C# 怎么讓winform程序中的輸入文本框保留上次的輸入

選中TextBox控件，在屬性窗格中找到(ApplicationSettings)，然后設置它。

綁定配置文件

 

 

 

        private Settings settings = new Settings();

        private void MainForm_Load(object sender, EventArgs e)
        {
            this.txtTargetInitialCatalog.Text = settings.sadbname;
        }

        private void MainForm_FormClosing(object sender, FormClosingEventArgs e)
        {
            settings.sadbname = this.txtTargetInitialCatalog.Text;
            settings.Save();
        }