如何用c#實現combobox下拉多列數據顯示與選擇

呵呵用ComponentOne组件里的C1Combox

找现成的
http://www.codeproject.com/vb/net/multicolumncombo.asp
codeproject上有的是

謝謝各位哥哥姊姊的幫忙,我找到響應的網站了;
我的MSN:[email protected]

有沒有用中文寫的ComponentOne组件说明阿,我英文水平很菜!

我给你一个例子。
using System;
using System.Collections;
using System.Data;
using System.Drawing;
using System.Windows.Forms;namespace EBright.Learn.Form.ComboBoxL
{
/// <summary>
/// Summary description for ComboBoxL.
/// 存在的问题：
/// - 刚进入时，输入汉字检索，不能执行
/// - 过滤时，下来操作执行两次
/// - 输入的过滤字母，只能输入一个，汉字只能一次输入
/// </summary>
public class ComboBoxL:ComboBox
{
#region variables
private System.ComponentModel.Container components = null;
//确定哪些列显示出来
private int[] _displayColumns = null;
//计算显示列的显示宽度
private int[] _displayWidths = null;
//确定过滤的列
private int[] _filterColumns = new int[]{0} ;
//数据表
private DataTable _dtSource = null;
//显示的数据行
private DataRow[] _drDisplay = null;
//是否是第一次初始化items
private bool _needInitItem = true;
//列与列之间的间隙
private int _columnSpacing = 4;
private bool _dropDownOnSuggest = true;
private bool _outerTextChanged = false; #endregion
public ComboBoxL()
{
if(components == null)
components = null;
this.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable ;
} #region Component Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
} #endregion

#region events inherited from ComboBox
protected override void OnDrawItem(DrawItemEventArgs e)
{
try
{
_outerTextChanged = false;
int iIndex = e.Index;
if(iIndex >= _drDisplay.Length)
return;
if(iIndex > -1)
{
int iXPos = 0;
int iYPos = 0; if(_drDisplay.Length == 0)
return;
e.DrawBackground();
for(int index = 0; index < _dtSource.Columns.Count; index++)
{
if(!this.ColumnIsDisplay(index,_displayColumns))
continue;
int idwIndex = GetColumnIndexOfArray(_displayColumns,index);
int idw = idwIndex==-1?80:_displayWidths[idwIndex];
e.Graphics.DrawString(_drDisplay[iIndex][index].ToString(), Font, new SolidBrush(e.ForeColor), new RectangleF(iXPos, e.Bounds.Y, idw, ItemHeight));
iXPos += idw + _columnSpacing ;
}
iXPos = 0;
iYPos += ItemHeight;
e.DrawFocusRectangle();
base.OnDrawItem(e);
_outerTextChanged = true;
}
}
catch(Exception ex)
{
throw new Exception(ex.Message + "\r\nIn ColumnComboBox.OnDrawItem(DrawItemEventArgs).");
}
} protected override void OnDropDown(EventArgs e)
{
if(_needInitItem)
InitItems();//2006-09-21 10:12 add
InitDisplay();//2006-09-21 11:50 add
base.OnDropDown (e);
}
/*protected override void OnDropDownStyleChanged(EventArgs e)
{
if(DroppedDown)
{

