Hello all,

I'm new here and this would be my first post! I'm quite the beginner at C# programming, so I'm sorry if this is a no-brainer. Also I searched and couldn't find any relavent material, if a post exists that solves this problem, feel free to direct me there and close this thread.

I'm making a grading program that takes X number of scores, averages them, then finds the equivilent letter grade. I have everythingworking except the empty text box checker. I use a seperate class for the bulk of my error checking (entitled Class1.cs). In said class I have a method that checks the Form1 textboxes for empty values. So far I've tried:



Thats really the only way I know how to call it. However, when I attempt that code, it states "that an object is required for the nonstatic field, method, or property." I'm not sure what this error is and have searched google for an answer, but found nothing that applies to the code I'm working on.

I've also tried declaring Form1 in Class1 and calling the Textbox by name, ie:


However I get a Stack Overflow Exception and don't know how to solve it. Any tips would be greatly appreciated!

~Vaune

Why not just use a RequiredFieldValidator?

Because I don't know how, and this is the way my teacher specified he wanted it done, sorry should have mentioned that in the OP.

This post has been edited by Vaune: 25 Mar, 2008 - 10:40 AM

I would keep the Form completely out of the equation, doing this will make the class reusable for any Form or TextBox you wish to validate. I would make a generic method, which you pass a reference to the TextBox to it. Something like this

public bool emptyTextMethod(TextBox name)
{
    //check the value of the textbox
    if (name.Text == string.Empty)
    {
        //it is empty so return true
        return true;
    }
    else
    {
        //otherwise return false
        return false;
    }
}//end method

Then when doing your Form validation you could use it like so

if(emptyTextMethod(NameTextBox))
{
       MessageBox.Show("Please enter a name.");
       NameTextBox.Focus();
}

Since you are doing this in a separate class file, you will either need a reference to the System.Windows.Forms Namespace, or in the signature of the method use System.Windows.Forms.TextBox instead of TextBox.

Hope that helps

That answers my problem exactly! Thanks to you PsychoCoder, I got it working and my project is complete! Muchos gracias senior!

**Just editing to reiterate how thankful I am. That had been bothering me all day and I couldn't figure it out! Thanks for the quick, clear, and very helpful response Pycho.**

~Vaune

This post has been edited by Vaune: 25 Mar, 2008 - 11:29 AM

No problem, glad I could help. Now in the words of our fearless leader, tell all your friends about us here

Will do!