Datagrid中的Combobox視圖vb.net

Question

我知道這個問題太老了，已經被問過這么多次了，但我找不到我想要的確切內容。 我曾經有一些組合框和文本框，用戶將填寫並逐個選擇數據，在最后一個框的輸入按下，所有數據都作為新行添加到數據網格。 現在我想要的是讓我的數據網格中的第一行替換所有這些框。 但我已經停留在第一項。

我希望第一列是組合框，但它根據我編寫的查詢從SQL數據庫中獲取其值。 在組合框中我想鍵入我想要搜索和選擇的內容（作為普通組合框中的下拉樣式）。

---

類似下面的代碼，但對於datagridview中的組合框。

 Dim sqlquery = " SELECT  m.accno,m.accname
              FROM masteraccount m
              where accname like '%TextBox3.Text%'
                    or accno like '%TextBox3.Text%'  "

        Using comm As SqlCommand = New SqlCommand(sqlquery, SQL.SQLCon)
            Dim rs As SqlDataReader = comm.ExecuteReader
            Dim dt As DataTable = New DataTable
            dt.Load(rs)
            ListBox1.DataSource = dt
            ComboBox1.DisplayMember = "acc"
            ComboBox1.ValueMember = "acc"

        End Using 

Answer 1

我根據您的要求更改了代碼。 當您從組合框中鍵入或選擇項目時，它會填充其他單元格。 兩種方法都具有相同的功能。 檢查下面的修改代碼。

Private Sub FillComboBox()
    If cn.State = ConnectionState.Open Then cn.Close()
    cn.ConnectionString = "Provider = Microsoft.ACE.OLEDB.12.0;Data Source=C:\Users\Juan\Documents\NorthwindSample.accdb;Persist Security Info=False;"
    cn.Open()

    cmb.Name = "cmb"
    cmb.HeaderText = "Employee"

    'query that retrieves all the employee names
    Dim sqlquery As String = "Select [last name] & ' ' &  [first name] as Name " &
             "From employees order by [last name]"

    'add the query results to the combobox cell in datagridview
    Using comm As OleDbCommand = New OleDbCommand(sqlquery, cn)
        Dim rs As OleDbDataReader = comm.ExecuteReader
        dtable = New DataTable
        dtable.Load(rs)
        cmb.DataSource = dtable
        cmb.DisplayMember = dtable.Columns.Item(0).ColumnName
        cmb.ValueMember = dtable.Columns.Item(0).ColumnName
        DataGridView1.Columns.Add(cmb)
    End Using

    'create other columns
    CreateColumns()
End Sub
'Procedure to fill the other cells
Sub FillCells(cmbValue As String, conn As OleDbConnection)

    'query that retrieves the rest of the fields that matches with the combobox value
    Dim sqlquery2 As String = "Select [Last Name] & ' ' & [First Name] as Name, [e-mail address], [job title], city 
          From employees
    Where [Last Name] & ' ' & [First Name] = '" & cmbValue & "'"

    'Assigns query results to datatable 
    Using comm2 As OleDbCommand = New OleDbCommand(sqlquery2, conn)
        Dim rs As OleDbDataReader = comm2.ExecuteReader
        Dim dt As DataTable = New DataTable
        dt.Load(rs)

        'creates a datarow for the datatable
        Dim dtRow As DataRow

        Dim email As String = ""
        Dim jobtitle As String = ""
        Dim city As String = ""

        'assigns datarow items to variables

        For Each dtRow In dt.Rows

            dtRow.Field(Of String)(dt.Columns.Item(1))
            email = dtRow.Item(1)
            jobtitle = dtRow.Item(2)
            city = dtRow.Item(3)

        Next

        'assigns the index of the current row to the variable
        Dim currentRow As Integer

        currentRow = DataGridView1.CurrentRow.Index

        'fills the cells with the values
        DataGridView1.Item(1, currentRow).Value = email
        DataGridView1.Item(2, currentRow).Value = jobtitle
        DataGridView1.Item(3, currentRow).Value = city
        dt = Nothing
    End Using

End Sub

Private Sub DataGridView1_EditingControlShowing(sender As Object, 
        e As DataGridViewEditingControlShowingEventArgs) Handles DataGridView1.EditingControlShowing

    'REMEMBER TO CHANGE THE COLUMN INDEX NUMBER TO YOUR COMBOBOX INDEX!!
    If DataGridView1.CurrentCell.ColumnIndex = 0 Then
        Dim combo As ComboBox = CType(e.Control, ComboBox)
        combo.DropDownStyle = ComboBoxStyle.DropDown

        If (combo IsNot Nothing) Then
            ' Remove an existing event-handler, if present, to avoid adding multiple handlers when the editing control is reused.
            RemoveHandler combo.SelectionChangeCommitted, New EventHandler(AddressOf ComboBox_SelectionChangeCommitted)
            RemoveHandler combo.TextChanged, New EventHandler(AddressOf ComboBox_TextChanged)
            RemoveHandler combo.KeyDown, New KeyEventHandler(AddressOf ComboBox_KeyDown)

            ' Add the event handler.
            AddHandler combo.SelectionChangeCommitted, New EventHandler(AddressOf ComboBox_SelectionChangeCommitted)
            AddHandler combo.TextChanged, New EventHandler(AddressOf ComboBox_TextChanged)
            AddHandler combo.KeyDown, New KeyEventHandler(AddressOf ComboBox_KeyDown)
        End If
    End If
End Sub

Private Sub ComboBox_SelectionChangeCommitted(ByVal sender As System.Object, ByVal e As System.EventArgs)
    Dim combo As ComboBox = CType(sender, ComboBox)
    FillCells(combo.Text, cn)
End Sub
Private Sub ComboBox_TextChanged(sender As Object,
                 e As EventArgs)
    Dim combo As ComboBox = CType(sender, ComboBox)
    FillCells(combo.Text, cn)
End Sub

Private Sub ComboBox_KeyDown(ByVal sender As Object, ByVal e As KeyEventArgs)
    Select Case (e.KeyCode)
        Case Keys.Tab
            e.Equals(Keys.Return)
    End Select
End Sub