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Go over to QA, and look at the amount of effort some students will put into avoiding learning how to write code: they will invest hours in trying to get you to write a five line console app... 
These are the people that want var to be usable outside Linq queries.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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But doesn't everyone want to be a "project manager" ... and skip all that "techie" stuff?
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TheOnlyRealTodd wrote: 3. It decodes the AudienceSecret from Base64Url into a byte array? <----This is where I'm confused. The secret is just a URL???
The secret is a Base64[^]-encoded byte array.
The TextEncodings.Base64Url.Decode method uses Convert.FromBase64String[^]. It replaces some characters that can't be used in a URL, and pads the string to the correct length.
It's not clear why you'd need to do that, since you're not passing the string in a URL.
public class Base64UrlTextEncoder : ITextEncoder
{
public string Encode(byte[] data)
{
if (data == null) throw new ArgumentNullException("data");
return Convert.ToBase64String(data).TrimEnd('=').Replace('+', '-').Replace('/', '_');
}
public byte[] Decode(string text)
{
if (text == null) throw new ArgumentNullException("text");
return Convert.FromBase64String(Pad(text.Replace('-', '+').Replace('_', '/')));
}
private static string Pad(string text)
{
int count = 3 - (text.Length + 3) % 4;
if (count == 0) return text;
return text + new string('=', count);
}
}
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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I'm trying to do an if record exists update statement else insert statement and can't get past the line:
OracleDataReader reader = check_RID.ExecuteReader();
Keep getting ora-00096 missing expression error:
OracleConnection con = new OracleConnection(strConnection);
con.Open();
OracleCommand check_RID = new OracleCommand("SELECT COUNT(*) FROM CONTRACT_INFO WHERE (rid = @rid)", con);
check_RID.Parameters.Add("@rid", labelRID.Text);
OracleDataReader reader = check_RID.ExecuteReader();
if (reader.HasRows)
{
OracleConnection conn = new OracleConnection();
conn.ConnectionString = strConnection;
conn.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = "UPDATE...
cmd.ExecuteNonQuery();
conn.Close();
Response.Redirect("primecontractor.aspx?Id=" + labelRID.Text);
}
else
{
OracleConnection conn = new OracleConnection(); // C#
conn.ConnectionString = strConnection;
conn.Open();
OracleCommand cmd = new OracleCommand();
cmd.Connection = conn;
cmd.CommandText = "INSERT....
......
cmd.ExecuteNonQuery();
conn.Close();
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From MSDN:
When using named parameters in an SQL statement called by an OracleCommand of CommandType.Text, you must precede the parameter name with a colon . However, in a stored procedure, or when referring to a named parameter elsewhere in your code (for example, when adding OracleParameter objects to the Parameters property), do not precede the named parameter with a colon. The .NET Framework Data Provider for Oracle supplies the colon automatically.
Also rather than execute a reader why not use scalar as COUNT returns a single value test it non-zero.
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AFAIK, the Oracle command uses a : as the parameter prefix, not a @.
OracleCommand check_RID = new OracleCommand("SELECT COUNT(*) FROM CONTRACT_INFO WHERE (rid = :rid)", con);
check_RID.Parameters.Add("rid", labelRID.Text);
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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I have created game with signs.Computer randomly select random combination of four signs to be found.User click button with sign and clicked sign appears in pictureBox.How to make to remove sign in pictureBox when user clicks on it and let him select sign from button again ?
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I set one pictureBox like this, I click button and it removes picture, but when I click button again it adds picture that was before removing and ads new picture from clicked button!!!
private void pBoxIgra00_Click(object sender, EventArgs e)
{
pBoxIgra00.Image = null;
}
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Just Update() the PictureBox after assigning a new image.
pBoxIgra00.Update();
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It does not work.When I click again on button after remove image on first pictureBox it shows image on first pictureBox and on second pictureBox instead of only first pictureBox!!!
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I don't understand your requirement complete - the expaining of the issue is not good 
What have you allready coded around this function AND what happens exactly ?
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I added this to pictureBox click.I click button with sign and it appears inside pictureBox,after that I click pictureBox image is removed,after I click other button with sign again it adds two images,in first pictureBox it adds image that was removed and in second pictureBox adds image that I clicked instead of just adding image that I clicked to first pictureBox !!!
private void pBoxIgra00_Click(object sender, EventArgs e)
{
pBoxIgra00.Image = null;
}
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Show your complete code. How do you assign the Image-Property ?
When I tried at on my System it is working as awaited ...
