Error selecting from large data table causing time out in EF + code first

问题

I am using EF code first model to get the data from data base table in which i have 400,000 records.

But when i use the LINQ query something like:

var urer = context.UserEntity.Where(c => c.FirstName.Contains('s'));

The above statement gives me all the user to whose first name contains 's'. But since this is a huge data base table, it is giving me the following error:

An existing connection was forcibly closed by the remote host

Please suggest me the best way to do it. I am assigning this data to gridview. I am thinking to get the first 500 each time. Is there any way to do it from EF side, so that i won't need to do it in sql.

Thanks

回答1:

1.add index on your column
2. increase timeout connection
You can create Store procedure USE LINQ call Store procedure

LINQ to SQL (Part 6 - Retrieving Data Using Stored Procedures)
http://weblogs.asp.net/scottgu/archive/2007/08/16/linq-to-sql-part-6-retrieving-data-using-stored-procedures.aspx

See this answer as well Calling a SQL Server stored procedure with linq service through c#

回答2:

1. Get rid of EF

2. set key in web.config common key for timeout replace 600

   try
   {
    conn.Open();
    mySqlCommand.Connection = conn;
     mySqlCommand.CommandTimeout=600;
   

来源：https://stackoverflow.com/questions/20479792/error-selecting-from-large-data-table-causing-time-out-in-ef-code-first