Linq To Entity - Filter Relational As Well

I have 2 tables. Table 1 and Table 2. They have one to many relation. I'm trying to do a query like below. It works fine with finding the result. I mean if it cannot find any result according to the params i got null value as usual. However it brings all Table 2 results all the time in Table 1 class and I do want to get only Table 2 results according to the query.

dc.Table1s.SingleOrDefault(t1 => t1.SearchField1 == param1 
                           && t1.Table2s.Any(t2 => t2.SearchField2 == param2 
        开发者_Python百科                                  && t2.SearchField3 == param3));

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UPDATE @6/8/2011 Can you try this so that you get Filtered Table2s in Table1

var result = from  t1 in Table1s
             where t1.key == t2.key && t1.SearchField1 == param1
             select new Table1s //creating new Table1s Object with Filtered Table2s values
                    {
                        key = t1.key,
                        SearchField1 = t1.SearchField1
                        //set all other Table1s propeties from t1
                        ...
                        Table2s = t1.Table2s.Where( x=> x.SearchField2 == param2 && x.SearchField3 == param3)
                    };


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Since you are checking for "Any", you are just getting Table1 Entity which matches your condition. Table1s.Table2s gives you all related entries. You need to Filter it again

dc.Table1s.SingleOrDefault(t1 => t1.SearchField1 == param1 
                           && t1.Table2s.Any(t2 => t2.SearchField2 == param2 
                                          && t2.SearchField3 == param3));

while you need to fetch Table2s for Table1 matching your search condition,

var table2s = table1.Table2s.Where(t2 => t2.SearchField2 == param2 && t2.SearchField3 == param3);

if you directly need Table2s, you can do:

var result = from t1 in Table1s
             from t2 in Table2s
             where t1.key == t2.key && t1.SearchField1 == param1
                                    && t2.SearchField2 == param2 
                                    && t2.SearchField3 == param3
             select t2;