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• C# Reflection StackTrack get value

  - by John

  I'm making pretty heavy use of reflection in my current project to greatly simplify communication between my controllers and the wcf services. What I want to do now is to obtain a value from the Session within an object that has no direct access to HttpSessionStateBase (IE: Not a controller). For example, a ViewModel. I could pass it in or pass a reference to it etc. but that is not optimal in my situation. Since everything comes from a Controller at some point in my scenario I can do the following to walk the sack to the controller where the call originated, pretty simple stuff: var trace = new System.Diagnostics.StackTrace(); foreach (var frame in trace.GetFrames()) { var type = frame.GetMethod().DeclaringType; var prop = type.GetProperty("Session"); if(prop != null) { // not sure about this part... var value = prop.GetValue(type, null); break; } } The trouble here is that I can't seem to work out how to get the "instance" of the controller or the Session property so that I can read from it.

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• Value is zero after filter SQL in C#

  - by Chuki2

  I`m new in C#.. I have write function to filter department. And this function will return idDepartment. New problem is, department keep value "System.Windows.Forms.Label, Text : ADMIN ", that`s why i got zero. So how can i take "ADMIN" only and keep to department? Update : public partial class frmEditStaff : Form { private string connString; private string userId, department; //Department parameter coming from here private string conString = "Datasource"; public frmEditStaff(string strUserID, string strPosition) { InitializeComponent(); //Pass value from frmListStaff to userID text box tbStaffId.Text = strUserID.ToString(); userId = strUserID.ToString(); department = strPosition.ToString(); } This code below is working, don`t have any problem. public int lookUpDepart() { int idDepart=0; using (SqlConnection openCon = new SqlConnection(conString)) { string lookUpDepartmenId = "SELECT idDepartment FROM tbl_department WHERE department = '" + department + "';"; openCon.Open(); using (SqlCommand querylookUpDepartmenId = new SqlCommand(lookUpDepartmenId, openCon)) { SqlDataReader read = querylookUpDepartmenId.ExecuteReader(); while (read.Read()) { idDepart = int.Parse(read[0].ToString()); break; } } openCon.Close(); return idDepart; } } Thanks for help. Happy nice day!

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• Second user-defined function returns garbage value?

  - by mintyfresh

  I have been teaching myself C programming, and I've come to a difficult point with using variables across functions. When, I compile this program and run it, the function askBirthYear returns the correct value, but sayAgeInYears returns either 0 or a garbage value. I believe it has something to do with how I used the variable birthYear, but I'm stumped on how to fix the issue. Here is the code: #include <stdio.h> #include <stdlib.h> int askBirthYear(int); void sayAgeInYears(int); int birthYear; int main(void) { askBirthYear(birthYear); sayAgeInYears(birthYear); return EXIT_SUCCESS; } void askBirthYear(int birthYear) { printf("Hello! In what year were you born?\n"); scanf("%d", &birthYear); printf("Your birth year is %d.\n", birthYear); return birthYear; } void sayAgeInYears(int birthYear) { int age; age = 2012 - birthYear; printf("You are %d years old.\n", age); }

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• Selecting value from array results

  - by Swodahs

  Being new to learning PHP I am having trouble with understanding how to select/echo/extract a value from array result a API script returns. Using the standard: echo "<pre>"; print_r($ups_rates->rates); echo "</pre>"; The results returned look like this: Array ( [0] => Array ( [code] => 03 [cost] => 19.58 [desc] => UPS Ground ) [1] => Array ( [code] => 12 [cost] => 41.69 [desc] => UPS 3 Day Select ) [2] => Array ( [code] => 02 [cost] => 59.90 [desc] => UPS 2nd Day Air ) ) If I am only needing to work with the values of the first array result: Code 3, 19.58, UPS Ground --- what is the correct way to echo one or more of those values? I thought: $test = $ups_rates[0][cost]; echo $test; This is obviously wrong and my lack of understanding the array results isn't improving, can someone please show me how I would echo an individual value of the returned array and/or assign it to a variable to echo the normal way?

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• How to display different value with ComboBoxTableCell?

