Use list in where condition in entity framework

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How can I use list in where clues in Entity Framework that list contain my searching value.

List<String> Search_option= new List<string>();
Search_option.add("a");
Search_option.add("b");

var Data= from a in Db_table select a;

And I also use this code too:

var Data= from a in Db_table where(Search_option.contains(a.Field.Tostring())) select a;

Thanks

Posted 8-Feb-12 3:43am

raviprajapat

Updated 8-Feb-12 5:49am

Shahin Khorshidnia

v3

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BobJanova 8-Feb-12 11:24am

What's the question? Does your second code sample not work?

2 solutions

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Herman<T>.Instance · Answer 1 · 2012-02-08T04:11:00

Solution 1

you can use LINQ for searching in a LIST<> object
like
Search_option.Any(x => x.value == "a")

Posted 8-Feb-12 4:11am

Herman<T>.Instance

zyck · Answer 2 · 2012-02-08T04:22:00

I Suggest you can use DropdownList for your Parameters

markup in line
-----------

ASP.NET

<asp:dropdownlist id="ddlSearchOption" runat="server">
 <asp:listitem text="-- Select One --" value="" selected="True"></asp:listitem>
 <asp:listitem text="A" value="A"></asp:listitem>
 <asp:listitem text="B" value="B"></asp:listitem>
</asp:dropdownlist>

Code Behind
-----------

C#

var Data = from a in Db_table
           where a.fieldName == this.ddlSearchOption.SelectedValue
           select a;

HTML

Other Option

C#

var Data = Db_table.Where(a => a.fieldName.Contains(this.ddlSearchOption.SelectedValue).ToList();

Hope this will help you
don't forget to vote
thanks