using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using ClosedXML.Excel; using System.IO; using System.Data; using System.Web; using System.Reflection; using System.ComponentModel; namespace VML.Blacklist.Web.Common.Utils { public class ExcelHelper { public ExcelHelper() { } private DataTable dataTable = new DataTable(); private StringBuilder builder = new StringBuilder(); public PropertyInfo[] GetPropertyInfoArray(Type type) { PropertyInfo[] props = null; try { object obj = Activator.CreateInstance(type); //props = (from r in type.GetProperties(BindingFlags.Public | BindingFlags.Instance) // where r.GetCustomAttribute(typeof(DisplayNameAttribute)) != null // select r).ToArray(); props = type.GetProperties(BindingFlags.Instance | BindingFlags.Public) .Select(x => new { Property = x, Attribute = (ExportAttribute)Attribute.GetCustomAttribute(x, typeof(ExportAttribute), true) }) .Where(x => x.Property.GetCustomAttribute(typeof(DisplayNameAttribute)) != null ) .OrderBy(x => x.Attribute != null ? x.Attribute.FieldOrder : -1) .Select(x => x.Property ) .ToArray(); } catch (Exception ex) { AppLogger.LogErrorOnly(ex); } return props; } public void AppendRow(PropertyInfo[] props) { if (props != null && props.Length > 0) { foreach (PropertyInfo prop in props) { dataTable.Columns.Add(new DataColumn(prop.Name)); } } } public void ExportDataToExcel(Type type, Object[] objectList, string fileName) { PropertyInfo[] props = GetPropertyInfoArray(type); AppendRow(props); foreach (object obj in objectList) { DataRow dr = dataTable.NewRow(); for (int i = 0; i < props.Length; i++) { dr[props[i].Name] = props[i].GetValue(obj, null) != null ? props[i].GetValue(obj, null) : ""; } this.dataTable.Rows.Add(dr); } ExportDataToExcel(this.dataTable, fileName); } public void ExportDataToExcel(DataTable dt, string fileName) { using (XLWorkbook wb = new XLWorkbook()) { var ws = wb.Worksheets.Add(dt, "ws"); wb.Style.Alignment.Horizontal = XLAlignmentHorizontalValues.Center; wb.Style.Font.Bold = true; //set header style ws.Rows(1, 1).Style.Fill.BackgroundColor = XLColor.White; ws.Rows(1, 1).Style.Font.Bold = true; ws.Rows(1, 1).Style.Font.FontColor = XLColor.Onyx; ws.Columns().Width = 30; //remove AutoFilter ws.Tables.FirstOrDefault().ShowAutoFilter = false; HttpContext.Current.Response.Clear(); HttpContext.Current.Response.Buffer = true; HttpContext.Current.Response.Charset = "utf-8"; HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"; HttpContext.Current.Response.AddHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx"); using (MemoryStream MyMemoryStream = new MemoryStream()) { wb.SaveAs(MyMemoryStream); MyMemoryStream.WriteTo(HttpContext.Current.Response.OutputStream); HttpContext.Current.Response.Flush(); HttpContext.Current.Response.End(); } } } } }
时间: 2024-08-09 22:40:20