C Sharp :: How To Cast Dataset To Strongly Typed Object

Dec 17, 2014

Following is my xml file called PropertyInfo.xml :-

<?xml version="1.0" encoding="utf-8" ?>
<PropertyInformation>
<locations>
<location name="Bombay">

[Code].....

In above LoadPropertyInfo() method, how to cast DataSet to List<Location> locations before returning "locations" ?

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C Sharp :: Data Is Not Getting Updated In Dropdownlist Using Dataset

Nov 26, 2013

Data is not getting updated in dropdownlist using data set:

 protected void SpecificationNameDropDownList_SelectedIndexChanged(object sender, EventArgs e)  {
            if (SpecificationNameDropDownList.SelectedItem.Text != null) {
                SpecificationValueLabel.Visible = true;
                SpecificationValueDropDownList.Visible = true;

[code].....

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C++ :: Cast Directly Between Base Classes Of Object?

Jul 1, 2013

I've got two classes, which are both derived from the same two base classes. Here's a representation of the actual code:

Code: #include <vector>
class BaseClassA {
};
class BaseClassB {
};
class TestClassX
: public BaseClassA,
public BaseClassB

[code].....

Basically, I'd like to know if it is possible to cast directly from a BaseClassA pointer to a BaseClassB pointer, without casting to the child class first.

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C/C++ :: Automatic Cast Object To OpenGL Handle / ID

Oct 24, 2014

I programming currently something with OpenGL. Now I have written some wrapper classes, like Shader, Program .... All works fine, but I don't like to call Shader.GetHandle() every time I want to call a OpenGL function manually where I need the object handle/id. (GetHandle() returns the OpenGL ID of the object)

So now I wonder, is it possible to program it in C++ so, that I can put my objects to gl methods and c++ automatically pass the handle/id member to that function ? Is there maybe a operator that I can use for that?

For example:

The way I do it now:

Shader vertexShader();
glCompileShader(vertexShader.GetHandle());

The way I want to:

Shader vertexShader;
glCompileShader(vertexShader);

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C Sharp :: Type Cast Array From Int To Long

Aug 1, 2012

my array contains elements of integer type

how can i convert my array to long array

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C Sharp :: Call That Counts Number Of Entries In Database - Cast Error

Jul 14, 2013

I have an issue with a database call. I've got a database call that counts the number of entries in the database:

        private static Int32 dbCount() {
            SqlCommand cmd = new SqlCommand("SELECT COUNT (*) FROM Employees", conn);
            conn.Open();
            Int32 count = (Int32)cmd.ExecuteScalar();
            conn.Close();
            return count;
        }  

Afterwards I'm using this as a check throughout my application:

           if (dbCount > 0)  {
                // do something
            }  

When I execute this code I'm getting the following error: "Operator '>' cannot be applied to operands of type 'method group' and 'int'"

So I'm guessing it has something to do with the cast of the dbCount-object but I don't understand why as I already stated that the count-object to be an Int32.

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C Sharp :: Object Reference Not Set To Instance Of Object?

May 4, 2013

I have a combobox with Items 1024
2048
4096
8192

String cach = form.comboCache.SelectedItem.ToString();

I am using the above code to retrive an item selected by user,But this line is giving an exception "Null Reference Exception, Object reference not set to an instance of an object"

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C++ :: Program That Remove 0 From N Typed Numbers

Dec 23, 2014

I`ve made a program that removes "0" from "n" typed numbers now i have to do the same but remove the duplicate here is my program:

#include <iostream>
#include <new>
#include <fstream>
using namespace std;
int main () {
//declaration of variables:

[Code] ...

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C# :: WebMethod Can't See DataSet

Nov 16, 2014

I'm trying to create a web service that uses a dataset called dsPeople, but it doesn't seem to know where it is, and gives me a directive/namespace error underneath it where it occurs. Do I need to declare it somewhere or something?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Services;
using System.Data;
using System.Data.OleDb;
namespace WebServiceTest

[code]....