  - by Philippe Jean

  I try to use ComboxBoxTableCell without success. The content of the cell display the right value for the attribute of an object. But when the combobox is displayed, all items are displayed with the toString object method and not the attribute. I tryed to override updateItem of ComboBoxTableCell or to provide a StringConverter but nothing works. Do you have some ideas to custom comboxbox list display in a table cell ? I put a short example below to see quickly the problem. Execute the app and click in the cell, you will see the combobox with toString value of the object. package javafx2; import javafx.application.Application; import javafx.beans.property.adapter.JavaBeanObjectPropertyBuilder; import javafx.beans.value.ObservableValue; import javafx.collections.FXCollections; import javafx.collections.ObservableList; import javafx.scene.Scene; import javafx.scene.control.TableCell; import javafx.scene.control.TableColumn; import javafx.scene.control.TableColumn.CellDataFeatures; import javafx.scene.control.TableView; import javafx.scene.control.cell.ComboBoxTableCell; import javafx.stage.Stage; import javafx.util.Callback; import javafx.util.StringConverter; public class ComboBoxTableCellTest extends Application { public class Product { private String name; public Product(String name) { this.name = name; } public String getName() { return name; } public void setName(String name) { this.name = name; } } public class Command { private Integer quantite; private Product product; public Command(Product product, Integer quantite) { this.product = product; this.quantite = quantite; } public Integer getQuantite() { return quantite; } public void setQuantite(Integer quantite) { this.quantite = quantite; } public Product getProduct() { return product; } public void setProduct(Product product) { this.product = product; } } public static void main(String[] args) { launch(args); } @Override public void start(Stage stage) throws Exception { Product p1 = new Product("Product 1"); Product p2 = new Product("Product 2"); final ObservableList<Product> products = FXCollections.observableArrayList(p1, p2); ObservableList<Command> commands = FXCollections.observableArrayList(new Command(p1, 20)); TableView<Command> tv = new TableView<Command>(); tv.setItems(commands); TableColumn<Command, Product> tc = new TableColumn<Command, Product>("Product"); tc.setMinWidth(140); tc.setCellValueFactory(new Callback<TableColumn.CellDataFeatures<Command,Product>, ObservableValue<Product>>() { @Override public ObservableValue<Product> call(CellDataFeatures<Command, Product> cdf) { try { JavaBeanObjectPropertyBuilder<Product> jbdpb = JavaBeanObjectPropertyBuilder.create(); jbdpb.bean(cdf.getValue()); jbdpb.name("product"); return (ObservableValue) jbdpb.build(); } catch (NoSuchMethodException e) { System.err.println(e.getMessage()); } return null; } }); final StringConverter<Product> converter = new StringConverter<ComboBoxTableCellTest.Product>() { @Override public String toString(Product p) { return p.getName(); } @Override public Product fromString(String s) { // TODO Auto-generated method stub return null; } }; tc.setCellFactory(new Callback<TableColumn<Command,Product>, TableCell<Command,Product>>() { @Override public TableCell<Command, Product> call(TableColumn<Command, Product> tc) { return new ComboBoxTableCell<Command, Product>(converter, products) { @Override public void updateItem(Product product, boolean empty) { super.updateItem(product, empty); if (product != null) { setText(product.getName()); } } }; } }); tv.getColumns().add(tc); tv.setEditable(true); Scene scene = new Scene(tv, 140, 200); stage.setScene(scene); stage.show(); } }

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• Retrieving XML node from a path specified in an attribute value of another node

  - by Olivier PAYEN

  From this XML source : <?xml version="1.0" encoding="utf-8" ?> <ROOT> <STRUCT> <COL order="1" nodeName="FOO/BAR" colName="Foo Bar" /> <COL order="2" nodeName="FIZZ" colName="Fizz" /> </STRUCT> <DATASET> <DATA> <FIZZ>testFizz</FIZZ> <FOO> <BAR>testBar</BAR> <LIB>testLib</LIB> </FOO> </DATA> <DATA> <FIZZ>testFizz2</FIZZ> <FOO> <BAR>testBar2</BAR> <LIB>testLib2</LIB> </FOO> </DATA> </DATASET> </ROOT> I want to generate this HTML : <html> <head> <title>Test</title> </head> <body> <table border="1"> <tr> <td>Foo Bar</td> <td>Fizz</td> </tr> <tr> <td>testBar</td> <td>testFizz</td> </tr> <tr> <td>testBar2</td> <td>testFizz2</td> </tr> </table> </body> </html> Here is the XSLT I currently have : <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" exclude-result-prefixes="msxsl"> <xsl:output method="html" indent="yes"/> <xsl:template match="/ROOT"> <html> <head> <title>Test</title> </head> <body> <table border="1"> <tr> <!--Generate the table header--> <xsl:apply-templates select="STRUCT/COL"> <xsl:sort data-type="number" select="@order"/> </xsl:apply-templates> </tr> <xsl:apply-templates select="DATASET/DATA" /> </table> </body> </html> </xsl:template> <xsl:template match="COL"> <!--Template for generating the table header--> <td> <xsl:value-of select="@colName"/> </td> </xsl:template> <xsl:template match="DATA"> <xsl:variable name="pos" select="position()" /> <tr> <xsl:for-each select="/ROOT/STRUCT/COL"> <xsl:sort data-type="number" select="@order"/> <xsl:variable name="elementName" select="@nodeName" /> <td> <xsl:value-of select="/ROOT/DATASET/DATA[$pos]/*[name() = $elementName]" /> </td> </xsl:for-each> </tr> </xsl:template> </xsl:stylesheet> It almost works, the problem I have is to retrieve the correct DATA node from the path specified in the "nodeName" attribute value of the STRUCT block.

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• Decryption Key value not match

