Question

这是我的代码，用于从单个excel工作表中的多个表下载数据。如何在此代码中添加两个日期？该代码非常适合下载，但我需要下载两个日期。

控制器这是两个表，使用datatable从数据库中选择所有数据

    Table 1

        private DataTable getTable1()
            {
                string constr = ConfigurationManager.ConnectionStrings["db_Demo"].ConnectionString;
                using (SqlConnection con = new SqlConnection(constr))
                {
                    using (SqlCommand cmd = new SqlCommand("SELECT * FROM Table1 ORDER BY ID"))
                    {
                        using (SqlDataAdapter da = new SqlDataAdapter())
                        {
                            DataTable dt = new DataTable();
                            cmd.CommandType = CommandType.Text;
                            cmd.Connection = con;
                            da.SelectCommand = cmd;
                            da.Fill(dt);
                            return dt;
                        }
                    }
                }
            }

    Table 1
        private DataTable getTable2()
            {
                string constr = ConfigurationManager.ConnectionStrings["db_Demo"].ConnectionString;
                using (SqlConnection con = new SqlConnection(constr))
                {
                    using (SqlCommand cmd = new SqlCommand("SELECT * FROM Table2 ORDER BY ID"))
                    {
                        using (SqlDataAdapter da = new SqlDataAdapter())
                        {
                            DataTable dt = new DataTable();
                            cmd.CommandType = CommandType.Text;
                            cmd.Connection = con;
                            da.SelectCommand = cmd;
                            da.Fill(dt);
                            return dt;
                        }
                    }
                }
            }

    public DataSet getDataSetExportToExcel()
        {
            DataSet ds = new DataSet();

            DataTable dtTable1 = new DataTable("Table1");
            dtTable1 = getTable1();

            DataTable dtTable2 = new DataTable("Table2");
            dtTable2 = getTable2();


ds.Tables.Add(dtTable1);
            ds.Tables.Add(dtTable2);
            return ds;
        }

    public ActionResult btn_Export_Click()
        {
            DataSet ds = getDataSetExportToExcel();
            using (XLWorkbook wb = new XLWorkbook())
            {
                wb.Worksheets.Add(ds);
                wb.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
                wb.Style.Font.Bold = true;
                Response.Clear();
                Response.Buffer = true;
                Response.Charset = "";
                Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
                Response.AddHeader("content-disposition", "attachment;filename= TablesData.xlsx");
                using (MemoryStream MyMemoryStream = new MemoryStream())
                {
                    wb.SaveAs(MyMemoryStream);
                    MyMemoryStream.WriteTo(Response.OutputStream);
                    Response.Flush();
                    Response.End();
                }
            }
            return View();
        }

查看这些是日期

<div>
    To: <input type="date" value="startdate" />
    From: <input type="date" value="enddate" />
</div>

<div>
    <a href="@Url.Action("btn_Export_Click", "Data")" class="btn btn-success"> Export Data</a>
</div>

Answer 1

假设表中的日期字段称为“ RefDate”，则可以尝试执行以下操作：

private static DataTable GetTable(string table, DateTime startDate, DateTime endDate)
{
    string constr = ConfigurationManager.ConnectionStrings["db_Demo"].ConnectionString;
    using (SqlConnection con = new SqlConnection(constr))
    {
        using (SqlCommand cmd = new SqlCommand($"SELECT * FROM {table} WHERE RefDate BETWEEN @startDate AND @endDate ORDER BY ID"))
        {
            var startDateParameter = new SqlParameter("@startDate", SqlDbType.DateTime);
            startDateParameter.Value = startDate;

            var endDateParemeter = new SqlParameter("@endDate", SqlDbType.DateTime);
            endDateParemeter.Value = endDate;

            cmd.Parameters.Add(startDateParameter);
            cmd.Parameters.Add(endDateParemeter );

            using (SqlDataAdapter da = new SqlDataAdapter())
            {
                DataTable dt = new DataTable();
                cmd.CommandType = CommandType.Text;
                cmd.Connection = con;
                da.SelectCommand = cmd;
                da.Fill(dt);
                return dt;
            }
        }
    }
}


private static DataSet GetDataSetExportToExcel(DateTime startDate, DateTime endDate)
{

    var dtTable1 = GetTable("Table1", startDate, endDate);
    var dtTable2 = GetTable("Table2", startDate, endDate);

    var ds = new DataSet();
    ds.Tables.Add(dtTable1);
    ds.Tables.Add(dtTable2);
    return ds;
}

[HttpGet]
public ActionResult Export()
{
    return View();
}

[HttpPost]
public ActionResult Export(DateTime startDate, DateTime endDate)
{
        DataSet ds = GetDataSetExportToExcel(startDate, endDate);
        using (XLWorkbook wb = new XLWorkbook())
        {
            wb.Worksheets.Add(ds);
            wb.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center;
            wb.Style.Font.Bold = true;
            Response.Clear();
            Response.Buffer = true;
            Response.Charset = "";
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
            Response.AddHeader("content-disposition", "attachment;filename= TablesData.xlsx");
            using (MemoryStream MyMemoryStream = new MemoryStream())
            {
                wb.SaveAs(MyMemoryStream);
                MyMemoryStream.WriteTo(Response.OutputStream);
                Response.Flush();
                Response.End();
            }
        }
        return View();
 }

您需要将视图重命名为“导出”，并对其进行调整以通过以下方式发送数据：

@using (Html.BeginForm("Export", "Form", FormMethod.Post))
{
    <div>
        <label for="startDate">From:</label>
        @Html.TextBox("startDate", "{0:dd/MM/yyyy}", 
            new { @class = "form-control date", type = "date" })

        <label for="endDate">To:</label>
        @Html.TextBox("endDate", "{0:dd/MM/yyyy}", 
            new { @class = "form-control date", type = "date" })
    </div>

    <input type="submit" class="btn btn-success" value="Export Data" />
}

MVC在两个日期之间从数据库下载数据

1 个答案: