大约有 15,640 项符合查询结果（耗时：0.0202秒） [XML]
ViewBag, ViewData and TempData
...uires typecasting for complex data type and check for
null values to avoid error.
ViewBag doesn’t require typecasting for complex data type.
ViewBag & ViewData Example:
public ActionResult Index()
{
ViewBag.Name = "Monjurul Habib";
return View();
}
public ActionResult Index()
{
...
JNI converting jstring to char *
...g
env->ReleaseStringUTFChars(javaString, nativeString);
Can fix this errors:
1.error: base operand of '->' has non-pointer type 'JNIEnv {aka _JNIEnv}'
2.error: no matching function for call to '_JNIEnv::GetStringUTFChars(JNIEnv*&, _jstring*&, bool)'
3.error: no matching function ...
Insert, on duplicate update in PostgreSQL?
...ubject to race conditions that mean it might still fail with duplicate key error if a row is inserted concurrently, or might terminate with no row inserted when a row is deleted concurrently. A SERIALIZABLE transaction on PostgreSQL 9.1 or higher will handle it reliably at the cost of a very high se...
“ImportError: No module named” when trying to run Python script
...cript that launches, amongst other things, a python script. I get a ImportError: No module named ..., however, if I launch ipython and import the same module in the same way through the interpreter, the module is accepted.
...
YouTube iframe API: how do I control an iframe player that's already in the HTML?
...doesn't work!
A: "Doesn't work" is not a clear description. Do you get any error messages? Please show the relevant code.
Q: playVideo does not play the video.
A: Playback requires user interaction, and the presence of allow="autoplay" on the iframe. See https://developers.google.com/web/updates/20...
Possible heap pollution via varargs parameter
...ssign incorrect values into the list and the compiler will not trigger any error. For example, if T is a String then the following code will compile without error but will fail at runtime:
// First, strip away the array type (arrays allow this kind of upcasting)
Object[] objectArray = bar;
// Next...
How to use a WSDL
...ste into the address bar. Then fire the Arrow (go button).
If there is an error trying to load the file, then there must be a broken and unresolved url the file needs to resolve as shown below:
Refer to this answer for information on how to fix:
Stackoverflow answer to: Unable to create service ...
What does rake db:test:prepare actually do?
...epare is a good solution for PG issues like this.
“PG::UndefinedTable: ERROR: relation does not exist” with a correct Rails naming and convention" where I couldn't just execute rake db:migrate RAILS_ENV=production
When, for example you can't create test database for a bug discussed here: "PG ...
In AngularJS, what's the difference between ng-pristine and ng-dirty?
...il.$pristine">
Email is virgine.
</div>
<div class="error" ng-show="myForm.email.$dirty">
E-mail is dirty
</div>
</form>
A field that has registred a single keydown event is no more virgin (no more pristine) and is therefore dirty for ever.
...
Registry Key '…' has value '1.7', but '1.6' is required. Java 1.7 is Installed and the Registry is P
...
Just had the similar error when installing java 8 (jdk & jre) on a system already running Java 7.
Error: Registry key 'Software\JavaSoft\Java Runtime
Environment'\CurrentVersion' has value '1.8', but '1.7' is required.
Error: could not find ...