Need help with coding

[R2DJ]

I'm doing a C sharp homework which is due tomorrow and I can't seem to get things right. Please help!

CODE
private void button1_Click(object sender, EventArgs e)
{
string userInput;
userInput = this.textBox1.Text;

if (userInput.Contains("$"))
{
this.lblOutput.Text = "Thank you";
this.lblOutput.ForeColor = Color.Green;
}
else
{
this.lblOutput.Text = "Error";
this.lblOutput.ForeColor = Color.Red;
}
}



This code is embedded in a button in the form I made. This code means that if "$" is entered in the text box when the button is pressed, it will display the message "Thank You". Otherwise, it will say "Error".

Now what I need to do is to change the code so "Thank You" will be displayed when a character between 0-9 is entered. Can anyone help me?

I would appreciate the help! Also, if you got a very reliable source for learning C# and stuff, please give them to me.

 

[tj_cool]

I know nothing of c# so perhaps this doesn't work, but I'll try anyway

1) if (userInput.Contains("£") || userInput.Contains("%"))
2) if (userInput.Contains("$") && userInput.Contains("£"))
3) no idea

someone else correct me please

 

[Mangofett]

Okay, I don't know C# either but here is how it would happen for #3 in Java(pseudocode):

x =scanner.nextint (this gets an integer value)
if (x>=0 && x

 

[R2DJ]

I know nothing of c# so perhaps this doesn't work, but I'll try anyway

1) if (userInput.Contains("£") || userInput.Contains("%"))
2) if (userInput.Contains("$") && userInput.Contains("£"))
3) no idea

someone else correct me please

These worked. Thanks a bunch!

Okay, I don't know C# either but here is how it would happen for #3 in Java(pseudocode):

x =scanner.nextint (this gets an integer value)
if (x>=0 && x

 

[R2DJ]

BUMP

 

[Psyfira]

Userinput is being pulled in as a string. You may need to convert it to a number datatype before the comparisons will work.
Converting strings to numbers

 

[R2DJ]

Userinput is being pulled in as a string. You may need to convert it to a number datatype before the comparisons will work.
Converting strings to numbers

I don't get it...

I'm a complete noob in programming. I have only learned basic stuff like designing forms. Not into deep coding and stuff yet so I'm not really familiar with most of the codes.

Something tells me that I just need to do a slight change in that line I highlighted in bold to get it working but...

 

[Mangofett]

What I got from that page (no way to test it but it looks right)
CODEprivate void button1_Click(object sender, EventArgs e)
{
string userInput;
double tempnumber;
userInput = this.textBox1.Text;
tempnumber = Convert.ToDouble(userInput);

if ((tempnumber=0))
{
this.lblOutput.Text = "Thank you";
this.lblOutput.ForeColor = Color.Green;
}
else
{
this.lblOutput.Text = "Error";
this.lblOutput.ForeColor = Color.Red;
}
}

 

[R2DJ]

What I got from that page (no way to test it but it looks right)
CODEprivate void button1_Click(object sender, EventArgs e)
{
string userInput;
double tempnumber;
userInput = this.textBox1.Text;
tempnumber = Convert.ToDouble(userInput);

if ((tempnumber=0))
{
this.lblOutput.Text = "Thank you";
this.lblOutput.ForeColor = Color.Green;
}
else
{
this.lblOutput.Text = "Error";
this.lblOutput.ForeColor = Color.Red;
}
}

This only allows me to enter one character and it has to be a number. Oh well, this will do..

Thanks for all the help guys

Now I get 10% of marks on my module

 

[Mangofett]

What else were you expecting it to do...?

If you want error checking or whatever else, write it yourself.