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C :: Program To Take Time And Date Typed By User And Increase It By 1 Minute

Mar 22, 2013

I'm having a problem with my homework. The task is to write a program that will take time and date typed by user, and increase it by 1 minute. I should write 3 functions - first calls second function that updates time and calls third function, if time is 00:00.Time update works, but date update does not.My whole written code:

Code:

#include<stdio.h>
struct DateAndTime {
struct date {
int day;
int month;
int year;

[code]....

I should check if inputs are numbers only, so I tried including isdigit function from ctype.h library, but that didn't work either, after I was trying it for a good hour or so, but I kinda rage quit that...

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C++ :: Accept Input Till User Hits Enter With No Text Typed

Feb 27, 2012

It seems to be going null. I can't get a null value, I want it to accept input till the user hits enter with no text typed. I've tried checking to see if the input is NULL, "", and " " all to no avail.

Code:
#include <stdio.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <iostream>
#include <fstream>
#include <string.h>
#include <cstring>
using namespace std;
int main() {
string info = "";

[Code] ....

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C# :: Dataset Loading Most Recent Records?

May 16, 2014

what I need to do is load a dataset with the most recent record for each item in the database table. Each item has an ID, location ID and date along with some numeric data. the item ID, location ID, and date is referenced in each record of the table. So each item will have multiple records with different dates that could be anything. To make things worse there may be the same item in multiple locations. and each locations items most recent record needs to loaded in to the dateset and then displayed in a data grid. At a later time there will be a location sort as well so only items in a particular location or group of locations will be loaded. More question on the data grid to come.

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C Sharp :: Making A Reference To Object

Mar 19, 2014

In a project I'm building I have 4 datagrids which I'm using and where I'm updating information manually, so not from a database or a list.

Now to make it a bit easier I would like to use one generic sort of variable to prevent having to write the same code 4 times.

So if I have 4 datagridviews DataGrid1 through DataGrid4 I would like to be able to assign one of those Datagridview to a general object that has all of the properties and methods in it.

I was thinking of using something like this:

object DataGrid = DataGrid1  
DataGrid.Rows.Add("INFO");  

But that doesn't work.

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C# :: Using Dataset Result As A Variable In A Stored Procedure

Aug 6, 2014

I'm trying to pass one dataset's result as a variable in another stored procedure and this is what I have so far:

DataSet dsID = StoredProcedures.GetID((int)Session["TypeID"]);
int IDValue = Convert.ToInt32(dsID.Tables[0].Rows[0]["ID"]);
DataSet dsRequest = StoredProcedures.GetRequest(IDValue);

But I get the error: cannot implicitly convert to system.dataset.

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C Sharp :: How To Make Object In Form1 Work In Form2

May 20, 2012

I've got a calendar in Form 1 in my code, and buttons in Form2. I need these buttons to send codes for this calendar in Form1. How may I make these work? My friend told me to do a function as a new class, but I'm not sure how can I do this.

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C++ :: Inherit Class Variable - Shrink Duplicate Dataset From CWorksheetTwo?

Mar 30, 2012

Code:
class CUser {
public:
CUser();
~CUser();
protected:
std::string firt_name;
std::string last_name;

[Code] .....

How would I go about shrink the duplicate data set from CWorksheetTwo? For CWorksheetTwo has both CUser and CUserEx, and I only need CUserEx, and all other classes are happy with CUser

Since there is no such thing virtual variable what are my choices? In CWorksheetTwo set users to NULL and use another exclusively? Change CSettings variable to template <class T> std::vector<T>users?

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C :: Cast Int To Char

Oct 2, 2014

Is it possible to get the string representation of an int. So I mean if i have: 5, I want to get '5'.

I was searching in the internet and I found this solution:

Code:
int number = 5;
char c = number + '0'; which works fine for small numbers, but if I do:
Code: int i;
char c;
for(i =0; i < 10000; i++) {
c = i + '0';
printf("%c
", c);
}

At some point some strange sings like %&/)/)$%&) are appearing, But i really need this huge numbers as well .. Is there any other way to do this??