  - by Jitendra Jadav

  public class TrippleENCRSPDESCSP { public TrippleENCRSPDESCSP() { } public void EncryptIt(string sData,ref byte[] sEncData,ref byte[] Key1,ref byte[] Key2) { try { // Create a new TripleDESCryptoServiceProvider object // to generate a key and initialization vector (IV). TripleDESCryptoServiceProvider tDESalg = new TripleDESCryptoServiceProvider(); // Create a string to encrypt. // Encrypt the string to an in-memory buffer. byte[] Data = EncryptTextToMemory(sData,tDESalg.Key,tDESalg.IV); sEncData = Data; Key1 = tDESalg.Key; Key2 = tDESalg.IV; } catch (Exception) { throw; } } public string DecryptIt(byte[] sEncData) { //byte[] toEncrypt = new ASCIIEncoding().GetBytes(sEncData); //XElement xParser = null; //XmlDocument xDoc = new XmlDocument(); try { //string Final = ""; string sPwd = null; string sKey1 = null; string sKey2 = null; //System.Text.ASCIIEncoding encoding = new System.Text.ASCIIEncoding(); string soutxml = ""; //soutxml = encoding.GetString(sEncData); soutxml = ASCIIEncoding.ASCII.GetString(sEncData); sPwd = soutxml.Substring(18, soutxml.LastIndexOf("</EncPwd>") - 18); sKey1 = soutxml.Substring(18 + sPwd.Length + 15, soutxml.LastIndexOf("</Key1>") - (18 + sPwd.Length + 15)); sKey2 = soutxml.Substring(18 + sPwd.Length + 15 + sKey1.Length + 13, soutxml.LastIndexOf("</Key2>") - (18 + sPwd.Length + 15 + sKey1.Length + 13)); //xDoc.LoadXml(soutxml); //xParser = XElement.Parse(soutxml); //IEnumerable<XElement> elemsValidations = // from el in xParser.Elements("EmailPwd") // select el; #region OldCode //XmlNodeList objXmlNode = xDoc.SelectNodes("EmailPwd"); //foreach (XmlNode xmllist in objXmlNode) //{ // XmlNode xmlsubnode; // xmlsubnode = xmllist.SelectSingleNode("EncPwd"); // xmlsubnode = xmllist.SelectSingleNode("Key1"); // xmlsubnode = xmllist.SelectSingleNode("Key2"); //} #endregion //foreach (XElement elemValidation in elemsValidations) //{ // sPwd = elemValidation.Element("EncPwd").Value; // sKey1 = elemValidation.Element("Key1").Value; // sKey2 = elemValidation.Element("Key2").Value; //} //byte[] Key1 = encoding.GetBytes(sKey1); //byte[] Key2 = encoding.GetBytes(sKey2); //byte[] Data = encoding.GetBytes(sPwd); byte[] Key1 = ASCIIEncoding.ASCII.GetBytes(sKey1); byte[] Key2 = ASCIIEncoding.ASCII.GetBytes(sKey2); byte[] Data = ASCIIEncoding.ASCII.GetBytes(sPwd); // Decrypt the buffer back to a string. string Final = DecryptTextFromMemory(Data, Key1, Key2); return Final; } catch (Exception) { throw; } } public static byte[] EncryptTextToMemory(string Data,byte[] Key,byte[] IV) { try { // Create a MemoryStream. MemoryStream mStream = new MemoryStream(); // Create a CryptoStream using the MemoryStream // and the passed key and initialization vector (IV). CryptoStream cStream = new CryptoStream(mStream, new TripleDESCryptoServiceProvider().CreateEncryptor(Key, IV), CryptoStreamMode.Write); // Convert the passed string to a byte array. //byte[] toEncrypt = new ASCIIEncoding().GetBytes(Data); byte[] toEncrypt = ASCIIEncoding.ASCII.GetBytes(Data); // Write the byte array to the crypto stream and flush it. cStream.Write(toEncrypt, 0, toEncrypt.Length); cStream.FlushFinalBlock(); // Get an array of bytes from the // MemoryStream that holds the // encrypted data. byte[] ret = mStream.ToArray(); // Close the streams. cStream.Close(); mStream.Close(); // Return the encrypted buffer. return ret; } catch (CryptographicException e) { MessageBox.Show("A Cryptographic error occurred: {0}", e.Message); return null; } } public static string DecryptTextFromMemory(byte[] Data, byte[] Key, byte[] IV) { try { // Create a new MemoryStream using the passed // array of encrypted data. MemoryStream msDecrypt = new MemoryStream(Data); // Create a CryptoStream using the MemoryStream // and the passed key and initialization vector (IV). CryptoStream csDecrypt = new CryptoStream(msDecrypt, new TripleDESCryptoServiceProvider().CreateDecryptor(Key, IV), CryptoStreamMode.Write); csDecrypt.Write(Data, 0, Data.Length); //csDecrypt.FlushFinalBlock(); msDecrypt.Position = 0; // Create buffer to hold the decrypted data. byte[] fromEncrypt = new byte[msDecrypt.Length]; // Read the decrypted data out of the crypto stream // and place it into the temporary buffer. msDecrypt.Read(fromEncrypt, 0, msDecrypt.ToArray().Length); //csDecrypt.Close(); MessageBox.Show(ASCIIEncoding.ASCII.GetString(fromEncrypt)); //Convert the buffer into a string and return it. return new ASCIIEncoding().GetString(fromEncrypt); } catch (CryptographicException e) { MessageBox.Show("A Cryptographic error occurred: {0}", e.Message); return null; } } }

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• Value cannot be null, ArgumentNullException

