C#中如何验证用户在10个文本框输入的字母数字值是否按升序排列

Let's walk through implementing this feature with your existing code. I'll cover collecting input, validating the order, and showing clear feedback to the user.

Step 1: Prepare a Collection of TextBoxes #

First, make it easier to work with all 10 text boxes by storing them in a list. Add this to your form's class:

private List<TextBox> _inputTextBoxes;

private void Form1_Load(object sender, EventArgs e)
{
    // Replace with your actual text box names (textBox1 to textBox10)
    _inputTextBoxes = new List<TextBox>
    {
        textBox1, textBox2, textBox3, textBox4, textBox5,
        textBox6, textBox7, textBox8, textBox9, textBox10
    };
}

Don't forget to hook up the Form1_Load event in your form's designer (or via code) so it runs when the form opens.

Step 2: Update Random List Generation (Optional but Useful) #

To keep track of the exact strings the user needs to sort, store the shuffled list as a class-level variable. This lets us generate the correct sorted version later:

private List<string> _currentRandomList;

private void button1_Click(object sender, EventArgs e)
{
    listBox1.Items.Clear();
    var originalList = new List<string> { "12fe", "46ge", "7uf", "15gs", "64ku", "42nt", "04bv", "07nh", "03lf", "86nj" };
    var random = new Random();
    // Create a shuffled copy of the original list
    _currentRandomList = originalList.OrderBy(x => random.Next()).ToList();
    
    foreach (var item in _currentRandomList)
    {
        listBox1.Items.Add(item);
    }
    
    // Clear input boxes when generating a new list
    foreach (var textBox in _inputTextBoxes)
    {
        textBox.Clear();
    }
}

Step 3: Implement Validation Logic in button2_Click #

This is where we check if the user's input is correctly sorted. I've included two validation options—pick whichever fits your needs:

1. Check if input matches the sorted version of the random list (ensures users used exactly the provided strings in order)
2. Check if input is itself in ascending order (allows any 10 alphanumeric values as long as they're sorted)

private void button2_Click(object sender, EventArgs e)
{
    // Step 1: Collect user input and check for empty fields
    var userInput = new List<string>();
    bool hasEmptyInput = false;
    
    foreach (var textBox in _inputTextBoxes)
    {
        string input = textBox.Text.Trim();
        if (string.IsNullOrEmpty(input))
        {
            hasEmptyInput = true;
            break;
        }
        userInput.Add(input);
    }
    
    if (hasEmptyInput)
    {
        MessageBox.Show("Please fill all 10 text boxes!", "Input Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        return;
    }
    
    // Option 1: Validate input matches the sorted random list (exact values in order)
    var sortedCorrectList = _currentRandomList.OrderBy(x => x).ToList();
    bool isExactMatch = userInput.SequenceEqual(sortedCorrectList);
    
    if (isExactMatch)
    {
        MessageBox.Show("Perfect! You entered the values in the correct ascending order.", "Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
        return;
    }
    
    // Option 2: Validate if user's input is itself in ascending order (any valid alphanumeric values)
    bool isSortedAscending = true;
    for (int i = 0; i < userInput.Count - 1; i++)
    {
        // Use ordinal comparison for standard alphanumeric sorting
        if (string.Compare(userInput[i], userInput[i+1], StringComparison.Ordinal) > 0)
        {
            isSortedAscending = false;
            break;
        }
    }
    
    if (isSortedAscending)
    {
        MessageBox.Show("Your input is in ascending order, but doesn't match the expected values from the list.", "Partial Success", MessageBoxButtons.OK, MessageBoxIcon.Information);
    }
    else
    {
        MessageBox.Show("Oops! Your input is not in ascending order. Please try again.", "Validation Failed", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}

Step 4: Optional - Restrict Input to Valid Strings #

To prevent users from entering values not in the random list, hook all 10 text boxes to this shared TextChanged event:

private void textBox_TextChanged(object sender, EventArgs e)
{
    var textBox = sender as TextBox;
    if (textBox == null || _currentRandomList == null) return;
    
    string input = textBox.Text.Trim();
    if (!string.IsNullOrEmpty(input) && !_currentRandomList.Contains(input))
    {
        // Highlight invalid input
        textBox.BackColor = Color.LightPink;
        // Optional: Clear invalid input after a short delay
        // textBox.Text = "";
    }
    else
    {
        textBox.BackColor = SystemColors.Window;
    }
}

Key Notes: #

• String Comparison: StringComparison.Ordinal follows standard Unicode order (digits before letters, uppercase before lowercase). Use StringComparison.OrdinalIgnoreCase if you need case-insensitive sorting.
• Empty Input Check: Always validate all fields are filled first to avoid errors during sorting checks.

内容的提问来源于stack exchange，提问作者sudesh