textfile to textbox how?

[muffinresearch]

Hi I want to read a text file and then put the text into a textbox.

what doesn't seem to be possibleis how to access a variable outside of the static. e.g. textBox1.Text = S; isn't right!!!

Here is the code - any ideas or alternative suggestions wouldbe greatly appreciated.


[STAThread]
static void Main()
{
//Get the text from the AUP.txt file
try
{
Fileread();
}

catch (Exception)
{
MessageBox.Show("The file does not exist!");
}

Application.Run(new Form1());
}

static void Fileread()
{
StreamReader SR;
string S;
SR=File.OpenText("AUP.txt");
S=SR.ReadToEnd();
SR.Close();
textBox1.Text = S;
}

 

[chiph]

You need to prefix your call to the textbox with the name of a variable that points to your form:

Form1.Textbox1.Text = "blah";

Chip H.


If you want to get the best response to a question, please check out FAQ222-2244 first

 

[muffinresearch]

Nope that's not the answer! - I'd already tried that.

you get:
Form1.cs(153): An object reference is required for the nonstatic field, method, or property 'Myapp.Form1.textBox1'

I've also tried using Myapp.Form1.textBox1.Text = "stuff";

too.

There's something about static - I'm new to this and I don't have a grasp of exactly why.

 

[chiph]

Well, Form1 is obviously the class name for your form (remember, forms are classes). You'd have to supply the instance variable:

Form1 MyForm = new Form1();
MyForm.TextBox1.Text = "blah";

Chip H.


If you want to get the best response to a question, please check out FAQ222-2244 first

 

[muffinresearch]

Thanks for that now I'm not getting the errors but the text is not finding it's way into the textbox!

If I use the following the messagebox shows the text but the textBox does not! See my first post for the code starting the app.

static void Fileread()
{
StreamReader SR;
string S;
SR=File.OpenText("AUP.txt");
S=SR.ReadToEnd();
SR.Close();
Form1 thisform = new Form1();
thisform.textBox1.Text = S;
MessageBox.Show(S);
}

 

[obislavu]

There are many reasons for what you do not see the text in the textbox.


> Form1 thisform = new Form1();
> thisform.textBox1.Text = S;
This is working but you should call thisform.ShowDialog() function otherwise at the end of the function , "thisform" object is deleted!
Solution:
Implement the Form1_Load handler and process there the existance of the file e.g show message and exit else set the content of the file in the textBox1.Text.
The Form1_Load is called before the form is displayed for the first time.

this.Load += new System.EventHandler(this.Form1_Load);
private void Form1_Load(object sender, System.EventArgs e)
{
	string s = Fileread();
	if (s == null)
	{
		System.Windows.Forms.MessageBox.Show("The file does not exist!");
		Application.Exit();
	}
	else
		textBox1.Text = Fileread();
}

The main:

[STAThread]
static void Main() 
{
	Application.Run(new Form1());
}

The Fileread()

private static string Fileread()
{
	StreamReader SR;
	string S;
	try
	{
		SR=File.OpenText("C:\\AUP.txt");
		S=SR.ReadToEnd();
		SR.Close();
	}
	catch (Exception ex)
	{
		S= null;
	}
	return S;
}

-obislavu-