C# : Printing variables and text in a textbox

I need to know the command that I can print a sentence like "the item Peter at row 233 and column 1222 is not a number " .

I far as now I have made this:

            string[] lineItems = (string[])List[]
                if (!Regex.IsMatch(lineItems[0], (@"^\d*$")))
        textBox2.Text += " The number ,lineItems[0], is bigger than 
10 " + Environment.NewLine;

I want to print the array fields that have error. So 开发者_如何学Goif it finds something it will print it.

I made a code that correctly prints that there is an error on this line of the array, but I cant print the item of the array.

I need to have an Environment.NewLine because I will print many lines.

Thanks , George.

foreach (int lineNumber in lineItems)
{
    if (lineNumber > 10)
        textBox2.Text += "The number " + lineNumber + " is bigger than 10\n";
}

Something like this should work, (I have not checked the c# code, I am working on a mac at the moment)

TextBox2.Text="This is FirstLine\nThis is Second Line";

The code is not compilable absolutely, but I may be understand what you're asking about.

If you are asking about how to compose the string of text box, by adding new strings to it, based on some desicional condition (regex), you can do folowing, pseudocode:

StringBuilder sb = new StringBuidler();
if (!Regex.IsMatch(lineItems[i], (@"^\d*$")))
   sb.Append(string.Format(The number ,{0}, is bigger than 10, lineItems[i]) + Environment.NewLine);

textBox2.Text = sb.ToString();

If this is not what you want, just leave the comment, cause it's not very clear from post.

Regards.