  - by Wooolie

  I am currently trying to return an array which contains information about a seat at a theate such as Seat number, Name, Price and Status. I am using a combobox where I want to list all vacant or reserved seats based upon choice. When I choose reserved seats in my combobox, I call upon a method using AddRange. This method is supposed to loop through an array containing all seats and their information. If a seat is Vacant, I add it to an array. When all is done, I return this array. However, I am dealing with a ArgumentNullException. MainForm namespace Assignment4 { public partial class MainForm : Form { // private const int totNumberOfSeats = 240; private SeatManager seatMngr; private const int columns = 10; private const int rows = 10; public enum DisplayOptions { AllSeats, VacantSeats, ReservedSeats } public MainForm() { InitializeComponent(); seatMngr = new SeatManager(rows, columns); InitializeGUI(); } /// <summary> /// Fill the listbox with information from the beginning, /// let the user be able to choose from vacant seats. /// </summary> private void InitializeGUI() { rbReserve.Checked = true; txtName.Text = string.Empty; txtPrice.Text = string.Empty; lblTotalSeats.Text = seatMngr.GetNumOfSeats().ToString(); cmbOptions.Items.AddRange(Enum.GetNames(typeof(DisplayOptions))); cmbOptions.SelectedIndex = 0; UpdateGUI(); } /// <summary> /// call on methods ValidateName and ValidatePrice with arguments /// </summary> /// <param name="name"></param> /// <param name="price"></param> /// <returns></returns> private bool ValidateInput(out string name, out double price) { bool nameOK = ValidateName(out name); bool priceOK = ValidatePrice(out price); return nameOK && priceOK; } /// <summary> /// Validate name using inputUtility, show error if input is invalid /// </summary> /// <param name="name"></param> /// <returns></returns> private bool ValidateName(out string name) { name = txtName.Text.Trim(); if (!InputUtility.ValidateString(name)) { //inform user MessageBox.Show("Input of name is Invalid. It can not be empty, " + Environment.NewLine + "and must have at least one character.", " Error!"); txtName.Focus(); txtName.Text = " "; txtName.SelectAll(); return false; } return true; } /// <summary> /// Validate price using inputUtility, show error if input is invalid /// </summary> /// <param name="price"></param> /// <returns></returns> private bool ValidatePrice(out double price) { // show error if input is invalid if (!InputUtility.GetDouble(txtPrice.Text.Trim(), out price, 0)) { //inform user MessageBox.Show("Input of price is Invalid. It can not be less than 0, " + Environment.NewLine + "and must not be empty.", " Error!"); txtPrice.Focus(); txtPrice.Text = " "; txtPrice.SelectAll(); return false; } return true; } /// <summary> /// Check if item is selected in listbox /// </summary> /// <returns></returns> private bool CheckSelectedIndex() { int index = lbSeats.SelectedIndex; if (index < 0) { MessageBox.Show("Please select an item in the box"); return false; } else return true; } /// <summary> /// Call method ReserveOrCancelSeat when button OK is clicked /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void btnOK_Click(object sender, EventArgs e) { ReserveOrCancelSeat(); } /// <summary> /// Reserve or cancel seat depending on choice the user makes. Update GUI after choice. /// </summary> private void ReserveOrCancelSeat() { if (CheckSelectedIndex() == true) { string name = string.Empty; double price = 0.0; int selectedSeat = lbSeats.SelectedIndex; bool reserve = false; bool cancel = false; if (rbReserve.Checked) { DialogResult result = MessageBox.Show("Do you want to continue?", "Approve", MessageBoxButtons.YesNo); if (result == DialogResult.Yes) { if (ValidateInput(out name, out price)) { reserve = seatMngr.ReserveSeat(name, price, selectedSeat); if (reserve == true) { MessageBox.Show("Seat has been reserved"); UpdateGUI(); } else { MessageBox.Show("Seat has already been reserved"); } } } } else { DialogResult result = MessageBox.Show("Do you want to continue?", "Approve", MessageBoxButtons.YesNo); if (result == DialogResult.Yes) { cancel = seatMngr.CancelSeat(selectedSeat); if (cancel == true) { MessageBox.Show("Seat has been cancelled"); UpdateGUI(); } else { MessageBox.Show("Seat is already vacant"); } } } UpdateGUI(); } } /// <summary> /// Update GUI with new information. /// </summary> /// <param name="customerName"></param> /// <param name="price"></param> private void UpdateGUI() { lbSeats.Items.Clear(); lbSeats.Items.AddRange(seatMngr.GetSeatInfoString()); lblVacantSeats.Text = seatMngr.GetNumOfVacant().ToString(); lblReservedSeats.Text = seatMngr.GetNumOfReserved().ToString(); if (rbReserve.Checked) { txtName.Text = string.Empty; txtPrice.Text = string.Empty; } } /// <summary> /// set textboxes to false if cancel reservation button is checked /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void rbCancel_CheckedChanged_1(object sender, EventArgs e) { txtName.Enabled = false; txtPrice.Enabled = false; } /// <summary> /// set textboxes to true if reserved radiobutton is checked /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void rbReserve_CheckedChanged_1(object sender, EventArgs e) { txtName.Enabled = true; txtPrice.Enabled = true; } /// <summary> /// Make necessary changes on the list depending on what choice the user makes. Show only /// what the user wants to see, whether its all seats, reserved seats or vacant seats only. /// </summary> /// <param name="sender"></param> /// <param name="e"></param> private void cmbOptions_SelectedIndexChanged(object sender, EventArgs e) { if (cmbOptions.SelectedIndex == 0 && rbReserve.Checked) //All seats visible. { UpdateGUI(); txtName.Enabled = true; txtPrice.Enabled = true; btnOK.Enabled = true; } else