带有两个表格的报告查看器

Question

我在 asp.net mvc 中创建报表查看器。但是我有 2 个表有关系，并且在报告查看器中，当我从其他表中导出报告数据时，不仅仅是名称。 例如我在Expense水里有

但是当我导出时它没有显示在表格中。

这是我的模特：

public class Expenses
{
    [Key]
    public int Expenses_Id { get; set; }
    public string Expenses_Type { get; set; }
}


 public class ExpenseDetails
{
    [Key]
    public int ExpenseDetails_Id { get; set; }

    public double Amount { get; set; }

    public DateTime DateExpense { get; set; }

    public int ExpensesId { get; set; }

    [ForeignKey("ExpensesId")]
    public virtual Expenses expenses { get; set; }
}

这是我的报告代码：

 public ActionResult Reports(string ReportType)
    {
        LocalReport localreport = new LocalReport();
        localreport.ReportPath = Server.MapPath("~/Reports/ExpenseReport.rdlc");

        ReportDataSource reportDataSource = new ReportDataSource();
        reportDataSource.Name = "ExpenseDataSet";
        reportDataSource.Value = _context.ExpenseDetails.ToList();
        localreport.DataSources.Add(reportDataSource);

        string reportType = ReportType;
        string mimeType;
        string encoding;
        string fileNameExtension;

        if (reportType == "Excel")
        {
            fileNameExtension = "xlsx";
        }

        if (reportType == "Word")
        {
            fileNameExtension = "docx";
        }

        if (reportType == "PDF")
        {
            fileNameExtension = "pdf";
        }

        else
        {
            fileNameExtension = "jpg";

        }

        string[] streams;
        Warning[] warnings;
        byte[] renderedByte;

        renderedByte = localreport.Render(reportType, "", out mimeType, out encoding, out fileNameExtension, out streams, out warnings);

        Response.AddHeader("content-disposition", "attachment;filename = expens_report." + fileNameExtension);

        return File(renderedByte, fileNameExtension);
    }

谢谢。

Answer 1

您是否刷新了 .rdlc 中的数据集？如果是在添加外键之前创建的，则需要删除 .rdlc 数据集和数据源，然后创建一个新的。

创建一个 DTO 怎么样？有时更容易创建复杂的对象列表，用您想要的数据填充它并将其发送到 rdlc。在这种情况下，您需要与 rdlc 有一个单独的项目，并添加对主项目的引用。这允许您将 DTO 作为对象导入。

            List<ExpenseDetailsDTO> list = new List<ExpenseDetailsDTO>()
        {
            new ExpenseDetailsDTO
            {
                Amount = 10,
                DateExpense = DateTime.UtcNow,
                ExpenseDetails_Id  = 1,
                Expenses_Id = 1,
                Expenses_Type = "asd"
            },
            new ExpenseDetailsDTO
            {
                Amount = 10,
                DateExpense = DateTime.UtcNow,
                ExpenseDetails_Id  = 1,
                Expenses_Id = 1,
                Expenses_Type = "asd"
            },
            new ExpenseDetailsDTO
            {
                Amount = 10,
                DateExpense = DateTime.UtcNow,
                ExpenseDetails_Id  = 1,
                Expenses_Id = 1,
                Expenses_Type = "asd"
            },
            new ExpenseDetailsDTO
            {
                Amount = 10,
                DateExpense = DateTime.UtcNow,
                ExpenseDetails_Id  = 1,
                Expenses_Id = 1,
                Expenses_Type = "asd"
            },
        };




        reportDataSource.Name = "testdatasource";
        reportDataSource.Value = list;
        localReport.DataSources.Add(reportDataSource);

在迁移旧 API 时，至少在过去 4 个月里，这样的方法对我有用。