readonly

问题 I am wondering if is there a way to make a table writable only by an specific trigger in SQL Server or Oracle DB. Just to make an example: Table: "Operation" ID | Date | Account1_ID | Account2_ID | Amount Table: "Transactions" ID | Date | Account | Debt | Credit What I want to ensure is that the Transactions table only receive data from a trigger in the Operation table. Is there a way to achieve that? 回答1: Execute As allows you to create a trigger that runs as a user different to the current

问题 Consider the following classes: public abstract class Token { private List<Token> _Tokens { get; set; } // ReadOnly public is mandatory. How to give protected add-only, index-based access? public ReadOnlyCollection<Token> Tokens { get { return (this._Tokens.AsReadOnly()); } } // AddOnly for derived classes. protected Token AddToken (Token token) { this._Tokens.Add(token); return (token); } } public class ParenthesesToken: Token { // This method is called frequently from public code. public

问题 I run ng build --prod in my project. That I found is this error: src\app\components\xxxx\xxxx.component.html(116,100): : Cannot assign to 'total' because it is a constant or a read-only property. In this line I have this code: <input formControlName="total" id="total" type="text" class="validate" [(ngModel)]="total"> I used [(ngModel)]="total" --> because I want the value to be saved even without modifying it. If I used [value]="total" this error doesn't exist, but my value doesn't saved If I

问题 I can't figure out how to tell C that I want a pointer that will not move. It will always point to the same array. That said, the array members are not constant, but the array itself is global and so, it is at a fixed position. So, when I code this: #include <stdio.h> int v[2]={0, 1}; const int *cpv=v; int main(void) { v[1]=2; printf("%d\n", v[1]); *(cpv+1)=3; printf("%d\n", v[1]); cpv[1]=4; printf("%d\n", v[1]); } And get this errors: constp.c: In function ‘main’: constp.c:9: error:

问题 GWT's RichTextArea doesn't have a method to make it "ReadOnly". There's a setEnabled() method, but if you call setEnabled(false), it doesn't work. I'm trying a workaround for this that should work. My idea is to replace the RichTextArea for this behavior with a HTML widget. The problem is, if I use an HTML widget to set the original RichTextArea's content, it will be affected by all the styling of my web application. The RichTextArea achieves this wrapping the content inside an IFrame. So i'm

问题 This is my code inside document.ready: var $inputs = mySelectors(); $inputs.each(function() { $(this).attr("readonly", "true"); }); This code works for IE8, but not for FF3.5 IE output(as seen with IE Developer toolbar) <input type="text" readOnly="readonly"..../> FF output (seen with Firebug) <input type="text" readonly=""> What is the right way to set it ? $elem.attr("readonly","true"); or $elem.attr("readonly","readonly"); or $elem.attr("readOnly","readonly"); //note the uppercase O in

问题 I cannot seem to get a definite feedback on whether or not a read-only workbook is opened or not. In my code I have it copy after closing/saving the workbook. I would like to be able to overwrite the read-only workbook if it's opened as read-only by another user. I tried this something like this bit of code, but had no luck, it just kept saying "File not open!" even when I had it opened. How can I check whether or not a "read-only .xlsx" file is opened or not in vba? Sub Test_If_File_Is_Open

问题 How to make checkbox/combobox readonly in javaFX but not disabled. I tried consuming onAction event but it didn't work. checkBox.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { event.consume(); } }); Consuming all events like in code below works but I don't think it's a good solution: checkBox.addEventFilter(KeyEvent.ANY, new EventHandler<KeyEvent>() { @Override public void handle(KeyEvent event) { event.consume(); } }); checkBox.addEventFilter

问题 I need a field that can be assigned to from where ever I want, but it should be possible to assign it only once (so subsequent assignments should be ignored). How can I do this? 回答1: That would not be a readonly field then. Your only options for initializing real readonly fields are field initializer and constructor. You could however implement a kind of readonly functionality using properties. Make your field as properties. Implement a "freeze instance" method that flipped a flag stating

问题 My Android was working perfectly and was able to add a new xml,activity or any new file to my project. Until recently, it gives an error whenever I add a new class or any new file. It always says: Unable to parse template "Class" Error message: Cannot modify a read-only directory 'C:\Users\jay\Desktop\CurLoc\app\src\main\java\com\example\jay\curloc'. I already tried to change the attribute of the folder where my project is located by unchecking Read-Only box in the Properties. I also restart