自定义控件--DataGrid中实现按输入模糊查询起相关内容,支持up,down键.

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Data.OracleClient;
using System.Windows.Forms;

namespace CommonCtl
{
?///

?/// MedicineList 的摘要说明。
?///

?public class MedicineList : System.Windows.Forms.UserControl
?{
??private System.Windows.Forms.DataGrid dataGrid1;
??private System.Windows.Forms.Panel panel1;
??private System.Windows.Forms.TextBox textBox1;
??private bool ischar=true;
??private DataSet ds = new DataSet();
??private DataView dv=null;
??private string inputcode=null;
??///

??/// 必需的设计器变量。
??///

??private System.ComponentModel.Container components = null;

??public MedicineList()
??{
???// 该调用是 Windows.Forms 窗体设计器所必需的。
???InitializeComponent();
??}

??///

??/// 清理所有正在使用的资源。
??///

??protected override void Dispose( bool disposing )
??{
???if( disposing )
???{
????if(components != null)
????{
?????components.Dispose();
????}
???}
???base.Dispose( disposing );
??}
??#region 组件设计器生成的代码
??///

??/// 设计器支持所需的方法 - 不要使用代码编辑器
??/// 修改此方法的内容。
??///

??private void InitializeComponent()
??{
???this.dataGrid1 = new System.Windows.Forms.DataGrid();
???this.panel1 = new System.Windows.Forms.Panel();
???this.textBox1 = new System.Windows.Forms.TextBox();
???((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).BeginInit();
???this.panel1.SuspendLayout();
???this.SuspendLayout();
???//
???// dataGrid1
???//
???this.dataGrid1.AllowSorting = false;
???this.dataGrid1.AlternatingBackColor = System.Drawing.Color.Lavender;
???this.dataGrid1.BackColor = System.Drawing.Color.WhiteSmoke;
???this.dataGrid1.BackgroundColor = System.Drawing.Color.LightGray;
???this.dataGrid1.CaptionBackColor = System.Drawing.Color.LightSteelBlue;
???this.dataGrid1.CaptionForeColor = System.Drawing.Color.MidnightBlue;
???this.dataGrid1.CaptionText = "药品选择(拼音码)";
???this.dataGrid1.DataMember = "";
???this.dataGrid1.Dock = System.Windows.Forms.DockStyle.Fill;
???this.dataGrid1.FlatMode = true;
???this.dataGrid1.Font = new System.Drawing.Font("Tahoma", 8F);
???this.dataGrid1.ForeColor = System.Drawing.Color.MidnightBlue;
???this.dataGrid1.GridLineColor = System.Drawing.Color.Gainsboro;
???this.dataGrid1.HeaderBackColor = System.Drawing.Color.MidnightBlue;
???this.dataGrid1.HeaderFont = new System.Drawing.Font("Tahoma", 8F, System.Drawing.FontStyle.Bold);
???this.dataGrid1.HeaderForeColor = System.Drawing.Color.WhiteSmoke;
???this.dataGrid1.LinkColor = System.Drawing.Color.Teal;
???this.dataGrid1.Location = new System.Drawing.Point(0, 0);
???this.dataGrid1.Name = "dataGrid1";
???this.dataGrid1.ParentRowsBackColor = System.Drawing.Color.Gainsboro;
???this.dataGrid1.ParentRowsForeColor = System.Drawing.Color.MidnightBlue;
???this.dataGrid1.ReadOnly = true;
???this.dataGrid1.RowHeadersVisible = false;
???this.dataGrid1.RowHeaderWidth = 10;
???this.dataGrid1.SelectionBackColor = System.Drawing.Color.Orange;
???this.dataGrid1.SelectionForeColor = System.Drawing.Color.Black;
???this.dataGrid1.Size = new System.Drawing.Size(200, 168);
???this.dataGrid1.TabIndex = 1;
???this.dataGrid1.MouseUp += new System.Windows.Forms.MouseEventHandler(this.dataGrid1_MouseUp);
???//
???// panel1
???//
???this.panel1.Controls.Add(this.textBox1);
???this.panel1.Dock = System.Windows.Forms.DockStyle.Bottom;
???this.panel1.Location = new System.Drawing.Point(0, 168);
???this.panel1.Name = "panel1";
???this.panel1.Size = new System.Drawing.Size(200, 24);
???this.panel1.TabIndex = 2;
???//
???// textBox1
???//
???this.textBox1.Dock = System.Windows.Forms.DockStyle.Fill;
???this.textBox1.Location = new System.Drawing.Point(0, 0);
???this.textBox1.Name = "textBox1";
???this.textBox1.Size = new System.Drawing.Size(200, 21);
???this.textBox1.TabIndex = 0;
???this.textBox1.TabStop = false;
???this.textBox1.Text = "";
???this.textBox1.KeyDown += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyDown);
???this.textBox1.KeyUp += new System.Windows.Forms.KeyEventHandler(this.textBox1_KeyUp);
???//
???// MedicineList
???//
???this.Controls.Add(this.dataGrid1);
???this.Controls.Add(this.panel1);
???this.Name = "MedicineList";
???this.Size = new System.Drawing.Size(200, 192);
???((System.ComponentModel.ISupportInitialize)(this.dataGrid1)).EndInit();
???this.panel1.ResumeLayout(false);
???this.ResumeLayout(false);

