如何过滤数据表 [英] How to filter DataTable

问题描述

您好，先生/女士

我想过滤一个数据表.
为此，我以这种方式使用LINQ，它无法正常工作，并给出错误

Hello sir/madam

I would like to filter a datatable.
For that I am using LINQ in this way its not working its give an error

"The source contains no DataRows."

首先，我在数据表dt中得到一个值.
现在我正在使用LINQ

First i get a value in a datatable dt.
now i am using LINQ

var query = from r in dt.AsEnumerable()
               where r.Field<string>("AI_No_Of_Conception") == ""
                     select r;
       DataTable   dtLink=new DataTable();
               dtLink = query.CopyToDataTable();

如果还有其他选择如何在数据表上应用查询并将其绑定到另一个数据表，则建议使用my.

If any another option how to apply a query on datatable and bind it another Datatable then please suggest my.

推荐答案

嗨
试试吧，

Hi
Try this out,

var query = from r in dt.AsEnumerable() where 
String.Equals(r.Field<string>("AI_No_Of_Conception"),"")                             
select r;
// any one please suggest an idea to optimize the following two lines
if(result.Count() >0)// to avoid exception "The source contains no DataRows"
            dtLink = result.CopyToDataTable();

--SJ

--SJ

我前段时间也遇到了同样的问题，并发现根本原因很愚蠢，您需要像这样使用linq查询

I faced the same issue some time back and figured out that the rootcause is very silly you need to use linq query like this

var query = from r in dt.AsEnumerable()
where r.Field("AI_No_Of_Conception").ToString() == ""
select r;

只需使用Tostring()

just use Tostring()

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