Compare input to list

Manoj Bhatt 2091 17 Dec 2013

Is it possible to compare the input text in a textbox in a windows form to the items in a list and then save it if it doesn't exist there.

public Form1()
{
    InitializeComponent();
    if (txtId.Text == Id.myList)
    {
        myList.Add(txtId.Text);
    }
    else (){
        MessageBox.Show("Id already exists");
    }
}

Ask by Manoj Bhatt

Updated 17 Dec 2013

1 Answers

Pravesh Singh 17 Dec 2013

Hi Manoj,

You can loop trough all the items in the list and create a bool variable to check whether you have found the value in the list.

bool _Found = false;
foreach (string a in list)
{
    if (a == textBox1.Text)
    {
        _Found = true;
        break;
    }
    else
        _Found = false;
}
if (_Found) { }
else { list.Add(textBox1.Text) }
Or use List(T).Contains Method
if (list.Contains(textBox1.Text)) { }

Markdown for AI

A clean, structured version of this page for AI assistants and LLMs.

Open .md

forum

Compare input to list

Can you answer this question?

1 Answers