c# - Select Max, but only on numeric values with LINQ to Entities -


I am trying to select the maximum sys_id from a table where sys_id < / Code> column is a varchar type. Some lines are text, but I am only concerned with numerical values.

I have tried the following bit code, but they do not work - the LINQ does not seem to support the operation of the units. / P> 

  public string GetSysID () {(var reference = new DbEntities ()) {int i; // var intQuery = context.myTable.Where (t = & gt; int.TryParse (t.sys_id, outside i)). Maximum (); Int intQuery = Convert.ToInt32 (context.myTable.Where (P => IsNumber (p.sys_id). Max (P => p.sys_id)); // return reference.drawings.max (p = & gt; p.sys_id); Return intQuery.ToString (); }} Public Static Bull ID (string value) {int n; Return int.TryParse (value, out N); }

Is there any way to use LINQs to do entities?

use SqlFunctions.IsNumeric and Cast 

  iQueryableSource. Details about where (see X => SqlFunctions.IsNumeric (x.Number + ".0e0") == 1) // Down 0e0 Select (x = & gt; x.Number) .Cast & lt; Int & gt; () .max ()

UPDATE

You can search for a problem with a point or currency sign in a string , But still receiving ISNumeric == 1 . Because you want only integer, you should add .0e0 as the string

< P> View Details and Details


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