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问题 I have the following code in my action: ViewBag.AccountId = new SelectList(_reference.Get("01") .AsEnumerable() .OrderBy(o => o.Order), "RowKey", "Value", "00"); and in my view: @Html.DropDownList("AccountID", null, new { id = "AccountID" }) Now I would like to create the list dynamically so in my action I would just like to hardcode a simple SelectList with the values: 00 and "" so that when I go to my view I see just a blank select box. Can someone explain how I can do this in C#. 回答1: In

问题 I've created a Sankey diagram in R, using the networkD3 package, that I'd like to save as a static image, using code instead of clicking on 'Export' --> 'Save as Image...'. The current code I've tried (using this Sankey diagram as an example) is: library(networkD3) URL <- paste0( "https://cdn.rawgit.com/christophergandrud/networkD3/", "master/JSONdata/energy.json") Energy <- jsonlite::fromJSON(URL) # Plot jpeg( filename = "Sankey.jpg", width = 4000, height = 4000) sankeyNetwork(Links = Energy

问题 I'm writing a Java desktop client which will send multiple files over the wire to a servlet using a post request. In the servlet I'm getting the input stream from the request to receive the files. The servlet will write the files to disk, one by one as they're read from the stream. The implementation has a couple of requirements: Only one HTTP request must be used to the server (so only a single stream) The servlet must use a reasonable fixed amount of memory, no matter what the size of the

问题 I'm writing a Java desktop client which will send multiple files over the wire to a servlet using a post request. In the servlet I'm getting the input stream from the request to receive the files. The servlet will write the files to disk, one by one as they're read from the stream. The implementation has a couple of requirements: Only one HTTP request must be used to the server (so only a single stream) The servlet must use a reasonable fixed amount of memory, no matter what the size of the

问题 I want to execute two scripts before every test method, but i also want to define some scripts to execute before specific methods. Using Spring framework and @Sql annotations, is it possible? @RunWith(SpringJUnit4ClassRunner.class) @ContextConfiguration("/WEB-INF/application-context.xml") @DirtiesContext(classMode = ClassMode.BEFORE_EACH_TEST_METHOD) @Sql({ "/database/drop_schema.sql", "/database/create_schema.sql" }) public class CentralServiceTestCase { // I want to run "drop_schema.sql",

问题 Is it possible to add a tool bar inside QWidget that is placed inside a tab (in QTabWidget ) ? The idea is to put a separate tool bar for each tab. It seems that tool bars can only be placed inside QMainWindow . 回答1: QToolBar is an ordinary QWidget , you can add it to a layout. 来源： https://stackoverflow.com/questions/5227889/toolbars-inside-tabs

问题 Is it possible to add a tool bar inside QWidget that is placed inside a tab (in QTabWidget ) ? The idea is to put a separate tool bar for each tab. It seems that tool bars can only be placed inside QMainWindow . 回答1: QToolBar is an ordinary QWidget , you can add it to a layout. 来源： https://stackoverflow.com/questions/5227889/toolbars-inside-tabs

问题 The bounty expires in 18 hours . Answers to this question are eligible for a +500 reputation bounty. lf215 wants to draw more attention to this question. How can I find a domain whose root certificate is AAACertificateServices? Note this is a Comodo certificate. To prepare for a dependent server whose certificate will change soon, it looks my clients do have this certificate. However, I'd like to verify that my clients will work now by sending a request to a domain that is already using

问题 If I do args.svc_name, I was expecting equivalent to args.option1, because the svc_name's value is option1. But i got error for "'Namespace' object has no attribute 'svc_name's'" parser = argparse.ArgumentParser(prog=None,description="test") parser.add_argument("--option1", nargs="?",help="option") args = parser.parse_args() svc_name = "option1" print (args.svc_name) Can someone help me out? 回答1: The ArgumentParser class exposes the keys as direct attributes rather than a mapping, so to get

问题 I am working on writing automation tests for a custom web application. I am running into a problem where I can't change the text of a span. I have tried using driver.execute_script but have had no luck. (It would really help if I knew javascript better) As far as I know you can't click a span and the list is populated as a list of . What is the best way to change this text? 回答1: You need to set the innerHTML using execute_script(): driver.execute_script('arguments[0].innerHTML = "New value";'