}
base.OnDropDownStyleChanged (e);
}*/ protected override void OnTextChanged(EventArgs e)
{
base.OnTextChanged (e);
if(Text == "'")
return;
_needInitItem = true;
DroppedDown = false;
if(_dropDownOnSuggest && !DroppedDown&&_outerTextChanged)
DroppedDown = true;
}
protected override void OnKeyDown(KeyEventArgs e)
{
base.OnKeyDown (e);
if(e.KeyCode == Keys.Escape ||//上面的控制键
e.KeyCode == Keys.F1   ||
e.KeyCode == Keys.F2  ||
e.KeyCode == Keys.F3  ||
e.KeyCode == Keys.F4   ||
e.KeyCode == Keys.F5  ||
e.KeyCode == Keys.F6  ||
e.KeyCode == Keys.F7  ||
e.KeyCode == Keys.F8||
e.KeyCode == Keys.F9 ||
e.KeyCode == Keys.F10 ||
e.KeyCode == Keys.F11 ||
e.KeyCode == Keys.F12 ||
e.KeyCode == Keys.Tab ||//左面及下面
e.KeyCode == Keys.CapsLock||
e.KeyCode == Keys.ShiftKey ||
e.KeyCode == Keys.ControlKey ||
e.KeyCode == Keys.Alt||
e.KeyCode == Keys.Space ||
e.KeyCode == Keys.Menu ||
e.KeyCode == Keys.PrintScreen  ||//小键盘
e.KeyCode == Keys.Scroll ||
e.KeyCode == Keys.Pause ||
e.KeyCode == Keys.Insert ||
e.KeyCode == Keys.Home ||
e.KeyCode == Keys.PageUp ||
e.KeyCode == Keys.End ||
e.KeyCode == Keys.PageDown ||
e.KeyCode == Keys.Up ||
e.KeyCode == Keys.Down  ||
e.KeyCode == Keys.Left ||
e.KeyCode == Keys.Right ||
e.KeyCode == Keys.NumLock ||
e.KeyCode == Keys.Enter
)
return;
if((e.KeyCode == Keys.ProcessKey&& (Text == "" || SelectedText == Text)))
return;
_outerTextChanged = true;
if(this.SelectedText == Text)
Text = e.KeyData .ToString();
}
#endregion #region Property
public int[] DisplayColumns
{
get{return _displayColumns;}
set{_displayColumns = value;}
}
public DataTable Data
{
get{return _dtSource ;}
set
{
_outerTextChanged = true;
DataSource = value;
_dtSource = value;
_outerTextChanged = false;
}
}
public int[] FilterColumns
{
get{return _filterColumns ;}
set{_filterColumns = value;}
}
public bool DropDownOnSuggest
{
get{return _dropDownOnSuggest;}
set{_dropDownOnSuggest = value;}
}
#endregion #region private methods
private bool ColumnIsDisplay(int column,int[] columns)
{
if(column< 0)
throw new Exception("column must be greater than 0.\r\n(private method)ColumnIsDisplay(int,int[])") ;
if(columns == null)
{
columns = new int[1] ;
columns[0] = 0;
}
else if(_dtSource != null)
{
if(columns.Length > _dtSource.Columns.Count)
throw new Exception("DisplayColumns' count cannot be greater than count of datasource.\r\n(private method)ColumnIsDisplay(int,int[])") ;
}
foreach(int c in columns)
{
if(c == column)
return true;
}
return false;
}
private int GetColumnIndexOfArray(int[] columns,int column)
{
int iResult = -1;
if(column< 0)
throw new Exception("column must be greater than 0.\r\n(private method)ColumnIsDisplay(int,int[])") ;
if(_dtSource != null)
{
if(columns.Length > _dtSource.Columns.Count)
throw new Exception("DisplayColumns' count cannot be greater than count of datasource.\r\n(private method)ColumnIsDisplay(int,int[])") ;
}
for(int c = 0;c<columns.Length;c++)
{
if(columns[c] == column)
return c;
}
return iResult;
}
private void InitDisplay()
{
_displayWidths = new int[_displayColumns.Length>0?_displayColumns.Length:1] ;
SizeF size = new SizeF(10000,ItemHeight) ;
Graphics graphics = CreateGraphics();
foreach(DataRow dr in this._drDisplay)
{
for(int i = 0;i<this._dtSource.Columns.Count ;i++)
{
int iexist = this.GetColumnIndexOfArray(_displayColumns,i);
if(iexist != -1)
{
string stmp = dr[i].ToString() ;
int itmpwidth = (int)graphics.MeasureString(stmp,Font,size).Width ;
if(itmpwidth > _displayWidths[iexist])
_displayWidths[iexist] = itmpwidth;
}
}
}
for(int w = 0;w < _displayWidths.Length ;w++)
{
_displayWidths[w] += _columnSpacing;
}
DropDownWidth = 1;
}
private void InitItems()
{
string text = this.Text;
ArrayList al = new ArrayList() ;
al.Add(_dtSource.Rows[0]);
for(int f = 0;f<this._filterColumns.Length;f++)
{
string fcn = _dtSource.Columns[_filterColumns[f]].ColumnName ;
DataRow[] drs = _dtSource.Select(fcn+" like '"+text+"%'") ;
foreach(DataRow dr in drs)
{
if(!al.Contains(dr))
al.Add(dr);
}
DataRow[] drs2 = _dtSource.Select(fcn+" like '_"+text+"%'") ;
foreach(DataRow dr in drs2)
{
if(!al.Contains(dr))
al.Add(dr);
}
DataRow[] drs3 = _dtSource.Select(fcn+" like '%"+text+"%'") ;
foreach(DataRow dr in drs3)
{
if(!al.Contains(dr))
al.Add(dr);
}
}
_drDisplay = new DataRow[al.Count] ;
al.CopyTo(_drDisplay) ;
//将过滤后的数据，赋给DataSource,2006-09-21 10:08
DataTable dt = this._dtSource.Clone() ;
foreach(DataRow dr in _drDisplay)
{
dt.ImportRow(dr) ;
}
_outerTextChanged = false;//2006-09-21 13:06
DataSource = dt;
_outerTextChanged = true;
}
#endregion
}
}

