c# - 猜测用户将在文本框中输入什么

Question

C# 中有没有办法猜测用户将要输入什么？例如，当您在 Visual Studio 中键入并以 Fi 开头时，File 会作为答案出现并提示用户按 Enter 键输入。有没有办法用文本框做到这一点？

Answer 1

这实际上取决于您的应用程序的复杂性，但一种简单的方法是将 TextBox 上的AutoCompleteMode属性设置为相关的AutoCompleteMode枚举。来自 MSDN 链接的示例代码

private void Form1_Load(object sender, EventArgs e)
{
    // Create the list to use as the custom source.  
    var source = new AutoCompleteStringCollection();
    source.AddRange(new string[]
                    {
                        "January",
                        "February",
                        "March",
                        "April",
                        "May",
                        "June",
                        "July",
                        "August",
                        "September",
                        "October",
                        "November",
                        "December"
                    });

    // Create and initialize the text box. 
    var textBox = new TextBox
                  {
                      AutoCompleteCustomSource = source,
                      AutoCompleteMode = 
                          AutoCompleteMode.SuggestAppend,
                      AutoCompleteSource =
                          AutoCompleteSource.CustomSource,
                      Location = new Point(20, 20),
                      Width = ClientRectangle.Width - 40,
                      Visible = true
                  };

    // Add the text box to the form.
    Controls.Add(textBox);
}