DataGridView如何实现列标头带数据筛选功能，就象Excel高级筛选功能一样

'近日有本论坛网友问：DataGridView如何实现列标头带数据筛选功能，就象Excel高级筛选功能一样

'今晚正好闲着没事，加之以前也没用到过这个需求，所以就写了个模拟功能，供各位坛友酌情参考。

'VB.NET 2008 环境

'新建一个项目后，只需在Form1中拉一个DataGridView，一个ComboBox，然后将下面代码复制粘贴即可，其它什么也不用做

Public Class Form1

    Dim SelectedCol As Integer = 0, IsFindit As Boolean = True

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

        DataGridView1.ColumnCount = 6

        DataGridView1.Rows.Add(10)

        DataGridView1.AllowUserToAddRows = False

        For i As Integer = 0 To Me.DataGridView1.Columns.Count - 1

            Me.DataGridView1.Columns(i).SortMode = DataGridViewColumnSortMode.NotSortable

        Next

        '以下所有代码只是为了添加演试数据需要

        For i = 0 To DataGridView1.RowCount - 1

            For j As Integer = 0 To DataGridView1.ColumnCount - 1

                DataGridView1.Columns(j).HeaderText = "第 " & j.ToString & " 列"

                DataGridView1.ColumnHeadersDefaultCellStyle.Alignment = DataGridViewContentAlignment.MiddleCenter

                DataGridView1.Rows(i).Cells(j).Value = (i + 5) * (j + 2)

            Next

            If i Mod 2 = 0 Then

                DataGridView1.Rows(i).Cells(2).Value = "ds"

            Else

                DataGridView1.Rows(i).Cells(3).Value = "测试一下"

            End If

        Next

    End Sub

    Private Sub DataGridView1_ColumnHeaderMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellMouseEventArgs) _

        Handles DataGridView1.ColumnHeaderMouseClick

        '这里是模拟EXCEL排序的关键部分

        SelectedCol = e.ColumnIndex

        Dim range As New System.Drawing.Rectangle

        Dim dLeft, dTop As Double

        range = DataGridView1.GetCellDisplayRectangle(e.ColumnIndex, e.RowIndex, False)

        dLeft = range.Left + DataGridView1.Left

        dTop = range.Top + DataGridView1.Top

        ComboBox1.SetBounds(dLeft, dTop, range.Width, range.Height)

        ComboBox1.Items.Clear()

        ComboBox1.DropDownStyle = ComboBoxStyle.DropDownList

        ComboBox1.Items.Add("请选择排序")

        For i As Integer = 0 To DataGridView1.RowCount - 1

            IsFindit = False

            For j = 0 To ComboBox1.Items.Count - 1

                If ComboBox1.Items(j).ToString = DataGridView1.Rows(i).Cells(e.ColumnIndex).Value.ToString Then

                    IsFindit = True

                    j = ComboBox1.Items.Count

                End If

            Next

            If Not IsFindit Then ComboBox1.Items.Add(DataGridView1.Rows(i).Cells(e.ColumnIndex).Value.ToString)

        Next

        ComboBox1.SelectedIndex = 0

        ComboBox1.Show()

    End Sub

    Private Sub ComboBox1_SelectedIndexChanged(ByVal sender As Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged

        '这里是筛选功能

        Select Case ComboBox1.SelectedIndex

            Case 0

                For i As Integer = 0 To DataGridView1.RowCount - 1

                    DataGridView1.Rows(i).Visible = True

                Next

            Case Else

                For i As Integer = 0 To DataGridView1.RowCount - 1

                    If DataGridView1.Rows(i).Cells(SelectedCol).Value.ToString <> ComboBox1.SelectedItem.ToString Then

                        DataGridView1.Rows(i).Visible = False

                    Else

                        DataGridView1.Rows(i).Visible = True

                    End If

                Next

        End Select

        If ComboBox1.SelectedIndex = 0 Then ComboBox1.Hide()

    End Sub

End Class

[VB.net]DataGridView实现列标头

不说也罢 张贴于 2013年5月31日 20:02

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