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POCreate a random customer number and display it in a textbox
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  1. POCreate a random customer number and display it in a textbox
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    copied!<p>im totally stuck here on creating a random number. Ideally not the same number twice as its a customer number.</p> <p>I then need to display it in my tb_id (textbox) and write the line into a customer file.</p> <p>Any help here would be great.</p> <pre><code>private void button1_Click(object sender, EventArgs e) { **var rng = new Random();** // Here I need to write the random number (it's a customer number) to the tb_id text box. so I'm able to write it to their customer file afterwards. try { string fileName = string.Format(tb_surname.Text); if (tb_firstname.Text == "" || fileName == "" || tb_postcode.Text == "") { MessageBox.Show("Missing values from textboxes!"); } else if (File.Exists(fileName + "Text")) { if (MessageBox.Show("Warning: There is already a file with the surname you enter already on the system. Contents will be replaced - do you want to continue?", "File Demo", MessageBoxButtons.YesNo, MessageBoxIcon.Question, MessageBoxDefaultButton.Button1, MessageBoxOptions.DefaultDesktopOnly) == DialogResult.Yes) { //write lines of text to file StreamWriter outputStream = File.CreateText(fileName + ".Txt"); outputStream.WriteLine(tb_firstname.Text); outputStream.WriteLine(tb_surname.Text); outputStream.WriteLine(tb_surname.Text); **outputStream.WriteLine(tb_id.Text);** outputStream.Close(); MessageBox.Show("Text saved to file successfully!"); this.Close(); } } } // ... } </code></pre> <p>part 2</p> <pre><code> // creating a random number here for the customer id Guid g = Guid.NewGuid(); tb_id.Text = g.ToString(); </code></pre> <p>to write Guid number to a text file.</p> <pre><code> outputStream.WriteLine(tb_id.Text); </code></pre>
 

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