從WindowForm更新datagridview

Question

我在窗口窗體中有這個datagridview，我確實有一個按鈕應該向datagridview添加新行，所以當我單擊它時它會打開一個新的窗口窗體，我該如何保存當前窗口窗體中的數據並更新數據網格視圖？

從列表中填充數據網格，如下所示：

 public void GetUserDetails()
        {   
                        List<xml.UserDescriptor> users = new List<xml.UserDescriptor>();
                        foreach (xml.UserDescriptor dbList in xmlData.Users)
                        {
                            if (dbList.DatabaseDescriptorName == name)
                            {
                                users.Add(new xml.UserDescriptor() { DatabaseDescriptorName = dbList.DatabaseDescriptorName, Username = dbList.Username, Password = dbList.Password, IsAdmin = dbList.IsAdmin });

                            }
                        }

                        dataGridView3.DataSource = users;

            }

如何保存在新表格中插入的數據，並在關閉表格后在datagridview中出現新的一行。

請任何幫助將不勝感激。

Answer 1

您可以在FormClosing事件中執行此操作。

這是將列，行和單元格添加到datagridview的示例。

Option Strict On
Option Explicit On
Option Infer Off
Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        DataGridView1.Columns.Add(New DataGridViewTextBoxColumn)
        DataGridView1.Columns.Add(New DataGridViewTextBoxColumn)
        DataGridView1.Columns.Add(New DataGridViewTextBoxColumn)
        DataGridView1.Columns.Add(New DataGridViewTextBoxColumn)
        For i As Integer = 0 To 100 Step 4
            Dim row As New DataGridViewRow
            Dim cell1 As New DataGridViewTextBoxCell
            Dim cell2 As New DataGridViewTextBoxCell
            Dim cell3 As New DataGridViewTextBoxCell
            Dim cell4 As New DataGridViewTextBoxCell
            cell1.Value = i.ToString
            cell2.Value = (i + 1).ToString
            cell3.Value = (i + 2).ToString
            cell4.Value = (i + 3).ToString
            row.Cells.AddRange({cell1, cell2, cell3, cell4})
            DataGridView1.Rows.Add(row)
        Next
    End Sub
End Class

Answer 2

使用BindingList<xml.UserDescriptor> ，而不是List<xml.UserDescriptor> 。

將此users變量傳遞給新表單，然后在新表單中對其進行更新。

MainForm.cs

new NewForm(users).ShowDialog();

NewForm.cs

public class NewForm : Form
{
    BindingList<xml.UserDescriptor> _users;
    public NewForm(BindingList<xml.UserDescriptor> users)
    {
        _users = users;
    }

    private void btnAddUser_Click(object sender, EventArgs e)
    {
       _users.Add(new xml.UserDescriptor(){...});
    }
}