我喜欢使用数据列表来显示用户名和注释以及用户名下面每个注释的附加内容.我有一个用户控件ReviewList来显示注释efiles.但我在这一行中有错误(s.tblDraft.Comments).我有错误:
The non-generic type 'System.Collections.IEnumerable' cannot be used with type arguments
请帮忙解决问题.
private void Displayuser()
{
var reviews =
(from s in _DataContext.tblSends
from u in _DataContext.Users
where (s.DraftId == _Draftid) && (s.ToEmailId == u.ID)
orderby u.Name
select new
{
userid = u.ID,
username = u.Name,
comments =s.tblDraft.Comments,
w = s.tblDraft.Comments.SelectMany(q => q.CommentAttaches)
}).Distinct();
DataList1.DataSource = reviews;
DataList1.DataBind();
var theReview = reviews.Single();
DisplayReviews(theReview.comments, theReview.w);
}
private void DisplayReviews(IEnumerable<Comment> comments,
IEnumerable<CommentAttach> w)
{
ReviewList reviewList = (ReviewList)DataList1.FindControl("ReviewList1"); …我有一个表格,显示每个"AREA"的"DONE"和"REMAIN",如下所示:
AREA DONE REMAIN TOTAL
AREA1 100 200 300
AREA2 200 300 500
AREA3 200 700 900
现在我想用饼图在每个区域制作一个显示"DONE"和"REMAIN"的报告,现在我有问题如何为图表做这个工作,应该如何成为图表控件的"行源".这张桌子需要什么查询？
当我按下以下代码的按钮时,我喜欢制作excel文件,但我有2个错误.
Error 1: The type or namespace name 'ExcelPackage' could not be found
Error 2: var ds = query.CopyToDataTable();
按钮点击事件的代码如下:
using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.OleDb;
using Microsoft.Office.Interop.Excel;
using Microsoft.Office.Core;
using System.Reflection;
using System.ComponentModel;
using System.Collections.Generic;
using System.Data.Linq;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected …