combobox 绑定多列例子

C#语言基础

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开发语言：C#
实例大小：0.10M
下载次数：52
浏览次数：492
发布时间：2015-06-12
实例类别：C#语言基础
发布人：crazycode
文件格式：.zip
所需积分：2

实例介绍

【实例简介】

【实例截图】

【核心代码】

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
 
namespace MyCustomControls
{
    public delegate void AfterRowSelectEventHandler(object sender, DataRow SelectedRow);
    /// <summary>
    /// Summary description for MultiColumnComboPopup.
    /// </summary>
    public class MultiColumnComboPopup : System.Windows.Forms.Form
    {
        /// <summary>
        /// Required designer variable.
        /// </summary>
        private System.ComponentModel.Container components = null;
        private DataRow selectedRow = null;
        private System.Windows.Forms.ListView lstvMyView;
        private DataRow[] inputRows = null;
        private DataTable dataTable = null;
        private int mCols = 0;
        private int mRows = 0;
        private string[] columnsToDisplay = null;
        private string[][] data = null;
 
        public event AfterRowSelectEventHandler AfterRowSelectEvent; 
         
         
        public MultiColumnComboPopup()
        {
            InitializeComponent();
            mCols = 4;
            mRows = 0;
            InitializeGridProperties();
        }
 
        public MultiColumnComboPopup(DataRow[] drows) {
            InitializeComponent();
            this.inputRows = drows;
            SetDataRows(inputRows);
            this.dataTable = inputRows[0].Table;
        }
 
        public MultiColumnComboPopup(DataTable dtable, ref DataRow selRow, string[] colsToDisplay) {
            InitializeComponent();
            this.dataTable = dtable;
            this.selectedRow = selRow;
            this.columnsToDisplay = colsToDisplay;
            if(columnsToDisplay!=null)
                SetDataTable(dataTable,columnsToDisplay);
            else
                SetDataTable(dataTable);
        }
 
        /// <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.lstvMyView = new System.Windows.Forms.ListView();
            this.SuspendLayout();
            // 
            // lstvMyView
            // 
            this.lstvMyView.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.lstvMyView.Dock = System.Windows.Forms.DockStyle.Fill;
            this.lstvMyView.FullRowSelect = true;
            this.lstvMyView.GridLines = true;
            this.lstvMyView.HeaderStyle = System.Windows.Forms.ColumnHeaderStyle.Nonclickable;
            this.lstvMyView.MultiSelect = false;
            this.lstvMyView.Name = "lstvMyView";
            this.lstvMyView.Size = new System.Drawing.Size(292, 88);
            this.lstvMyView.TabIndex = 0;
            this.lstvMyView.View = System.Windows.Forms.View.Details;
            this.lstvMyView.KeyDown  = new System.Windows.Forms.KeyEventHandler(this.lstvMyView_KeyDown);
            this.lstvMyView.DoubleClick  = new System.EventHandler(this.lstvMyView_DoubleClick);
            // 
            // MultiColumnComboPopup
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(292, 88);
            this.ControlBox = false;
            this.Controls.AddRange(new System.Windows.Forms.Control[] {
                                                                          this.lstvMyView});
            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
            this.KeyPreview = true;
            this.Name = "MultiColumnComboPopup";
            this.ShowInTaskbar = false;
            this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;
            this.KeyDown  = new System.Windows.Forms.KeyEventHandler(this.MultiColumnComboPopup_KeyDown);
            this.Leave  = new System.EventHandler(this.MultiColumnComboPopup_Leave);
            this.Deactivate  = new System.EventHandler(this.MultiColumnComboPopup_Deactivate);
            this.ResumeLayout(false);
 
        }
        #endregion
 
        #region Functions
        private void InitializeGridProperties() {
            lstvMyView.Items.Clear();
            lstvMyView.Columns.Clear();
             
            //Add Data Headers
            for(int i=0;i<mCols;i  ) {
                lstvMyView.Columns.Add(columnsToDisplay[i],-1,HorizontalAlignment.Left);
            }
             
            //Add Empty Values
            for(int i=0;i<mRows;i  ) {
                ListViewItem item = new ListViewItem("");
                lstvMyView.Items.Add(item);
                for(int j=0;j<mCols;j  ) {
                    item.SubItems.Add(" ");
                }
            }
             
