WTM(ASP.NET 5)接入fastreport简单通用方案（采用api方式用流文件返回）
目前使用WTM小伙伴目前前端的UI选择有layui、vue和blazor三种方案。为了方便起见，采用api的方式，对fastreport生成的pdf报表统一流文件返回。
一、导入设置本地nuget源，并导入fastreport类库。
在vs菜单栏中选择工具→Nuget报管理器→程序包管理器设置→程序包源中添加fastreport的本地包源，将源地址指向你的fastreport nuget路径，路径中最好不要有中文。
在nuget中将程序包源切换本地fastreport源，搜索fastreport.Core，选择Fastreport.Core并安装。
将程序包源切换为默认的nuget.org，搜索FastReport.Compat，并安装。注意：这里有个坑，如果是WTM项目，则需要先安装Microsoft.CodeAnalysis.Common类库，版本在3.8.0以上。默认的模板项目则不需要。
二、导入做好的fastreport模板，.frx文件
在web项目的wwwroot文件下，新建report目录。将做好的.frx文件放复制进去。github下载.frx示例文件。
三、代码编写
示例代码：
先新建2个测试用的实体类：
public class Category
{
private string FName;
private string FDescription;
private List FProducts;
public string Name
{
get { return FName; }
}
public string Description
{
get { return FDescription; }
}
public List Products
{
get { return FProducts; }
}
public Category(string name, string description)
{
FName = name;
FDescription = description;
FProducts = new List();
}
}
public class Product
{
private string FName;
private decimal FUnitPrice;
public string Name
{
get { return FName; }
}
public decimal UnitPrice
{
get { return FUnitPrice; }
}
public Product(string name, decimal unitPrice)
{
FName = name;
FUnitPrice = unitPrice;
}
} [Area("TEST")]
[AuthorizeJwtWithCookie]
[ActionDescription("报表管理")]
[ApiController]
[Route("api/FastReport")]
[Public]
public class FastReportController : Controller
{
private readonly IWebHostEnvironment _hostingEnvironment;
public FastReportController(IWebHostEnvironment hostingEnvironment)
{
_hostingEnvironment = hostingEnvironment;
}
private static List businessObjects;
[HttpGet("Test")]
public IActionResult Test()
{
string webRootPath = _hostingEnvironment.WebRootPath ;
CreateBusinessObject();
Report report = new Report();
report.Load(webRootPath + "\\Report\\report.frx");
report.RegisterData(businessObjects, "Categories");
report.Prepare();
PDFExport export = new PDFExport();
MemoryStream stream = new MemoryStream();
report.Export(export, stream);
var t = stream.GetBuffer();
stream.Close();
report.Dispose();
Response.Headers.Add("Cache-Control", "max-age=31536000, must-revalidate");
Response.Headers.Add("accept-ranges", "bytes");
Response.Headers.Add("Access-Control-Expose-Headers", "Content-Disposition");
return File(t, "application/pdf");
}
private static void CreateBusinessObject()
{
businessObjects = new List();
Category category = new Category("Beverages", "Soft drinks, coffees, teas, beers");
category.Products.Add(new Product("Chai", 18m));
category.Products.Add(new Product("Chang", 19m));
category.Products.Add(new Product("Ipoh coffee", 46m));
businessObjects.Add(category);
category = new Category("Confections", "Desserts, candies, and sweet breads");
category.Products.Add(new Product("Chocolade", 12.75m));
category.Products.Add(new Product("Scottish Longbreads", 12.5m));
category.Products.Add(new Product("Tarte au sucre", 49.3m));
businessObjects.Add(category);
category = new Category("Seafood", "Seaweed and fish");
category.Products.Add(new Product("Boston Crab Meat", 18.4m));
category.Products.Add(new Product("Red caviar", 15m));
businessObjects.Add(category);
}
} 在PC的前端，直接window.open(url)扔给浏览器就可以了。简单粗暴！
例如blazor
@page "/Report/TestPeport"
@inherits BasePage
@attribute [ActionDescription("fastreport测试", "BlazorFastReportDemo.Areas.FastReport.Controllers,FastReport")]
@inject IJSRuntime JS
@code {
private async Task GotoReport()
{
await JS.InvokeVoidAsync("$.test", "/api/FastReport/Test");
}
}四、效果
