tostring

问题 I have a custom business object which overloads the .ToString() function. It also implements IFormattable.ToString, so I can define my own custom formats. This approach seems to work everywhere in my app, except .rdlc reports. For example, I have a text field on a report with the following expression: =Fields!MyField.Value.ToString("lr") "lr" is a custom format I have created. When running the report I always get #Error as the output. I've placed breakpoints in my .ToString function and

问题 I have been trying to work this out all day. Basically I have made a for loop which adds entries into an arraylist. One of the entries is a "Colour" varible. I have used the random.nextInt to create new values for the red, green and blue parts of the colour constructor. I have also set a toString method so I can see the values going into the arraylist. Problem is: When printing out I get : java.awt.Color[r=248,g=103,b=53] and I understand why that is so, I'm just wondering how I can change

问题 I have a class in javascript which define the toString method,however when I want to print it in the page,it always print [object object] in IE(6-8). But it works in firefox or chrome(they all print 'kk' in the example below). I wonder why? This is the example code: function Person(name){ this.name=name; } Person.prototype.toString=function(){ return this.name; } var p=new Person('kk'); document.getElementById('dis').innerHTML=p.toString(); What is the problem? BTW,this is the code in my

问题 I have a simple enum: public enum MyEnum { [Description("Zero")] Zero, [Description("A positive number")] Positive, [Description("Any integer")] AnyInteger, [Description("A negative number")] Negative, [Description("Reserved number")] Reserved =2 } However, running the the following code: MyEnum temp=MyEnum.AnyInteger; string en=temp.ToString(); sets the en string to Reserved. Why does it happens? Is there is some other way to set the string to the used enum string (in this case AnyInteger)?

问题 In codeigniter Im trying to use this plugin which requires I implement a toString method in my models. My toString method simply does public function __toString() { return (string)$this->name; } On my local machine with php 5.3 everything works just fine but on the production server with php 5.1.6 it shows "Object id#48" where the value of the name property of that object should appear..... I found something about the problem here but I still dont understand... How can I fix this? 回答1:

问题 I have a BaseEntity class which is a superclass of all JPA entities in my application. @MappedSuperclass public abstract class BaseEntity implements Serializable { private static final long serialVersionUID = -3307436748176180347L; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "ID", nullable=false, updatable=false) protected long id; @Version @Column(name="VERSION", nullable=false, updatable=false, unique=false) protected long version; } Every JPA entity extends from

问题 I am using the toString method of ArrayList to store ArrayList data into a String. My question is, how do I go the other way? Is there an existing method that will parse the data in the String instance back into an ArrayList ? 回答1: The short answer is "No". There is no simple way to re-import an Object from a String, since certain type information is lost in the toString() serialization. However, for specific formats, and specific (known) types, you should be able to write code to parse a

问题 I have a database table where I store the height, width, state, et cetera, of windows. As identifier for the windows I use the full type name of form. It works well, but I discovered that some forms that are generic gets names which are incredibly long. The reason is that the generic type is listed with full assembly information. Is there a way to skip that? For example the full name of a regular form would look like this: Some.Name.Space.NameOfForm But the full name of a generic form looks

问题 Today I was reading Antonio's Blog about toString() performance and there is a paragraph: What used to be considered evil yesterday (“do not concatenate Strings with + !!!“), has become cool and efficient! Today the JVM compiles the + symbol into a string builder (in most cases) . So, do not hesitate, use it. Now I am confused, because he is saying Today the JVM compiles the + symbol into a string builder (in most cases) , but I have never heard or seen(code) anything like this before. Could

问题 I'm writing a method that prints every Object it get passed. This works fine by calling the Object.toString() method for the object but doesn't works for arrays. I can find out whether it is an Array with the Object.getClass().isArray() method, but I don't know how to cast it. int[] a; Integer[] b; Object aObject = a; Object bObject = b; // this wouldn't work System.out.println(Arrays.toString(aObject)); System.out.println(Arrays.toString(bObject)); 回答1: If you don't know the type you can