I'm sorry to bother but I need some help from the experts! I'm trying to do an exercise that will create a simple
class called Character, with 3 properties and 2 methods... on the page side, I have only a single Label called "resultLabel"... the problem is that I want to assign some text to this server control from this new class, and
I get an error message saying that the name "resultLabel" does not exist in current context... I can't access my server label from other class than _Default ?? Please advise... Below is my code.
using System;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Character Hero = new Character() { Name="Hulk", Health = 100, DamageMax = 25, AttackBonus = 5 };
Character Monster = new Character() { Name = "Loki", Health = 100, DamageMax = 25, AttackBonus = 5 };
Monster.Defend(Hero.Attack());
}
}
public class Character
{
private Random myRandom = new Random();
public string Name { get; set; }
public int Health { get; set; }
public int DamageMax { get; set; }
public int AttackBonus { get; set; }
public int Attack() {
return myRandom.Next(1, 35);
}
public void Defend(int damage) {
resultLabel.Text = $"{Name} suffered {damage}% damage..."; <<<<============== ERROR! ERROR! ERROR!
this.Health -= damage;
}
}
you get the error because resultLabel is not member of Character and it is not accessible from there.
I am kindly advise you not to mix the logic, if i were you i would add a public property DefendResult in Characters, in Defends method i would set the value of DefendResult with your message, and i would fill the labelResult text in the Page_Load event something
like this
using System;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Character Hero = new Character() { Name="Hulk", Health = 100, DamageMax = 25, AttackBonus = 5 };
Character Monster = new Character() { Name = "Loki", Health = 100, DamageMax = 25, AttackBonus = 5 };
Monster.Defend(Hero.Attack());
resultLabel.Text = Monster.DemageResult
}
}
public class Character
{
private Random myRandom = new Random();
public string Name { get; set; }
public int Health { get; set; }
public int DamageMax { get; set; }
public int AttackBonus { get; set; }
public string DamageResult { get; set; }
public int Attack() {
return myRandom.Next(1, 35);
}
public void Defend(int damage) {
this.DamageResult = $"{Name} suffered {damage}% damage..."; <<<<============== ERROR! ERROR! ERROR!
this.Health -= damage;
}
}
As DevNoose mentioned you cannot access label control from Character class. An alternative approach is to make the Defend method return formatted string.
Sample Implemenation
public class Character
{
private Random myRandom = new Random();
public string Name { get; set; }
public int Health { get; set; }
public int DamageMax { get; set; }
public int AttackBonus { get; set; }
public string DamageResult { get; set; }
public int Attack()
{
return myRandom.Next(1, 35);
}
//Change Void to string
public string Defend(int damage)
{
this.Health -= damage;
//Return the formatted string
return $"{Name} suffered {damage}% damage..."; //<<<<============== ERROR!ERROR!ERROR!
}
}
Then in your page code behind assign the value to label
Character Hero = new Character() { Name = "Hulk", Health = 100, DamageMax = 25, AttackBonus = 5 };
Character Monster = new Character() { Name = "Loki", Health = 100, DamageMax = 25, AttackBonus = 5 };
resultLabel.Text = Monster.Defend(Hero.Attack());
Member
12 Points
17 Posts
The name 'xxxx' does not exist in current context... PLEASE help me!
Aug 24, 2017 03:07 PM|sipi.perez@gmail.com|LINK
I'm sorry to bother but I need some help from the experts! I'm trying to do an exercise that will create a simple class called Character, with 3 properties and 2 methods... on the page side, I have only a single Label called "resultLabel"... the problem is that I want to assign some text to this server control from this new class, and I get an error message saying that the name "resultLabel" does not exist in current context... I can't access my server label from other class than _Default ?? Please advise... Below is my code.
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"></head> <body> <form id="miforma" runat="server"> <asp:Label ID="resultLabel" runat="server" Text=""></asp:Label> </form> </body> </html>and the C# behind with my class
using System; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Character Hero = new Character() { Name="Hulk", Health = 100, DamageMax = 25, AttackBonus = 5 }; Character Monster = new Character() { Name = "Loki", Health = 100, DamageMax = 25, AttackBonus = 5 }; Monster.Defend(Hero.Attack()); } } public class Character { private Random myRandom = new Random(); public string Name { get; set; } public int Health { get; set; } public int DamageMax { get; set; } public int AttackBonus { get; set; } public int Attack() { return myRandom.Next(1, 35); } public void Defend(int damage) { resultLabel.Text = $"{Name} suffered {damage}% damage..."; <<<<============== ERROR! ERROR! ERROR! this.Health -= damage; } }Member
50 Points
27 Posts
Re: The name 'xxxx' does not exist in current context... PLEASE help me!
Aug 24, 2017 04:58 PM|DevNoose|LINK
Hi,
you get the error because resultLabel is not member of Character and it is not accessible from there.
I am kindly advise you not to mix the logic, if i were you i would add a public property DefendResult in Characters, in Defends method i would set the value of DefendResult with your message, and i would fill the labelResult text in the Page_Load event something like this
using System; public partial class _Default : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { Character Hero = new Character() { Name="Hulk", Health = 100, DamageMax = 25, AttackBonus = 5 }; Character Monster = new Character() { Name = "Loki", Health = 100, DamageMax = 25, AttackBonus = 5 }; Monster.Defend(Hero.Attack()); resultLabel.Text = Monster.DemageResult } } public class Character { private Random myRandom = new Random(); public string Name { get; set; } public int Health { get; set; } public int DamageMax { get; set; } public int AttackBonus { get; set; } public string DamageResult { get; set; } public int Attack() { return myRandom.Next(1, 35); } public void Defend(int damage) { this.DamageResult = $"{Name} suffered {damage}% damage..."; <<<<============== ERROR! ERROR! ERROR! this.Health -= damage; } }All-Star
50601 Points
9821 Posts
Re: The name 'xxxx' does not exist in current context... PLEASE help me!
Aug 24, 2017 05:13 PM|A2H|LINK
As DevNoose mentioned you cannot access label control from Character class. An alternative approach is to make the Defend method return formatted string.
Sample Implemenation
public class Character { private Random myRandom = new Random(); public string Name { get; set; } public int Health { get; set; } public int DamageMax { get; set; } public int AttackBonus { get; set; } public string DamageResult { get; set; } public int Attack() { return myRandom.Next(1, 35); } //Change Void to string public string Defend(int damage) { this.Health -= damage; //Return the formatted string return $"{Name} suffered {damage}% damage..."; //<<<<============== ERROR!ERROR!ERROR! } }Then in your page code behind assign the value to label
Character Hero = new Character() { Name = "Hulk", Health = 100, DamageMax = 25, AttackBonus = 5 }; Character Monster = new Character() { Name = "Loki", Health = 100, DamageMax = 25, AttackBonus = 5 }; resultLabel.Text = Monster.Defend(Hero.Attack());Aje
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