在Web API Core 3.1中动态显示RDLC报告中的图像

using Microsoft.Reporting.WebForms;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Web.Http;

public class ReportController : ApiController
{
    public HttpResponseMessage GetReport()
    {
        // 创建ReportViewer控件
        var reportViewer = new ReportViewer();
        reportViewer.ProcessingMode = ProcessingMode.Local;

        // 设置RDLC报告文件路径
        var reportPath = Path.Combine(System.Web.Hosting.HostingEnvironment.MapPath("~/Reports"), "SampleReport.rdlc");
        reportViewer.LocalReport.ReportPath = reportPath;

        // 设置报表数据源
        var dataSource = new ReportDataSource("DataSet1", GetReportData());
        reportViewer.LocalReport.DataSources.Add(dataSource);

        // 设置动态图像数据
        var imageData = GetImageData();
        var imageDataSource = new ReportDataSource("ImageDataSet", imageData);
        reportViewer.LocalReport.DataSources.Add(imageDataSource);

        // 渲染报告为字节数组
        var renderedBytes = reportViewer.LocalReport.Render("PDF");

        // 创建HttpResponseMessage并返回报告字节数组
        var response = new HttpResponseMessage(HttpStatusCode.OK);
        response.Content = new ByteArrayContent(renderedBytes);
        response.Content.Headers.ContentType = new System.Net.Http.Headers.MediaTypeHeaderValue("application/pdf");
        response.Content.Headers.ContentDisposition = new System.Net.Http.Headers.ContentDispositionHeaderValue("attachment")
        {
            FileName = "Report.pdf"
        };

        return response;
    }

    private DataTable GetReportData()
    {
        // 获取报表数据源
        // 这里可以根据实际需求从数据库或其他数据源中获取数据
        var dataTable = new DataTable("DataSet1");
        // 添加报表数据列和行
        // ...

        return dataTable;
    }

    private DataTable GetImageData()
    {
        // 获取动态图像数据
        // 这里可以根据实际需求从数据库或其他数据源中获取图像数据
        var dataTable = new DataTable("ImageDataSet");
        // 添加图像数据列和行
        // ...

        return dataTable;
    }
}