Checking input values with array contents in C#.net - arrays

Question

I have an array with 5 integer values.
I need to check each value in it against input values from a text box.
A label displays a Value found message if the input value exists in the array.
If not, theValue not found message is displayed.
How do I display the Value not found message correctly?
Here's my code,
private void button1_Click(object sender, EventArgs e)
{
try
{
int[] id = { 1, 2, 3, 4, 5 };
int row;
int x = Convert.ToInt32(txtid.Text);
for (row = 0; row < id.Length; row++)
{
if (id[row] == x)
{
txtdesc.Text = "Value found!";
}
}
txtdesc.Text = "Value not found!";
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}

Answer 1

Without going into great detail, using a flag is the simplest way of tracking a Boolean state when you are first starting out.
private void button1_Click(object sender, EventArgs e)
{
try
{
int[] id = { 1, 2, 3, 4, 5 };
int row;
int x = Convert.ToInt32(txtid.Text);
bool found = false;
for (row = 0; row < id.Length; row++)
{
if (id[row] == x)
{
found = true;
}
}
txtdesc.Text = found ? "Value found!" : "Value not found!";
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
With LINQ, these things get a lot easier:
// At the top of the file
using System.Linq;
private void button1_Click(object sender, EventArgs e)
{
try
{
int[] id = { 1, 2, 3, 4, 5 };
int x = Convert.ToInt32(txtid.Text);
txtdesc.Text = id.Contains(x) ? "Value found!" : "Value not found!";
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
}

Answer 2

private void button1_Click(object sender, EventArgs e)
{
try
{
int[] id = { 1, 2, 3, 4, 5 };
int row;
int x = Convert.ToInt32(txtid.Text);
for (row = 0; row < id.Length; row++)
{
if (id[row] == x)
{
txtdesc.Text = "Value found!";
return; //only add this line
}
}
txtdesc.Text = "Value not found!";
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}