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Published on 2010-03-17T23:38:10Z
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2010/03/17
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Is there a way to make Linq to Entities map unrecognized methods/functions to MySql functions?
I want to add support to some functions like Convert.*
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I was told in L2S, the code for update and insert are the same,
db.InsertOnSubmit(row);
db.SubmitChanges();
and L2S will check to see if it is a insert or update and act approprately in the background.
Is that true?
How about L2E? I tested, looks like in L2E it is not like that. Maybe I did…
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I have four tables:
Users PrivilegeGroups rdPrivileges LinkPrivilege
----------- ---------------- --------------- ---------------
userId(pk) privilegeGroupId(pk) privilegeId(pk) privilegeId(pk, fk)
privilegeGroupId(fk) name …
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I am using .Net3.5. Just wondering my understanding about the insert, update, delete are correct when use L2E.
For insert, we need two statements:
context.AddObject("entityName", newRow);
context.SaveChanges();
For update, we only need one statement:
context.SaveChanges();
For delete, we need…
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I have following code to delete an user from database:
try
{
var user = from u in db.Users
where u.Username == username
select u;
if (user.Count() > 0)
{
db.DeleteObject(user…
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The following code will select a key/value table in the DB and will save the result to the cache:
using (var db = new TestEntities())
{
if(Cache["locName_" + inventoryLocationName] != null)
return Cache["locName_" + inventoryLocationName];
var location =
db.InventoryLocationsSet…
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I’ve run into the problem a few times now: How to pre-authenticate .NET WebRequest calls doing an HTTP call to the server – essentially send authentication credentials on the very first request instead of waiting for a server challenge first? At first glance this sound like it should be easy:…
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Man I can't believe this. I'm still mucking around with OFX servers and it drives me absolutely crazy how some these servers are just so unbelievably misconfigured. I've recently hit three different 3 major brokerages which fail HTTP validation with bad or corrupt certificates at least according to…
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The dynamic type in C# 4.0 is a welcome addition to the language. One thing I’ve been doing a lot with it is to remove explicit Reflection code that’s often necessary when you ‘dynamically’ need to walk and object hierarchy. In the past I’ve had a number of ReflectionUtils that used string based expressions…
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I’ve written quite a bit about Visual FoxPro interoperating with .NET in the past both for ASP.NET interacting with Visual FoxPro COM objects as well as Visual FoxPro calling into .NET code via COM Interop. COM Interop with Visual FoxPro has a number of problems but one of them at least got a lot…
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Here’s a nice and simple path utility that I’ve needed in a number of applications: I need to find a relative path based on a base path. So if I’m working in a folder called c:\temp\templates\ and I want to find a relative path for c:\temp\templates\subdir\test.txt I want to receive back subdir\test…
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