WinFormscombobox有多列（C＃）？
我目前正在使用以下代码来填充combobox：
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combobox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 ），并在combobox数据绑定中将其用作DisplayMember 。
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";
简单而有效。
它不是开箱即用的.NET（无论是Windows窗体还是asp.net的下拉列表）。请查看此代码项目项目，以获取有关如何构建自己的项目的参考。 （虽然有更多的负载）。
代码项目
有一篇关于Code Project的文章描述了如何创建Multicolumn ComboBox。
Multicolumn Combobox – 代码项目
您不能拥有多列combobox。
你不会更好地使用DataGridView
快速解决方案
据我记得，数据表应该是主题类
- 为数据表MyDataTable.custom.cs创建第二个文件
- 在名为“DisplayProperty”的部分数据表类中添加字符串属性
- 在该属性中返回string.format（“{0} {1} {2}”，Auftragsnummer，Kunde，Beschreibung）;
- 将Datamember绑定到DisplayProperty
MultiColumn ComboBox控件将文本框控件与下拉列表中的网格视图组合在一起以显示数据。