??}
??#endregion

??///

??/// 初始化
??///

??public void Init(string inputcode)
??{
???this.inputcode=inputcode;
???string cmdtext=null;
???if(inputcode=="pym") cmdtext="select ypmc as 药品名称,pym as 拼音码,wbm as 五笔码,qtm as 其他码 from yp_ypzd order by 拼音码";
???if(inputcode=="wbm") cmdtext="select ypmc as 药品名称,pym as 拼音码,wbm as 五笔码,qtm as 其他码 from yp_ypzd order by 五笔码";
???if(inputcode=="qtm") cmdtext="select ypmc as 药品名称,pym as 拼音码,wbm as 五笔码,qtm as 其他码 from yp_ypzd order by 其他码";
???ds = DBAccess.ClassDBAccess.GetData(cmdtext,"yp_hzk");
???dataGrid1.SetDataBinding(ds,"yp_hzk");
???dv = ds.Tables["yp_hzk"].DefaultView;
??}

??private void dataGrid1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
??{
???Point pt = new Point(e.X,e.Y);
???DataGrid.HitTestInfo hit = dataGrid1.HitTest(pt);
???if(hit.Type == DataGrid.HitTestType.Cell)
???{
????dataGrid1.UnSelect(dataGrid1.CurrentRowIndex);
????dataGrid1.Select(hit.Row);
????textBox1.SelectAll();
????textBox1.Focus();
???}
??}

??private void textBox1_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e)
??{
???if(e.KeyCode==Keys.Escape){
????ischar=false;
????return;
???}
???int step=0;
???int selectrow=0;
???int allrow=dv.Count;
???if(allrow<=0) return;
???if(e.KeyCode==Keys.Up){
????ischar=false;
????step=-1;
???}
???if(e.KeyCode==Keys.Down){
????ischar=false;
????step=1;
???}
???selectrow=dataGrid1.CurrentRowIndex;
???if(dataGrid1.IsSelected(selectrow))
???{
????dataGrid1.UnSelect(dataGrid1.CurrentRowIndex);
???}
???selectrow=selectrow+step;
???if(selectrow<0)
???{
????if(dv.Count>0)
????{
?????dataGrid1.Select(0);
????}
????return;
???}
???if(selectrow>allrow-1)
???{
????if(dv.Count>0)
????{
?????dataGrid1.Select(allrow-1);
????}
????return;???
???}
???if(step!=0){
????dataGrid1.Select(selectrow);
????dataGrid1.CurrentRowIndex=selectrow;
????textBox1.Text=dataGrid1[selectrow,1].ToString();
????textBox1.SelectAll();
???}
???if(e.KeyCode==Keys.Enter){
????ischar=false;
????//返回选种的
????MessageBox.Show(dataGrid1[selectrow,1].ToString(),dataGrid1[selectrow,2].ToString());
???}
??}

??private void textBox1_KeyUp(object sender, System.Windows.Forms.KeyEventArgs e)
??{

???if(ischar)
???{
????if(inputcode=="pym") dv.RowFilter="拼音码 like '%"+textBox1.Text.Trim()+"%'";
????if(inputcode=="wbm") dv.RowFilter="五笔码 like '%"+textBox1.Text.Trim()+"%'";
????if(inputcode=="qtm") dv.RowFilter="其他码 like '%"+textBox1.Text.Trim()+"%'";
????
????dataGrid1.DataSource=dv;
????if(dv.Count>0){
?????dataGrid1.Select(0);
????}
???}
???else
???{
????ischar=true;
???}
??}
?}
}

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