asked on

Convertion from VB to C#

Can somebody please convert following code to C#?

''' <summary>
''' This page allows for classes to have seats deducted from it
''' </summary>
''' <remarks></remarks>
Partial Class _Default
Inherits System.Web.UI.Page

Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

' if first load then setup classes
If Not Page.IsPostBack Then

InitialiseClasses()
UpdateLabels()

End If
End Sub

''' <summary>
''' Initialises the Class Arrays based on parameters passed
''' </summary>
''' <param name="ClassSizes">The Size of the Classes</param>
''' <param name="AmountofClasses">The Amount of Classes to Create</param>
''' <remarks></remarks>
Private Sub InitialiseClasses(Optional ByVal ClassSizes As Integer = 15, Optional ByVal AmountofClasses As Integer = 3)
Dim TheClasses As New ArrayList()
Dim i As Integer

' For the Amount of Classes Specified
For i = 1 To AmountofClasses
' Add an integer of size ClassSizes to the ArrayList
TheClasses.Add(ClassSizes)
Next

' Add the Classes Arraylist to the Session
Session("Classes") = TheClasses

' Create an Arraylist of the size of ClassSizes and bind it to the Radio List
radSeatsAvailable.DataSource = PopulateArrayList(ClassSizes)
radSeatsAvailable.DataBind()
End Sub

''' <summary>
''' Creates and returns an array list of 1 to the specified size
''' </summary>
''' <param name="ArrayListLength">The Size of the ArrayList</param>
''' <returns>ArrayList of integers from 1 to ArrayListLength</returns>
''' <remarks></remarks>
Private Function PopulateArrayList(ByVal ArrayListLength As Integer) As ArrayList
Dim myarray As New ArrayList
Dim i As Integer

' For the size of the arraylist
For i = 1 To ArrayListLength
' Add an integer of the value i
myarray.Add(i)
Next

Return myarray

End Function

''' <summary>
''' Resets the radiolist when the dropdownlist with classes is changed
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
Protected Sub ddlClass_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlClass.SelectedIndexChanged

' ReBind the radiolist based on the amount of seats left in the class
radSeatsAvailable.DataSource = PopulateArrayList(Session("classes").Item(ddlClass.SelectedIndex).ToString)
radSeatsAvailable.DataBind()

UpdateLabels()

End Sub

''' <summary>
''' On Click update the amount of seats left in the class
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
Protected Sub btnRegister_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnRegister.Click

' Deduct the amount of seats based on the radio button selected
Session("classes").Item(ddlClass.SelectedIndex) = Session("classes").Item(ddlClass.SelectedIndex) - radSeatsAvailable.SelectedIndex - 1

' Bind the new amount of seats left
radSeatsAvailable.DataSource = PopulateArrayList(Session("classes").Item(ddlClass.SelectedIndex).ToString)
radSeatsAvailable.DataBind()

UpdateLabels()

End Sub

''' <summary>
''' Updates the labels for user feedback
''' </summary>
''' <remarks></remarks>
Private Sub UpdateLabels()
lblClass1.Text = Session("classes").Item(0).ToString
lblClass2.Text = Session("classes").Item(1).ToString
lblClass3.Text = Session("classes").Item(2).ToString
End Sub

End Class

ASKER CERTIFIED SOLUTION

kprestage

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kprestage

The above was generated using...
http://www.carlosag.net/Tools/CodeTranslator/Default.aspx

janjuama84

ASKER

what to do with

// Warning!!! Optional parameters not supported
// Warning!!! Optional parameters not supported

how to convert those?

kprestage

Optional parameters are not supported in C#. TO get the same behavior, you need to create mutliple methods. For example.

if you have a sub in vb called dosomething with two parameters and one is optional, in c# you would do

public void dosomething(int MyParm1){
//your code
}

public void dosomething(int MyParm1, int MyParm2){
//your code to use when both paramters are needed.
}

janjuama84

ASKER

this line

Private Sub InitialiseClasses(Optional ByVal ClassSizes As Integer = 15, Optional ByVal AmountofClasses As Integer = 3)

is converted into this

private void InitialiseClasses(int ClassSizes, void =, void 15, int AmountofClasses, void =, void 3) {

doesn't look right

janjuama84

ASKER

Can you help me convert this properly....

