winform-基于键入的历史记录的自动完成文本框

问题描述

尊敬的专家，

我想在winform中为文本框实现自动完成功能，就像SAP一样，SAP将基于用户输入而不是外部文件/数据库或硬编码集合.


谢谢，

--- Anil Kumar

Dear Experts,

I want to implement autocomplete feature in my winform for textbox just like SAP which will be based on user input instead of external file/database or hard-coded collections.


Thanks,

--- Anil Kumar

推荐答案

using System;
using System.Collections.Generic;
using System.Windows.Forms;
namespace AutoComplete
{
    static class Program
    {
        [STAThread] // You have to set STA when using AutoCompleteCustomSource !!!!
        static void Main()
        {
            // Create a Form 
            Form form = new Form();
            // ... and a description Label 
            Label label = new Label();
            label.Text = "I will remember";
            label.Dock = DockStyle.Top;
            // Now create a TexBox  
            TextBox textbox = new TextBox();
            textbox.Dock = DockStyle.Top;
            // ... and enable AutoComplete
            textbox.AutoCompleteMode = AutoCompleteMode.SuggestAppend; // Set the AutoCompleteMode you like
            textbox.AutoCompleteSource = AutoCompleteSource.CustomSource; // we will use a custome source (the entered text)
            // create a button to simulate validate/lost focus (whatever your real strategy will be)
            Button button = new Button();
            button.Dock = DockStyle.Top;
            button.Text = "Add to history";
            // if the button is clicked the text should be added to history 
            button.Click += delegate(object sender, EventArgs e)
            {
                // add a new text to the AutoCompleteCustomSource list
                string strTextToAdd = textbox.Text;
                if (!String.IsNullOrWhiteSpace(strTextToAdd))// in reality you will want filter or validate the text
                {
                    textbox.AutoCompleteCustomSource.Add(strTextToAdd);
                }
                // lets clear the textbox after that in this example
                textbox.Text = String.Empty;
                // ...  and refocus it
                textbox.Focus();
            };
            // Add all the Controls to the Form
            form.Controls.Add(button);
            form.Controls.Add(textbox);
            form.Controls.Add(label);
            // ... and show the form
            Application.Run(form);
        }
    }
}

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