我在一个窗体中有这个数据网格视图,我有一个按钮,应该向数据网格视图添加一个新行,所以当我点击它时,它会打开一个新的窗体,我如何保存当前窗体中的数据并更新数据网格视图?
数据网格是从一个列表中填充的,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,并在关闭后在datagridview中显示一个新行。
请提供任何帮助,我们将不胜感激。
使用BindingList<xml.UserDescriptor>
,而不是List<xml.UserDescriptor>
。
将此users
变量传递到新表单,并在新表单中更新它。
主窗体.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(){...});
}
}
您可以在FormClosing事件中执行此操作。
下面是一个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