C# :: Convert List (string) To DataTable Using Reflection?

Dec 10, 2014

Okay, so I'm getting an error I've never seen before.. I'm trying to convert a List<string> to a DataTable. Not a List<string[]>, but a regular ol' List<string>. I figured this code would do the trick, but to no avail:

public static DataTable ToDataTable<T>(List<T> items) {
DataTable dataTable = new DataTable(typeof(T).Name);
//Get all the properties
PropertyInfo[] Props = typeof(T).GetProperties(BindingFlags.Public | BindingFlags.Instance);
foreach (PropertyInfo prop in Props)

[Code] ....

I keep getting an error on "values[i] = Props[i].GetValue(item, null);", that reads:

"An unhandled exception of type 'System.Reflection.TargetParameterCountException' occurred in mscorlib.dll

Additional information: Parameter count mismatch."

I don't know what it means by Parameter count mismatch...

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C# :: Invoke Method In Nested Class Using Reflection

Jun 25, 2014

I am having problems invoking methods in a nested class using reflection. I have the following:

A parent class, Group, that holds instances of a simple class called Signal. I want to modify the number of instances inside the group class often. So, all my code has to be dynamic and use reflection to know how many instances of signal there are inside the Group class.

class Group{
public static Signal name1 { get; set; }
public static Signal name2 { get; set; }
public static Signal name3 { get; set; }

[Code]....

I had no luck invoking the method of the instances of signal class that are inside the Group class. I tried getting the methods name using getMethods() but could not navigate through the syntax.

How could I invoke and pass parameters to the method of the instances of signal using reflection? Is there a better way of accessing the properties and methods of nested classes?

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C# :: Unable To Implicit Convert Type Int To String Though Declared Variables As String

Mar 26, 2014

Ok, so I'm writing this code and when I build it keeps saying cannot implicitely convert type int to string even though I declared my variables as string. Why is it giving me this error?

private static string Repair()
{
string result="";
string beep;
string spin;
Console.WriteLine("Does your computer beep on startup?:(y,n)");

[Code]...

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C++ :: Convert And Return C Format String To String?

Jun 8, 2014

heres the function:

string ToString ( const char * format, ... )
{
char buffer[256];

[Code]....

these function do the same of the sprintf() function. but instead we use a variable for add the result, i want to return the result. when i use it:

string f;
f=ToString("hello world");
gives me several errors:
"error: crosses initialization of 'std::string f'"
"error: jump to case label [-fpermissive]"

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Visual C++ :: How To Convert UTF-8 String To Unicode String

Jun 15, 2013

I am using Visual Studio 2008. I just wonder if there are any library function in Windows SDK or MFC, or from third-parties, that can convert a UTF-8 string into Windows Unicode string(used in CString object).

Can MultiByteToWideChar or ATL String conversion macro like A2W to the conversion?

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C Sharp :: How To Add Textbox In Datatable In C#

Feb 13, 2013

how to add textbox in datatable in c#

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C :: Convert From Array To List And Back

Nov 26, 2013

I need to convert from an array to a list and back.

array to list: (x,y) to int and int to (x,y)

I wrote this function:

Code:
/*
* inputs:
* coordX: column;
* coordY: line;
* nc: number of colums

[Code] ....

It works fine but the other way around is giving me sleeping problems. I was thinking something about this:

Code:
/*
* inputs: integer
* returns: X coordinate
*/
int inttoX(int n, int nc){
int coordX;

[Code] .....

I don't need the code, just want to continue... i'm a little blocked.

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C Sharp :: Convert A List To Buttons

May 27, 2012

I have a txt file of drinks, and I want to meak a list of buttons of it (the txt file is build like this: fanta : 2 ), how can I make buttons of all the drinks ( I get the first one in a button , but not the others).

Dictionary<string, double> drank = new Dictionary<string, double>();
     string[] words = new string[8];
     Button button;
     <Button> BtnList = new List<Button>();

[Code] ....

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C# :: Fetch Column Value From Datatable To Compare

Dec 16, 2014

I am getting a excel sheet in datatable with some column "Program,Response,T,Timein".There is 3 condition for filtering datatable.

1.fetch unique program.so i got dis.
2.T not equal to "B". I also got dis.
3.Response should be > 5000. I also got dis data in datatable.

Now in Datatable I have same program name presented 3 times with response>5000 nd T<>B.Now I want to fetch only the maximum respnse among 3 of them. so every time my program should be change and for that program I need to pickup max response so How can I do this? for the same I put two loops

for (int i = 0; i < DataFilter.Rows.Count; i++) {
DataRow dr = DataFilter.Rows[i];
DataView dv2 = new DataView();

[Code]....