''' <summary>
''' Resets the radiolist when the dropdownlist with classes is changed
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
''' <remarks></remarks>
Protected Sub ddlClass_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ddlClass.SelectedIndexChanged

' ReBind the radiolist based on the amount of seats left in the class
radSeatsAvailable.DataSource = PopulateArrayList(Session("classes").Item(ddlClass.SelectedIndex).ToString)
radSeatsAvailable.DataBind()

UpdateLabels()

End Sub

kprestage

Automated tools can't do it all! Try just changing it to

private void InitialiseClasses(int ClassSizes, int AmountofClasses) {

kprestage

/// <summary>
/// Resets the radiolist when the dropdownlist with classes is changed
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
/// <remarks></remarks>
protected void ddlClass_SelectedIndexChanged(object sender, System.EventArgs e) {
// ReBind the radiolist based on the amount of seats left in the class
radSeatsAvailable.DataSource = PopulateArrayList(Session("classes").Item[ddlClass.SelectedIndex].ToString);
radSeatsAvailable.DataBind();
UpdateLabels();
}

kprestage

In the IDE, highlight the ddlClass object and in the SelectedIndexChanged event, enter ddlClass_SelectedIndexChanged as the handler. Or to manually do it, you could put this in your page load

ddlClass.SelectedIndexChanged += ddlClass_SelectedIndexChanged(object sender, System.EventArgs e);

janjuama84

ASKER

this is the code I have right now

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class Labs_lab2 : System.Web.UI.Page
{
protected void Page_Load(object sender, System.EventArgs e) {
// if first load then setup classes
if (!Page.IsPostBack) {
InitialiseClasses();
UpdateLabels();
}
}

private void InitialiseClasses(int ClassSizes, int AmountofClasse) {
ClassSizes = 15;
AmountofClasse = 3;
ArrayList TheClasses = new ArrayList();
// Warning!!! Optional parameters not supported
// Warning!!! Optional parameters not supported
int i;
// For the Amount of Classes Specified
for (i = 1; (i <= AmountofClasses); i++) {
// Add an integer of size ClassSizes to the ArrayList
TheClasses.Add(ClassSizes);
}
// Add the Classes Arraylist to the Session
Session("Classes") = TheClasses;
// Create an Arraylist of the size of ClassSizes and bind it to the Radio List
radSeatsAvailable.DataSource = PopulateArrayList(ClassSizes);
radSeatsAvailable.DataBind();
}

private ArrayList PopulateArrayList(int ArrayListLength) {
ArrayList myarray = new ArrayList();
int i;
// For the size of the arraylist
for (i = 1; (i <= ArrayListLength); i++) {
// Add an integer of the value i
myarray.Add(i);
}
return myarray;
}

protected void ddlClass_SelectedIndexChanged(object sender, System.EventArgs e) {
// ReBind the radiolist based on the amount of seats left in the class
radSeatsAvailable.DataSource = PopulateArrayList(Session("classes").Item[ddlClass.SelectedIndex].ToString);
radSeatsAvailable.DataBind();
UpdateLabels();
}

protected void btnPurchase_Click(object sender, System.EventArgs e) {
// Deduct the amount of seats based on the radio button selected
Session("classes").Item[ddlClass.SelectedIndex] = (Session("classes").Item[ddlClass.SelectedIndex]
- (radSeatsAvailable.SelectedIndex - 1));
// Bind the new amount of seats left
radSeatsAvailable.DataSource = PopulateArrayList(Session("classes").Item[ddlClass.SelectedIndex].ToString);
radSeatsAvailable.DataBind();
UpdateLabels();
}

private void UpdateLabels() {
lblClass1.Text = Session("classes").Item[0].ToString;
lblClass2.Text = Session("classes").Item[1].ToString;
lblClass3.Text = Session("classes").Item[2].ToString;
}
}

kprestage

Are you getting errors?

janjuama84

ASKER

yes here is it

Compiler Error Message: CS1501: No overload for method 'InitialiseClasses' takes '0' arguments

Source Error:

Line 15: // if first load then setup classes
Line 16: if (!Page.IsPostBack) {
Line 17: InitialiseClasses();
Line 18: UpdateLabels();
Line 19: }

kprestage

Ok....so your call to initialiseClasses was not using either of the optional paramters in VB, so you new method should be this. Replace your existing IntialiseClasses method with these 2 methods.

