大约有 40,000 项符合查询结果（耗时：0.0284秒） [XML]
Returning IEnumerable vs. IQueryable
...mers = custs.Where(c => c.IsGold);
That code will execute SQL to only select gold customers. The following code, on the other hand, will execute the original query in the database, then filtering out the non-gold customers in the memory:
IEnumerable<Customer> custs = ...;
// Later on...
...
More elegant “ps aux | grep -v grep”
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@kxsong: | grep '[t]erminal' selects any line containing the word 'terminal' without putting the word 'terminal' into the process list. What are you trying to achieve with | grep '[r]oot' and how is it not working? There is likely to be a better solution...
Razor MVC Populating Javascript array with Model Array
....SerializeObject(ViewBag.ComputeOfferings))),
desktopGrpComputeOfferingSelected: ko.observable(),
};
ko.applyBindings(desktopGrpViewModel);
...
<select name="ComputeOffering" class="form-control valid" id="ComputeOffering" data-val="true"
data-bind="options: availableComputeOffering,
...
Entity Framework: There is already an open DataReader associated with this Command
...al commands executed on single connection (or single command with multiple selects) while next DataReader is executed before first one has completed the reading. The only way to avoid the exception is to allow multiple nested DataReaders = turn on MultipleActiveResultSets. Another scenario when this...
how to put focus on TextBox when the form load?
...
You could try:
MyTextBox.Select();
According to the documentation:
The Select method activates the control if the control's Selectable
style bit is set to true in ControlStyles, it is contained in another
control, and all its parent controls...
How to connect to LocalDB in Visual Studio Server Explorer?
...11.0
Copy the Instance pipe name that starts with np:\...
In Visual Studio select TOOLS > Connect to Database...
For Server Name enter (localdb)\v11.0. If it didn't work, use the Instance pipe name that you copied earlier. You can also use this to connect with SQL Management Studio.
Select the da...
How do I show the schema of a table in a MySQL database?
...rpreted the first way. For anybody reading the question the other way try
SELECT `table_schema`
FROM `information_schema`.`tables`
WHERE `table_name` = 'whatever';
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HTTPS with Visual Studio's built-in ASP.NET Development Server
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Select the project-file in the Solution Explorer: for example: "WebApplication1".
With pressing ALT+ENTER you enter the project-properties.
Select "DEBUG" on the left side.
Here you can select "Enable SSL".
Then you can...
Is there a way to get a collection of all the Models in your Rails app?
....
EDIT: Just for fun, I found a way to list all classes
Module.constants.select { |c| (eval c).is_a? Class }
EDIT: Finally succeeded in listing all models without looking at directories
Module.constants.select do |constant_name|
constant = eval constant_name
if not constant.nil? and constan...
Extract elements of list at odd positions
...he first element (at position 0, because the indexes are 0-based) would be selected. In this case the second element will be selected.
Because the second element is omitted, the default is being used (the end of the list). So the list is being iterated from the second element to the end.
We also p...