您需要做的是在第二个窗体中创建第二个构造函数，该构造函数接受一个对象作为参数…就我所关心的而言，它可能是整个Form1对象实例，然后您可以从中获取任何内容。将该对象保留为第二种形式，然后根据需要进行修改。完成第二个表单后，第一个表单将具有该数据，并且在第二个表单关闭后，您可以执行任何“刷新”操作。

public partial class YourSecondForm : Form
{
    object PreserveFromFirstForm;

    public YourSecondForm()
    {
       ... its default Constructor...
    }

    public YourSecondForm( object ParmFromFirstForm ) : this()
    {
       this.PreserveFromFirstForm = ParmFromFirstForm;
    }

    private void YourSecondFormMethodToManipulate()
    {
       // you would obviously have to type-cast the object as needed
       // but could manipulate whatever you needed for the duration of the second form.
       this.PreserveFromFirstForm.Whatever = "something";
    }


}