大约有 44,000 项符合查询结果（耗时：0.0449秒） [XML]
What's the hardest or most misunderstood aspect of LINQ? [closed]
...string> { "Bob", "Alice", "Trent" };
var results = from s in items select s;
Console.WriteLine("Before add:");
foreach (var result in results)
{
Console.WriteLine(result);
}
items.Add("Mallory");
//
// Enumerating the results again will return the new ...
Database Design for Revisions?
...ke this...
CREATE VIEW EmployeeHistory
AS
, FirstName, , DepartmentId
SELECT EmployeeId, RevisionXML.value('(/employee/FirstName)[1]', 'varchar(50)') AS FirstName,
RevisionXML.value('(/employee/LastName)[1]', 'varchar(100)') AS LastName,
RevisionXML.value('(/employee/DepartmentId)[1]', 'i...
The ViewData item that has the key 'MY KEY' is of type 'System.String' but must be of type 'IEnumera
... same code used before, so repeat this:
var db = new DB();
IEnumerable<SelectListItem> basetypes = db.Basetypes.Select(
b => new SelectListItem { Value = b.basetype, Text = b.basetype });
ViewData["basetype"] = basetypes;
before the return View(meal) in the [HttpPost] method.
exactl...
How to set initial value and auto increment in MySQL?
...r) values("kowalski's nuclear reactor.");
Step 4, interpret the output:
select * from penguins
prints:
'1001', 'We need more power!'
'1002', 'Time to fire up'
'1003', 'kowalski\'s nuclear reactor'
share
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...
Update a record without first querying?
...his in EF Core, but the following ensures an UPDATE without having to do a SELECT (tested with EF Core 2 and JET on the .NET Framework 4.6.2):
Ensure your model does not have IsRequired properties
Then use the following template (in VB.NET):
Using dbContext = new MyContext()
Dim beweg...
Automatic Preferred Max Layout Width is not available on iOS versions prior to 8.0
... my steps below.
In xCode's Issue Navigator right click on the error and select "Reveal In Log". (Note: @Sam suggests below, look in xCode's report navigator. Also @Rivera notes in the comments that "As of Xcode 6.1.1, clicking on the warning will automatically open and highlight the conflicting l...
Alternate output format for psql
...e a table with columns c1 through cN . The columns are wide enough that selecting all columns causes a row of query results to wrap multiple times. Consequently, the output is hard to read.
...
Converting Go struct to JSON
...ventually it was determined that co opting the capitalization of the first char works best with fewest trade-offs. Before the Go1 release other schemes were tried and rejected.
– deft_code
Jun 2 '14 at 6:31
...
Securely storing environment variables in GAE with app.yaml
...set them. Here is how:
Go to https://console.cloud.google.com/datastore/
Select your project at the top of the page if it's not already selected.
In the Kind dropdown box, select Settings.
If you ran the code above, your keys will show up. They will all have the value NOT SET. Click each one and s...
jQuery: Selecting by class and input type
I would like to select a set of elements that are both of a certain input type (say, a checkbox) and have a certain class using jQuery. However, when I try the following:
...