伊のspace～芳香精油＊美容保養＊程式設計

說明：
1.拖曳SqlDataSource至頁面，設定好SQL語法。
2.拖曳GridView至頁面，設定來源為SqlDataSource。
3.請於GridView_PreRender加入以下程式碼。

Protected Sub GridView1_PreRender(ByVal sender As Object, ByVal e As System.EventArgs) Handles GridView1.PreRender
    Dim i As Integer = 1
    Dim mySingleRow As GridViewRow

    For c As Short = 0 To GridView1.Columns.Count - 1
        i = 1
        For Each mySingleRow In GridView1.Rows
            If mySingleRow.RowIndex = 0 Then
                mySingleRow.Cells(c).RowSpan = 1
            Else
                If mySingleRow.Cells(c).Text.Trim() = _
                GridView1.Rows(mySingleRow.RowIndex - i).Cells(c).Text.Trim() Then
                    GridView1.Rows(mySingleRow.RowIndex - i).Cells(c).RowSpan += 1
                    i = i + 1
                    mySingleRow.Cells(c).Visible = False
                Else
                    GridView1.Rows(mySingleRow.RowIndex).Cells(c).RowSpan = 1
                    i = 1
                End If
            End If
        Next
    Next
End Sub

補充：
如使用程式碼指派DataSource給GridView，如下：
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
    Dim sqlselect As String
    sqlselect = "SELECT * FROM TABLE"
    Dim dt1 As New Data.DataTable
    dt1 = db1.GetDataTable(sqlselect)
    GridView1.DataSource = dt1
    GridView1.DataBind()
End Sub

則GridView_PreRender內無法使用：For c As Short = 0 To GridView1.Columns.Count - 1
GridView1.Columns.Count抓不到值，需自行指派一個整數，例如：For c As Short = 0 To 2


效果示意圖：