WinForms组合框有多列(C#)？

我目前使用以下代码填充组合框:

combobox.DataSource = datatable;
combobox.DisplayMember = "Auftragsnummer";
combobox.ValueMember = "ID";

有没有办法显示多个列.我为DisplayMember尝试了"Auftragsnummer,Kunde,Beschreibung",但它没有用.

您不能拥有多个列.虽然您可以将多个字段连接为显示成员

检查: 如何绑定组合,以便显示成员是源数据表的2个字段的连续？

MSDN上有一篇文章描述了如何创建Multicolumn ComboBox.

如何在Windows窗体中为组合框创建多列下拉列表

http://support.microsoft.com/kb/982498

来自上面的Microsoft Link的VB下载源代码,可以很容易地适应ListBox和ComboBox:

'************************************* Module Header **************************************'
' Module Name:  MainForm.vb
' Project:      VBWinFormMultipleColumnComboBox
' Copyright (c) Microsoft Corporation.
' 
' 
' This sample demonstrates how to display multiple columns of data in the dropdown of a ComboBox.
' 
' This source is subject to the Microsoft Public License.
' See http://www.microsoft.com/opensource/licenses.mspx#Ms-PL.
' All other rights reserved.
' 
' THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND,
' EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
' WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A PARTICULAR PURPOSE.
'******************************************************************************************'

Imports System
Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Linq
Imports System.Text
Imports System.Windows.Forms
Imports System.Drawing.Drawing2D

Public Class MainForm

    Private Sub MainForm_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim dtTest As DataTable = New DataTable()
        dtTest.Columns.Add("ID", GetType(Integer))
        dtTest.Columns.Add("Name", GetType(String))

        dtTest.Rows.Add(1, "John")
        dtTest.Rows.Add(2, "Amy")
        dtTest.Rows.Add(3, "Tony")
        dtTest.Rows.Add(4, "Bruce")
        dtTest.Rows.Add(5, "Allen")

        ' Bind the ComboBox to the DataTable
        Me.comboBox1.DataSource = dtTest
        Me.comboBox1.DisplayMember = "Name"
        Me.comboBox1.ValueMember = "ID"

        ' Enable the owner draw on the ComboBox.
        Me.comboBox1.DrawMode = DrawMode.OwnerDrawFixed
        ' Handle the DrawItem event to draw the items.
    End Sub

    Private Sub comboBox1_DrawItem(ByVal sender As System.Object, _
                                   ByVal e As System.Windows.Forms.DrawItemEventArgs) _
                                   Handles comboBox1.DrawItem
        ' Draw the default background
        e.DrawBackground()

        ' The ComboBox is bound to a DataTable,
        ' so the items are DataRowView objects.
        Dim drv As DataRowView = CType(comboBox1.Items(e.Index), DataRowView)

        ' Retrieve the value of each column.
        Dim id As Integer = drv("ID").ToString()
        Dim name As String = drv("Name").ToString()

        ' Get the bounds for the first column
        Dim r1 As Rectangle = e.Bounds
        r1.Width = r1.Width / 2

        ' Draw the text on the first column
        Using sb As SolidBrush = New SolidBrush(e.ForeColor)
            e.Graphics.DrawString(id, e.Font, sb, r1)
        End Using

        ' Draw a line to isolate the columns 
        Using p As Pen = New Pen(Color.Black)
            e.Graphics.DrawLine(p, r1.Right, 0, r1.Right, r1.Bottom)
        End Using

        ' Get the bounds for the second column
        Dim r2 As Rectangle = e.Bounds
        r2.X = e.Bounds.Width / 2
        r2.Width = r2.Width / 2

        ' Draw the text on the second column
        Using sb As SolidBrush = New SolidBrush(e.ForeColor)
            e.Graphics.DrawString(name, e.Font, sb, r2)
        End Using
    End Sub
End Class

您可以向数据集添加虚拟列(Description),并DisplayMember在组合框数据绑定中使用它.

SELECT Users.*, Surname+' '+Name+' - '+UserRole AS Description FROM Users

ComboBox.DataBindings.Add(new Binding("SelectedValue", bs, "ID"));
ComboBox.DataSource = ds.Tables["Users"];
ComboBox.DisplayMember = "Description";
ComboBox.ValueMember = "ID";