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C++ :: Cast Int To A String

Sep 29, 2013

How to cast an int to a string I came across this code:

#include <iostream>
#include <string>
int main(){
double f = 23.43;
std::string f_str = std::to_string(f);
std::cout << f_str << '
';
}

Unfortunately, using Dev C++ Version 5.4.2, I'm getting an error:

[Error] 'to_string is not a member of 'std'

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C :: Cast Of The Pointer To Array

Dec 7, 2013

In my refference book I have got a example with a part saying to access the a[4][0] element of the array (named a) with pointer this can be written:

*((int*)a+4)

I wonder if the cast is really required. The book says it is required so that the pointer arithmetic can be done properly. However I am not sure about it. When I work with pointers defined by myself I don't use casts similar to this one. Is there a difference between a self defined pointer and array name?

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C :: Type Cast To Char

May 7, 2014

I have this program.

Code:
int test_variable;
int main() {
test_variable = (int)0x12;
}

Now my doubt is what is the advantage of type casting 0x12 to int. suppose if the test_variable data type is "char" then should i type cast to "char"?

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C# :: Limitation Of Array Cast

Mar 14, 2012

Code:

namespace ConsoleApplication1 {
class ImplicitlyConvertibleFromFoo {
public ImplicitlyConvertibleFromFoo(Foo foo) {
this.foo = foo;
}
Foo foo;

[code]....

Any way to easily convert arrays of user-defined types?

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C++ :: Dynamic Cast With Reference

Jun 20, 2013

Here is the code,

Code:
class B {
};
class D1:public B {
};
class D2:public D1 {
};

int main() {
B& b = dynamic_cast<B&>(*(new D2));
return 0;
}

D2 is actually grandchild of B, so D2 object reference can still be converted to B reference without any exception. Is it legal?

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C++ :: Forceful Type Cast Not Working

Mar 6, 2015

I am writing a program with FLTK and in event handling part wanted to send the address of the handler function to callback function. Type cast just does not work.

Code: btnOpenDB->callback(&FLUI::WndMain::DBOpenBtnClick_scb, reinterpret_cast<void*>(&WndMain::DBOpenBtnClick_cb));

I want to cast "a pointer to a class member function which accepts one argument" to a void pointer. After all it is just an address. So it is logically possible to cast it. Isn't it? Actually an static_cast should be enough!

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C :: Makes Integer From Pointer Without Cast

Mar 18, 2013

The warning: :63:7: warning: passing argument 1 of fputc makes integer from pointer without a cast [enabled by default]

Code:

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <sys/types.h>
#include <sys/stat.h>

[Code]....

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C :: Making Integer From Pointer Without A Cast

Dec 15, 2013

Code:
#include <stdio.h>
#include <stdlib.h>
#define CLASS 4
#define STUDENT 11
#define GRADE 5

[Code] ....

Giving me that error on 75:10
avesub+=grade[k];
and 90:17
donkeypunch+=grade[j][k];

not sure exactly why

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C :: Cast To Character Pointer For Printf

Apr 18, 2014

I cannot get the following to compile. The problem is the printf on the last line. I understand that printf requires a char (or pointer to char). I understand that I can convert between datatypes by putting the target data type in parenthises in front of the variable. But how do I cast the integer into a character and then get it's pointer to pass into printf?

Following is my code. I compile with gcc temp.c -o temp.

Note that I have tried many attempts at that last line and this is just the one that I really, really think should work (or is at least the closest to the correct answer).

This code shown below, using printf("%s", &(char)nextChar); returns

temp.c:26: error: lvalue required as unary '&' operand

If I try to use printf("%s", *(char)nextChar); I get the error

temp.c:26: error: invalid type argument of 'unary *' (have 'int')

This line printf("%s", (char)nextChar); returns the obvious

format '%s' expects type 'char *', but argument 2 has type 'int'

Code:

#include <stdio.h>
int main() {
printf("hello, world
");
#if defined(SUNDIALS_EXTENDED_PRECISION)

[Code] ....

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