Question

I have a multi-line TextBox that I can either type or paste items into.At the bottom of the textbox I have an “Item Count = ” label and “0” textbox next to it.

I would like the text in the “0” textbox to keep track of the number of items in my textbox list in real time. Is this possible?

This is what I have, but I can’t get it to work:

 private void textBox2_TextChanged(object sender, EventArgs e)
    {
        char[] delimiterChars = { ',', ':', '|', '\n' };
        List<string> sortBox = 
              new List<string>(textBox_ListSource.Text.Split(delimiterChars));
        var itemCount = sortBox.Count();
        textBox_SourceCount.Text = itemCount;
    }

I am getting a red squiggly under the “itemCount” in the last line. It won’t compile and says can’t explicitly convert ‘int’ to ‘string’.

Answer 1

Try

textBox_SourceCount.Text = itemCount.ToString();

Also, you don’t need to use the LINQ Count function as a List has a Count property.

var itemCount = sortBox.Count(); // Calls a LINQ function which calls the Count property
var itemCount = sortBox.Count; // Calls the Count property directly

For future reference, C# will not automatically cast an int to a string. You need to perform the conversion explicitly in most cases.