我想做很简单的事情,但我不成功.我的asp.net页面上有按钮和标签,我想在点击按钮后获得标签文本.这是我的代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="DynamicWebApplication.WebForm2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script type="text/javascript">
function f()
{
var g = $('<%=Label1.ClientID%>').val(); // Also I tried .text() and .html()
alert(g);
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>
<p></p>
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="f();"/>
</div>
</form>
</body>
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我想在点击按钮后用jQuery设置文本标签.我编写代码并且它有效,但在我在标签中设置文本后,标签返回其旧状态.这是我的代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="WebForm2.aspx.cs" Inherits="DynamicWebApplication.WebForm2" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<script src="Scripts/jquery-1.4.1.min.js" type="text/javascript"></script>
<script type="text/javascript">
function f()
{
$('#<%=Label1.ClientID%>').html("hello");
}
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Label ID="Label1" runat="server"></asp:Label>
<p></p>
<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="f();"/>
</div>
</form>
</body>
</html>
Run Code Online (Sandbox Code Playgroud) 我在纱线集群中运行我的火花应用程序.在我的代码中,我使用数量可用的队列核心来创建我的数据集上的分区:
Dataset ds = ...
ds.coalesce(config.getNumberOfCores());
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我的问题:如何通过编程方式而不是配置来获取队列的可用数量?
我是OpenCV的新手.我知道存在许多方法来检测多边形的轮廓.但是当我尝试检测我绘制的多边形轮廓时,是否存在给我解决方案的方式?
PS抱歉我的英文...
我的代码:
Mat src = imread("C:/Users/Nickolay/Desktop/1.jpg");
resize(src, src, Size(400, 400), 0, 0, INTER_CUBIC);
if (src.empty())
{
cout << "Cannot load image!" << endl;
return -1;
}
//================================
Mat gray;
cvtColor(src, gray, CV_BGR2GRAY);
Mat bw;
Canny(gray, bw, 800, 850, 5, true);
imshow("canny", bw);
vector<vector<Point>> countours;
findContours(bw.clone(), countours, CV_RETR_CCOMP, CV_CHAIN_APPROX_SIMPLE);
vector<Point> approx;
Mat dst = src.clone();
for(int i = 0; i < countours.size(); i++)
{
approxPolyDP(Mat(countours[i]), approx, arcLength(Mat(countours[i]), true) * 0.01, true);
if (approx.size() >= 4 && (approx.size() <= 6))
{ …
Run Code Online (Sandbox Code Playgroud) 在这种情况下,如何找到最大的四边形?
在附图中,您可以看到我所拥有的(在左侧)和我想要的内容(在rigth中).
此代码不起作用,因为最大的矩形有十字而不是角.
int GameController::GetIndexOfExternalContour(vector<vector<Point>> contours)
{
int largest_area=0;
int largest_contour_index=0;
for( int i = 0; i< contours.size(); i++ ) // iterate through each contour.
{
double a = contourArea(contours[i], false); // Find the area of contour
if(a > largest_area)
{
largest_area = a;
largest_contour_index = i; //Store the index of largest contour
}
}
Run Code Online (Sandbox Code Playgroud) 我想使用 JSOUP 从文本中仅删除 html 标签。我使用了这里的解决方案(我之前关于 JSOUP 的问题)但经过一些检查后我发现 JSOUP 得到 JAVA 堆异常:大 html 的 OutOfMemoryError 但不是全部。例如,它在 html 2Mb 和 10000 行上失败。代码在最后一行抛出异常(不在 Jsoup.parse 上):
public String StripHtml(String html){
html = html.replace("<", "<").replace(">", ">");
String[] tags = getAllStandardHtmlTags;
Document thing = Jsoup.parse(html);
for (String tag : tags) {
for (Element elem : thing.getElementsByTag(tag)) {
elem.parent().insertChildren(elem.siblingIndex(),elem.childNodes());
elem.remove();
}
}
return thing.html();
}
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有办法解决吗?
我使用UsageStats
Android 的功能,但最小间隔是DAILY INTERVAL
.
long time = System.currentTimeMillis();
List<UsageStats> appList = manager.queryUsageStats(UsageStatsManager.INTERVAL_DAILY, time - DAY_IN_MILLI_SECONDS, time);
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我怎样才能进入UsageStats
每小时的间隔?
我正在尝试实施以下 AWS 文章中介绍的解决方案:
所以我做了接下来的步骤:
创建本地密钥库:
keystore winpty openssl pkcs12 -export -in eeb81a0eb6-certificate.pem.crt -inkey eeb81a0eb6-private.pem.key -name myname -out my.p12 -password pass:mypass
keytool -importkeystore -destkeystore mykeystore.jks -srckeystore my.p12 -srcstoretype PKCS12 -deststorepass mypass -srcstorepass mypass
创建本地信任库:
keytool -keystore my_ca.jks -alias myalias -import -file AmazonRootCA1.pem
我的代码:
public class AWSSessionCredentialsProviderImpl implements AWSSessionCredentialsProvider {
private static final Logger LOGGER = LogManager.getLogger(AWSSessionCredentialsProviderImpl.class.getName());
private final Gson gson = new Gson();
private SdkHttpClient client;
private HttpExecuteRequest request;
private String awsAccessKeyId;
private String awsSecretAccessKeyId; …
Run Code Online (Sandbox Code Playgroud) 如何在捕获图像后删除确认显示("保存"和"丢弃"按钮显示)?
我想在不改变应用程序功能的情况下删除第二步:在startActivityForResult
函数转到previewCapturedImage()
函数之后.
这是我的代码:
public class MainActivity extends Activity {
private static final int CAMERA_CAPTURE_IMAGE_REQUEST_CODE = 100;
public static final int MEDIA_TYPE_IMAGE = 1;
private static final String IMAGE_DIRECTORY_NAME = "OpenCV Demo";
private Uri fileUri;
private ImageView imgPreview;
private Button btnCapturePicture;
private FrameLayout frameLayout;
private TextView textView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_8, this, mOpenCVCallBack))
{
Log.e("TEST", "Cannot connect to OpenCV Manager");
}
setContentView(R.layout.activity_main);
}
private void captureImage() {
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); …
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