C＃中的datalist天搜索问题 [英] datalist days search problem in C#

问题描述

大家好，



实际上我在搜索引擎的位置，技能，功能区和行业中都有4个搜索栏，这个搜索引出了数据列表，其中包含一些详细信息约会。



现在我必须从该数据列表中下载60天和30天的新数据过滤器。



所以我用这个代码

Hi all,

Actually I have 4 search bar in search engine location, skills, functional area and industry and this search leads to datalist with some detail with posted date.

now i have to dropdown with 60 days and 30days fresh data filter from that datalist.

so i used this code

 if (ddfreshness.SelectedItem.ToString() == "Any")
        {
            BindDataList();
        }
        else if (ddfreshness.SelectedItem.ToString() == "30 Days")
        {
            foreach (DataListItem dli in DataList1.Items)
            {
//fetching posted date from datalist
                Label l45 = (Label)dli.FindControl("lblprloc2");

                DateTime now = DateTime.Today;
                TimeSpan ts = now - Convert.ToDateTime(l45.Text);
                // Difference in days.

                int differenceInDays = ts.Days;
                string date = Convert.ToString(differenceInDays) + " Days";
               
                if (differenceInDays <= 30)
                {
                   
//bind fuction for the data to same datalist
                    BindDataList();
                    
                }
            }
        }

Collection was modified; enumeration operation may not execute

请帮我这个代码。

plz help me for this code.

推荐答案

你不能重新绑定当天数据列表中项目列表中的foreach循环中的列表！

对于与foreach一起使用的任何集合，您不能这样做 - 它会更改项目的数量或顺序循环试图迭代。



在循环外移动BindDataList调用。

You cannot rebind the day a list within a foreach loop on the list of items in the datalist!
You can't do that with any collection that is being used with a foreach - it changes the number or order of the items that the loop is trying to iterate through.

Move the BindDataList call outside the loop.

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