设置个PUBLIC全局变量 A窗体
int index1 = 0;//dataGridView1中ID列的索引
string Id = dataGridView2[index1, dataGridView2.SelectedCells[0].RowIndex].Value.ToString();
B b=new B(id)
b.show();
public class UserInfo
{
public string _userName;
public string _userPassword;
public UserInfo(string userName,string userPassword)
{
_userName=userName;
_userPassword = userPassword;
}
}
UserInfo userInfo = new UserInfo("张三","123456");
AppDomain.CurrentDomain.SetData("UserInfo",userInfo)