Question

我在windowform中有这个datagridview，我有一个按钮，它应该向datagridview添加一个新行，所以当我点击它时会打开一个新的窗口表单，如何保存我的数据当前窗口形式并更新datagrid视图？

数据网格从列表中填充，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;

            }

如何保存我在新表单中插入的数据，关闭后，datagridview中会出现一个新行。

请提供任何帮助。

Answer 1

您可以在FormClosing事件中执行此操作。

以下是向数据网格视图添加列，行和单元格的示例。

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>。

将此users变量传递给新表单，并在新表单中更新它。

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(){...});
    }
}

从Windows窗体更新datagridview

2 个答案: