使用using System.IO;

        ////// 导出Excel文件，并自定义文件名///public static void DataTableExcel(System.Data.DataTable dtData, String FileName){GridView dgExport = null;HttpContext curContext = HttpContext.Current;StringWriter strWriter = null;HtmlTextWriter htmlWriter = null;if (dtData != null){HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);curContext.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");curContext.Response.ContentType = "application nd.ms-excel";curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;curContext.Response.Charset = "GB2312";strWriter = new StringWriter();htmlWriter = new HtmlTextWriter(strWriter);dgExport = new GridView();dgExport.DataSource = dtData.DefaultView;dgExport.AllowPaging = false;dgExport.DataBind();dgExport.RenderControl(htmlWriter);curContext.Response.Write(strWriter.ToString());curContext.Response.End();}}

ToDataTableClass类

        public static class ToDataTableClass{////// Convert a List{T} to a DataTable.///public static DataTable ToDataTable(List items){var tb = new DataTable(typeof(T).Name);PropertyInfo[] props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);foreach (PropertyInfo prop in props){Type t = GetCoreType(prop.PropertyType);tb.Columns.Add(prop.Name, t);}foreach (T item in items){var values = new object[props.Length];for (int i = 0; i < props.Length; i++){values[i] = props[i].GetValue(item, null);}tb.Rows.Add(values);}return tb;}////// Determine of specified type is nullable///public static bool IsNullable(Type t){return !t.IsValueType || (t.IsGenericType && t.GetGenericTypeDefinition() == typeof(Nullable<>));}////// Return underlying type if type is Nullable otherwise return the type///public static Type GetCoreType(Type t){if (t != null && IsNullable(t)){if (!t.IsValueType){return t;}else{return Nullable.GetUnderlyingType(t);}}else{return t;}}}

controller：

        public ActionResult GetData(string keyValue,string filename){System.Data.DataTable __dtData = _userExamApp.GetData(keyValue);ExcelHelper.DataTable3Excel(__dtData, filename + "的试卷记录");}

app:

        public DataTable GetData(string keyValue){DataTable __mydt = ToDataTableClass.ToDataTable(Get(keyValue));__mydt.Columns.Remove("A1");__mydt.Columns.Remove("A2");__mydt.Columns["A3"].ColumnName = "A3Name";__mydt.Columns["A4"].ColumnName = "A4Name"; 9 return __mydt;}

我会经常修改 不希望被转载！