if (cmbOptions.SelectedIndex == 0 && rbCancel.Checked) { UpdateGUI(); txtName.Enabled = false; txtPrice.Enabled = false; btnOK.Enabled = true; } else if (cmbOptions.SelectedIndex == 1) //Only vacant seats visible. { lbSeats.Items.Clear(); lbSeats.Items.AddRange(seatMngr.ReturnVacantSeats()); // Value cannot be null txtName.Enabled = false; txtPrice.Enabled = false; btnOK.Enabled = false; } else if (cmbOptions.SelectedIndex == 2) //Only reserved seats visible. { lbSeats.Items.Clear(); lbSeats.Items.AddRange(seatMngr.ReturnReservedSeats()); // Value cannot be null txtName.Enabled = false; txtPrice.Enabled = false; btnOK.Enabled = false; } } } } SeatManager namespace Assignment4 { class SeatManager { private string[,] nameList = null; private double[,] priceList = null; private string[,] seatList = null; private readonly int totCols; private readonly int totRows; /// <summary> /// Constructor with declarations of size for all arrays. /// </summary> /// <param name="totNumberOfSeats"></param> public SeatManager(int row, int cols) { totCols = cols; totRows = row; nameList = new string[row, cols]; priceList = new double[row, cols]; seatList = new string[row, cols]; for (int rows = 0; rows < row; rows++) { for (int col = 0; col < totCols; col++) { seatList[rows, col] = "Vacant"; } } } /// <summary> /// Check if index is within bounds of the array /// </summary> /// <param name="index"></param> /// <returns></returns> private bool CheckIndex(int index) { if (index >= 0 && index < nameList.Length) return true; else return false; } /// <summary> /// Return total number of seats /// </summary> /// <returns></returns> public int GetNumOfSeats() { int count = 0; for (int rows = 0; rows < totRows; rows++) { for (int cols = 0; cols < totCols; cols++) { count++; } } return count; } /// <summary> /// Calculate and return total number of reserved seats /// </summary> /// <returns></returns> public int GetNumOfReserved() { int totReservedSeats = 0; for (int rows = 0; rows < totRows; rows++) { for (int col = 0; col < totCols; col++) { if (!string.IsNullOrEmpty(nameList[rows, col])) { totReservedSeats++; } } } return totReservedSeats; } /// <summary> /// Calculate and return total number of vacant seats /// </summary> /// <returns></returns> public int GetNumOfVacant() { int totVacantSeats = 0; for (int rows = 0; rows < totRows; rows++) { for (int col = 0; col < totCols; col++) { if (string.IsNullOrEmpty(nameList[rows, col])) { totVacantSeats++; } } } return totVacantSeats; } /// <summary> /// Return formated string with info about the seat, name, price and its status /// </summary> /// <param name="index"></param> /// <returns></returns> public string GetSeatInfoAt(int index) { int cols = ReturnColumn(index); int rows = ReturnRow(index); string strOut = string.Format("{0,2} {1,10} {2,17} {3,20} {4,35:f2}", rows+1, cols+1, seatList[rows, cols], nameList[rows, cols], priceList[rows, cols]); return strOut; } /// <summary> /// Send an array containing all seats in the cinema /// </summary> /// <returns></returns> public string[] GetSeatInfoString() { int count = totRows * totCols; if (count <= 0) return null; string[] strSeatInfoStrings = new string[count]; for (int i = 0; i < totRows * totCols; i++) { strSeatInfoStrings[i] = GetSeatInfoAt(i); } return strSeatInfoStrings; } /// <summary> /// Reserve seat if seat is vacant /// </summary> /// <param name="name"></param> /// <param name="price"></param> /// <param name="index"></param> /// <returns></returns> public bool ReserveSeat(string name, double price, int index) { int cols = ReturnColumn(index); int rows = ReturnRow(index); if (string.IsNullOrEmpty(nameList[rows, cols])) { nameList[rows, cols] = name; priceList[rows, cols] = price; seatList[rows, cols] = "Reserved"; return true; } else return false; } public string[] ReturnVacantSeats() { int totVacantSeats = int.Parse(GetNumOfVacant().ToString()); string[] vacantSeats = new string[totVacantSeats]; for (int i = 0; i < vacantSeats.Length; i++) { if (GetSeatInfoAt(i) == "Vacant") { vacantSeats[i] = GetSeatInfoAt(i); } } return vacantSeats; } public string[] ReturnReservedSeats() { int totReservedSeats = int.Parse(GetNumOfReserved().ToString()); string[] reservedSeats = new string[totReservedSeats]; for (int i = 0; i < reservedSeats.Length; i++) { if (GetSeatInfoAt(i) == "Reserved") { reservedSeats[i] = GetSeatInfoAt(i); } } return reservedSeats; } /// <summary> /// Cancel seat if seat is reserved /// </summary> /// <param name="index"></param> /// <returns></returns> public bool CancelSeat(int index) { int cols = ReturnColumn(index); int rows = ReturnRow(index); if (!string.IsNullOrEmpty(nameList[rows, cols])) { nameList[rows, cols] = ""; priceList[rows, cols] = 0.0; seatList[rows, cols] = "Vacant"; return true; } else { return false; } } /// <summary> /// Convert index to row and return value /// </summary> /// <param name="index"></param> /// <returns></returns> public int ReturnRow(int index) { int vectorRow = index; int row; row = (int)Math.Ceiling((double)(vectorRow / totCols)); return row; } /// <summary> /// Convert index to column and return value /// </summary> /// <param name="index"></param> /// <returns></returns> public int ReturnColumn(int index) { int row = index; int col = row % totCols; return col; } } } In MainForm, this is where I get ArgumentNullException: lbSeats.Items.AddRange(seatMngr.ReturnVacantSeats()); And this is the method where the array is to be returned containing all vacant seats: public string[] ReturnVacantSeats() { int totVacantSeats = int.Parse(GetNumOfVacant().ToString()); string[] vacantSeats = new string[totVacantSeats]; for (int i = 0; i < vacantSeats.Length; i++) { if (GetSeatInfoAt(i) == "Vacant") { vacantSeats[i] = GetSeatInfoAt(i); } } return vacantSeats; }

