我想从当前月份的Access数据库中导入记录,并且需要将记录显示在我的datagridview
上,表单加载不是按钮单击。我的理由是,如果最终用户打开程序,可能需要一些时间才能加载所有记录,所以我只想检索为当前月份输入的记录,显然是在表单加载时输入的记录。我对编码不熟悉,因此我在这里要求这里的人们带着大量的经验。来自Access MS DB的表查询
我的连接代码如下。
Public Sub GetData()
con.Open()
Dim dt As New DataTable("tbLMPH")
Dim rs As New OleDb.OleDbDataAdapter("SELECT * FROM tbLMPH WHERE Year(IDday) = Year(Now()) AND Month(IDday) = Month(Now())", con) rs.Fill(dt)
DataGridView1.DataSource = dt
DataGridView1.Refresh()
Label1.Text = dt.Rows.Count
rs.Dispose()
con.Close()
If Val(Label1.Text) = 1 Then
Dim i As Integer
i = DataGridView1.CurrentRow.Index
TextBox2.Text = DataGridView1.Item(1, i).Value
TextBox3.Text = DataGridView1.Item(2, i).Value
TextBox4.Text = DataGridView1.Item(3, i).Value
TextBox5.Text = DataGridView1.Item(4, i).Value
TextBox6.Text = DataGridView1.Item(5, i).Value
TextBox7.Text = DataGridView1.Item(6, i).Value
End If
' Display_Data()
End Sub
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Me.TbLMPHTableAdapter.Fill(Me.MaindbDataSet.tbLMPH)
My.Computer.Audio.Play(My.Resources.jimmy2, AudioPlayMode.Background)
Display_Data()
Timer1.Start()
Label2.ForeColor = Color.White
Display_Data()
End Sub
如果您正在尝试导入记录,检索数据的代码在哪里? 而对于一个建议,使用'参数Queries' – Mahadev
公用Sub的GetData() con.Open() 昏暗DT作为新的DataTable( “tbLMPH”) 昏暗RS作为新OleDb.OleDbDataAdapter(“从tbLMPH其中选择* IDday ='”&TextBox1.Text& “””,CON) rs.Fill(DT) DataGridView1.DataSource = DT DataGridView1.Refresh() Label1.Text = dt.Rows.Count rs.Dispose() con.Close() – Jason
如果val(Label1.Text)= 1然后 昏暗我作为整数 I = DataGridView1.CurrentRow.Index TextBox2.Text = DataGridView1.Item(1,i)的。价值 TextBox3.Text = DataGridView1.Item(2,i)的。价值 TextBox4.Text = DataGridView1.Item(3,i)的。价值 TextBox5.Text = DataGridView1.Item(4,i)的。价值 TextBox6.Text = DataGridView1.Item(5,i).Value TextBox7.Text = DataGridView1.Item(6,i).Value End If 'Display_Data() End Sub – Jason