csharp Excel导出EP Plus C类＃

Posted 2021-05-12

public static class ExcelExport
{
    public static void EpplusExportToExcel(List<SObject> sobjectList, string fileName, bool isAddDateTimeExt = false)
    {
        fileName = GetFileName(fileName, isAddDateTimeExt);

        List<string[]> arrayList = new List<string[]>();
        if (sobjectList != null && sobjectList.Count > 0)
        {
            //PropertyName leri alınıyor.
            var item = sobjectList.FirstOrDefault();
            {
                IList<SProperty> props = item.Properties;

                string[] pName = new string[props.Count];
                int index = 0;
                foreach (var p in props)
                {
                    pName[index] = p.Name;
                    index++;
                }
                arrayList.Add(pName);
            }

            //Value lar alınıyor.
            foreach (SObject obj in sobjectList)
            {
                IList<SProperty> props = obj.Properties;

                string[] array = new string[props.Count];
                int index = 0;

                foreach (SProperty prop in props)
                {
                    array[index++] = prop.Value;
                }

                arrayList.Add(array);
            }
        }

        using (var excelFile = new ExcelPackage())
        {
            ExcelWorksheet sheet = excelFile.Workbook.Worksheets.Add("Sayfa1");

            if (sobjectList.Count() > 0)
            {
                sheet.Cells["A1"].LoadFromArrays(arrayList);
            }

            Byte[] fileBytes = excelFile.GetAsByteArray();
            //Download ediyor.
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Private);
            HttpContext.Current.Response.Expires = -1;
            HttpContext.Current.Response.Buffer = true;

            HttpContext.Current.Response.Charset = System.Text.UTF8Encoding.UTF8.WebName;
            HttpContext.Current.Response.ContentEncoding = System.Text.UTF8Encoding.UTF8;
            HttpContext.Current.Response.ContentType = "application / vnd.openxmlformats - officedocument.spreadsheetml.sheet";
            HttpContext.Current.Response.AddHeader("content - disposition", "attachment; size =" + fileBytes.Length.ToString() + "; filename =\"" + fileName + "\"");
            HttpContext.Current.Response.BinaryWrite(fileBytes);
            HttpContext.Current.Response.End();

        }

    }
    public static void EpplusExportToExcelFromObjectList(List<object> myList, string fileName, bool isAddDateTimeExt = false)
    {
        fileName = GetFileName(fileName, isAddDateTimeExt);

        List<string[]> arrayList = new List<string[]>();
        if (myList != null)
        {
            //PropertyName leri alınıyor.
            for (int i = 0; i < 1; i++)
            {
                var item = myList.FirstOrDefault();
                {
                    Type itemType = item.GetType();

                    IList<PropertyInfo> props = itemType.GetProperties();
                    props = props.Where(m => m.GetGetMethod().IsVirtual == false).ToList();

                    string[] pName = new string[props.Count];
                    int index = 0;
                    foreach (var p in props)
                    {
                        var pCustAttribute = p.GetCustomAttributes(typeof(ExportAttribute), false);
                        if (pCustAttribute != null && pCustAttribute.Length > 0)
                        {
                            if (!((ExportAttribute)pCustAttribute[0]).IsVisible)
                                continue;
                            pName[index++] = ((ExportAttribute)pCustAttribute[0]).DisplayName;
                        }
                        else
                            pName[index++] = p.Name;
                    }
                    arrayList.Add(pName);
                }

            }

            //Value lar alınıyor.
            foreach (var item in myList)
            {
                Type itemType = item.GetType();

                IList<PropertyInfo> props = itemType.GetProperties();
                props = props.Where(m => m.GetGetMethod().IsVirtual == false).ToList();

                string[] array = new string[props.Count];
                int index = 0;

                foreach (PropertyInfo prop in props)
                {
                    var pCustAttribute = prop.GetCustomAttributes(typeof(ExportAttribute), false);
                    if (pCustAttribute != null && pCustAttribute.Length > 0)
                    {
                        if (!((ExportAttribute)pCustAttribute[0]).IsVisible)
                            continue;
                    }
                    array[index++] = prop.GetValue(item, null) != null ? prop.GetValue(item, null).ToString() : "";
                }

                arrayList.Add(array);
            }
        }

        using (var excelFile = new ExcelPackage())
        {
            ExcelWorksheet sheet = excelFile.Workbook.Worksheets.Add("Sayfa1");

            if (myList.Count() > 0)
            {
                sheet.Cells["A1"].LoadFromArrays(arrayList);
            }

            Byte[] fileBytes = excelFile.GetAsByteArray();
            //Download ediyor.
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Private);
            HttpContext.Current.Response.Expires = -1;
            HttpContext.Current.Response.Buffer = true;

