Question

我有两种不同的形式，一种是我生成一个客户列表，另一种是我需要检索添加到列表中的信息。如何将列表传递给我的第二个表单？

这是第一个表格

    List<Customers> new_customer = new List<Customers>();

    private void newCustomer_Load(object sender, EventArgs e)
    {

    }

    private void fNameTxtBox_TextChanged(object sender, EventArgs e)
    {

    }

    private void lNameTxtBox_TextChanged(object sender, EventArgs e)
    {

    }

    private void addressTxtBox_TextChanged(object sender, EventArgs e)
    {

    }

    private void phoneNumTxtBox_TextChanged(object sender, EventArgs e)
    {

    }

    private void emailTxtBox_TextChanged(object sender, EventArgs e)
    {

    }

    private void IDTxtBox_TextChanged(object sender, EventArgs e)
    {

    }


    private void addNewCustButton_Click(object sender, EventArgs e)
    {

        if (fNameTxtBox.Text != "" && lNameTxtBox.Text != "" && addressTxtBox.Text != "" && phoneNumTxtBox.Text != "" && emailTxtBox.Text != "" && IDTxtBox.Text != "")
        {

            new_customer.Add(new Customers { FName = fNameTxtBox.Text, LName = lNameTxtBox.Text, Address = addressTxtBox.Text, phoneNum = phoneNumTxtBox.Text, emailAdd = emailTxtBox.Text, ID = int.Parse(IDTxtBox.Text) });
            MessageBox.Show("Thanks for Registering");
        }

        else
        {
            MessageBox.Show("Customer not added! Please fill out the entire form!");
        }

    }

}

}

这是第二种形式：

namespace WindowsFormsApplication1
{
public partial class Current_Customers : Form
{
    public Current_Customers()
    {
        InitializeComponent();

    }

    private void currCustComboBox_SelectedIndexChanged(object sender, EventArgs e)
    {

    }
  }
}

Answer 1

像这样创建一个form2的新构造函数，同时也以第二种形式创建一个列表。

public partial class Current_Customers : Form
{  
List<Customers> new_customer = new List<Customers>();
public Current_Customers(List<Customers> customers)
{
 new_customer=customers;
}
}

当您在form1中创建此表单的对象时，请执行此操作

 Current_Customers cus=new Current_Customers(new_customer);

这会将列表传递给第二种形式。

Answer 2

您有两种可能的方法。

1）在两个表格上列出公共字段/属性。如果两个表单都存在于同一范围内，则它们可以相互引用。

2）将列表添加到两个表单都可以访问的第三个类，最好是静态类。这将是我个人的偏好。

public static class StaticData
{
    public static readonly List<Customers> _Customers = new List<Customers>();

    public static List<Customers> CustomerList
    {
         get 
         {
            if (_Customers.Count < 1) 
            {
                  //Load Customer data
            }
            return _Customers;
         }
    }
}

public class Form1
{
    private List<Customers> new_customer = null;
    public Form1()
    {
        this.new_customer = StaticData.CustomerList;
    }
}

public class Current_Customers
{
    private List<Customers> new_customer = null;

    public Current_Customers()
    {
        this.new_customer = StaticData.CustomerList;
    }
}

虽然我的例子不是真正的线程安全，而是为了让你指向正确的方向。

如何将一个表单中生成的列表传递给另一个表单（C＃）？

2 个答案: