一、将所有控件上的值导出到文件

1.使用递归遍历窗体上所有的TextBox和ComBox，将控件名称和控件的值存入List

实体类Result.cs

/// <summary>
/// 结果数据
/// </summary>
public class Result
{
/// <summary>
/// 文本框名称
/// </summary>
public string TextBoxName { get; set; }

/// <summary>
/// 文本框的值
/// </summary>
public string TextBoxValue { get; set; }
}

递归获取想要的控件

        private void GetAllTextAndCombox(Control controls)
        {
            foreach (Control control in controls.Controls)
            {
                if (control is TextBox || control is ComboBox)
                {
                    AllControls.Add(control);
                }
                if (control.Controls.Count > 0)
                {
                    GetAllTextAndCombox(control);
                }
            }
        }

获取控件的名称和值

            List<Result> Results=new List<Result>();
            for (int i = 0; i < AllControls.Count; i++)
            {
                Result result = new Result();
                result.TextBoxName = AllControls[i].Name;
                result.TextBoxValue = AllControls[i].Text;
                Results.Add(result);
            }

2.将实体序列化成字符串，保存字符串

if (Results.Count > 0)
            {
                string Resultstr = JsonConvert.SerializeObject(Results);
                if (string.IsNullOrEmpty(Resultstr)) return;
                SaveFileDialog saveFile = new SaveFileDialog();
                saveFile.Title = "请选择保存文件路径";
                saveFile.Filter = "数据文件(*.Single)|*.Single";
                saveFile.OverwritePrompt = true;  //是否覆盖当前文件
                saveFile.RestoreDirectory = true;  //还原目录
                if (saveFile.ShowDialog() == DialogResult.OK)
                {
                    if (!File.Exists(saveFile.FileName))
                    {
                        using (File.Create(saveFile.FileName)) { }
                    }
                    using (StreamWriter sw = new StreamWriter(saveFile.FileName, false))
                    {
                        sw.Write(Resultstr);
                        sw.Close();//写入
                        MessageBox.Show("已保存！");
                    }
                }
            }

二、从文件导入所有控件的值

读取文件内容，反序列化成实体，循环给控件赋值。

            OpenFileDialog openFile = new OpenFileDialog();
            openFile.Title = "请选择保存文件路径";
            openFile.Filter = "数据文件(*.Single)|*.Single";
            openFile.Multiselect = false;
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                using (StreamReader sr = new StreamReader(openFile.FileName))
                {
                    string Resultstr = sr.ReadToEnd();
                    if (string.IsNullOrEmpty(Resultstr)) return;
                    Results = JsonConvert.DeserializeObject<List<Result>>(Resultstr);
                    if (Results.Count <= 0) return;
                    for (int i = 0; i < Results.Count; i++)
                    {
                        Control ct = AllControls.Where(o => o.Name == Results[i].TextBoxName).FirstOrDefault();
                        if (ct != null)
                        {
                            ct.Text = Results[i].TextBoxValue;
                        }
                    }
                    sr.Close();
                }
            }