当我在另一种形式的datagridview中编辑数据时，如何修复所有内容都被清除？

Private Sub btnAddNew_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles SaveBtn.Click 'Try If Not IsNumeric(txtUnit.Text) Then MsgBox("Enter Unit Number.", MsgBoxStyle.Critical, "LASAC") Exit Sub ElseIf txtName.Text = "" Then MsgBox("Enter Name.", MsgBoxStyle.Critical, "LASAC") Exit SubPrivate Sub btnAddNew_Click(ByVal sender As Sys