Really, you are asking two different questions. Entity Framework is not a database administration tool and as such does not have any functionality for directly loading data from a spreadsheet. If you research each part of your question separately, you might have more luck. Seeding data with Entity Framework Reading Excel Files with C# Reply … Read more
Complete solution with regex : string source =”<img src=\”http://MyUrl.JPG.jpg\””; var reg = new Regex(“src=(?:\”|\’)?(?<imgSrc>[^>]*[^/].(?:jpg|bmp|gif|png))(?:\”|\’)?”); var match=reg.Match(source); if(match.Success) { var encod = match.Groups[“imgSrc”].Value; } solved Extract image URL in a string (RSS with syndicationfeed)
Extend the capturing group around the “one or more not white space” LinkParser = new Regex(@”\b(?<url>https?://\S+)[‘””]”, RegexOptions.Compiled | RegexOptions.IgnoreCase); Then access the match collection with m.Groups[“url”].Value A simpler pattern might also work well: \b(?<url>http.*?)[‘”] These are very primitive and I wouldn’t guarantee it works in all cases. If you have urls that aren’t quoted at … Read more
The first error is a typo you wrote pememory. The second error appears because you didn’t code any transformation between Float and ptrFloat. You should add a copy constructor to Float: Float(const Float& a) : Float(*a.fmem_top) {} And then a conversion constructor to ptrFloat: ptrFloat(Float a) : Float(a) { pmem_top=pmemory; *pmem_top=abc; pmem_top++; } PS: your … Read more
string *ptr = new string(“Hello”); The new operator mainly does two things: It allocates enough memory to hold an object of the type requested. (In the above example, it allocates enough memory to hold this string object) It calls a constructor to initialize an object in the memory that was allocated. Now this “new” is … Read more
It can be inferred from the error message, intarr_create(): null pointer in the structure’s data field, that data fields of each struct are expected to be allocated. intarr_t* intarr_create(size_t len){ intarr_t* ia = malloc(sizeof(intarr_t) * len); size_t i; for(i = 0; i < len; i++) { // ia[len].len = 0; // You can initialise the … Read more
// L is a data structure also known as a linked list. It has: struct L { int d; // a value L *p; // a pointer to the next element } // it creates the first element of the linked list, and assigns it a value of 3 L* l = new L; l->d … Read more
This may help. public static void PrintValues() { var array = new [] { “value”, “value2”, “value3”, “value4” }; foreach(var l in array) { System.Console.WriteLine(l); } } solved Need help turning a Lua function into a C#
Save time. Use an auto formatter. Hopefully then “why is the output like that “$$$$$”?” is self apparent. #include <stdio.h> int main() { int x = 11; int y = 9; if (x < 10) if (y > 10) puts(“*****”); else puts(“#####”); puts(“$$$$$”); return 0; } 6 solved What is exactly dangling-else problem in c? … Read more
After giving it some extra thought, it is not as simple as it initially appeared. There is one thing that prevents it from working – the code of functions is not context aware – there is no way of knowing the frame it was invoked in, and that has two implications: 1 – modifying the … Read more
First of all: Your functions void my_int_func(int x) and void my_int_func2(int y) do not return anything (return type void). They just prompt the input parameters to stdout. What you probably want is something like that #include <iostream> using namespace std; int my_int_func(int x) { return x; } int my_int_func2(int x) { return x; } void … Read more
You can disable the opening Form instead of making the modal child truly modal.. You can try this: Open the ‘modal’ children with this.Enabled = false; FormDlg yourModalChildForm= new FormDlg(this); yourModalChildForm.Show(); In the constructor write : Form myParent; public FormDlg(Form myParent_) { InitializeComponent(); myParent = myParent_; } And in the FormClosed write: private void FormDlg_FormClosed(object … Read more
Your studentfile is most likely in a fail state, as you never check whether the read operations are successful or not. Change the code as follows: if(!(studentFile >> ssn >> resident >> hours)) { std::cout << “read failed”; return 1; } //… do { // Do stuff // REMOVE THIS LINE: studentFile >> ssn >> … Read more
int main(void) { float x,y,sum; char ch; do { printf (“Enter the first number:”); scanf (“%f”,&x); printf (“Enter the second number:”); scanf (“%f”,&y); sum=x+y; printf (“The total number is:%f\n”,sum); printf (“Do you want to repeat the operation Y/N: “); scanf (” %c”, &ch); } while (ch == ‘y’ || ch == ‘Y’); } This uses … Read more
The std::valarray class + std::gslice can be used for administrating 2D, 3D … ND matrices. http://en.cppreference.com/w/cpp/numeric/valarray http://en.cppreference.com/w/cpp/numeric/valarray/gslice See some example in the link. If your intention is the image manipulation refer to the specific specialized libraries (jpeg, png ….). 2 solved No 2D Image container in c++ [closed]