        }
 
        public void SetCellValue(int Row, int Column, string ItemValue) {
            if(IsValidRowAndColumn(Row,Column)) {
                if(Column == 0) {
                    lstvMyView.Items[Row].Text = ItemValue;
                }
                else {
                    lstvMyView.Items[Row].SubItems[Column].Text = ItemValue;
                }
            }
        }
 
        public string GetCellValue(int Row, int Column) {
            if(IsValidRowAndColumn(Row,Column)) {
                if(Column == 0) {
                    return lstvMyView.Items[Row].Text;
                }
                else {
                    return lstvMyView.Items[Row].SubItems[Column].Text;
                }
            }
            else {
                return null;
            }
        }
 
        public void SetFullRow(int Row, string[] ItemValues) {
            if(IsValidRow(Row)) {
                if(ItemValues.Length > 0) {
                    for(int i=0;i<ItemValues.Length;i  ) {
                        SetCellValue(Row,i,ItemValues[i]);
                    }
                }
                else {
                    MessageBox.Show(this,"SetFullRow: Empty Values Sent","Grid Error");
                }
            }
        }
 
        public void SetFullRow(int Row, DataRow drow) {
            if(IsValidRow(Row)) {
                if(mCols > 0) {
                    for(int i=0;i<mCols;i  ) {
                        SetCellValue(Row,i,(string)drow[i]);
                    }
                }
                else {
                    MessageBox.Show(this,"SetFullRow: Empty Values Sent","Grid Error");
                }
            }
        }
 
        public void SetFullColumn(int Column, string[] ItemValues) {
            if(IsValidColumn(Column)) {
                if(ItemValues.Length > 0) {
                    for(int i=0;i<lstvMyView.Items.Count;i  ) {
                        SetCellValue(i,Column,ItemValues[i]);
                    }
                }
                else {
                    MessageBox.Show(this,"SetFullColumn: Empty Values Sent","Grid Error");
                }
            }
        }
 
        public string[] GetFullRow(int Row) {
            string[] ItemValues = new string[lstvMyView.Columns.Count];
            if(IsValidRow(Row)) {
                for(int i=0;i<lstvMyView.Items.Count;i  ) {
                    ItemValues[i] = GetCellValue(Row,i);                
                }
                return ItemValues;
            }
            else {
                return null;
            }
        }
 
        public string[] GetFullColumn(int Column) {
            string[] ItemValues = new string[lstvMyView.Items.Count];
            if(IsValidColumn(Column)) {
                for(int i=0;i<lstvMyView.Items.Count;i  ) {
                    ItemValues[i] = GetCellValue(i,Column);
                }
                return ItemValues;
            }
            else {
                return null;
            }
        }
 
        public void AddItems(string[][] ItemValues) {
            if(ItemValues.Length > 0) {
                mRows = ItemValues.Length;
                mCols = ItemValues[0].Length;
                InitializeGridProperties();
                for(int i=0;i<mRows;i  ) {
                    SetFullRow(i,ItemValues[i]);
                }
            }
            else {
                MessageBox.Show(this,"AddItems: Empty Values Sent","Grid Error");
            }
        }
 
        public string[][] GetItems() {
            string[][] ItemValues= new string[lstvMyView.Items.Count][];
            for(int i=0;i<lstvMyView.Items.Count;i  ) {
                ItemValues[i] = GetFullRow(i);
            }
            return ItemValues;
        }
 
        public void SetColumnHeaderNames(string[] ColumnNames) {
            for(int i=0;i<ColumnNames.Length;i  ) {
                if(i>=lstvMyView.Columns.Count) {
                    lstvMyView.Columns.Add(ColumnNames[i],25,HorizontalAlignment.Center);
                    lstvMyView.Columns[i].Width = ColumnNames[i].Length * (int)Font.SizeInPoints;
                }
                else {
                    lstvMyView.Columns[i].Text = ColumnNames[i];
                    lstvMyView.Columns[i].Width = ColumnNames[i].Length * (int)Font.SizeInPoints;
                }
            }
        }
 
        public void SetColumnWidths(int[] Widths) {
            for(int i=0;i<Widths.Length;i  ) {
                if(i >= lstvMyView.Columns.Count) {
                    lstvMyView.Columns.Add("",Widths[i] * (int)lstvMyView.Font.SizeInPoints ,HorizontalAlignment.Center);
                }
                else {
                    lstvMyView.Columns[i].Width = Widths[i] * (int)Font.SizeInPoints;
                }
            }
        }
 
        public void SetColumnWidth(int Column, int ColWidth) {
            if(IsValidColumn(Column)) {
                lstvMyView.Columns[Column].Width = ColWidth * (int)Font.SizeInPoints;
            }
        }
 
        public void SetDataTable(DataTable dtable) {
            DataColumnCollection dcc = dtable.Columns;
            DataRowCollection drc = dtable.Rows; 
            data = new string[drc.Count][];
            string[] strarrColNames = null;
            int ictr = 0;
             
            for(int i=0;i<drc.Count;i  ) {
                data[i] = new string[dcc.Count];
            }
 
            foreach (DataRow dr in drc) {
                for(int i=0;i<dcc.Count;i  ) {
                    data[ictr][i] = dr[i].ToString();
                }
                ictr  ;
            }
 
            strarrColNames = new string[dcc.Count];
            for(int i=0;i<dcc.Count;i  ) {
                strarrColNames[i] = dcc[i].ColumnName;
            }
 