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• How can I write javaScript cookies to keep the data persistent after page reloads on my form?

  - by Johhny Thero

  Hello, I am trying to learn how to write cookies to keep the data in my CookieButton1 button persistent and to survive refreshes and page reloads. How can I do this in JavaScript? I have supplied my source code. Any advise, links or tutorials will be very helpful. If you navigate to http://iqlusion.net/test.html and click on Empty1, it will start to ask you questions. When finished it stores everything into CookieButton1. But when I refresh my browser the data resets and goes away. Thanks! <html> <head> <title>no_cookies> </head> <script type="text/javascript" > var Can1Set = "false"; function Can1() { if (Can1Set == "false") { Can1Title = prompt("What do you want to name this new canned response?",""); Can1State = prompt("Enter a ticket state (open or closed)","closed"); Can1Response = prompt("Enter the canned response:",""); Can1Points = prompt("What point percentage do you want to assign? (0-10)","2.5"); // Set the "Empty 1" button text to the new name the user specified document.CookieTest.CookieButton1.value = Can1Title; // Set the cookie here, and then set the Can1Set variable to true document.CookieTest.CookieButton1 = "CookieButton1"; Can1Set = true; }else{ document.TestForm.TestStateDropDownBox.value = Can1State; document.TestForm.TestPointsDropDownBox.value = Can1Points; document.TestForm.TestTextArea.value = Can1Response; // document.TestForm.submit(); } } </script> <form name=TestForm> State: <select name=TestStateDropDownBox> <option value=new selected>New</option> <option value=open selected>Open</option> <option value=closed>Closed</option> </select> Points: <select name=TestPointsDropDownBox> <option value=1>1</option> <option value=1.5>1.5</option> <option value=2>2</option> <option value=2.5>2.5</option> <option value=3>3</option> <option value=3.5>3.5</option> <option value=4>4</option> <option value=4.5>4.5</option> <option value=5>5</option> <option value=5.5>5.5</option> <option value=6>6</option> <option value=6.5>6.5</option> <option value=7>7</option> <option value=7.5>7.5</option> <option value=8>8</option> <option value=8.5>8.5</option> <option value=9>9</option> <option value=9.5>9.5</option> <option value=10>10</option> </select> <p> Ticket information:<br> <textarea name=TestTextArea cols=50 rows=7></textarea> </form> <form name=CookieTest> <input type=button name=CookieButton1 value="Empty 1" onClick="javascript:Can1()"> </form>

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• ASP.NET MVC Html.DropDownListFor Select value

  - by user295541

  Hi, I have a little problem. I use the Html.DropDownListFor helper to render a dropdown list to the client. But I can't set the selected value in dropdown list. <%= Html.DropDownListFor(model = Model.CalculationClassCollection, new SelectList(Model.CalculationClassCollection, "ID", "Name", 3 ), new { id = "ddCalculationClass" })% Anybody can help me?

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• Kendo UI Combo Box Reset Value

  - by ciantrius

  I'm using the Kendo UI ComboBoxes in cascade mode to build up a filter that I wish to apply. How do I clear/reset the value of a Kendo UI ComboBox? I've tried: $("#comboBox").data("kendoComboBox").val(''); $("#comboBox").data("kendoComboBox").select(''); $("#comboBox").data("kendoComboBox").select(null); all to no avail. The project is an MVC4 app using the Razor engine and the code is basically the same as the Kendo UI example.

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• How to pass value from wpf form to wpf user control

  - by deepak

  Hai am having a WPF user control in my WPF Form, when i click my button in my form , i just want to pass some value to the textbox which is in the usercontrol, tell me how to do this.

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• jqGrid Filter Toolbar initial default value

  - by Paul Creasey

  I'm using jqGrid with the filter toolbar, i need to set an initial default filter value to one of the fields so that only rows with status 'Open' are displayed by default, but the user can display Closed rows if desired. At the moment i have a workaround like this setTimeout(function() {$('#gs_Status').val('Open');$("#eventsGrid")[0].triggerToolbar()},500); but it results in a second request and is pretty bad really. Does anybody know how to do this?

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• PowerShell - Parameter Value Tab Expansion for Enum types

  - by Adam Driscoll

  Is it possible to implement parameter value tab expansion for enum parameter types? Creating a binary cmdlet with parameter definition: [Parameter] public SomeEnum Type {get;set;} Is there some way to type: Add-MyThing -Type S<tab> To get: Add-MyThing -Type SomeEnumValue Where: public enum SomeEnum { SomeEnumValue, SomeEnumValue2 } I know it may be possible with overriding the TabExpansion function but I was wondering if there was something I could do within my cmdlet to expose this type of functionality.

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• The ':' character, hexadecimal value 0x3A, cannot be included in a name

  - by coure06

  I have an xml file that contains its element like <ab:test>Str</ab:test> When i am trying to access it using the code XElement tempElement = doc.Descendants(XName.Get("ab:test")).FirstOrDefault(); Its giving me error System.Web.Services.Protocols.SoapException: Server was unable to process request. --- System.Xml.XmlException: The ':' character, hexadecimal value 0x3A, cannot be included in a name. How shld i access it?