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C Sharp :: TreeView To Database Or At Least DataTable

Feb 8, 2014

The main question how to fully traverse/circumvent through all TreeView, for transforming Tree structure into a Table structure.

I want to note that the TreeView may contain a different number of branches, with different depths and different names.

I found a lot of information how to populate TreeView e.g. from DataTable, but I didn't found information how to recursively traverse/circumvent a TreeView and populate/fill data e.g. to DataTable.

As sample I have following TreeView:

Aaron
-Baldwin
--Caleb
---Dale
--Earl
-Fabian
Gabriel
-Harold
-Ian

Necessary to convert the TreeView into e.g. DataTable:

id | Name | ParentId
--------------------------------
1 | Aaron | null
2 | Baldwin | 1
3 | Caleb | 2
4 | Dale | 3
5 | Earl | 2
6 | Fabian | 1
7 | Gabriel | null
8 | Harold | 7
9 | Ian | 7

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C Sharp :: Filling In DataTable Using OleDb

Jul 2, 2013

For some reason I am having problems doing this simple task. I just want to run a query in Access to select a field from the table that is "like" the string being inputted.

However, the dataset comes back empty...well not empty, I get a column name but no data. So when I type in

ds.Tables[0].Columns[0].ColumnName

I get the column name coming from the database ("ParcelNumber"). When I run the query inside Access I receive the desired information. But when I try to check for the info in code

ds.Rows[0]

I get "There is no row at position 0".

public DataTable FindFullPNusingPartialPN(string _parcelNumber)  {
                 OleDbConnection conn = new OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;
Data Source=" + ConfigurationManager.AppSettings["TaxCert_Database"]);
DataTable dt = new DataTable();

[Code] ....

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C# :: Convert Anonymous Type List Into Bindinglist?

Sep 26, 2014

So I query out data from multiple tables and I put it as anonymous type. But since I need to get the remove function going, my datagridview has to get datasource from a bindinglist, not just a list. What could I do from this situation? I already checked: [URL] but intellisense doesn't pick up the .ToBindingList() function for my query.

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C Sharp :: Convert Dropdown List To Int Datatype

Mar 16, 2013

I am need to compare 2 items from 2 separate drop down lists. These values are of int type. Say for example 2 drop down lists showing years. Now i need to find out these 2 years selected is greater or nearer to the current year.

I tried converting the values i receive from the drop down lists to int variables. But i am getting error then. I gave it like below.

int tmp = Convert.ToInt32(ddl_1.SelectedItem.Text);

this gives an error like this - Input string was not in correct format.

I need to know how to put an item from a drop down list to a variable of int data type.

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C# :: High RAM Usage On Postback Caused By Datatable

Dec 23, 2014

I basically have a listbox that has postcode areas i.e : AE,CW,GU etc etc.

The user selects this and then a postback occurs - an sql statement is builts and a database query operation is performed and the results are returned to a datatable called tempdata.

So far so good. I then need to loop through this datatable and copy the records to my main viewstate datatable which is the datasource for google maps api.

DataTable tempstore = GetData(querystring, "");
//check tempstore has rows otherwise add defaultcust as default otherwise map will be blank
if (tempstore.Rows.Count == 0)
{

[Code].....

So my main datatable can grow and grow as users add more postcodes. However when it gets to around 500 rows or so I get a huge memory spike only on postback and then it settles back down.

My ram usage goes from 2gb to 3gb and if even more postcodes is selected it maxes the memory and crashes my pc.

If I remove the:

dtpc.Importrow(row);

the memory spike goes completely, obviously because the main datatable has no rows. I thought you only run into memory issues when you have thousands of rows?

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C# :: Fetch Datatable Values To Perform Some Operation

Dec 16, 2014

I am having some column say "Response" column in my Datatable.Now I want to fetch this particular column value and compare this value with the maximum response how to fetch and compare it in C#.net .. This is my code.

for (int i = 0; i < DataFilter.Rows.Count; i++) {
DataRow dr = DataFilter.Rows[i];
DataView dv2 = new DataView();
dv2 = DataFilter.DefaultView;

[Code] ......

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C :: Convert From Strings To Integers And Pass Into Linked List

Feb 11, 2013

I have a problem set where i have to read in numbers from a file as strings, convert from strings to integers, and pass the integers into a linked list, where each integer is a node. This is what I have so far:

Code:
# include <stdio.h>
# include <stdlib.h>
# define MAX_INT_SIZE 10000
typedef struct integer BigInt;
struct integer {

[Code] ......

