التعديل على كود ملأ الدتا جريد فيو

السلام عليكم

ممكن مساعدة :

Dim word As String = encrypt(TextBox5.Text.Trim)
        Dim a As String = Format(DateTimePicker1.Text, "dd/mm/yyyy")
        '   Using databch As New OleDbDataAdapter("SELECT * FROM low6 where a6 like '%" & word & "%' and a3= '" & TextEdit6.Text.Trim & "' and a4= '" & TextEdit5.Text.Trim & "'", ConStr)
        Dim sql As String = String.Format("SELECT distinct a2 FROM low6 where a6 like '%{0}%'", word)

        If String.IsNullOrEmpty(TextBox6.Text.Trim) Then
            sql = sql
        Else
            sql = String.Format("{0} and a3= '{1}'", sql, TextBox6.Text.Trim)
        End If

        If String.IsNullOrEmpty(TextBox7.Text.Trim) Then
            sql = sql
        Else
            sql = String.Format("{0} and a4= '{1}'", sql, TextBox7.Text.Trim)
        End If

        If String.IsNullOrEmpty(DateTimePicker1.Text.Trim) Or String.IsNullOrEmpty(DateTimePicker2.Text.Trim) Then
            sql = sql
        Else
            sql = String.Format("{0}and a5 >= #{1}# and a5 <= #{2}#", sql, DateTimePicker1.Text.Trim, DateTimePicker2.Text.Trim)
        End If
         Dim datasrech As New DataSet
        Dim datasrech2 As New DataSet
        Label9.Text = "0"

        Using databch As New OleDbDataAdapter(sql, ConStr1)
            datasrech.Clear()
            databch.Fill(datasrech, "treserch")

            If Me.BindingContext(datasrech, "treserch").Count = 0 Then
                TreeView5.Nodes.Clear()
                MsgBox("لم يتم العثور على شيء", 48 + 524288, "البحث")
                Exit Sub
            End If
            Label9.Visible = True
            Label9.Text = Me.BindingContext(datasrech, "treserch").Count
        End Using
        ProgressBar1.Visible = True
        ProgressBar1.Minimum = 0
        ProgressBar1.Maximum = Val(Label9.Text) + 1
        ProgressBar1.Value = 0
        Dim dv1 As DataView = datasrech.Tables("treserch").DefaultView

        TreeView5.Nodes.Clear()
        For Each drLine As DataRowView In dv1

            Dim id_sharh As Integer = drLine("a2").ToString
            Using datab4 As New OleDbDataAdapter("SELECT * FROM low5 where id = " & id_sharh & "", ConStr1)

                datasrech2.Clear()
                datab4.Fill(datasrech2, "low5")
                Dim dv12 As DataView = datasrech2.Tables("low5").DefaultView
                For Each drLine2 As DataRowView In dv12
                    Dim MainHeader As New TreeNode(drLine2("a6").ToString())
                    MainHeader.Tag = drLine2("key").ToString
                    MainHeader.Name = drLine2("key").ToString
                    '  MainHeader.ForeColor = Color.Red
                    TreeView5.Nodes.Add(MainHeader)

                    Application.DoEvents()
                Next
            End Using

        Next
        TreeView5.EndUpdate()

هذا الكود وظيفته البحث فى قاعدة البيانات وعرض النتائج فى treeview

ارجو المساعدة فى التعديل على الكود حتى يكون العرض فى الدتا جريد فيو دون استخدام جملة for each لانها تأخذ وقت طويل فى عرض البيانات

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