1.创建excel方法
/// <summary> /// 创建Excel表格 /// </summary> /// <param name="dt">数据流</param> /// <param name="FileName">文件名称</param> public static void CreateExcel(DataTable dt, string FileName) { StringBuilder strb = new StringBuilder(); strb.Append(" <html xmlns:o="urn:schemas-microsoft-com:office:office""); strb.Append("xmlns:x="urn:schemas-microsoft-com:office:excel""); strb.Append("xmlns="http://www.w3.org/TR/REC-html40">"); strb.Append(" <head> <meta http-equiv='Content-Type' content='text/html; charset=gb2312'>"); strb.Append(" <style>"); strb.Append(".xl26"); strb.Append(" {mso-style-parent:style0;"); strb.Append(" font-family:"Times New Roman", serif;"); strb.Append(" mso-font-charset:0;"); strb.Append(" mso-number-format:"@";}"); strb.Append(" </style>"); strb.Append(" <xml>"); strb.Append(" <x:ExcelWorkbook>"); strb.Append(" <x:ExcelWorksheets>"); strb.Append(" <x:ExcelWorksheet>"); strb.Append(" <x:Name>Sheet1 </x:Name>"); strb.Append(" <x:WorksheetOptions>"); strb.Append(" <x:DefaultRowHeight>285 </x:DefaultRowHeight>"); strb.Append(" <x:Selected/>"); strb.Append(" <x:Panes>"); strb.Append(" <x:Pane>"); strb.Append(" <x:Number>3 </x:Number>"); strb.Append(" <x:ActiveCol>1 </x:ActiveCol>"); strb.Append(" </x:Pane>"); strb.Append(" </x:Panes>"); strb.Append(" <x:ProtectContents>False </x:ProtectContents>"); strb.Append(" <x:ProtectObjects>False </x:ProtectObjects>"); strb.Append(" <x:ProtectScenarios>False </x:ProtectScenarios>"); strb.Append(" </x:WorksheetOptions>"); strb.Append(" </x:ExcelWorksheet>"); strb.Append(" <x:WindowHeight>6750 </x:WindowHeight>"); strb.Append(" <x:WindowWidth>10620 </x:WindowWidth>"); strb.Append(" <x:WindowTopX>480 </x:WindowTopX>"); strb.Append(" <x:WindowTopY>75 </x:WindowTopY>"); strb.Append(" <x:ProtectStructure>False </x:ProtectStructure>"); strb.Append(" <x:ProtectWindows>False </x:ProtectWindows>"); strb.Append(" </x:ExcelWorkbook>"); strb.Append(" </xml>"); strb.Append(""); strb.Append(" </head> <body> <table align="center" style='border-collapse:collapse;table-layout:fixed'> <tr>"); //写列标题 int columncount = dt.Columns.Count; for (int columi = 0; columi < columncount; columi++) { strb.Append(" <td> <b>" + dt.Columns[columi] + " </b> </td>"); } strb.Append(" </tr>"); //写数据 for (int i = 0; i < dt.Rows.Count; i++) { strb.Append(" <tr>"); for (int j = 0; j < dt.Columns.Count; j++) { strb.Append(" <td class='xl26'>" + dt.Rows[i][j].ToString() + " </td>"); } strb.Append(" </tr>"); } strb.Append(" </table>"); strb.Append(" </body> </html>"); HttpContext.Current.Response.Clear(); HttpContext.Current.Response.Buffer = true; HttpContext.Current.Response.Charset = "GB2312"; HttpContext.Current.Response.AppendHeader("Content-Disposition", "attachment;filename=" + FileName); HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文 HttpContext.Current.Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。 HttpContext.Current.Response.Write(strb); HttpContext.Current.Response.End(); }
2.List集合转DateTable，根据属性特性[System.ComponentModel.Description("列名称")]指定名称，没有指定名称列则不会导出
#region List集合转DateTable /// <summary> /// List集合转DateTable /// </summary> /// <typeparam name="T">泛型类</typeparam> /// <param name="items">参数名</param> /// <returns></returns> private DataTable ToDataTable<T>(List<T> items) { var tb = new DataTable(typeof(T).Name); List<PropertyInfo> props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance).ToList(); #region MyRegion //foreach (PropertyInfo prop in props) //{ // string name = ""; // //获取特性值 // object[] da = prop.GetCustomAttributes(typeof(DescriptionAttribute), false); // if (da.Length != 0) // { // name = (da[0] as DescriptionAttribute).Description; // Type t = GetCoreType(prop.PropertyType); // tb.Columns.Add(name, t); // } // else // { // //name = prop.Name; // props.Remove(prop); // } //} #endregion for (int i = 0; i < props.Count; i++) { string name = ""; //获取特性值 object[] da = props[i].GetCustomAttributes(typeof(DescriptionAttribute), false); if (da.Length != 0) { name = (da[0] as DescriptionAttribute).Description; Type t = GetCoreType(props[i].PropertyType); tb.Columns.Add(name, t); } else { //name = prop.Name; props.Remove(props[i]); i--; } } foreach (T item in items) { var values = new object[props.Count]; for (int i = 0; i < props.Count; i++) { values[i] = props[i].GetValue(item, null); } tb.Rows.Add(values); } return tb; } public static bool IsNullable(Type t) { return !t.IsValueType || (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>)); } public static Type GetCoreType(Type t) { if (t != null && IsNullable(t)) { if (!t.IsValueType) { return t; } else { return Nullable.GetUnderlyingType(t); } } else { return t; } } #endregion
3.创建数据源，调用方法
public void UserWithdrawExcelList() { //数据源，根据自己需要来取 List<UserWithdrawQueryViewModel> userList = UserWithdrawBLL.GetUserWithdrawListExcel(paramdic); DataTable dt = ToDataTable<UserWithdrawQueryViewModel>(userList); #region MyRegion //DataTable dt = new DataTable(); //dt.Columns.Add("用户名", typeof(String)); //dt.Columns.Add("提现标题", typeof(String)); //dt.Columns.Add("提现总金额", typeof(String)); //dt.Columns.Add("实际到账金额", typeof(String)); //dt.Columns.Add("提现手续费", typeof(String)); //dt.Columns.Add("提现账户", typeof(String)); //dt.Columns.Add("提现状态", typeof(String)); //dt.Columns.Add("创建时间", typeof(DateTime)); //userList.TryForEach(t => //{ // dt.Rows.Add(new object[] { // t.UserName,t.WithTitle,t.WithTotalAmount,t.WithAmount,t.CounterFee,t.BankCode,t.StatusName,t.AddTime // }); //}); #endregion DataView dv = dt.DefaultView;//获取表视图 dv.ToTable();//转为表 DataChangeExcel.CreateExcel(dt, DateTime.Now.ToString("yyyyMMddHHmmssffff") + ".xls"); }