            HttpContext.Current.Response.Charset = System.Text.UTF8Encoding.UTF8.WebName;
            HttpContext.Current.Response.ContentEncoding = System.Text.UTF8Encoding.UTF8;
            HttpContext.Current.Response.ContentType = "application / vnd.openxmlformats - officedocument.spreadsheetml.sheet";
            HttpContext.Current.Response.AddHeader("content - disposition", "attachment; size =" + fileBytes.Length.ToString() + "; filename =\"" + fileName + "\"");
            HttpContext.Current.Response.BinaryWrite(fileBytes);
            HttpContext.Current.Response.End();

        }

    }
    public static void EpplusExportToExcel<T>(List<T> myList, string fileName, bool isAddDateTimeExt = false)
    {
        fileName = GetFileName(fileName, isAddDateTimeExt);

        using (var excelFile = new ExcelPackage())
        {
            ExcelWorksheet sheet = excelFile.Workbook.Worksheets.Add("Result");
            var t = typeof(T);
            var Headings = t.GetProperties();
            for (int i = 0; i < Headings.Count(); i++)
            {

                sheet.Cells[1, i + 1].Value = Headings[i].Name;
            }

            if (myList.Count() > 0)
            {
                sheet.Cells["A2"].LoadFromCollection(myList.ToArray());
            }

            Byte[] fileBytes = excelFile.GetAsByteArray();
            //Download ediyor.
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Cache.SetCacheability(HttpCacheability.Private);
            HttpContext.Current.Response.Expires = -1;
            HttpContext.Current.Response.Buffer = true;

            HttpContext.Current.Response.Charset = System.Text.UTF8Encoding.UTF8.WebName;
            HttpContext.Current.Response.ContentEncoding = System.Text.UTF8Encoding.UTF8;
            HttpContext.Current.Response.ContentType = "application / vnd.openxmlformats - officedocument.spreadsheetml.sheet";
            HttpContext.Current.Response.AddHeader("content - disposition", "attachment; size =" + fileBytes.Length.ToString() + "; filename =\"" + fileName + "\"");
            HttpContext.Current.Response.BinaryWrite(fileBytes);
            HttpContext.Current.Response.End();
        }

    }
    /// <summary>
    /// Grid olarak kaydeder. List<object> de alabilir. Uzantısı xls veya html verilebilir.
    /// </summary>
    /// <typeparam name="T"></typeparam>
    /// <param name="list"></param>
    /// <param name="fileName"></param>
    /// <param name="isAdddateTimeExt"></param>
    public static void ExportToExcel<T>(List<T> list, string fileName, bool isAddDateTimeExt = false)
    {
        fileName = GetFileName(fileName, isAddDateTimeExt);
        var context = HttpContext.Current;
        var attachment = "attachment; filename =" + fileName;
        context.Response.Clear();
        context.Response.AddHeader("content - disposition", attachment);
        context.Response.AddHeader("Pragma", "public");
        context.Response.AddHeader("Cache-Control", "max-age=0");
        context.Response.ContentType = "application/vnd.ms-excel";
        context.Response.ContentEncoding = Encoding.GetEncoding("windows-1254");
        context.Response.Charset = "windows-1254";

        const string headerStart = "<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\">\n" +
        "<html xmlns =\"http://www.w3.org/1999/xhtml\">" +
        "\n<head>\n" +
        "<title></title>\n" +
        "<meta http-equiv=\"Content-Type\" content=\"text/html; charset=windows-1254\" />\n" +
        "<style>\n</style>\n" +
        "</head>\n" +
        "<body>\n";

        const string headerEnd = "\n</body>\n" +
        "</html>";

        var gridView = new System.Web.UI.WebControls.GridView
        {
            AutoGenerateColumns = true,
            AllowSorting = false,
            AllowPaging = false
        };

        using (var sw = new StringWriter())
        {
            using (var htw = new HtmlTextWriter(sw))
            {
                gridView.DataSource = list;
                gridView.DataBind();
                gridView.RenderControl(htw);
            }

            context.Response.Write(headerStart + sw + headerEnd);
            context.Response.Flush();
        }

    }

    private static string GetFileName(string fileName, bool isAddDateTimeExt)
    {
        string[] file = fileName.Split(‘.’);
        if (file.Count() == 1)
        {
            Array.Resize(ref file, 2);
            file[1] = "xls";
            fileName = file[0] + "." + file[1];
        }

        if (isAddDateTimeExt)
            fileName = file[0] + "_" + DateTime.Now.ToString().Replace(".", "").Replace(" ", "").Replace(":", "") + "." + file[1];
        return fileName;
    }
}