上面代码是重写了ComboBox的一些事件，ComboBoxL.cs
下面是调用示例：
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace EBright.Learn.Test_ComboBoxL
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private EBright.Learn.Form.ComboBoxL.ComboBoxL comboBoxL1;
private System.Windows.Forms.ComboBox comboBox1;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.Container components = null; public Form1()
{
//
// Required for Windows Form Designer support
//
InitializeComponent(); Init();
//
// TODO: Add any constructor code after InitializeComponent call
//
} /// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
} #region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.comboBoxL1 = new EBright.Learn.Form.ComboBoxL.ComboBoxL();
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.SuspendLayout();
//
// comboBoxL1
//
this.comboBoxL1.BackColor = System.Drawing.Color.AliceBlue;
this.comboBoxL1.Data = null;
this.comboBoxL1.DisplayColumns = null;
this.comboBoxL1.DrawMode = System.Windows.Forms.DrawMode.OwnerDrawVariable;
this.comboBoxL1.FilterColumns = new int[] {
  0};
this.comboBoxL1.ForeColor = System.Drawing.Color.DarkBlue;
this.comboBoxL1.Location = new System.Drawing.Point(64, 48);
this.comboBoxL1.Name = "comboBoxL1";
this.comboBoxL1.Size = new System.Drawing.Size(232, 22);
this.comboBoxL1.TabIndex = 0;
//
// comboBox1
//
this.comboBox1.BackColor = System.Drawing.Color.AliceBlue;
this.comboBox1.Font = new System.Drawing.Font("SimSun", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((System.Byte)(134)));
this.comboBox1.ForeColor = System.Drawing.SystemColors.HotTrack;
this.comboBox1.Items.AddRange(new object[] {
   "aaaa",
   "bbbb",
   "cccc",
   "dddd"});
this.comboBox1.Location = new System.Drawing.Point(64, 136);
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(216, 20);
this.comboBox1.TabIndex = 1;
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(504, 256);
this.Controls.Add(this.comboBox1);
this.Controls.Add(this.comboBoxL1);
this.Name = "Form1";
this.Text = "Form1";
this.ResumeLayout(false); }
#endregion /// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
} private void Init()
{
#region 数据
//构造数据表
DataTable dt = new DataTable() ;
dt.Columns.Add("CODE") ;
dt.Columns.Add("NAME") ;
dt.Columns.Add("SCODE") ;
DataRow dr0 = dt.NewRow() ;
dr0["CODE"] = 0;
dr0["NAME"] = "深圳华为";
dr0["SCODE"] = "szhw";
dt.Rows.Add(dr0); DataRow dr1 = dt.NewRow() ;
dr1["CODE"] = 1;