            AddItems(data);
            //SetColumnHeaderNames(strarrColNames);
        }
 
        public void SetDataTable(DataTable dtable,string[] colsToDisplay) {
            DataRowCollection drc = dtable.Rows; 
            data = new string[drc.Count][];
            int ictr = 0;
             
            for(int i=0;i<drc.Count;i  ) {
                data[i] = new string[colsToDisplay.Length];
            }
 
            foreach (DataRow dr in drc) {
                for(int i=0;i<colsToDisplay.Length;i  ) {
                    data[ictr][i] = dr[colsToDisplay[i]].ToString();
                }
                ictr  ;
            }
 
            AddItems(data);
            //SetColumnHeaderNames(colsToDisplay);
        }
         
        private bool IsValidRowAndColumn(int Row, int Column) {
            if(Column < 0 || Row < 0) {
                MessageBox.Show(this,"Row or Column Cannot be Negative!","Grid Error");
                return false;
            }
            else if(Row > lstvMyView.Items.Count) {
                MessageBox.Show(this,"SetCellValue: Row Out Of Range","Grid Error");    
                return false;
            }
            else if(Column > lstvMyView.Columns.Count) {
                MessageBox.Show(this,"SetCellValue: Column Out Of Range "   Column.ToString(),"Grid Error");
                return false;
            }
            else {
                return true;
            }
        }
 
        private bool IsValidRow(int Row) {
            if(Row < 0) {
                MessageBox.Show(this,"Row Cannot be Negative!","Grid Error");
                return false;
            }
            else if(Row > lstvMyView.Items.Count) {
                MessageBox.Show(this,"Row Out Of Range","Grid Error");  
                return false;
            }
            else {
                return true;
            }
        }
 
        private bool IsValidColumn(int Column) {
            if(Column < 0) {
                MessageBox.Show(this,"Column Cannot be Negative!","Grid Error");
                return false;
            }
            else if(Column > lstvMyView.Columns.Count) {
                MessageBox.Show(this,"Column Out Of Range "   Column.ToString() ,"Grid Error");
                return false;
            }
            else {
                return true;
            }
        }
        #endregion
         
        private void gridValue_SelectedIndexChanged(object sender, System.EventArgs e) {
            //
        }
 
        public void SetDataRows(DataRow[] drows){
            mRows = drows.Length;
            mCols = drows[0].Table.Columns.Count;
            InitializeGridProperties();
            for(int i=0;i<mRows;i  ) {
                SetFullRow(i,drows[i]);
            }
            SetColumnHeaderNames(GetColumnNames(drows[0]));
        }
 
        private string[] GetColumnNames(DataRow drow){
            string[] strColNames = new string[drow.Table.Columns.Count];
            for(int i=0;i<drow.Table.Columns.Count;i  ){
                strColNames[i] = drow.Table.Columns[i].ColumnName;
            }
            return strColNames;
        }
 
        private void MultiColumnComboPopup_Deactivate(object sender, System.EventArgs e) {
            this.Close();
        }
 
        private void MultiColumnComboPopup_Leave(object sender, System.EventArgs e) {
            this.Close();
        }
 
        private void MultiColumnComboPopup_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) {
            if(e.KeyData==Keys.Escape){
                this.Close();
            }
        }
 
        private void lstvMyView_KeyDown(object sender, System.Windows.Forms.KeyEventArgs e) {
            if(e.KeyData==Keys.Enter){
                if(lstvMyView.SelectedItems.Count>0){
                    selectedRow = dataTable.Rows[lstvMyView.SelectedIndices[0]];
                    if(AfterRowSelectEvent!=null)
                        AfterRowSelectEvent(this,selectedRow);
                }
                this.Close();   
            }
        }
 
        private void lstvMyView_DoubleClick(object sender, System.EventArgs e) {
            if(lstvMyView.SelectedItems.Count>0){
                selectedRow = dataTable.Rows[lstvMyView.SelectedIndices[0]];
                if(AfterRowSelectEvent!=null)
                    AfterRowSelectEvent(this,selectedRow);
            }
            this.Close();       
        }
 
        private string[] GetColumnNames(DataTable dtable){
            string[] strColNames = new string[dtable.Columns.Count];
            for(int i=0;i<dtable.Columns.Count;i  ){
                strColNames[i] = dtable.Columns[i].ColumnName;
            }
            return strColNames;
        }
 
        public DataRow[] InputRows{
            set{
                inputRows = value;
                if(inputRows == null)
                    return;
                SetDataRows(inputRows);
            }
        }
 
//      public string[] NonDisplayColumnNames{
//          set{
//              
//          }
//      }
         
        public DataTable Table{
            set{
                dataTable = value;
                if(dataTable == null)
                    return;
                SetDataTable(dataTable);
            }
        }
 
        public DataRow SelectedRow{
            get{
                return selectedRow;
            }
        }
 
        public int Cols {
            get {
                mCols = lstvMyView.Columns.Count;
                return mCols;
            }
        }
 
        public int Rows {
            get {
                mRows = lstvMyView.Items.Count;
                return mRows;
            }
        }
 
    }
}

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