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Good morning,
I am doing a page for my intership and I found this function but it isn't working, can someone help?
Thank you in advance.
string _id = this.txtIdGrupo.Text;
if (!Regex.IsMatch(_id, #"^\d+$"))
return false;
The output says this:
error CS0103: The name 'Regex' does not exist in the current context
this is not an issue with the bit of code you showed.
This is a namespace issue at the very top of your file.
The solution should be https://learn.microsoft.com/en-us/dotnet/csharp/programming-guide/namespaces/
using System;
using System.Text.RegularExpressions;
public class Test
{
public static void Main ()
{
var isNumeric1 = IsNumeric("1");
Console.WriteLine(isNumeric1);
var isNumeric2 = IsNumeric("HelloWorld");
Console.WriteLine(isNumeric2);
//call IsNumeric with the value of this.txtIdGrupo.Text like this
//var isNumeric = IsNumeric(this.txtIdGrupo.Text);
}
private static bool IsNumeric(string str)
{
string id = str;
if (!Regex.IsMatch(id, #"^\d+$"))
return false;
return true;
}
}
See it in action:
https://dotnetfiddle.net/I7cAKs
notice the "using System.Text.RegularExpressions"
Using tools like Resharper and similar will definitely give you hints and will improve your day to day !
Make sure you have the System.Text.RegularExpressions
is imported
Related
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Good evening, I was working on a graphic adventure and I want to make a random function with a 4 digit code, turns out that as I am a very novice programmer, I crashed with an inconvenient
private void CheckResults()
{
if (codeSequence = RandomCode.RanCode.ToString())
{
SoundManager.PlaySound("nice");
}
else
{
SoundManager.PlaySound("wrong");
}
"RandomCode.RanCode" is a int void, and adding "ToString" will shot an error saying
"RanCode is a method which is not valid in the given context"
This is the RandomCode void:
public void RanCode()
{
Code = Random.Range(1111, 9999);
}
If anyone out there has any ideas or solves, I will be eternally grateful
There's no such thing as an "int void". A method either returns nothing (void) or returns a value (in your case you seem to expect int).
// Returns nothing
// |
// v
public void RanCode()
{
// assigns result of `Range` to `Code` property/field
Code = Random.Range(1111, 9999);
}
If you want to also return the value, you need to rewrite your method like this:
public int RanCode()
{
Code = Random.Range(1111, 9999);
return Code;
}
You do have another issue here:
RandomCode.RanCode.ToString()
To call a method you need (), so it should be this:
RandomCode.RanCode().ToString()
Also, for equality checks you want == not = (which is assignment).
I do wonder why you're assigning a value to Code here. If we use your existing code (without my fix above), I guess that perhaps you intended something like this instead?:
private void CheckResults()
{
RandomCode.RanCode();
if (codeSequence == RandomCode.Code.ToString())
{
SoundManager.PlaySound("nice");
}
else
{
SoundManager.PlaySound("wrong");
}
}
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So, basically, I am trying to make a save point in my text rpg. I wanted to do it by using a .txt file and jumping to each method that way. However, when I try and put in the path of the file and the string contents, it returns a CS0029 error and states that it can not convert a void to a string.
public void PickingUpScroll()
{
savePoint = "PickingUpScroll";
saveData = File.WriteAllText(savePath, savePoint);
hasFireMagic = true;
Console.WriteLine("You approach the strange scroll in your room and pick it up. A strange light eminates from the foreign symbols on the paper. You feel a warmth in your hands.\nLooking down, you notice they are glowing with a strange light, almost like fire.");
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("You have accquired 'Fire Magic'");
Console.ForegroundColor = ConsoleColor.White;
if (hasWeapons == false)
{
Console.WriteLine("Do you approach the weapons?\n[1] Yes [2] No");
int scrollToSwordCheck = Convert.ToInt32(Console.ReadLine());
if (scrollToSwordCheck == 1)
{
PickingUpSword();
}
}
else
{
LeavingRoom();
}
}
The File.WriteAllText method is a void (it doesn't return any value)
https://learn.microsoft.com/en-us/dotnet/api/system.io.file.writealltext?view=net-5.0
You can get rid of the variable saveData in the line:
saveData = File.WriteAllText(savePath, savePoint);
and just use the method:
File.WriteAllText(savePath, savePoint);
(and keep in mind that you will need to instantiate and assign the variable savePath somewhere prior its usage)
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I'm new to coding and have encountered an error with the code and I'm unsure how to fix it. I'm using unity 2018 and it tells me -
error CS1519: Invalid token '=' in class, struct, or interface member declaration
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class AutoCookies : MonoBehaviour {
public bool CreatingCookie = false;
public static CookieIncrease = 1;
public int InternalIncrease;
void Update() {
InternalIncrease = CookieIncrease;
if (CreatingCookie == false)
{CreatingCookie = true;
StartCoroutine(CreateTheCookie());
}
}
IEnumerator CreateTheCookie ()
{
GlobalCookie.CookieCount += InternalIncrease;
yield return new WaitForSeconds(1);
CreatingCookie = false;
}
}
I've looked at what the error actually means and I've tried to fix it but I've been unsuccessful. The code is designed to auto create cookies for a game I'm coding for my year 12 Major Works.
As Daniel White said, public static CookieIncrease = 1; is the problem.
There is no type definition for CookieIncrease.
public static int CookieIncrease = 1; is probably what you were going for.
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Closed 6 years ago.
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Error comes up for the method requiring await operators but where do I put them and what is an await operator and async and Task? :)
public async void OnLocationChanged(Location location)
{
_currentLocation = location;
if (_currentLocation == null)
{
_locationText.Text = "Unable to determine your location. Try again in a short while.";
}
else
{
_locationText.Text = string.Format("{0:f6},{1:f6}", _currentLocation.Latitude, _currentLocation.Longitude);
as
}
}
I want specific help in the example above :)
Just remove asycn keyword from method's signature !
public void OnLocationChanged(Location location)
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Closed 7 years ago.
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im kinda new to C# and i got a code that uses public static bool.
But how do i check it?
I tried to do this
public static bool CheckForInternetConnection()
{
try
{
using (var client = new WebClient())
{
using (var stream = client.OpenRead("http://www.google.com"))
{
return true;
}
}
}
catch
{
return false;
}
}
private async void Form1_Load(object sender, EventArgs e)
{
await Task.Delay(5000);
if (CheckForInternetConnection() = true)
{
}
}
And it gave me an error.
I confirm the comments: it's only a syntax error due to the lack of the 2nd = char in the if(...) conditional block. I've tested your code in a console project on the run and, with the 2nd = it works fine.