dr1["NAME"] = "青岛啤酒";
dr1["SCODE"] = "qdpj";
dt.Rows.Add(dr1); DataRow dr2 = dt.NewRow() ;
dr2["CODE"] = 2;
dr2["NAME"] = "安徽奇瑞";
dr2["SCODE"] = "ahqr";
dt.Rows.Add(dr2); DataRow dr3 = dt.NewRow() ;
dr3["CODE"] = 3;
dr3["NAME"] = "北京国际";
dr3["SCODE"] = "bjgj";
dt.Rows.Add(dr3); DataRow dr4 = dt.NewRow() ;
dr4["CODE"] = 4;
dr4["NAME"] = "北京奥运";
dr4["SCODE"] = "bjay";
dt.Rows.Add(dr4); DataRow dr5 = dt.NewRow() ;
dr5["CODE"] = 5;
dr5["NAME"] = "重庆解答";
dr5["SCODE"] = "cqjd";
dt.Rows.Add(dr5); DataRow dr6 = dt.NewRow() ;
dr6["CODE"] = 6;
dr6["NAME"] = "大中华";
dr6["SCODE"] = "dzh";
dt.Rows.Add(dr6); DataRow dr7 = dt.NewRow() ;
dr7["CODE"] = 7;
dr7["NAME"] = "儿童节";
dr7["SCODE"] = "etj";
dt.Rows.Add(dr7); DataRow dr8 = dt.NewRow() ;
dr8["CODE"] = 8;
dr8["NAME"] = "伏天汽车";
dr8["SCODE"] = "ftqc";
dt.Rows.Add(dr8); DataRow dr9 = dt.NewRow() ;
dr9["CODE"] = 9;
dr9["NAME"] = "共北口岸";
dr9["SCODE"] = "gbka";
dt.Rows.Add(dr9); DataRow dr10 = dt.NewRow() ;
dr10["CODE"] = 10;
dr10["NAME"] = "河南面条";
dr10["SCODE"] = "hnmt";
dt.Rows.Add(dr10); DataRow dr11 = dt.NewRow() ;
dr11["CODE"] = 11;
dr11["NAME"] = "一为棵";
dr11["SCODE"] = "iwk";
dt.Rows.Add(dr11); DataRow dr12 = dt.NewRow() ;
dr12["CODE"] = 12;
dr12["NAME"] = "济南大饼";
dr12["SCODE"] = "jndb";
dt.Rows.Add(dr12); DataRow dr13 = dt.NewRow() ;
dr13["CODE"] = 13;
dr13["NAME"] = "开山桃";
dr13["SCODE"] = "kst";
dt.Rows.Add(dr13); DataRow dr14 = dt.NewRow() ;
dr14["CODE"] = 14;
dr14["NAME"] = "珠江啤酒";
dr14["SCODE"] = "zjpj";
dt.Rows.Add(dr14); DataRow dr15 = dt.NewRow() ;
dr15["CODE"] = 15;
dr15["NAME"] = "芜湖小吃";
dr15["SCODE"] = "whxc";
dt.Rows.Add(dr15); DataRow dr16 = dt.NewRow() ;
dr16["CODE"] = 16;
dr16["NAME"] = "西江月";
dr16["SCODE"] = "xjy";
dt.Rows.Add(dr16); DataRow dr17 = dt.NewRow() ;
dr17["CODE"] = 17;
dr17["NAME"] = "其山老妖b";
dr17["SCODE"] = "qsly";
dt.Rows.Add(dr17); DataRow drx = dt.NewRow() ;
drx["CODE"] = -1;
drx["NAME"] = "";
drx["SCODE"] = "";
dt.Rows.InsertAt(drx,0) ; #endregion
this.comboBoxL1.Data = dt;
this.comboBoxL1.ValueMember = "CODE";
this.comboBoxL1.DisplayMember = "NAME";
this.comboBoxL1.DisplayColumns = new int[]{1,2} ;
this.comboBoxL1.FilterColumns = new int[]{1,2} ; //this.comboBox1.DataSource = dt;
//this.comboBox1.ValueMember = "CODE";
//this.comboBox1.DisplayMember = "NAME";
}
}
}

http://www.cnblogs.com/lovvver/archive/2006/09/30/519408.html

调试易

如何用c#實現combobox下拉多列數據顯示與選擇

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