memoryStream = new MemoryStream();
workbook.SaveAs((Stream) memoryStream);
memoryStream.Seek(0L, SeekOrigin.Begin);
var content = memoryStream.ToArray();
Console.Write(content);
Console.WriteLine("Export Excel Data");
return File(content, contentType, "Datafile.xlsx");
}
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