使用 C# 找到所有空文本框和组合框

Question

大家好，我想以简单的方式找到所有空的 TextBox 和 ComboBox。 正如您在下图中看到的，如果字段为空，它们会显示消息和红色背景颜色，其中文本框或组合框为空。

我尝试了一些错误，感谢那些可以解决这个问题的人。

        TextBox [] textBox = { textBox1, textBox2};
        ComboBox[] comboBox = { comboBox1, comboBox2 };

        foreach (TextBox txt in textBox)
        {
            if (string.IsNullOrEmpty(txt.Text))//if all textbox is empty
            {
                txt.BackColor = Color.Red;
                string message = "Required field empty.";
                string tittle = "Error";
                MessageBoxButtons button = MessageBoxButtons.OK;
                DialogResult result = MessageBox.Show(message, tittle, button, MessageBoxIcon.Error);
                break;

            }
            else if (!string.IsNullOrEmpty(txt.Text))//if not empty
            {

                txt.BackColor = Color.White;
                MessageBox.Show("task complete");
                break;
            }

        }
        return;

Answer 1

// Arrays to hold your TextBox and ComboBox controls
TextBox[] textBoxes = { textBox1, textBox2 };
ComboBox[] comboBoxes = { comboBox1, comboBox2 };

bool isEmpty = false; // Flag to indicate if any field is empty

// Check each TextBox
foreach (TextBox txt in textBoxes)
{
    if (string.IsNullOrEmpty(txt.Text))
    {
        txt.BackColor = Color.Red;
        isEmpty = true;
    }
    else
    {
        txt.BackColor = Color.White;
    }
}

// Check each ComboBox
foreach (ComboBox cmb in comboBoxes)
{
    if (string.IsNullOrEmpty(cmb.Text))
    {
        cmb.BackColor = Color.Red;
        isEmpty = true;
    }
    else
    {
        cmb.BackColor = Color.White;
    }
}

// Show a single message if any field is empty
if (isEmpty)
{
    string message = "Required field empty.";
    string title = "Error";
    MessageBoxButtons buttons = MessageBoxButtons.OK;
    MessageBox.Show(message, title, buttons, MessageBoxIcon.Error);
}
else
{
    MessageBox.Show("Task complete");
}