确定该文本框是否包含与任何其他文本框相同的值

Question

我使用C#使用winforms，我想检查我的一个文本框是否与我的文本框数组中的任何其他文本框具有相同的值。用户在文本框中输入值，如果输入任何重复值，则会显示错误。当我使用带有for循环的textchanged事件处理程序来遍历整个数组时，它会检查每个文本框，而不是将只更改了文本的文本框与其他文本框进行比较。

public partial class Form1 : Form
{
TextBox[,] textBoxArray = new TextBox[5, 5];

public Form1()
{
InitializeComponent();
textBoxArray[0, 0] = textBox1;
textBoxArray[0, 1] = textBox2;
textBoxArray[0, 2] = textBox3;
textBoxArray[0, 3] = textBox4;
textBoxArray[0, 4] = textBox5;
textBoxArray[1, 0] = textBox6;
textBoxArray[1, 1] = textBox7;
textBoxArray[1, 2] = textBox8;
textBoxArray[1, 3] = textBox9;
textBoxArray[1, 4] = textBox10;
textBoxArray[2, 0] = textBox11;
textBoxArray[2, 1] = textBox12;
textBoxArray[2, 2] = textBox13;
textBoxArray[2, 3] = textBox14;
textBoxArray[2, 4] = textBox15;
textBoxArray[3, 0] = textBox16;
textBoxArray[3, 1] = textBox17;
textBoxArray[3, 2] = textBox18;
textBoxArray[3, 3] = textBox19;
textBoxArray[3, 4] = textBox20;
textBoxArray[4, 0] = textBox21;
textBoxArray[4, 1] = textBox22;
textBoxArray[4, 2] = textBox23;
textBoxArray[4, 3] = textBox24;
textBoxArray[4, 4] = textBox25;

}
private void newGame_Click(object sender, EventArgs e)
{
Random rand = new Random();
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
textBoxArray[i, j].Text = "";
textBoxArray[i, j].ReadOnly = false;
}
}
int randomNum = rand.Next(0, 5);
textBoxArray[randomNum, randomNum].Text = "1";
}
private void ifTextChanged (object sender, EventArgs e)
{
// Set textbox with Value 1 to Read Only
for (int i = 0; i < 5; i++)
{
for (int j = 0; j < 5; j++)
{
if (textBoxArray[i, j].Text.Equals("1"))
{
textBoxArray[i, j].ReadOnly = true;
}

}
}

}

Answer 1

在所有文本框上放置相同的文本更改事件处理程序：

private void Any_TextChanged(object sender, EventArgs e){
if(this.Controls.OfType<TextBox>().Any(tb => tb != sender && tb.Text == (sender as TextBox).Text))
MessageBox.Show((sender as TextBox).Text = "Dupe";
}