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Visual C++ :: LINQ Query To Select Distinct Value From Datatable

Oct 29, 2013

I entered to Visual C++ 2010. Now my intention is to prepare a LINQ Query to select a distinct value from a datatable...

In C# My Query
============
var ProjLnkQry = (from P in MyClass1.ProjTbl.AsEnumerable() select P["proj_name"]).Distinct().ToList();

The above query I try to convert it into VIsual C++

auto DistDepQry=(from v1 in MyGlobalData::ProjectTbl::AsEnumaerable() select v1["depart_name"])->Distinct()->ToList();

But not succeeded.... I found the error like : "from" undeclared Identifier.....

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C++ :: Convert List Of Binary Numbers From A File Into Decimal And Print To Screen

Sep 23, 2014

I am trying to make a program that will convert a list of binary numbers from a file into decimal and print the decimal to the screen. I have no problem doing the conversion, the problem comes up when our teacher wants the input file in a format as such:

3
10110101
11111111
10101010

The first number is supposed to tell the program how many different 8bit strings it is going to have to convert, and then the following lines are those binary numbers.

I am not very experienced with file inputs, and I know how to open files and read lines in.. The problem is, how to say "ok the first line says 3, so now I have to convert the next 3 lines" . I am assuming it is just a simple loop that I am missing....

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C Sharp :: Linq - How To Group Values Week Wise And Store In Another Datatable

Apr 9, 2013

I have a datatable which comprises values from 1st January to march, something like this:

DataTable datatable = new DataTable("Employee");
datatable.Columns.Add("Date", typeof(string));
datatable.Columns.Add("Employee", typeof(string));
datatable.Columns.Add("Job1", typeof(double));
datatable.Columns.Add("Job2", typeof(double));  
datatable.Rows.Add(new Object[] { "1/4/2013", "A", 1.3, 2 });

[Code] ....

The result should look like this for Job1:

Employee 1/7-1/13 1/14-1/20 1/21-1/27 1/28-2/3 and so on...
A sum of values for this 7 days
B
C
D

I want to add all the values of Job1 for each employee in a time range which is one week starting from monday to sunday. How can I group the Job1 values week wise and store them in another datatable.

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C++ :: Convert A Value Into A String?

May 21, 2013

I would like to convert a value into a string, and extract a value from a string. And then call these functions in the main.

template<class T>
string toString (T value) // convert a value into a string {
stringstream ss;

[Code[ .....

Are above functions correct? And how should I call in main?

int main() {
const int SIZE=10;
toString<int> intValue(SIZE); //seems not right
toString<double> doubleValue(SIZE); // seems not right
}

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C :: Convert String To Arithmetic?

Mar 16, 2014

I've got this string: Code: char * string = "2+2"; I want to get an integer value = 4 from this. How would I go about doing this.

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C :: Convert String To Double

Mar 6, 2015

I want to convert string to double. I refered this strtod() - C Library Function Example

Code:

#include <stdio.h>
#include <string.h>
int main() {
const char string[] = "$$GPRMC,013732.000,A,3150.7238,N,11711.7278,E,0.00,0.00,220413,,,A*68";
char term;
const char delims[] = ",";
}

[code]....

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C++ :: Convert String To Char

Apr 30, 2013

Is there anyway to convert std::string to char*?

Like:

std::string x="hello world";
char* y=x;

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C++ :: Convert String IP To Unsigned Int

Nov 10, 2014

I need to convert a string IP to an unsigned int (uint32), but however solutions I've found elsewhere have not worked (such as `atoi`).

When using `(uint32)"54.171.82.217 ";` : [URL] ....

When using `atoi("54.171.82.217");`: [URL] .....

How can I correctly convert the string version of the IP to the uint32 type?

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C++ :: How To Convert Numbers To String

Sep 26, 2014

I'm trying to get two numbers longer than long long int and add them together and multiply. I'm not sure how to convert the numbers to a string.

#ifndef BIG_INTEGER_H
#define BIG_INTEGER_H
#include "BigIntegerException.h"

class BigInteger {
private:
int biginteger[500];
int bigintegertwo[500];

[Code] .....

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C++ :: Convert String Of Hex To Char

Jul 5, 2013

I have this code working:

char tmp_wku[3];
tmp_wku[0]=0x01;
tmp_wku[1]=0x9D;
tmp_wku[2]=0x62;
char tmp_com[11];

[Code] ....

This sends the buffer to a LIN modem. My question is: can this be done better. If I have a astring of hex numbers like "09 98 88 55 42 FF 00 00 FF BD 89". How could I send this without manually makng a char with hex numbers?

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