App crash when calling MessageBox

Question

Hello i call up a MessageBox when validating some data, if the data is wrong I message the user with a MessageBox with following code:

private void button1_Click(object sender, EventArgs e)
{
    if (textBox_name.Text.Trim() != "" 
        || textBox_X.Text.Trim() != "" 
        || textBox_Y.Text.Trim() != "")
    {
        if (graph.getNodoNome(textBox_nome.Text.Trim()) != null)
        {
            MessageBox.Show("Data is wrong?", "Error");

            resetTextBoxes();
            return;
        }

    // randome stuff
    }
}

My app crash with this, when i remove the MessageBox works fine. Thanks for the help

EDIT: Pastebay link for the entire method http://pastebay.com/82690

Answer 1

You should mention the type of exception.

Since I can't assume that, I'll comment on other potential sources of error?

Honestly also, your

        if (textBox_nome.Text.Trim() != "" 
            || textBox_X.Text.Trim() != "" 
            || textBox_Y.Text.Trim() != "")

should be

        if (textBox_nome.Text.Trim() != "" 
            && textBox_X.Text.Trim() != "" 
            && textBox_Y.Text.Trim() != "")

to make sure all fields are filled in.

Int.Parse will throw if invalid, I suggest (in pseudo C#):

int x;
if(!int.TryParse(text, out x)) x = 0; // some default value