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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Slagalica
{
public partial class Skocko : MetroFramework.Forms.MetroForm
{
public Skocko()
{
InitializeComponent();
}
private SkockoClass objSkocko;
private void Skocko_Load(object sender, EventArgs e)
{
this.objSkocko = new SkockoClass();
}
private void pictureBox14_Click(object sender, EventArgs e)
{
}
private void pictureBox38_Click(object sender, EventArgs e)
{
}
private PictureBox findMyPictureBox(string parPrefix, int parRed, int parKolona)
{
return (PictureBox)base.Controls[string.Format("{2}{0}{1}", parRed, parKolona, parPrefix)];
}
private PictureBox findMyPictureBoxDobitna(int parBroj)
{
return (PictureBox)base.Controls[string.Format("pBoxDobitna{0}", parBroj)];
}
private void OsvezipBoxIgra()
{
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 4; j++)
{
if (this.objSkocko.glavnaMatrica[i, j] != 100)
{
PictureBox pictureBox = this.findMyPictureBox("pBoxIgra", i, j);
pictureBox.Image = this.imageList1.Images[this.objSkocko.glavnaMatrica[i, j]];
}
}
}
}
private void OsvezipBoxRezultat()
{
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 4; j++)
{
if (this.objSkocko.rezultatMatrica[i, j] != 100)
{
PictureBox pictureBox = this.findMyPictureBox("pBoxRezultat", i, j);
if (this.objSkocko.rezultatMatrica[i, j] == 1)
{
pictureBox.BackColor = Color.Yellow;
}
else
{
pictureBox.BackColor = Color.Red;
}
}
}
}
}
private void OsvezipBoxDobitna()
{
for (int i = 0; i < 4; i++)
{
PictureBox pictureBox = this.findMyPictureBoxDobitna(i);
pictureBox.Image = this.imageList1.Images[this.objSkocko.dobitnaKombinacija[i]];
}
}
private void Igraj(int parZnak)
{
this.objSkocko.Igraj(parZnak);
this.OsvezipBoxIgra();
this.OsvezipBoxRezultat();
if (this.objSkocko.Pobeda)
{
this.OsvezipBoxDobitna();
if (MessageBox.Show("POBEDILI STE!!!\nNova igra?", "POBEDA", MessageBoxButtons.OKCancel) == DialogResult.OK)
{
Application.Restart();
}
else
{
Application.Exit();
}
}
if (this.objSkocko.trenutniPotez == 23)
{
this.OsvezipBoxDobitna();
if (MessageBox.Show("IZGUBILI STE!!!\nNova igra?", "PORAZ", MessageBoxButtons.OKCancel) == DialogResult.OK)
{
Application.Restart();
}
else
{
Application.Exit();
}
}
}
private void btnIgrajSkocko_Click(object sender, EventArgs e)
{
this.Igraj(0);
}
private void btnIgrajZvezda_Click(object sender, EventArgs e)
{
this.Igraj(1);
}
private void btnIgrajPik_Click(object sender, EventArgs e)
{
this.Igraj(2);
}
private void btnIgrajKaro_Click(object sender, EventArgs e)
{
this.Igraj(3);
}
private void btnIgrajHerc_Click(object sender, EventArgs e)
{
this.Igraj(4);
}
private void btnIgrajTref_Click(object sender, EventArgs e)
{
this.Igraj(5);
}
}
}
Other class with code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Slagalica
{
class SkockoClass
{
public int trenutniPotez;
public int[,] glavnaMatrica;
public int[,] rezultatMatrica;
public int[] dobitnaKombinacija;
public bool Pobeda;
public SkockoClass()
{
this.Pobeda = false;
this.trenutniPotez = -1;
this.InicijalizacijaMatrice();
this.GenerisiDobitnuKombinaciju();
}
public void Igraj(int parIzabrano)
{
this.trenutniPotez++;
int num = Convert.ToInt32(Math.Floor((double)this.trenutniPotez / 4.0));
int num2 = this.trenutniPotez % 4;
this.glavnaMatrica[num, num2] = parIzabrano;
if (this.trenutniPotez % 4 == 3)
{
this.Provera(num);
}
}
public void Provera(int parRed)
{
int[] array = new int[4];
int[] array2 = new int[4];
for (int i = 0; i < 4; i++)
{
array[i] = this.glavnaMatrica[parRed, i];
array2[i] = this.dobitnaKombinacija[i];
}
int num = 0;
for (int i = 0; i < 4; i++)
{
if (array[i] == array2[i])
{
num++;
array[i] = 100;
array2[i] = 100;
}
}
int num2 = 0;
for (int i = 0; i < 4; i++)
{
if (array[i] != 100)
{
for (int j = 0; j < 4; j++)
{
if (array2[j] != 100 && array2[j] == array[i])
{
num2++;
array[i] = 100;
array2[j] = 100;
}
}
}
}
if (num == 4)
{
this.Pobeda = true;
}
this.PuniZuteCrvene(parRed, num2, num);
}
public void PuniZuteCrvene(int parRed, int parZutih, int parCrvenih)
{
int num = -1;
for (int i = 0; i <= parCrvenih - 1; i++)
{
this.rezultatMatrica[parRed, ++num] = 0;
}
for (int i = 0; i <= parZutih - 1; i++)
{
this.rezultatMatrica[parRed, ++num] = 1;
}
}
public void GenerisiDobitnuKombinaciju()
{
this.dobitnaKombinacija = new int[4];
Random random = new Random();
for (int i = 0; i < 4; i++)
{
this.dobitnaKombinacija[i] = random.Next(0, 6);
}
}
private void InicijalizacijaMatrice()
{
this.glavnaMatrica = new int[6, 4];
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 4; j++)
{
this.glavnaMatrica[i, j] = 100;
}
}
this.rezultatMatrica = new int[6, 4];
for (int i = 0; i < 6; i++)
{
for (int j = 0; j < 4; j++)
{
this.rezultatMatrica[i, j] = 100;
}
}
}
}
}
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Sorry ... at first :
A lot of descriptions in your code are not understandable for me (because of your mother-language - Croatia ?).
