sql - 在 vb.net 中向 datagridview 添加更多行

Question

Private Sub btnAddSub_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAddSub.Click

    Dim comboboxvalue As String
    comboboxvalue = "'" & CBClass.SelectedItem & "'"
    Dim sql As String
    sql = "Select * From class Where ClassCode=" & comboboxvalue
    Dim connString As String = "Provider=Microsoft.ACE.OLEDB.12.0; Data Source=H:\ProjectDatabase.mdb"
    Dim MyConn As OleDbConnection
    Dim da As OleDbDataAdapter
    Dim ds As DataSet
    Dim tables As DataTableCollection
    Dim source1 As New BindingSource

    MyConn = New OleDbConnection
    MyConn.ConnectionString = connString
    ds = New DataSet
    tables = ds.Tables
    da = New OleDbDataAdapter(sql, MyConn)
    da.Fill(ds, "Class")
    Dim view As New DataView(tables(0))
    source1.DataSource = view
    Form1.dgv.DataSource = view

End Sub

我目前可以将一条数据添加到数据网格。当我尝试添加第二条数据时，它会替换当前存储的数据。

我该怎么做才能在添加更多数据时换行。

Answer 1

您提供的源代码看起来很像您只是在每次单击 btnAddSub 时刷新 DGV 的数据源，每次都分配给 form1.dgv.datasource。如果您只想将新行附加到 DGV，则需要通过向其添加 DataGridViewRow 对象来操作 DGV.Rows 集合。