dynamic

问题 I'd like to display all roles from database as check-boxes and check the ones that the current user is already in. Question: How can I check the check-boxes where the user is already in that role. <?php // DB QUERY: get role names // ------------------------------------------------------------------ $get_roles = mysqli_query($conn, "SELECT RoleName FROM roles") or die($dataaccess_error); $get_user_in_roles = mysqli_query($conn, "SELECT RoleName FROM users_in_roles WHERE UserId = $user_id") or

问题 I want to generate a couple of checkboxes on an ASP .NET MVC page. How can I retrieve their data in a controller after posting the page? 回答1: Use the Request.Form collection: Request.Form["control-id"] or declare a FormsCollection parameter in your action method and use it to retrieve the value. 来源： https://stackoverflow.com/questions/661575/how-can-i-get-data-from-dynamic-generated-controls-in-asp-net-mvc

问题 I'm getting an error that I think is because I've made some kind of mistake in a refactoring, but I can't find documentation on when $this is bound, and my error could be explained by it being bound statically. Extra points (I can't actually give you extra points) for links to excellent documentation about this kind of thing in php. [Edit] The error that I'm getting is telling me that Subclass::$var doesn't exist when I do, for example, echo $this->var in a superclass. The $var exists in the

问题 I'm quite new to JSON, and am currently learning about (de)serialization. I'm retrieving a JSON string from a webpage and trying to deserialize it into an object. Problem is, the root json key is static, but the underlying keys are dynamic and I cannot anticipate them to deserialize. Here is a mini example of the string : {"daily":{"1337990400000":443447,"1338076800000":444693,"1338163200000":452282,"1338249600000":462189,"1338336000000":466626} For another JSON string in my application, I

问题 All the solutions I have seen online has calloc() function used twice, is it possible to do with only using it once? The below code is not printing the correct array elements int **ptr; //To allocate the memory ptr=(int **)calloc(n,sizeof(int)*m); printf("\nEnter the elments: "); //To access the memory for(i=0;i<n;i++) { for(j=0;j<m;j++) { scanf("%d",ptr[i][j]); } } 回答1: Since C99 you can use pointers to VLAs (Variable Length Arrays): int n, m; scanf("%d %d", &n, &m); int (*ptr)[m] = malloc

问题 Just to begin I know there are a couple similarly-titled questions on here, but none are explained quite this way nor is the problem scope the same. I want to add nested dictionary entries dynamically. The use case is thus: I have a python script that is monitoring the network. A dictionary is created for each observed IP protocol (tcp, udp, icmp) that is observed. Then a sub-dictionary is created with a key that is the destination port (if one exists) for each of these IP protocols (80, 443,

问题 I'm adding new rows dynamically to the existing table, the first column of the table holds the Edit & Delete buttons. I'm facing 2 problems with this: Not able to Edit and Delete newly added rows, tried .live but couldn't make it work Not able to get the record id of the newly added rows (ajax returns the record when new rows are added). Code looks like this: Adding new rows: <script type="text/javascript"> $(function() { $('#btnSubmit').click(function() { var oEmployee = new Object();

问题 I'm searching the internet now for quite some time to find a proper solution but I was not successful so far. What I try to achieve: I create a dynamic drop down box with provinces. As soon as the user selects one of the dynamic created entries, a second dynamic drop down box for districts should only display the proper entries depending on the selected province. Therefor I have build the following code: search.php //$i is running up to the max amount of provinces //for each province there

问题 Im attempting to alter the search options in a Ext.view.MultiSelector component based on a drop down selection, however whatever I try to do to update the search options is not reflected in the UI. Below is a basic example of what I'm trying to do. I'm not sure if there is a function I'm not calling, or if the search options are just never re-loaded from the store once the element is drawn to the canvas? this.multiSelectorObj = Ext.create('Ext.view.MultiSelector', { valueField: 'id',

问题 I have research about an issue and could not find a solution for it through normal JavaScript techniques (maybe there is but I did not find any). The thing is, my application loads ( inserts) JavaScript files whenever the user loads a section of the system. The problem comes when I try to unload ( removal) one. I've noticed that if I load section A (which loads script A'), then load section B (which loads script B'), and then load section A again, the code in script A' does not run again,