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• Update primary key value using entity framework

  - by lemkepf

  I'm trying to update one value of a compound primary key from within the entity framework and I'm getting this error: "The property 'CustomerID' is part of the object's key information and cannot be modified. " Here is my code: Dim customer As Customer = (From c In db.Customer Where c.CustomerID = "xxx" AndAlso c.SiteKey = siteKey).FirstOrDefault customer.CustomerID = "fasdfasdf" db.SaveChanges() It seems too simple. Is it true you can't update a primary key within the entity framework? I can't find any documentation on the topic. Thanks!

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• Get specifc value from JSon string using JSon.Net

  - by dean nolan

  I am trying to get a value from a JSon formatted string. It was to get album info from a website called Freebase. My result is like this: { "a0": { "code": "/api/status/error", "messages": [ { "code": "/api/status/error/mql/result", "info": { "count": 20, "result": [ { "album": [ { "name": "Definitely Maybe", "release_date": "1994-08-30" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Most Wanted Rock 1", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Alternative 90s", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Live Forever: Best of Britpop", "release_date": "2003-03-03" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "The Best... In the World... Ever! Volume 5", "release_date": "1997-03-31" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Live 4 Ever", "release_date": "1998-06-29" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "De Afrekening, Volume 8", "release_date": "1994" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Now That's What I Call Music! 33", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Q: Anthems", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "The Best Anthems... Ever! Volume 2", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "1995 Mercury Music Prize: Ten Albums of the Year", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Now That's What I Call Music! 1994", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Indie Top 20, Volume 21", "release_date": "1995" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Dad Rocks!", "release_date": "2006-06-05" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Untitled", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "The Greatest Hits of 1994", "release_date": "1994-10" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Top of the Pops 2", "release_date": "2000-03-27" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Q: Anthems (disc 1)", "release_date": null } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Jamie Oliver's Cookin'", "release_date": "2001" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" }, { "album": [ { "name": "Killer Buzz", "release_date": "2001" } ], "artist": "Oasis", "name": "Live Forever", "type": "/music/track" } ] }, "message": "Unique query may have at most one result. Got 20", "path": "", "query": { "album": [ { "name": null, "release_date": null, "sort": "release_date" } ], "artist": "Oasis", "error_inside": ".", "name": "Live Forever", "type": "/music/track" } } ] }, "code": "/api/status/ok", "status": "200 OK", "transaction_id": "cache;cache04.p01.sjc1:8101;2010-03-30T18:04:20Z;0035" } I am looking to get the first album title, Definitely Maybe, from this list. I have tried parsing the string like this: JObject o = JObject.Parse(jsonString); string album = (string)o[""]; But no matter what I have tried I don't know what to put in those quotes. How would I get this specific value or be able to search for it? Thanks

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• PayPal Cannot send value to paypal

  - by preetu

  Hi PayPal IPN sends a notification to your script directly. Since the notification is coming from PayPal - NOT the customer that placed the order - My Login session doesn't exits this context .Therefore,all my login data doesn't exist in the session.I need my login session values to update my DB with paypal ipn value.How should i mentain my login session should i set browser session or other way can i send login primary key to paypal.

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• push new value to mongodb inner array - mongodb/php

  - by Rizky Ramadhan

  hi i have this document in mongo: { "_id": ObjectId("4d0b9c7a8b012fe287547157"), "done_by": ["1"] } and i want to add another value to "done_by" field, so my expected document will be:: { "_id": ObjectId("4d0b9c7a8b012fe287547157"), "done_by": ["1","2","3"] } i try this: $conn = new Mongo(); $q = $conn->server->gameQueue; $id = new MongoId("4d0b9c7a8b012fe287547157"); $q->update(array("_id"=>$id),array('$push' => array("done_by","2"))); but nothing happens, anyone know how to do this?

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• telrik radwindow : Value does not fall within the expected range

  - by raksham

  I have two user controls that contain the telrik radwindow. When I try to open second window on first window button click, I get the exception: "Value does not fall within the expected range".

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• Dumping out Value on console using jQuery

  - by Rachel

  Hello, I come from PHP background and am used to doing var_dump, echo and print_r while doing some kind of debugging. I have just started on jquery, today is my first day infact and am trying to see if there is a way to dump out value to firebug console. Do we have similar function to var_dump or echo in jQuery or any other way to get values or debug statements displayed on the console ?

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• How do you Send More that 20 Parameters to a Stored Procedure Using ODP.Net?