private void InitialiseClasses() {
ClassSizes = 15;
AmountofClasse = 3;
ArrayList TheClasses = new ArrayList();
// Warning!!! Optional parameters not supported
// Warning!!! Optional parameters not supported
int i;
// For the Amount of Classes Specified
for (i = 1; (i <= AmountofClasses); i++) {
// Add an integer of size ClassSizes to the ArrayList
TheClasses.Add(ClassSizes);
}
// Add the Classes Arraylist to the Session
Session("Classes") = TheClasses;
// Create an Arraylist of the size of ClassSizes and bind it to the Radio List
radSeatsAvailable.DataSource = PopulateArrayList(ClassSizes);
radSeatsAvailable.DataBind();
}

private void InitialiseClasses(int ClassSizes, int AmountofClasse) {
ArrayList TheClasses = new ArrayList();
int i;
// For the Amount of Classes Specified
for (i = 1; (i <= AmountofClasses); i++) {
// Add an integer of size ClassSizes to the ArrayList
TheClasses.Add(ClassSizes);
}
// Add the Classes Arraylist to the Session
Session("Classes") = TheClasses;
// Create an Arraylist of the size of ClassSizes and bind it to the Radio List
radSeatsAvailable.DataSource = PopulateArrayList(ClassSizes);
radSeatsAvailable.DataBind();
}

kprestage

Or even better, with this....

private void InitialiseClasses() {
ClassSizes = 15;
AmountofClasse = 3;
InitialiseClasses(ClassSizes, AmountofClasse);
}

private void InitialiseClasses(int ClassSizes, int AmountofClasse) {
ArrayList TheClasses = new ArrayList();
int i;
// For the Amount of Classes Specified
for (i = 1; (i <= AmountofClasses); i++) {
// Add an integer of size ClassSizes to the ArrayList
TheClasses.Add(ClassSizes);
}
// Add the Classes Arraylist to the Session
Session("Classes") = TheClasses;
// Create an Arraylist of the size of ClassSizes and bind it to the Radio List
radSeatsAvailable.DataSource = PopulateArrayList(ClassSizes);
radSeatsAvailable.DataBind();
}

janjuama84

ASKER

got this error now

Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0118: 'System.Web.UI.Page.Session' is a 'property' but is used like a 'method'

Source Error:

Line 40: }
Line 41: // Add the Classes Arraylist to the Session
Line 42: Session("Classes") = TheClasses;
Line 43: // Create an Arraylist of the size of ClassSizes and bind it to the Radio List
Line 44: radSeatsAvailable.DataSource = PopulateArrayList(ClassSizes);

kprestage

try

Session["Classes"] = TheClasses;

janjuama84

ASKER

that solved that issues here is another one

Compilation Error
Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0117: 'object' does not contain a definition for 'Item'

Source Error:

Line 61: protected void ddlClass_SelectedIndexChanged(object sender, System.EventArgs e) {
Line 62: // ReBind the radiolist based on the amount of seats left in the class
Line 63: radSeatsAvailable.DataSource = PopulateArrayList(Session["classes"].Item[ddlClass.SelectedIndex].ToString);
Line 64: radSeatsAvailable.DataBind();
Line 65: UpdateLabels();

Source File: C:\Inetpub\int422_071sq08\webcontent\Labs\lab2.aspx.cs Line: 63

kprestage

In C# you need to type everything. objects in Session are object types. To access their members you need to explicitly convert them to what they are.

radSeatsAvailable.DataSource = PopulateArrayList(((ArrayList )Session["classes"]).Item[ddlClass.SelectedIndex].ToString);

janjuama84

ASKER

its not helping me man... lots of error... not sure what to do

janjuama84

ASKER

Description: An error occurred during the compilation of a resource required to service this request. Please review the following specific error details and modify your source code appropriately.

Compiler Error Message: CS0117: 'object' does not contain a definition for 'Item'

Source Error:

Line 61: protected void ddlClass_SelectedIndexChanged(object sender, System.EventArgs e) {
Line 62: // ReBind the radiolist based on the amount of seats left in the class
Line 63: radSeatsAvailable.DataSource = PopulateArrayList(Session["classes"].Item[ddlClass.SelectedIndex].ToString);
Line 64: radSeatsAvailable.DataBind();
Line 65: UpdateLabels();

kprestage

This is the same exact error as above, you need to type Session["classes"] to an ArrayList

radSeatsAvailable.DataSource = PopulateArrayList(((ArrayList )Session["classes"]).Item[ddlClass.SelectedIndex].ToString);

or to make it easier to understand....

ArrayList x = (ArrayList) Session["classes"];
radSeatsAvailable.DataSource = PopulateArrayList(x.Item[ddlClass.SelectedIndex].ToString);
radSeatsAvailable.DataBind();
UpdateLabels();

janjuama84

ASKER

this one now

Line 26:
Line 27:
Line 28: private ArrayList PopulateArrayList(int ArrayListLength) {
Line 29: ArrayList myarray = new ArrayList();
Line 30: int i;

kprestage

Try

System.Collections.ArrayList myarray = new System.Collections.ArrayList(ArrayListLength);