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我想打印一个按测量属性排序的测量列表（afmetingen），你可以用（toestel）测量它。所以我使用组加入来查找所有正确的测量，并将其放在测量属性组中。现在第一页没问题，但是当我来到页面末尾时（没有足够的空间）我检测到它并且不打印其余部分。

所以我将 ev.getmorepages 设置为 true，以便它在第二页重新开始。但我不必打印前 10 个测量值。如何跳过前 10 次测量？

跳过选项不起作用...

现在有没有办法从测量列表中的某个索引开始？跳过它的前 10 个。

private void pd_PrintPageV2(object sender, PrintPageEventArgs ev)
    {
                    var afmetinger =
                       from selectoestel in toestel
                       orderby selectoestel.Volgnr
                       where selectoestel.IDnumber >= meettoestel 
                       join metinger in tempmeetrapport.afmetingen on selectoestel.IDnumber equals metinger.meettoestel into metinggroup
                       select new
                        {
                            //select toestel naam
                            toestel = selectoestel.naam,
                            volgnr = selectoestel.IDnumber,
                            //select de volledig afmeting
                            afmetingers = from prod2 in metinggroup
                                          orderby prod2.nummer
                                          select prod2
                        };

         int i = 0;

         //code to print the measurement attribute on the page (deleted (to long))

         //start printing all measurements row by row
         foreach (var productGroup in afmetinger)
         {
             foreach (var prodItem in productGroup.afmetingers)
             {
                if(i < 10){ print something on page }
                i++

             }
            }

         // If more lines exist, print another page.
         if (i>10)
         {
             ev.HasMorePages = true;
         }    }
4

1 回答 1

2

You can select all items to a single list and use LINQ's Skip method:

var allItems = afmetinger.SelectMany(x => x.afmetingers);
foreach (var prodItem in allItems.Skip(numberOfItemsToSkip))

Also, if you always want to display just 10 items, you can combine it with Take:

foreach (var prodItem in allItems.Skip(numberOfItemsToSkip).Take(10))
于 2013-05-25T18:02:35.327 回答