What I missed was the code-part with which you have a Problem - the part where the Image-assignment is changed ...
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public void FillCompVouType()
{
try
{
this.Cursor = Cursors.WaitCursor;
con = new SqlConnection(cs.sourceConn1);
con.Open();
scmd = new SqlCommand("Select Distinct VouType From Table_name Where Colum=1 order by VouType", con);
SqlDataReader DR = default(SqlDataReader);
vochcombox.Items.Clear();
DR = scmd.ExecuteReader();
foreach (int VouType in DR)
{
vochcombox.Items.Add(VouType);
}
while (DR.Read())
{
this.vochcombox.Items.Add(DR.GetOrdinal("VouType"));
}
DR.Close();
con.Close();
this.Cursor = Cursors.Default;
}
catch (Exception ex)
{
this.Cursor = Cursors.Default;
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
if (con.State == ConnectionState.Open)
{
con.Close();
}
}
}
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Which line is it complaining about? I see no explicit casts in there.
Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...
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foreach (int VouType in DR)
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see my answer (under this) with it's question ...
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DR = scmd.ExecuteReader();
foreach (int VouType in DR)
Are you sure that VouType is an Integer ?
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Member 12899746 wrote: foreach (int VouType in DR)
{
vochcombox.Items.Add(VouType);
}
You can't use a SqlDataReader like that. Each record could contain multiple fields, and it would have no way of knowing which field you want to convert to an integer.
Member 12899746 wrote: while (DR.Read())
{
this.vochcombox.Items.Add(DR.GetOrdinal("VouType"));
}
That's closer, but still not right. GetOrdinal returns the index of the specified field, not the value of that field.
You need to use the GetInt32 method to retrieve the value of the field as an int.
You should also wrap your connection, command, and data-reader objects in using blocks.
public void FillCompVouType()
{
Cursor = Cursors.WaitCursor;
try
{
using (var connection = new SqlConnection(cs.sourceConn1))
using (var command = new SqlCommand("Select Distinct VouType From Table_name Where Colum=1 order by VouType", connection))
{
vochcombox.Items.Clear();
connection.Open();
using (var dr = command.ExecuteReader())
{
while (dr.Read())
{
vochcombox.Items.Add(dr.GetInt32("VouType"));
}
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
Cursor = Cursors.Default;
}
}
"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer
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That error is telling you that he cannot convert DR object type to int.
DR type is SQLDataReader, you cannot convert data reader to int.
Why fill "vochcombox" twice?
While loop should work, but foreach doesn't for sure.
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I first learned C# then C. As I've been working in C a lot lately, I've had to do without classes obviously since it's not really an OOP language.
I've gotten rather accustomed to passing stuff in as arguments and I'm writing a C# program right now where I've been passing "state" around via the method arguments rather than the typical storing fields/properties on the class and then accessing them from the class methods. Is there anything "wrong" about doing this? Is there anything "wrong" with not using the constructor to initialize member variables to certain values and instead just using a function in the class that calls the other business functions? E.G.
someObject myObject = new someObject();
var processResult = myObject.process(someString,Processor_Option_1);
Instead of:
someObject myObject = new someObject(someString,Processor_Option_1);
var processResult = myObject.result;
Note: Option 2 also uses class state member variables whereas 1 just passes it function-to-function as argument.
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