Environment:
Background: the stored procedure is in the EDMX. My stored procedure sets the return value to 0 if nothing happened, 1 if something affected and value of @@ERROR if errors.
BACKGROUND 1: my stored procedure, LTM_Lease_DeleteSubFiles
, does SET NOCOUNT ON
at the top and sets return value with RETURN
command at the end of the stored procedure.
PROBLEM 1: my call returns -1 which is not even in the stored procedure:
var spResults = context.LTM_Lease_DeleteSubFiles(...)
BACKGROUND 2: my stored procedure DOIOwnerChanges_Apply
sets return value with RETURN
command at the end of the stored procedure.
PROBLEM 2: my call returns the value of 8 which is not even found in the stored procedure:
var spResults = context.DOIOwnerChanges_Apply(...)
Use the following steps to solve this issue:
Add -> Function Import
.Search_Products
, choose your procedure from the drop down list, and choose the return value of the procedure to be Entities
and choose Products
from the drop down list.Then in the code behind:
var db = new MyEntities();
var TEST_SEARCH_TERM = "product";
var result = db.Search_Products(TEST_SEARCH_TERM);//Search_Products is the name that you specified in Function Import dialog
MyGridView.DataSource = result;
MyGridView.DataBind();
The reason that you get -1
for result is that Entity Framework cannot support Stored Procedure Return values out of the box. I think support of stored procedure return values depends on version of Entity framework. Also Entity Framework doesn't have rich stored procedure support because its an ORM, not a SQL replacement.
I have come across this before with stored procedures using dynamic SQL. I have had success using complex types if I add the line 'SET FMTONLY OFF;' (see https://msdn.microsoft.com/en-us/library/ms173839.aspx) to the top of my stored procedure before it is added to the EF model. Once you have your model setup with your complex type, be sure to remove this line.
Example:
ALTER PROCEDURE dbo.SearchProducts
@SearchTerm VARCHAR(max)
AS
BEGIN
SET FMTONLY OFF;
DECLARE @query VARCHAR(max)
SET @query = 'SELECT * FROM dbo.Products WHERE Name LIKE ''%' + @SearchTerm + '%'''
EXEC(@query)
END