Question

I have listbox of strings. When I select one of this strings, I split it.

I want to send to the textboxes the split values of this string. How do I send the values to the textboxes?

I have this C# code:

private void button8_Click(object sender, EventArgs e)
{
    string Code;
    string Name;
    string PName;
    string Cost;
    string Num;
    string Level;

    using (var streamReader = new StreamReader(filePath, Encoding.Default))
    {
        if (!streamReader.EndOfStream)
        {
            Items.Add(streamReader.ReadLine());//list Items
        }
    }

    string z = listBox1.SelectedItem.ToString();

    string[] words = x.Split(',');
    foreach (string word in words)
    {
       if (words.Length == 6)
       {
            Code = words[0];
            Name = words[1];
            PName = words[2];
            Cost = words[3];
            Num = words[4];
            Level = words[5];
        }                
    }

    textBox1.Text = Code;       //This does not send anything to the textbox
    textBox2.Text = Name;
    textBox3.Text = PName;
    textBox4.Text = Cost;
    textBox5.Text = Num;
    textBox6.Text = Level;

    using (var streamWriter = new StreamWriter(
           filePath, false, Encoding.Default))
    {
        foreach (string op in Items)
        {
            streamWriter.WriteLine(op);
        }
    }
}

The C# code that does textBox1.Text = Code; does not send any text to the textbox, how do I assign a string to a textbox?

Answer 1

Your Code variable is still null when you are assigning it to the TextBox.

Change it to:

string Code = string.Empty;
// etc.

Based on your sample code though, you shouldn’t need any of those string variables or your ForEach. Just assign it straight to your TextBoxes.

textBox1.Text = words[0];
textBox2.Text = words[1];
textBox3.Text = words[2];
textBox4.Text = words[3];
textBox5.Text = words[4];
textBox6.Text = words[5];

And try giving your controls names, too. textBox4 doesn’t tell you it has anything to do with cost.