  - by discwiz

  Switching from Microsofts Oracle Driver to ODP.NET version 10.2.0.100. After changing the data types to OracleDBTypes in a procedure, that worked perficetly using System.Data.OracleClient, the procedure fails if we try and pass in more that 20 parameters. The error returned is: ORA-06550: line 1, column 7: PLS-00306: wrong number or types of arguments in call to 'ADD_TARP_EVENT' ORA-06550: line 1, column 7: PL/SQL: Statement ignorede If we reduce the number of parameters to less than 20 it works. Is this a known issue? Thanks, Dave Here the code for creating the parameters: Shared Function CreateTarpEventCommand(ByVal aTarpEvent As TARPEventType) As OracleCommand Dim cmd As New OracleCommand With aTarpEvent cmd.Parameters.Add(New OracleParameter("I_facID_C", OracleDbType.Char)).Value = .FacilityShortName cmd.Parameters.Add(New OracleParameter("I_facName_VC", OracleDbType.Varchar2)).Value = .FacilityLongName cmd.Parameters.Add(New OracleParameter("I_client_VC", OracleDbType.Varchar2)).Value = .ComputerNameTarpIsRunningOn cmd.Parameters.Add(New OracleParameter("I_TARP_Version_VC", OracleDbType.Varchar2)).Value = .TarpVersionNumber cmd.Parameters.Add(New OracleParameter("I_NAS_Type_VC", OracleDbType.Varchar2)).Value = .FacilityNASSystemType cmd.Parameters.Add(New OracleParameter("I_Aircraft1_Callsign_VC", OracleDbType.Varchar2)).Value = .Aircraft1Callsign If .Aircraft1Type Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft1_Type_VC", OracleDbType.Varchar2)).Value = .Aircraft1Type End If If .Aircraft1Category Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft1_Cat_VC", OracleDbType.Varchar2)).Value = .Aircraft1Category End If cmd.Parameters.Add(New OracleParameter("I_Aircraft2_Callsign_VC", OracleDbType.Varchar2)).Value = .Aircraft2Callsign If .Aircraft2Type Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft2_Type_VC", OracleDbType.Varchar2)).Value = .Aircraft2Type End If If .Aircraft2Category Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Aircraft2_Cat_VC", OracleDbType.Varchar2)).Value = .Aircraft2Category End If If .SensorShortName Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Sensor_Name_VC", OracleDbType.Varchar2)).Value = .SensorShortName End If If .TarpConfigurationName Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_TARP_Config_Name_VC", OracleDbType.Varchar2)).Value = .TarpConfigurationName End If If .EntryCreatorID Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Create_VC", OracleDbType.Varchar2)).Value = .EntryCreatorID End If If .LogAction Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Log_Action_VC", OracleDbType.Varchar2)).Value = .LogAction End If cmd.Parameters.Add(New OracleParameter("I_TARP_Mode_VC", OracleDbType.Varchar2)).Value = .TarpOperatingMode cmd.Parameters.Add(New OracleParameter("I_Min_Loss_N", OracleDbType.Decimal)).Value = .ClosestMeasureOfLoSS If .MapName Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_MAP_NAME_VC", OracleDbType.Varchar2)).Value = .MapName End If If .TarpConfigurationFileHash Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_CONFIG_HASH_VC", OracleDbType.Varchar2)).Value = .TarpConfigurationFileHash End If Dim aDate As OracleDate = CType(.LossEventsMessages(0).LossEventTime, System.DateTime) cmd.Parameters.Add(New OracleParameter("I_FIRST_LOSS_EVENT_DATE", OracleDbType.Date)).Value = aDate cmd.Parameters.Add(New OracleParameter("I_FIRST_LOSS_EVENT_MS_N", OracleDbType.Int32)).Value = .LossEventsMessages(0).LossEventMilliSeconds If .ZippedMapFiles Is Nothing Then cmd.Parameters.Add(New OracleParameter("I_Map_File_BL", OracleDbType.Blob)).Value = .ZippedMapFiles End If cmd.Parameters.Add(New OracleParameter("I_TARP_Package_BL", OracleDbType.Blob)).Value = .ZippedTarpPackageWithoutMaps cmd.Parameters.Add(New OracleParameter("rs_RESULTS", OracleDbType.RefCursor)).Direction = ParameterDirection.Output End With Return cmd End Function And here is the code for executing the procedure: Dim workingDataSet As New DataSet Dim oracleConnection As New OracleConnection Dim cmd As New OracleCommand Dim oracleDataAdapter As New OracleDataAdapter Try Using oracleConnection oracleConnection.ConnectionString = System.Configuration.ConfigurationManager.AppSettings("MasterConnectionODT") cmd = HelperDB.CreateTarpEventCommand(TarpEvent) cmd.Connection = oracleConnection cmd.CommandText = "LOADER.ADD_TARP_EVENT" cmd.CommandType = CommandType.StoredProcedure Using oracleConnection oracleConnection.Open() Dim aTransation As OracleTransaction = oracleConnection.BeginTransaction(IsolationLevel.ReadCommitted) Try Using oracleDataAdapter oracleDataAdapter = New OracleDataAdapter(cmd) oracleDataAdapter.TableMappings.Add("Results", "rs_Max") oracleDataAdapter.Fill(workingDataSet) ....

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• Swapping two variable value without using 3rd variable

  - by Muhammad Akhtar

  One of the very tricky question asked in an interview... we need to swap the values of two variables like a=10 and b=15 Generaly to swap two variables values, we need 3rd variable like.. temp=a a=b b=temp Now the requirement is, swaping value of two variable values without using 3rd variable? How can be accopmplish this?

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• combobox value string to int

  - by asli

  Hi,I have a question about converting types each other.I want to change the selected combobox value string to int but I get errors my code: int.Parse(age.SelectedItem.ToString()); What can I do for this problem?Thank you

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• Extract parameter value from url using regular expressions

  - by Oscar Reyes

  This should be very simple ( when you know the answer ). From this question I want to give it a try to the posted solution. And my question is: How to get the parameter value of a given url using javascript regexp? I have: http://www.youtube.com/watch?v=Ahg6qcgoay4 I need: Ahg6qcgoay4 I tried: http://www.youtube.com/watch\\?v=(w{11}) But: I suck...

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