Is there a way in C# to do this conversion and back? I have a WPF app which has a Image control. I'm trying to save the image in that control to a SQL Database. In my Entity Model, the datatype of the picture column in my database is a byte[]. So I found a method to convert a System.Drawing.Image to a byte[] and back. But I haven't ...
There are two classes: A and B. There are algorithms for converting from type A to type B and back. We cannot touch the source code of them. Can I write an implicit conversion between the two types? Example code which should work: B CalculateSomething(double x) { A a(x); a.DoSomethingComplicated(); return a; } ...
Hi, I'm just wondering if anyone knows the reason why you are not allowed to use interfaces with the implicit or explicit operators? E.g. this raises compile time error: public static explicit operator MyPlayer(IPlayer player) { ... } "user-defined conversions to or from an interface are not allowed" Thanks, ...
I ran into an interesting problem (hopefully, interesting not just for me :) I am running Entity Framework 1 (.NET 3.5) and ASP.NET MVC 2. I have a Customer class that has many-to-one relationship with Country class (in other words, Country is a lookup table for customers - I described more in this post: http://stackoverflow.com/questio...
Sorry, I'm new to flash I have this line of code: BaseEntry( _entryList[i] ).topTeamName = ((Team)(teamList.getNameAtIndex( i*2 ))).Name; and I get the error: TypeError: Error #1034: Type Coercion failed: cannot convert "[object Team]" to ncaa.Data.Team. What do I need to do to fix it? ...
I'm working with legacy Java code which returns java.lang.object. I'm passing it into a function and I'd like to do some implicit conversions as such: implicit def asInt( _in:Option[Object] ) = _in asInstanceOf[ Option[Int] ] implicit def asDouble( _in:Option[Object] = _in asInstanceOf[ Option[Double] ] private def parseEntry( _name:S...
I have a datagridview in which one column contains a custom class, which I have set using: dgvPeriods.Columns[1].ValueType = typeof(ExDateTime); It is rigged up to display correctly by handling the CellFormatting event, but I'm unsure what event to handle for cell editing. In the absence of doing anything I get a FormatException as th...
Hello I have written this code to convert string in such format "0(532) 222 22 22" to integer such as 05322222222 . class Phone(): def __init__(self,input): self.phone = input def __str__(self): return self.phone #convert to integer. def to_int(self): return int((self.phone).replace(" ","").repla...
I have allocated a chunk of memory of type char and size is say 10 MB (i.e mem_size = 10 ): int mem_size = 10; char *start_ptr; if((start_ptr= malloc(mem_size*1024*1024*sizeof(char)))==NULL) {return -1;} Now I want to store the size information in the header of the memory chunk.To make myself more clear, let's say: start_ptr = 0xaf86...
Hi, I cannot initialize a non-const reference to type T1 from a convertible type T2. However, I can with a const reference. long l; const long long &const_ref = l; // fine long long &ref = l; // error: invalid initialization of reference of // type 'long long int&' from expression of type ...
int newWidth = 100; int newHeight = 100; double ratio = 0; if (img1.Width > img1.Height) { ratio = img1.Width / img1.Height; newHeight = (int)(newHeight / ratio); } else { ratio = img1.Height / img1.Width; newWidth = (int)(newWidth / ratio); } Image bmp1 = img1.GetThumbnailImage(newWidth, newHeight, null, IntPtr.Zero); ...
Background: Let's assume I've got the following class: class Wrapped<T> : IDisposable { public Wrapped(T obj) { /* ... */ } public static implicit operator Wrapped<T>(T obj) { return new Wrapped<T>(obj); } public void Dispose() { /* ... */ } } As you can see, it provides an implicit type conversion ope...
I have an array of pointers to a base class, so that I can make those pointers point to (different) subclasses of the base class, but still interact with them. (really only a couple of methods which I made virtual and overloaded) I'm wondering if I can avoid using the pointers, and instead just make an array of the base class, but have ...
Hi, I have a byte array of around 10,000 bytes which is basically a blob from delphi that contains char, string, double and arrays of various types. This need to be read in and updated via C#. I've created a very basic reader that gets the byte array from the db and converts the bytes to the relevant object type when accessing the pro...
What are the different techniques for a floating point type to an integer type conversion, in c++? ...
In C++, the following lines have me confused: int temp = (int)(0×00); int temp = (0×00int); What is the difference between those 2 lines? ...
Well, the question is kinda simple. I have a object defined as: public class FullListObject : System.Collections.ArrayList, IPagedCollection And when i try to: IPagedCollection pagedCollection = (IPagedCollection)value; It don't work... value is a FullListObject... this is my new code trying to get around a issue with the "is" op...
I want to implement a generic method on a generic class which would allow to cast safely, see example: public class Foo<T> : IEnumerable<T> { ... public IEnumerable<R> SafeCast<R>() where T : R { return this.Select(item => (R)item); } } However, the compiler tells me that Foo<T>.SafeCast<R>() does not d...
Hi, this is probably the really newbie question (well, I'm pretty sure it is), but I have a float that's being returned and I need a quick and efficient way of turning it into an int. Pretty simple, but I have an exception. If the remainder of the float is anything other than .0 then I want to increment the int. Some quick examples: F...
Hello I'm developing a scientific application using .net framework. The application depends heavily upon a large data structure (a tree like structure) that has been serialized using a standard binaryformatter object. The graph structure looks like this: <Serializable()> Public Class BigObject Inherits List(Of SmallObject) End Class <...