How to get records by passing multiple column names dynamically in ASP.NET MVC5

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by passing single column name binding records but i want to get records by passing multiple column names dynamically using entity framework

What I have tried:

public List<string> GetRecords(List<string> Columns,string tablename)
    {
        using (var Context = new MCPEntities())
        {
             string columnnames = string.Join(",", Columns);
            var Records = Context.Database.SqlQuery<string>("SELECT " + columnnames + " FROM " + tablename + " ").ToList();
            return Records.ToList();
        }
    }

Posted 16-Jun-17 21:13pm

VenkataSeshu B

Updated 18-Jun-17 22:31pm

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Ehsan Sajjad 17-Jun-17 13:32pm

so the above does not works? any errors/exceptions ?

VenkataSeshu B 19-Jun-17 1:35am

Getting this error..
"The data reader has more than one field. Multiple fields are not valid for EDM primitive or enumeration types."

1 solution

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F-ES Sitecore · Answer 1 · 2017-06-18T22:31:00

Solution 1

The data reader has more than one field. Multiple fields are not valid for EDM primitive or enumeration types - Google Search[^]

Please do basic research before asking a question.

Posted 18-Jun-17 22:31pm

F-ES Sitecore

Comments

VenkataSeshu B 19-Jun-17 5:11am

searched but did not get exact soultion

F-ES Sitecore 19-Jun-17 5:21am

No-one else has your table so you're not going to get an "exact solution". However the first page of results have questions identical to yours only with different table names and column structures. Read the solutions to understand what the problem is and what is needed to fix it, then adapt that solution to your specific table.

VenkataSeshu B 19-Jun-17 5:27am

if i pass single column name , table name means binding
But problem is by passing muliple columns,table name not binding records

F-ES Sitecore 19-Jun-17 5:31am

Yes because this

Context.Database.SqlQuery<string>

is telling .net that it expects a string to be returned from the query and to store that string in "Records". When you have one column being returned that works fine. If you have two columns then you have two pieces of data, so how can you map two pieces of data (say an ID and a Name) to a single string? You need to change the return type (<string>) to something appropriate to the data being returned.